refactor(modular): 完成第三與第四階段深層掃描與 Model 清理

1. 倉庫管理：新增業務類型 (Owned/External/Customer) 與車牌資訊與司機欄位。
2. 庫存管理：實作成本追蹤 (unit_cost, total_value)，更新列表與撥補單顯示。
3. 採購單：新增採購日期 (order_date)，調整欄位名稱與順序。
4. 前端優化：更新相關 TS Type 定義與 UI 顯示。

.agent/rules/framework.md

@@ -5,73 +5,64 @@ trigger: always_on
 ---
 trigger: always_on
 ---
-預設專案運行於 WSL2 的 Laravel Sail (Docker) 環境。
-開發框架規範說明書：ERP 系統 (koori-erp)
-1. 專案概述
-目標： 打造一個強大且穩定的 ERP 後台管理系統。
 
-核心架構： 採用 單體式架構配現代化前端 (Monolith with a Modern Frontend)。使用 Laravel、Inertia.js 及 React。
+# 開發框架規範說明書：ERP 系統 (star-erp)
 
-工作流程： 將 UI/UX 設計師提供的 React 原始碼，透過 Inertia.js 整合進 Laravel 環境中。
+## 1. 專案概述
+*   **目標**： 打造一個強大且穩定的 ERP 後台管理系統。
+*   **核心架構**： 採用 **模組化單體式架構 (Modular Monolith)** 配現代化前端。使用 Laravel、Inertia.js 及 React。
+*   **工作流程**： 將 UI/UX 設計師提供的 React 原始碼，透過 Inertia.js 整合進 Laravel 環境中。後端邏輯依據「業務領域」拆分為獨立模組。
 
-2. 技術棧 (Tech Stack)
-後端： PHP 8.5 / Laravel 12
+## 2. 技術棧 (Tech Stack)
+*   **後端**： PHP 8.5 / Laravel 12
+*   **前端橋樑**： Inertia.js (不使用傳統 RESTful API 串接頁面，改用 Inertia 協議)
+*   **前端庫**： React (以 Functional Components 與 Hooks 為主)
+*   **樣式處理**： Tailwind CSS (確保與 UI/UX 設計稿完全一致)
+*   **資料庫**： MySQL 8.0
+*   **開發環境**： Laravel Sail (Docker / WSL2)
+*   **未來擴充**： 針對高併發或跨平台模組，預留 Golang 微服務接口。
 
-前端橋樑： Inertia.js (不使用傳統 RESTful API 串接頁面，改用 Inertia 協議)
+## 3. 目錄結構與慣例
 
-前端庫： React (以 Functional Components 與 Hooks 為主)
+### 3.1 後端 (Laravel - Modular Monolith)
+系統採用模組化架構，核心邏輯位於 `app/Modules/` 下：
 
-樣式處理： Tailwind CSS (確保與 UI/UX 設計稿完全一致)
+*   **Modules**： 位於 `app/Modules/{ModuleName}/`。
+    *   **Controllers**： `app/Modules/{ModuleName}/Controllers/`。必須回傳 `Inertia::render()`。
+    *   **Models**： `app/Modules/{ModuleName}/Models/`。
+    *   **Routes**： `app/Modules/{ModuleName}/Routes/web.php`。各模組獨立管理路由。
+*   **Global Routes**： `routes/web.php` 僅保留全域通用路由或作為模組路由的載入點。
 
-資料庫： MySQL 8.0
+### 3.2 前端 (React)
+*   **Pages (頁面)**： 位於 `resources/js/Pages/`。每個檔案代表一個完整的路由視圖。
+*   **Components (組件)**： 位於 `resources/js/Components/`。存放由 UI/UX 團隊提供的可重複使用 UI 元件。
+*   **Layouts (版面)**： 位於 `resources/js/Layouts/`。定義 ERP 的通用版面。
 
-開發環境： Laravel Sail (Docker / WSL2)
+## 4. 整合指南 (UI/UX 轉換至 Laravel)
+*   **組件遷移**： 將 UI/UX 的 React 原始碼移入 `resources/js/` 時，應進行「原子化」拆解，提高元件複用率。
+*   **資料傳遞**： 透過 Laravel Controller 的 props 傳送動態資料給 React。優先使用 Inertia 資料流，避免初次渲染時使用 axios。
+*   **狀態管理**： 優先使用 Inertia 內建的狀態管理與 useForm hook 處理表單提交。
 
-未來擴充： 針對高併發或跨平台模組，預留 Golang 微服務接口。
+## 5. 開發標準 (Coding Standards)
+*   **命名規範**：
+    *   Controllers: `PascalCaseController.php`
+    *   React Components: `PascalCase.jsx`
+    *   Routes: `kebab-case` (小寫橫線分隔)
+*   **回傳格式**： 所有的前後端溝通需維持一致的 JSON 結構，特別是驗證錯誤 (Validation Errors) 與閃存訊息 (Flash Messages)。
 
-3. 目錄結構與慣例
-3.1 後端 (Laravel)
-Controllers： 必須回傳 Inertia::render() 來渲染頁面。
+## 6. AI 協作規則 (給 Antigravity AI)
+*   **角色設定**： 你是一位專業的全端開發工程師助手。
+*   **代碼生成指令**：
+    *   所有的解釋說明請使用 **繁體中文**。
+    *   生成 React 組件時，必須符合專案現有的 Tailwind CSS 配置。
+    *   必須考慮 ERP 邏輯（例如：權限判斷、操作日誌、資料完整性）。
+    *   新增功能時，請先判斷應歸屬於哪個 Module，並建立在 `app/Modules/` 對應目錄下。
 
-Models： 嚴格執行型別標註，使用 Eloquent 進行資料庫操作。
+## 7. 運行機制 (Docker / Sail)
+由於專案運行在 Docker 容器環境中，請勿直接在宿主機 (Host) 執行 php 或 composer 指令。請使用專案內建的 `sail` 指令：
 
-Routes： 統一在 routes/web.php 定義 Inertia 路由。
-
-3.2 前端 (React)
-Pages (頁面)： 位於 resources/js/Pages/。每個檔案代表一個完整的路由視圖。
-
-Components (組件)： 位於 resources/js/Components/。存放由 UI/UX 團隊提供的可重複使用 UI 元件。
-
-Layouts (版面)： 位於 resources/js/Layouts/。定義 ERP 的通用版面（例如：包含側邊欄 Sidebar 與導覽列 Navbar 的後台主框架）。
-
-4. 整合指南 (UI/UX 轉換至 Laravel)
-組件遷移： 將 UI/UX 的 React 原始碼移入 resources/js/ 時，應進行「原子化」拆解，提高元件複用率。
-
-資料傳遞： 透過 Laravel Controller 的 props 傳送動態資料給 React。除非是後續的異步請求，否則避免在 React 初次渲染時使用 axios 抓取資料，應優先使用 Inertia 的資料流。
-
-狀態管理： 優先使用 Inertia 內建的狀態管理與 useForm hook 處理表單提交。
-
-5. 開發標準 (Coding Standards)
-命名規範：
-
-Controllers: PascalCaseController.php
-
-React Components: PascalCase.jsx
-
-Routes: kebab-case (小寫橫線分隔)
-
-回傳格式： 所有的前後端溝通需維持一致的 JSON 結構，特別是驗證錯誤 (Validation Errors) 與閃存訊息 (Flash Messages)。
-
-6. AI 協作規則 (給 Antigravity AI)
-角色設定： 你是一位專業的全端開發工程師助手。
-
-代碼生成指令：
-
-所有的解釋說明請使用 繁體中文。
-
-生成 React 組件時，必須符合專案現有的 Tailwind CSS 配置。
-
-必須考慮 ERP 邏輯（例如：權限判斷、操作日誌、資料完整性）。
-
-7.運行機制 
-因為是運行在docker上 所以要執行php的話 要執行docker exce
+*   **啟動環境**： `./vendor/bin/sail up -d`
+*   **執行 PHP 指令**： `./vendor/bin/sail php -v`
+*   **執行 Artisan 指令**： `./vendor/bin/sail artisan route:list`
+*   **執行 Composer**： `./vendor/bin/sail composer install`
+*   **執行 Node/NPM**： `./vendor/bin/sail npm run dev`

.agent/skills/activity-logging/SKILL.md

@@ -0,0 +1,158 @@
+---
+name: 操作紀錄實作規範
+description: 規範系統內 Activity Log 的實作標準，包含後端資料過濾、快照策略、與前端顯示邏輯。
+---
+
+# 操作紀錄實作規範
+
+本文件說明如何在開發新功能時，依據系統規範實作 `spatie/laravel-activitylog` 操作紀錄，確保資料儲存效率與前端顯示一致性。
+
+## 1. 後端實作標準 (Backend)
+
+所有 Model 之操作紀錄應遵循「僅儲存變動資料」與「保留關鍵快照」兩大原則。
+
+### 1.1 啟用 Activity Log
+
+在 Model 中引用 `LogsActivity` trait 並實作 `getActivitylogOptions` 方法。
+
+```php
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class Product extends Model
+{
+    use LogsActivity;
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty() // ✅ 關鍵：只記錄有變動的欄位
+            ->dontSubmitEmptyLogs(); // 若無變動則不記錄
+    }
+}
+```
+
+### 1.2 手動記錄 (Manual Logging)
+
+若需在 Controller 手動記錄（例如需客製化邏輯），**必須**自行實作變動過濾，不可直接儲存所有屬性。
+
+**錯誤範例 (Do NOT do this):**
+```php
+// ❌ 錯誤：這會導致每次更新都記錄所有欄位，即使它們沒變
+activity()
+    ->withProperties(['attributes' => $newAttributes, 'old' => $oldAttributes])
+    ->log('updated');
+```
+
+**正確範例 (Do this):**
+```php
+// ✅ 正確：自行比對差異，只存變動值
+$changedAttributes = [];
+$changedOldAttributes = [];
+
+foreach ($newAttributes as $key => $value) {
+    if ($value != ($oldAttributes[$key] ?? null)) {
+        $changedAttributes[$key] = $value;
+        $changedOldAttributes[$key] = $oldAttributes[$key] ?? null;
+    }
+}
+
+if (!empty($changedAttributes)) {
+    activity()
+        ->withProperties(['attributes' => $changedAttributes, 'old' => $changedOldAttributes])
+        ->log('updated');
+}
+```
+
+### 1.3 快照策略 (Snapshot Strategy)
+
+為確保資料被刪除後仍能辨識操作對象，**必須**在 `properties.snapshot` 中儲存關鍵識別資訊（如名稱、代號、類別名稱）。
+
+**主要方式：使用 `tapActivity` (推薦)**
+
+```php
+public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+{
+    $properties = $activity->properties;
+    $snapshot = $properties['snapshot'] ?? [];
+
+    // 保存關鍵關聯名稱 (避免關聯資料刪除後 ID 失效)
+    $snapshot['category_name'] = $this->category ? $this->category->name : null;
+    $snapshot['po_number'] = $this->code; // 儲存單號
+    
+    // 保存自身名稱 (Context)
+    $snapshot['name'] = $this->name;
+
+    $properties['snapshot'] = $snapshot;
+    $activity->properties = $properties;
+}
+```
+
+## 2. 顯示名稱映射 (UI Mapping)
+
+### 2.1 對象名稱映射 (Mapping)
+
+需在 `ActivityLogController.php` 中設定 Model 與中文名稱的對應，讓前端列表能顯示中文對象（如「公共事業費」而非 `UtilityFee`）。
+
+**位置**: `app/Http/Controllers/Admin/ActivityLogController.php`
+
+```php
+protected function getSubjectMap()
+{
+    return [
+        'App\Modules\Inventory\Models\Product' => '商品',
+        'App\Modules\Finance\Models\UtilityFee' => '公共事業費', // ✅ 新增映射
+    ];
+}
+```
+
+### 2.2 欄位名稱中文化 (Field Translation)
+
+需在前端 `ActivityDetailDialog` 中設定欄位名稱的中文翻譯。
+
+**位置**: `resources/js/Components/ActivityLog/ActivityDetailDialog.tsx`
+
+```typescript
+const fieldLabels: Record<string, string> = {
+    // ... 既有欄位
+    'transaction_date': '費用日期',
+    'category': '費用類別',
+    'amount': '金額',
+};
+```
+
+## 3. 前端顯示邏輯 (Frontend)
+
+### 3.1 列表描述生成 (Description Generation)
+
+前端 `LogTable.tsx` 會依據 `properties.snapshot` 中的欄位自動組建描述（例如：「Admin 新增 電話費 公共事業費」）。
+
+若您的 Model 使用了特殊的識別欄位（例如 `category`），**必須**將其加入 `nameParams` 陣列中。
+
+**位置**: `resources/js/Components/ActivityLog/LogTable.tsx`
+
+```typescript
+const nameParams = [
+    'po_number', 'name', 'code', 
+    'category_name', 
+    'category' // ✅ 確保加入此欄位，前端才能抓到 $snapshot['category']
+];
+```
+
+### 3.2 詳情過濾邏輯
+
+前端 `ActivityDetailDialog` 已內建智慧過濾邏輯：
+- **Created**: 顯示初始化欄位。
+- **Updated**: **僅顯示有變動的欄位** (由 `isChanged` 判斷)。
+- **Deleted**: 顯示刪除前的完整資料。
+
+開發者僅需確保傳入的 `attributes` 與 `old` 資料結構正確，過濾邏輯會自動運作。
+
+## 檢核清單
+
+- [ ] **Backend**: Model 是否已設定 `logOnlyDirty` 或手動實作過濾？
+- [ ] **Backend**: 是否已透過 `tapActivity` 或手動方式記錄 Snapshot（關鍵名稱）？
+- [ ] **Backend**: 是否已在 `ActivityLogController` 加入 Model 中文名稱映射？
+- [ ] **Frontend**: 是否已在 `ActivityDetailDialog` 加入欄位中文翻譯？
+- [ ] **Frontend**: 若使用特殊識別欄位，是否已加入 `LogTable` 的 `nameParams`？

.agent/skills/permission-management/SKILL.md

@@ -0,0 +1,140 @@
+---
+name: 權限管理與實作規範
+description: 為新功能實作權限控制的完整流程規範，包含後端 Seeder 設定、Middleware 路由保護與前端權限判斷。
+---
+
+# 權限管理與實作規範
+
+本文件說明如何在新增功能時，一併實作完整的權限控制機制。專案採用 `spatie/laravel-permission` 套件進行權限管理。
+
+## 1. 定義權限 (Backend)
+
+所有權限皆定義於 `database/seeders/PermissionSeeder.php`。
+
+### 步驟：
+
+1.  開啟 `database/seeders/PermissionSeeder.php`。
+2.  在 `$permissions` 陣列中新增功能對應的權限字串。
+    *   **命名慣例**：`{resource}.{action}` (例如：`system.view_logs`, `products.create`)
+    *   常用動作：`view`, `create`, `edit`, `delete`, `publish`, `export`
+3.  在下方「角色分配」區段，將新權限分配給適合的角色。
+    *   `super-admin`：通常擁有所有權限（程式碼中 `Permission::all()` 自動涵蓋，無需手動新增）。
+    *   `admin`：通常擁有大部分權限。
+    *   其他角色 (`warehouse-manager`, `purchaser`, `viewer`)：依業務邏輯分配。
+
+### 範例：
+
+```php
+// 1. 新增權限字串
+$permissions = [
+    // ... 現有權限
+    'system.view_logs', // 新增：檢視系統日誌
+];
+
+// ...
+
+// 2. 分配給角色
+$admin->givePermissionTo([
+    // ... 現有權限
+    'system.view_logs',
+]);
+```
+
+## 2. 套用資料庫變更
+
+修改 Seeder 後，必須重新執行 Seeder 以將權限寫入資料庫。
+
+```bash
+# 對於所有租戶執行 Seeder (開發環境)
+php artisan tenants:seed --class=PermissionSeeder
+```
+
+## 3. 路由保護 (Backend Middleware)
+
+在 `routes/web.php` 中，使用 `permission:{name}` middleware 保護路由。
+
+### 範例：
+
+```php
+// 單一權限保護
+Route::get('/logs', [LogController::class, 'index'])
+    ->middleware('permission:system.view_logs')
+    ->name('logs.index');
+
+// 路由群組保護
+Route::middleware('permission:products.view')->group(function () {
+    // ...
+});
+
+// 多重權限 (OR 邏輯：有其一即可)
+Route::middleware('permission:products.create|products.edit')->group(function () {
+    // ...
+});
+```
+
+## 4. 前端權限判斷 (React Component)
+
+使用自訂 Hook `usePermission` 來控制 UI 元素的顯示（例如：隱藏沒有權限的按鈕）。
+
+### 引入 Hook：
+
+```tsx
+import { usePermission } from "@/hooks/usePermission";
+```
+
+### 使用方式：
+
+```tsx
+export default function ProductIndex() {
+    const { can } = usePermission();
+
+    return (
+        <div>
+            <h1>商品列表</h1>
+            
+            {/* 只有擁有 create 權限才顯示按鈕 */}
+            {can('products.create') && (
+                <Button>新增商品</Button>
+            )}
+
+            {/* 組合判斷 */}
+            {can('products.edit') && <EditButton />}
+        </div>
+    );
+}
+```
+
+### 權限 Hook 介面說明：
+
+- `can(permission: string)`: 檢查當前使用者是否擁有指定權限。
+- `canAny(permissions: string[])`: 檢查當前使用者是否擁有陣列中**任一**權限。
+- `hasRole(role: string)`: 檢查當前使用者是否擁有指定角色。
+
+## 5. 配置權限群組名稱 (Backend UI Config)
+
+為了讓新權限在「角色與權限」管理介面中顯示正確的中文分組標題，需修改 Controller 設定。
+
+### 步驟：
+
+1.  開啟 `app/Http/Controllers/Admin/RoleController.php`。
+2.  找到 `getGroupedPermissions` 方法。
+3.  在 `$groupDefinitions` 陣列中，新增 `{resource}` 對應的中文名稱。
+
+### 範例：
+
+```php
+$groupDefinitions = [
+    'products' => '商品資料管理',
+    // ...
+    'utility_fees' => '公共事業費管理', // 新增此行
+];
+```
+
+## 檢核清單
+
+- [ ] `PermissionSeeder.php` 已新增權限字串。
+- [ ] `PermissionSeeder.php` 已將新權限分配給對應角色。
+- [ ] 已執行 `php artisan tenants:seed --class=PermissionSeeder` 更新資料庫。
+- [ ] `RoleController.php` 已新增權限群組的中文名稱映射。
+- [ ] 後端路由 (`routes/web.php`) 已加上 middleware 保護。
+- [ ] 前端頁面/按鈕已使用 `usePermission` 進行顯示控制。

.agent/skills/ui-consistency/SKILL.md

@@ -57,13 +57,30 @@ tooltip
 
 ## 2. 色彩系統
 
-### 2.1 主題色 (Primary)
+### 2.1 主題色 (Primary) - **動態租戶品牌色**
 
-```css
---primary-main: #01ab83;      /* 主題綠色 - 主要操作、連結 */
---primary-dark: #018a6a;      /* 深綠色 - Hover 狀態 */
---primary-light: #33bc9a;     /* 淺綠色 - 次要強調 */
---primary-lightest: #e6f7f3;  /* 最淺綠色 - 背景、Active 狀態 */
+> **注意**：主題色會根據租戶設定（Branding）動態改變，**嚴禁**在程式碼中 Hardcode 色碼（如 `#01ab83`）。
+> 請務必使用 Tailwind Utility Class 或 CSS 變數。
+
+| Tailwind Class | CSS Variable | 說明 |
+|----------------|--------------|------|
+| `*-primary-main` | `--primary-main` | **主色**：與租戶設定一致（預設綠色），用於主要按鈕、連結、強調文字 |
+| `*-primary-dark` | `--primary-dark` | **深色**：系統自動計算，用於 Hover 狀態 |
+| `*-primary-light` | `--primary-light` | **淺色**：系統自動計算，用於次要強調 |
+| `*-primary-lightest` | `--primary-lightest` | **最淺色**：系統自動計算，用於背景底色、Active 狀態 |
+
+**運作機制**：
+`AuthenticatedLayout` 會根據後端回傳的 `branding` 資料，自動注入 CSS 變數覆寫預設值。
+
+```tsx
+// ✅ 正確：使用 Tailwind Class
+<div className="text-primary-main">...</div>
+
+// ✅ 正確：使用 CSS 變數 (自定義樣式時)
+<div style={{ borderColor: 'var(--primary-main)' }}>...</div>
+
+// ❌ 錯誤：寫死色碼 (會導致租戶無法換色)
+<div className="text-[#01ab83]">...</div>
 ```
 
 ### 2.2 灰階 (Grey Scale)
@@ -341,6 +358,62 @@ import { Plus, Pencil, Trash2, Users } from 'lucide-react';
 - 序號欄使用 `text-gray-500 font-medium text-center`
 - 操作欄使用 `flex items-center justify-center gap-2` 排列按鈕
 
+### 5.4 欄位排序規範
+
+當表格需要支援排序時，請遵循以下模式：
+
+1.  **圖標邏輯**：
+    *   未排序：`ArrowUpDown` (class: `text-muted-foreground`)
+    *   升冪 (asc)：`ArrowUp` (class: `text-primary`)
+    *   降冪 (desc)：`ArrowDown` (class: `text-primary`)
+2.  **結構**：在 `TableHead` 內使用 `button` 元素。
+3.  **後端配合**：後端 Controller **必須** 處理 `sort_by` 與 `sort_order` 參數。
+
+```tsx
+// 1. 定義 Helper Component (在元件內部)
+const SortIcon = ({ field }: { field: string }) => {
+    if (filters.sort_by !== field) {
+        return <ArrowUpDown className="h-4 w-4 text-muted-foreground ml-1" />;
+    }
+    if (filters.sort_order === "asc") {
+        return <ArrowUp className="h-4 w-4 text-primary ml-1" />;
+    }
+    return <ArrowDown className="h-4 w-4 text-primary ml-1" />;
+};
+
+// 2. 表格標題應用
+<TableHead>
+    <button 
+        onClick={() => handleSort('created_at')} 
+        className="flex items-center hover:text-gray-900"
+    >
+        建立時間 <SortIcon field="created_at" />
+    </button>
+</TableHead>
+
+// 3. 排序處理函式 (三態切換：未排序 -> 升冪 -> 降冪 -> 未排序)
+const handleSort = (field: string) => {
+    let newSortBy: string | undefined = field;
+    let newSortOrder: 'asc' | 'desc' | undefined = 'asc';
+
+    if (filters.sort_by === field) {
+        if (filters.sort_order === 'asc') {
+            newSortOrder = 'desc';
+        } else {
+            // desc -> reset (回到預設排序)
+            newSortBy = undefined;
+            newSortOrder = undefined;
+        }
+    }
+
+    router.get(
+        route(route().current()!),
+        { ...filters, sort_by: newSortBy, sort_order: newSortOrder },
+        { preserveState: true, replace: true }
+    );
+};
+```
+
 ---
 
 ## 6. 分頁規範
@@ -633,6 +706,109 @@ import { SearchableSelect } from "@/Components/ui/searchable-select";
 
 ---
 
+## 11.4 對話框 (Dialog) 滾動與佈局
+
+當對話框內容可能超出螢幕高度時（如長表單或詳細資料），**請勿使用 `ScrollArea`**，應直接在 `DialogContent` 使用原生的 `overflow-y-auto`。
+
+**原因**：`ScrollArea` 在 Flex 佈局計算高度時容易失效或導致雙重滾動條。以及與原生捲動行為不一致。
+
+```tsx
+// ❌ 錯誤：使用 ScrollArea 或固定高度計算
+<DialogContent className="max-w-3xl">
+  <ScrollArea className="h-[500px]">
+    {/* 內容 */}
+  </ScrollArea>
+</DialogContent>
+
+// ✅ 正確：直接使用 overflow-y-auto 與 max-h
+<DialogContent className="max-w-3xl max-h-[90vh] overflow-y-auto">
+  <DialogHeader>...</DialogHeader>
+  <form className="p-6">
+    {/* 內容會自動滾動 */}
+  </form>
+  <DialogFooter>...</DialogFooter>
+</DialogContent>
+```
+
+---
+
+## 11.5 輸入框尺寸 (Input Sizes)
+
+為確保介面整齊與統一，所有表單輸入元件標準高度應為 **`h-9`** (36px)，與標準按鈕尺寸對齊。
+
+- **Input**: 預設即為 `h-9` (由 `py-1` 與 `text-sm` 組合而成)
+- **Select / SearchableSelect**: 必須確保 Trigger 按鈕高度為 `h-9`
+- **禁止使用**: 除非有特殊設計需求，否則避免使用 `h-10` (40px) 或其他非標準高度。
+
+## 11.6 日期輸入框樣式 (Date Input Style)
+
+日期輸入框應採用「**左側裝飾圖示 + 右側原生操作**」的配置，以保持視覺一致性並保留瀏覽器原生便利性。
+
+**樣式規格**：
+1.  **容器**: 使用 `relative` 定位。
+2.  **圖標**: 使用 `Calendar` 圖標，放置於絕對位置 `absolute left-2.5 top-2.5`，顏色 `text-gray-400`，並設定 `pointer-events-none` 避免干擾點擊。
+3.  **輸入框**: 設定 `pl-9` (左內距) 以避開圖示，並使用原生 `type="date"` 或 `type="datetime-local"`。
+
+```tsx
+import { Calendar } from "lucide-react";
+import { Input } from "@/Components/ui/input";
+
+<div className="relative">
+  <Calendar className="absolute left-2.5 top-2.5 h-4 w-4 text-gray-400 pointer-events-none" />
+  <Input
+    type="date"
+    className="pl-9 block w-full"
+    value={date}
+    onChange={(e) => setDate(e.target.value)}
+  />
+</div>
+```
+
+## 11.7 搜尋選單樣式 (SearchableSelect Style)
+
+`SearchableSelect` 元件在表單或篩選列中使用時，高度必須設定為 `h-9` 以與輸入框對齊。
+
+```tsx
+<SearchableSelect
+  className="h-9" // 確保高度一致
+  // ...other props
+/>
+```
+
+## 11.8 篩選列規範 (Filter Bar Norms)
+
+列表頁面的篩選區域（Filter Bar）應遵循以下規範以節省空間並保持層級清晰：
+
+1.  **標籤文字 (Labels)**: 使用 **`text-xs`** (`12px`) 大小，顏色建議使用 `text-gray-500` 或 `text-grey-2`。這與一般表單 (`text-sm`) 不同，目的是降低篩選列的視覺權重。
+2.  **輸入元件高度**: 統一使用 **`h-9`** (`36px`)。
+3.  **佈局**:
+    - **容器內距**: 統一使用 **`p-5`** (`20px`)。
+    - **Grid 間距**: 建議使用 **`gap-4`** (`16px`) 或 `gap-6` (`24px`)，但同一專案內需統一。本專案推薦 **`gap-4`**。
+    - **垂直間距**: Label 與 Input 之間使用 **`space-y-1`** (`4px`)。
+    - **排版**: 建議使用 Grid 系統 (`grid-cols-12`) 進行排版。
+
+```tsx
+<div className="space-y-1">
+  <Label className="text-xs font-medium text-grey-2">關鍵字搜尋</Label>
+  <Input className="h-9" placeholder="..." />
+</div>
+```
+
+4.  **操作按鈕區 (Action Bar)**:
+    - **位置**: 位於篩選列最下方。
+    - **樣式**: 統一使用 `flex items-center justify-end border-t border-grey-4 pt-5 gap-3`。
+    - **說明**: `border-grey-4` 為標準通用邊框色，`pt-5` 與容器 padding (`p-5`) 呼應，維持視覺平衡。
+
+5.  **收合模式 (Collapsible Mode)**:
+    - **目的**: 節省垂直空間，預設隱藏較佔空間與低頻使用的篩選器（如日期區間）。
+    - **實作**:
+        - 預設狀態：若無相關篩選值，則預設為 **收合 (Collapsed)**。
+        - 切換按鈕：位於 Action Bar 左側 (`mr-auto`)。
+        - 樣式：Ghost Button + `ChevronDown`/`ChevronUp` Icon + 提示圓點 (Indicator)。
+    - **邏輯**: 若載入頁面時已有被隱藏的篩選值 (e.g. `date_start`)，則強制 **展開 (Expanded)** 或顯示提示。
+
+---
+
 ## 12. 檢查清單
 
 在開發或審查頁面時，請確認以下項目：

.gitea/workflows/deploy.yaml

@@ -132,7 +132,7 @@ jobs:
             --exclude='vendor' \
             --exclude='public/build' \
             -e "ssh -p 2224 -i ~/.ssh/id_rsa_prod -o StrictHostKeyChecking=no" \
-            ./ root@erp.koori.tw:/var/www/koori-erp-prod/
+            ./ root@erp.koori.tw:/var/www/star-erp/
           rm ~/.ssh/id_rsa_prod
 
 
@@ -146,7 +146,11 @@ jobs:
           username: root
           key: ${{ secrets.PROD_SSH_KEY }}
           script: |
-            cd /var/www/koori-erp-prod
+            cd /var/www/star-erp
+            # [Patch] 修正正式機 Nginx Proxy 配置 (對應外部 SSL/OpenResty)
+            sed -i "s/- '8080:8080'/- '80:80'\n            - '8080:8080'/" compose.yaml
+            sed -i "s/demo-proxy.conf/prod-proxy.conf/" compose.yaml
+
             # 檢查最近的 commit 是否包含 Dockerfile 或 compose.yaml 的變更
             if git diff --name-only HEAD~1 HEAD 2>/dev/null | grep -qE '(Dockerfile|compose\.yaml|docker-compose\.yaml)'; then
               echo "REBUILD_NEEDED=true"
@@ -163,7 +167,7 @@ jobs:
           username: root
           key: ${{ secrets.PROD_SSH_KEY }}
           script: |
-            cd /var/www/koori-erp-prod
+            cd /var/www/star-erp
             chown -R 1000:1000 .
             
             # 檢查是否需要重建
@@ -173,7 +177,7 @@ jobs:
             else
               echo "⚡ 無 Docker 檔案變更，僅重載服務..."
               # 確保容器正在運行（若未運行則啟動）
-              if ! docker ps --format '{{.Names}}' | grep -q 'koori-erp-laravel'; then
+              if ! docker ps --format '{{.Names}}' | grep -q 'star-erp-laravel'; then
                 echo "容器未運行，正在啟動..."
                 WWWGROUP=1000 WWWUSER=1000 docker compose up -d --wait
               else
@@ -181,9 +185,9 @@ jobs:
               fi
             fi
             
-            echo "容器狀態：" && docker ps --filter "name=koori-erp-laravel"
+            echo "容器狀態：" && docker ps --filter "name=star-erp-laravel"
 
-            docker exec -u 1000:1000 -w /var/www/html koori-erp-laravel sh -c "
+            docker exec -u 1000:1000 -w /var/www/html star-erp-laravel sh -c "
               composer install --no-dev --optimize-autoloader &&
               npm install &&
               npm run build
@@ -193,4 +197,4 @@ jobs:
               php artisan optimize &&
               php artisan view:cache
             "
-            docker exec koori-erp-laravel chmod -R 775 /var/www/html/storage /var/www/html/bootstrap/cache
+            docker exec star-erp-laravel chmod -R 775 /var/www/html/storage /var/www/html/bootstrap/cache

.gitignore

@@ -24,3 +24,5 @@ Homestead.yaml
 Thumbs.db
 酒水客戶導入規劃.md
 智慧補貨系統分析報告.md
+
+/docs/pptx_build

README.md

@@ -11,6 +11,87 @@ Star ERP 是一個基於 **Laravel 12**、**Inertia.js (React)** 與 **Tailwind
 - **UI 框架**: Tailwind CSS
 - **基礎設施**: Docker (Laravel Sail), Nginx Reverse Proxy, MySQL 8.0, Redis
 
+## 📂 系統功能詳細說明
+
+### 🌳 系統功能架構樹 (含 2.0 升級規劃)
+```text
+Star ERP
+├── 🏠 儀表板 (Dashboard)
+│   ├── 📊 數據看板 (原有)
+│   ├── 🔔 營運警示 (原有)
+│   ├── ✨ 銷售熱力圖 (新)
+│   ├── ✨ 庫存效期預警 (新)
+│   └── ✨ 待出貨監控 (新)
+├── ✨ 🤝 銷售與全通路 (Sales & CRM) 【New】
+│   ├── ✨ 全通路訂單整合
+│   ├── ✨ 客戶管理 (CRM)
+│   └── ✨ 促銷活動
+├── 📦 商品與庫存管理
+│   ├── 📄 商品資料 (原有)
+│   ├── 🏢 倉庫管理 (原有)
+│   ├── 🚚 內調撥 (原有)
+│   ├── ✨ 屬性管理 (過敏原/成分)
+│   ├── ✨ 效期監控 (FEFO)
+│   └── ✨ 智慧補貨建議 (AI)
+├── ✨ 🚚 智慧物流 (Logistics) 【New】
+│   ├── ✨ 路徑規劃
+│   └── ✨ 裝車單管理
+├── 🏭 生產與品質管理
+│   ├── 📝 生產工單 (原有)
+│   ├── 🧪 原料耗用 (原有)
+│   ├── ✨ 配方管理 (Recipe)
+│   ├── ✨ 品質檢驗 (QC)
+│   └── ✨ 雙向溯源 (原料<->成品)
+├── 🛒 採購與廠商
+│   ├── 👥 廠商資料 (原有)
+│   ├── 📝 採購單 (原有)
+│   └── ✨ 供應商評鑑 (新)
+├── 💰 財務管理
+│   ├── 🧾 公共事業費 (原有)
+│   ├── ✨ 應收/應付帳款 (AR/AP)
+│   └── ✨ 成本精算 (料工費)
+├── 📊 報表管理
+│   └── 📑 會計報表 (原有)
+└── ⚙️ 系統管理 (原有)
+    ├── 👤 使用者管理
+    ├── 🛡️ 角色與權限
+    └── 📜 操作紀錄
+```
+
+---
+
+#### 1. 🏠 儀表板 (Dashboard)
+- **數據看板**：顯示商品總數、供應商數、活躍倉庫數等。
+- **營運警示**：低庫存商品與待辦事項警示。
+- **✨ 強化功能**：銷售熱力圖、庫存效期預警、待出貨監控。
+
+#### 2. ✨ 🤝 銷售與全通路 (Sales & CRM)
+- **全通路訂單**：整合 POS、品牌電商、智慧販賣機訂單。
+- **客戶管理 (CRM)**：會員資料庫、消費歷史與等級。
+- **促銷活動**：滿額折、買一送一、組合價等折扣引擎。
+
+#### 3. 📦 商品與庫存管理
+- **商品資料**：品名、規格、多單位換算。
+- **倉庫管理**：多站點庫存監控、銷售設定。
+- **內調撥**：倉庫間庫存轉移。
+- **✨ 強化功能**：過敏原/成分管理、**FEFO (先到期先出)** 效期監控、AI 智慧補貨建議。
+
+#### 4. 🏭 生產與品質管理
+- **生產工單**：排程管理、生產入庫。
+- **✨ 強化功能**：配方管理 (Recipe V.C.)、QC 檢驗流程 (IQC/IPQC/FQC)、**雙向溯源** (原料 <-> 成品)。
+
+#### 5. 🛒 採購與廠商
+- **採購單**：詢價、下單、收貨與驗收流程。
+- **✨ 強化功能**：供應商評鑑系統。
+
+#### 6. 💰 財務管理
+- **公共事業費**：水電氣網等固定支出。
+- **✨ 強化功能**：應收/應付帳款 (AR/AP) 管理、**成本精算** (料工費分攤)。
+
+#### 7. ⚙️ 系統管理
+- **使用者與權限**：RBAC 細緻權限控管。
+- **操作紀錄**：全系統關鍵行為軌跡 (Audit Log)。
+
 ## 🚀 快速開始
 
 ### 1. 環境準備

app/Console/Commands/MigrateToTenant.php

@@ -2,7 +2,7 @@
 
 namespace App\Console\Commands;
 
-use App\Models\Tenant;
+use App\Modules\Core\Models\Tenant;
 use Illuminate\Console\Command;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Schema;

app/Enums/WarehouseType.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Enums;
+
+enum WarehouseType: string
+{
+    case STANDARD = 'standard';     // 標準倉/總倉
+    case PRODUCTION = 'production'; // 生產倉/廚房
+    case RETAIL = 'retail';         // 門市倉/前台
+    case VENDING = 'vending';       // 販賣機倉/IoT
+    case TRANSIT = 'transit';       // 在途倉/移動倉
+    case QUARANTINE = 'quarantine'; // 瑕疵倉/報廢倉
+
+    public function label(): string
+    {
+        return match($this) {
+            self::STANDARD => '標準倉 (總倉)',
+            self::PRODUCTION => '生產倉 (廚房/加工)',
+            self::RETAIL => '門市倉 (前台销售)',
+            self::VENDING => '販賣機 (IoT設備)',
+            self::TRANSIT => '在途倉 (物流車)',
+            self::QUARANTINE => '瑕疵倉 (報廢/檢驗)',
+        };
+    }
+}

app/Http/Controllers/Admin/UserController.php

@@ -1,140 +0,0 @@
-<?php
-
-namespace App\Http\Controllers\Admin;
-
-use App\Http\Controllers\Controller;
-use App\Models\User;
-use Illuminate\Http\Request;
-use Spatie\Permission\Models\Role;
-use Inertia\Inertia;
-use Illuminate\Validation\Rule;
-use Illuminate\Support\Facades\Hash;
-
-class UserController extends Controller
-{
-    /**
-     * Display a listing of the resource.
-     */
-    public function index(Request $request)
-    {
-        $perPage = $request->input('per_page', 10);
-
-        $users = User::with(['roles:id,name,display_name'])
-            ->orderBy('id')
-            ->paginate($perPage)
-            ->withQueryString();
-
-        return Inertia::render('Admin/User/Index', [
-            'users' => $users,
-            'filters' => $request->only(['per_page']),
-        ]);
-    }
-
-    /**
-     * Show the form for creating a new resource.
-     */
-    public function create()
-    {
-        $roles = Role::pluck('display_name', 'name');
-
-        return Inertia::render('Admin/User/Create', [
-            'roles' => $roles
-        ]);
-    }
-
-    /**
-     * Store a newly created resource in storage.
-     */
-    public function store(Request $request)
-    {
-        $validated = $request->validate([
-            'name' => ['required', 'string', 'max:255'],
-            'email' => ['nullable', 'string', 'email', 'max:255', 'unique:users'],
-            'username' => ['required', 'string', 'max:255', 'unique:users'],
-            'password' => ['required', 'string', 'min:8', 'confirmed'],
-            'roles' => ['array'], 
-        ]);
-
-        $user = User::create([
-            'name' => $validated['name'],
-            'email' => $validated['email'],
-            'username' => $validated['username'],
-            'password' => Hash::make($validated['password']),
-        ]);
-
-        if (!empty($validated['roles'])) {
-            $user->syncRoles($validated['roles']);
-        }
-
-        return redirect()->route('users.index')->with('success', '使用者建立成功');
-    }
-
-    /**
-     * Show the form for editing the specified resource.
-     */
-    public function edit(string $id)
-    {
-        $user = User::with('roles')->findOrFail($id);
-        $roles = Role::get(['id', 'name', 'display_name']); 
-
-        return Inertia::render('Admin/User/Edit', [
-            'user' => $user,
-            'roles' => $roles,
-            'currentRoles' => $user->getRoleNames()
-        ]);
-    }
-
-    /**
-     * Update the specified resource in storage.
-     */
-    public function update(Request $request, string $id)
-    {
-        $user = User::findOrFail($id);
-
-        $validated = $request->validate([
-            'name' => ['required', 'string', 'max:255'],
-            'email' => ['nullable', 'string', 'email', 'max:255', Rule::unique('users')->ignore($user->id)],
-            'username' => ['required', 'string', 'max:255', Rule::unique('users')->ignore($user->id)],
-            'password' => ['nullable', 'string', 'min:8', 'confirmed'],
-            'roles' => ['array'],
-        ]);
-
-        $userData = [
-            'name' => $validated['name'],
-            'email' => $validated['email'],
-            'username' => $validated['username'],
-        ];
-
-        if (!empty($validated['password'])) {
-            $userData['password'] = Hash::make($validated['password']);
-        }
-
-        $user->update($userData);
-
-        if (isset($validated['roles'])) {
-            $user->syncRoles($validated['roles']);
-        }
-
-        return redirect()->route('users.index')->with('success', '使用者更新成功');
-    }
-
-    /**
-     * Remove the specified resource from storage.
-     */
-    public function destroy(string $id)
-    {
-        $user = User::findOrFail($id);
-
-        if ($user->hasRole('super-admin')) {
-             return back()->with('error', '無法刪除超級管理員帳號');
-        }
-        
-        if ($user->id === auth()->id()) {
-            return back()->with('error', '無法刪除自己');
-        }
-
-        $user->delete();
-
-        return redirect()->route('users.index')->with('success', '使用者已刪除');
-    }
-}

app/Http/Controllers/DashboardController.php

@@ -1,39 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use App\Models\Product;
-use App\Models\Vendor;
-use App\Models\PurchaseOrder;
-use App\Models\Warehouse;
-use App\Models\Inventory;
-use Inertia\Inertia;
-use Illuminate\Http\Request;
-
-class DashboardController extends Controller
-{
-    public function index()
-    {
-        $centralDomains = config('tenancy.central_domains', []);
-
-        $demoPort = config('tenancy.demo_tenant_port');
-        if ((!$demoPort || request()->getPort() != $demoPort) && in_array(request()->getHost(), $centralDomains)) {
-            return redirect()->route('landlord.dashboard');
-        }
-
-        $stats = [
-            'productsCount' => Product::count(),
-            'vendorsCount' => Vendor::count(),
-            'purchaseOrdersCount' => PurchaseOrder::count(),
-            'warehousesCount' => Warehouse::count(),
-            'totalInventoryValue' => Inventory::join('products', 'inventories.product_id', '=', 'products.id')
-                ->sum('inventories.quantity'), // Simplified, maybe just sum quantities for now
-            'pendingOrdersCount' => PurchaseOrder::where('status', 'pending')->count(),
-            'lowStockCount' => Inventory::whereColumn('quantity', '<=', 'safety_stock')->count(),
-        ];
-
-        return Inertia::render('Dashboard', [
-            'stats' => $stats,
-        ]);
-    }
-}

app/Http/Controllers/InventoryController.php

@@ -1,328 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use Illuminate\Http\Request;
-
-class InventoryController extends Controller
-{
-    public function index(\Illuminate\Http\Request $request, \App\Models\Warehouse $warehouse)
-    {
-        $warehouse->load([
-            'inventories.product.category',
-            'inventories.product.baseUnit',
-            'inventories.lastIncomingTransaction',
-            'inventories.lastOutgoingTransaction'
-        ]);
-        $allProducts = \App\Models\Product::with('category')->get();
-
-        // 1. 準備 availableProducts
-        $availableProducts = $allProducts->map(function ($product) {
-            return [
-                'id' => (string) $product->id, // Frontend expects string
-                'name' => $product->name,
-                'type' => $product->category?->name ?? '其他', // 暫時用 Category Name 當 Type
-            ];
-        });
-
-        // 2. 準備 inventories (模擬批號)
-        // 2. 準備 inventories
-        // 資料庫結構為 (warehouse_id, product_id) 唯一，故為扁平列表
-        $inventories = $warehouse->inventories->map(function ($inv) {
-            return [
-                'id' => (string) $inv->id,
-                'warehouseId' => (string) $inv->warehouse_id,
-                'productId' => (string) $inv->product_id,
-                'productName' => $inv->product?->name ?? '未知商品',
-                'productCode' => $inv->product?->code ?? 'N/A',
-                'unit' => $inv->product?->baseUnit?->name ?? '個',
-                'quantity' => (float) $inv->quantity,
-                'safetyStock' => $inv->safety_stock !== null ? (float) $inv->safety_stock : null,
-                'status' => '正常', // 前端會根據 quantity 與 safetyStock 重算，但後端亦可提供基礎狀態
-                'batchNumber' => 'BATCH-' . $inv->id, // DB 無批號，暫時模擬，某些 UI 可能還會用到
-                'expiryDate' => '2099-12-31', // DB 無效期，暫時模擬
-                'lastInboundDate' => $inv->lastIncomingTransaction ? ($inv->lastIncomingTransaction->actual_time ? $inv->lastIncomingTransaction->actual_time->format('Y-m-d') : $inv->lastIncomingTransaction->created_at->format('Y-m-d')) : null,
-                'lastOutboundDate' => $inv->lastOutgoingTransaction ? ($inv->lastOutgoingTransaction->actual_time ? $inv->lastOutgoingTransaction->actual_time->format('Y-m-d') : $inv->lastOutgoingTransaction->created_at->format('Y-m-d')) : null,
-            ];
-        });
-
-        // 3. 準備 safetyStockSettings
-        $safetyStockSettings = $warehouse->inventories->filter(function($inv) {
-            return !is_null($inv->safety_stock);
-        })->map(function ($inv) {
-            return [
-                'id' => 'ss-' . $inv->id,
-                'warehouseId' => (string) $inv->warehouse_id,
-                'productId' => (string) $inv->product_id,
-                'productName' => $inv->product?->name ?? '未知商品',
-                'productType' => $inv->product?->category?->name ?? '其他',
-                'safetyStock' => (float) $inv->safety_stock,
-                'createdAt' => $inv->created_at->toIso8601String(),
-                'updatedAt' => $inv->updated_at->toIso8601String(),
-            ];
-        })->values();
-
-        return \Inertia\Inertia::render('Warehouse/Inventory', [
-            'warehouse' => $warehouse,
-            'inventories' => $inventories,
-            'safetyStockSettings' => $safetyStockSettings,
-            'availableProducts' => $availableProducts,
-        ]);
-    }
-
-    public function create(\App\Models\Warehouse $warehouse)
-    {
-        // 取得所有商品供前端選單使用
-        $products = \App\Models\Product::with(['baseUnit', 'largeUnit'])->select('id', 'name', 'base_unit_id', 'large_unit_id', 'conversion_rate')->get()->map(function ($product) {
-            return [
-                'id' => (string) $product->id,
-                'name' => $product->name,
-                'baseUnit' => $product->baseUnit?->name ?? '個',
-                'largeUnit' => $product->largeUnit?->name, // 可能為 null
-                'conversionRate' => (float) $product->conversion_rate,
-            ];
-        });
-
-        return \Inertia\Inertia::render('Warehouse/AddInventory', [
-            'warehouse' => $warehouse,
-            'products' => $products,
-        ]);
-    }
-
-    public function store(\Illuminate\Http\Request $request, \App\Models\Warehouse $warehouse)
-    {
-        $validated = $request->validate([
-            'inboundDate' => 'required|date',
-            'reason' => 'required|string',
-            'notes' => 'nullable|string',
-            'items' => 'required|array|min:1',
-            'items.*.productId' => 'required|exists:products,id',
-            'items.*.quantity' => 'required|numeric|min:0.01',
-        ]);
-
-        return \Illuminate\Support\Facades\DB::transaction(function () use ($validated, $warehouse) {
-            foreach ($validated['items'] as $item) {
-                // 取得或建立庫存紀錄
-                $inventory = $warehouse->inventories()->firstOrCreate(
-                    ['product_id' => $item['productId']],
-                    ['quantity' => 0, 'safety_stock' => null]
-                );
-
-                $currentQty = $inventory->quantity;
-                $newQty = $currentQty + $item['quantity'];
-
-                // 更新庫存
-                $inventory->update(['quantity' => $newQty]);
-
-                // 寫入異動紀錄
-                $inventory->transactions()->create([
-                    'type' => '手動入庫',
-                    'quantity' => $item['quantity'],
-                    'balance_before' => $currentQty,
-                    'balance_after' => $newQty,
-                    'reason' => $validated['reason'] . ($validated['notes'] ? ' - ' . $validated['notes'] : ''),
-                    'actual_time' => $validated['inboundDate'],
-                    'user_id' => auth()->id(),
-                ]);
-            }
-
-            return redirect()->route('warehouses.inventory.index', $warehouse->id)
-                ->with('success', '庫存記錄已儲存成功');
-        });
-    }
-
-    public function edit(\App\Models\Warehouse $warehouse, $inventoryId)
-    {
-        // 取得庫存紀錄，包含商品資訊與異動紀錄 (含經手人)
-        // 這裡如果是 Mock 的 ID (mock-inv-1)，需要特殊處理
-        if (str_starts_with($inventoryId, 'mock-inv-')) {
-             return redirect()->back()->with('error', '無法編輯範例資料');
-        }
-
-        $inventory = \App\Models\Inventory::with(['product', 'transactions' => function($query) {
-            $query->orderBy('actual_time', 'desc')->orderBy('id', 'desc');
-        }, 'transactions.user'])->findOrFail($inventoryId);
-
-        // 轉換為前端需要的格式
-        $inventoryData = [
-            'id' => (string) $inventory->id,
-            'warehouseId' => (string) $inventory->warehouse_id,
-            'productId' => (string) $inventory->product_id,
-            'productName' => $inventory->product?->name ?? '未知商品',
-            'quantity' => (float) $inventory->quantity,
-            'batchNumber' => 'BATCH-' . $inventory->id, // Mock
-            'expiryDate' => '2099-12-31', // Mock
-            'lastInboundDate' => $inventory->updated_at->format('Y-m-d'),
-            'lastOutboundDate' => null,
-        ];
-
-        // 整理異動紀錄
-        $transactions = $inventory->transactions->map(function ($tx) {
-            return [
-                'id' => (string) $tx->id,
-                'type' => $tx->type,
-                'quantity' => (float) $tx->quantity,
-                'balanceAfter' => (float) $tx->balance_after,
-                'reason' => $tx->reason,
-                'userName' => $tx->user ? $tx->user->name : '系統',
-                'actualTime' => $tx->actual_time ? $tx->actual_time->format('Y-m-d H:i') : $tx->created_at->format('Y-m-d H:i'),
-            ];
-        });
-
-        return \Inertia\Inertia::render('Warehouse/EditInventory', [
-            'warehouse' => $warehouse,
-            'inventory' => $inventoryData,
-            'transactions' => $transactions,
-        ]);
-    }
-
-    public function update(\Illuminate\Http\Request $request, \App\Models\Warehouse $warehouse, $inventoryId)
-    {
-        // 若是 product ID (舊邏輯)，先轉為 inventory
-        // 但新路由我們傳的是 inventory ID
-        // 為了相容，我們先判斷 $inventoryId 是 inventory ID
-        
-        $inventory = \App\Models\Inventory::find($inventoryId);
-        
-        // 如果找不到 (可能是舊路由傳 product ID)
-        if (!$inventory) {
-             $inventory = $warehouse->inventories()->where('product_id', $inventoryId)->first();
-        }
-
-        if (!$inventory) {
-            return redirect()->back()->with('error', '找不到庫存紀錄');
-        }
-
-        $validated = $request->validate([
-            'quantity' => 'required|numeric|min:0',
-            // 以下欄位改為 nullable，支援新表單
-            'type' => 'nullable|string',
-            'operation' => 'nullable|in:add,subtract,set',
-            'reason' => 'nullable|string',
-            'notes' => 'nullable|string',
-            // 新增日期欄位驗證 (雖然暫不儲存到 DB)
-            'batchNumber' => 'nullable|string',
-            'expiryDate' => 'nullable|date',
-            'lastInboundDate' => 'nullable|date',
-            'lastOutboundDate' => 'nullable|date',
-        ]);
-
-        return \Illuminate\Support\Facades\DB::transaction(function () use ($validated, $inventory) {
-            $currentQty = $inventory->quantity;
-            $newQty = $validated['quantity'];
-            
-            // 判斷操作模式
-            if (isset($validated['operation'])) {
-                $changeQty = 0;
-                switch ($validated['operation']) {
-                    case 'add':
-                        $changeQty = $validated['quantity'];
-                        $newQty = $currentQty + $changeQty;
-                        break;
-                    case 'subtract':
-                        $changeQty = -$validated['quantity'];
-                        $newQty = $currentQty + $changeQty;
-                        break;
-                    case 'set':
-                        $changeQty = $newQty - $currentQty;
-                        break;
-                }
-            } else {
-                // 來自編輯頁面，直接 Set
-                $changeQty = $newQty - $currentQty;
-            }
-
-            // 更新庫存
-            $inventory->update(['quantity' => $newQty]);
-
-            // 異動類型映射
-            $type = $validated['type'] ?? 'adjustment';
-            $typeMapping = [
-                'adjustment' => '盤點調整',
-                'purchase_in' => '採購進貨',
-                'sales_out' => '銷售出庫',
-                'return_in' => '退貨入庫',
-                'return_out' => '退貨出庫',
-                'transfer_in' => '撥補入庫',
-                'transfer_out' => '撥補出庫',
-            ];
-            $chineseType = $typeMapping[$type] ?? $type;
-            
-            // 如果是編輯頁面來的，可能沒有 type，預設為 "盤點調整" 或 "手動編輯"
-            if (!isset($validated['type'])) {
-                $chineseType = '手動編輯';
-            }
-
-            // 寫入異動紀錄
-            // 如果數量沒變，是否要寫紀錄？通常編輯頁面按儲存可能只改了其他欄位(如果有)
-            // 但因為我們目前只存 quantity，如果 quantity 沒變，可以不寫異動，或者寫一筆 0 的異動代表更新屬性
-            if (abs($changeQty) > 0.0001) {
-                $inventory->transactions()->create([
-                    'type' => $chineseType,
-                    'quantity' => $changeQty,
-                    'balance_before' => $currentQty,
-                    'balance_after' => $newQty,
-                    'reason' => ($validated['reason'] ?? '編輯頁面更新') . ($validated['notes'] ?? ''),
-                    'actual_time' => now(), // 手動調整設定為當下
-                    'user_id' => auth()->id(),
-                ]);
-            }
-
-            return redirect()->route('warehouses.inventory.index', $inventory->warehouse_id)
-                ->with('success', '庫存資料已更新');
-        });
-    }
-
-    public function destroy(\App\Models\Warehouse $warehouse, $inventoryId)
-    {
-         $inventory = \App\Models\Inventory::findOrFail($inventoryId);
-         
-         // 歸零異動
-         if ($inventory->quantity > 0) {
-             $inventory->transactions()->create([
-                    'type' => '手動編輯',
-                    'quantity' => -$inventory->quantity,
-                    'balance_before' => $inventory->quantity,
-                    'balance_after' => 0,
-                    'reason' => '刪除庫存品項',
-                    'actual_time' => now(),
-                    'user_id' => auth()->id(),
-             ]);
-         }
-         
-         $inventory->delete();
-         
-         return redirect()->route('warehouses.inventory.index', $warehouse->id)
-                ->with('success', '庫存品項已刪除');
-    }
-
-    public function history(\App\Models\Warehouse $warehouse, $inventoryId)
-    {
-        $inventory = \App\Models\Inventory::with(['product', 'transactions' => function($query) {
-            $query->orderBy('actual_time', 'desc')->orderBy('id', 'desc');
-        }, 'transactions.user'])->findOrFail($inventoryId);
-
-        $transactions = $inventory->transactions->map(function ($tx) {
-            return [
-                'id' => (string) $tx->id,
-                'type' => $tx->type,
-                'quantity' => (float) $tx->quantity,
-                'balanceAfter' => (float) $tx->balance_after,
-                'reason' => $tx->reason,
-                'userName' => $tx->user ? $tx->user->name : '系統',
-                'actualTime' => $tx->actual_time ? $tx->actual_time->format('Y-m-d H:i') : $tx->created_at->format('Y-m-d H:i'),
-            ];
-        });
-
-        return \Inertia\Inertia::render('Warehouse/InventoryHistory', [
-            'warehouse' => $warehouse,
-            'inventory' => [
-                'id' => (string) $inventory->id,
-                'productName' => $inventory->product?->name ?? '未知商品',
-                'productCode' => $inventory->product?->code ?? 'N/A',
-                'quantity' => (float) $inventory->quantity,
-            ],
-            'transactions' => $transactions
-        ]);
-    }
-}

app/Http/Controllers/Landlord/DashboardController.php

@@ -3,7 +3,7 @@
 namespace App\Http\Controllers\Landlord;
 
 use App\Http\Controllers\Controller;
-use App\Models\Tenant;
+use App\Modules\Core\Models\Tenant;
 use Inertia\Inertia;
 
 class DashboardController extends Controller

app/Http/Controllers/Landlord/TenantController.php

@@ -3,7 +3,7 @@
 namespace App\Http\Controllers\Landlord;
 
 use App\Http\Controllers\Controller;
-use App\Models\Tenant;
+use App\Modules\Core\Models\Tenant;
 use Illuminate\Http\Request;
 use Illuminate\Validation\Rule;
 use Inertia\Inertia;

app/Http/Controllers/PurchaseOrderController.php

@@ -1,400 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use App\Models\PurchaseOrder;
-use App\Models\Vendor;
-use App\Models\Warehouse;
-use Illuminate\Http\Request;
-use Inertia\Inertia;
-use Illuminate\Support\Facades\DB;
-
-class PurchaseOrderController extends Controller
-{
-    public function index(Request $request)
-    {
-        $query = PurchaseOrder::with(['vendor', 'warehouse', 'user']);
-
-        // Search
-        if ($request->search) {
-            $query->where(function($q) use ($request) {
-                $q->where('code', 'like', "%{$request->search}%")
-                  ->orWhereHas('vendor', function($vq) use ($request) {
-                      $vq->where('name', 'like', "%{$request->search}%");
-                  });
-            });
-        }
-
-        // Filters
-        if ($request->status && $request->status !== 'all') {
-            $query->where('status', $request->status);
-        }
-
-        if ($request->warehouse_id && $request->warehouse_id !== 'all') {
-            $query->where('warehouse_id', $request->warehouse_id);
-        }
-
-        // Sorting
-        $sortField = $request->sort_field ?? 'id';
-        $sortDirection = $request->sort_direction ?? 'desc';
-        $allowedSortFields = ['id', 'code', 'status', 'total_amount', 'created_at', 'expected_delivery_date'];
-        
-        if (in_array($sortField, $allowedSortFields)) {
-            $query->orderBy($sortField, $sortDirection);
-        }
-
-        $perPage = $request->input('per_page', 10);
-        $orders = $query->paginate($perPage)->withQueryString();
-
-        return Inertia::render('PurchaseOrder/Index', [
-            'orders' => $orders,
-            'filters' => $request->only(['search', 'status', 'warehouse_id', 'sort_field', 'sort_direction', 'per_page']),
-            'warehouses' => Warehouse::all(['id', 'name']),
-        ]);
-    }
-
-    public function create()
-    {
-        $vendors = Vendor::with(['products.baseUnit', 'products.largeUnit', 'products.purchaseUnit'])->get()->map(function ($vendor) {
-            return [
-                'id' => (string) $vendor->id,
-                'name' => $vendor->name,
-                'commonProducts' => $vendor->products->map(function ($product) {
-                    return [
-                        'productId' => (string) $product->id,
-                        'productName' => $product->name,
-                        'base_unit_id' => $product->base_unit_id,
-                        'base_unit_name' => $product->baseUnit?->name,
-                        'large_unit_id' => $product->large_unit_id,
-                        'large_unit_name' => $product->largeUnit?->name,
-                        'purchase_unit_id' => $product->purchase_unit_id,
-                        'conversion_rate' => (float) $product->conversion_rate,
-                        'lastPrice' => (float) ($product->pivot->last_price ?? 0),
-                    ];
-                })
-            ];
-        });
-
-        $warehouses = Warehouse::all()->map(function ($w) {
-            return [
-                'id' => (string) $w->id,
-                'name' => $w->name,
-            ];
-        });
-
-        return Inertia::render('PurchaseOrder/Create', [
-            'suppliers' => $vendors,
-            'warehouses' => $warehouses,
-        ]);
-    }
-
-    public function store(Request $request)
-    {
-        $validated = $request->validate([
-            'vendor_id' => 'required|exists:vendors,id',
-            'warehouse_id' => 'required|exists:warehouses,id',
-            'expected_delivery_date' => 'nullable|date',
-            'remark' => 'nullable|string',
-            'invoice_number' => ['nullable', 'string', 'max:11', 'regex:/^[A-Z]{2}-\d{8}$/'],
-            'invoice_date' => 'nullable|date',
-            'invoice_amount' => 'nullable|numeric|min:0',
-            'items' => 'required|array|min:1',
-            'items.*.productId' => 'required|exists:products,id',
-            'items.*.quantity' => 'required|numeric|min:0.01',
-            'items.*.subtotal' => 'required|numeric|min:0', // 總金額
-            'items.*.unitId' => 'nullable|exists:units,id',
-        ]);
-
-        try {
-            DB::beginTransaction();
-
-            // 生成單號：YYYYMMDD001
-            $today = now()->format('Ymd');
-            $lastOrder = PurchaseOrder::where('code', 'like', $today . '%')
-                ->lockForUpdate() // 鎖定以避免並發衝突
-                ->orderBy('code', 'desc')
-                ->first();
-
-            if ($lastOrder) {
-                // 取得最後 3 碼序號並加 1
-                $lastSequence = intval(substr($lastOrder->code, -3));
-                $sequence = str_pad($lastSequence + 1, 3, '0', STR_PAD_LEFT);
-            } else {
-                $sequence = '001';
-            }
-            $code = $today . $sequence;
-
-            $totalAmount = 0;
-            foreach ($validated['items'] as $item) {
-                $totalAmount += $item['subtotal'];
-            }
-
-            // Simple tax calculation (e.g., 5%)
-            $taxAmount = round($totalAmount * 0.05, 2);
-            $grandTotal = $totalAmount + $taxAmount;
-
-            // 確保有一個有效的使用者 ID
-            $userId = auth()->id();
-            if (!$userId) {
-                $user = \App\Models\User::first();
-                if (!$user) {
-                    $user = \App\Models\User::create([
-                        'name' => '系統管理員',
-                        'email' => 'admin@example.com',
-                        'password' => bcrypt('password'),
-                    ]);
-                }
-                $userId = $user->id;
-            }
-
-            $order = PurchaseOrder::create([
-                'code' => $code,
-                'vendor_id' => $validated['vendor_id'],
-                'warehouse_id' => $validated['warehouse_id'],
-                'user_id' => $userId,
-                'status' => 'draft',
-                'expected_delivery_date' => $validated['expected_delivery_date'],
-                'total_amount' => $totalAmount,
-                'tax_amount' => $taxAmount,
-                'grand_total' => $grandTotal,
-                'remark' => $validated['remark'],
-                'invoice_number' => $validated['invoice_number'] ?? null,
-                'invoice_date' => $validated['invoice_date'] ?? null,
-                'invoice_amount' => $validated['invoice_amount'] ?? null,
-            ]);
-
-            foreach ($validated['items'] as $item) {
-                // 反算單價
-                $unitPrice = $item['quantity'] > 0 ? $item['subtotal'] / $item['quantity'] : 0;
-
-                $order->items()->create([
-                    'product_id' => $item['productId'],
-                    'quantity' => $item['quantity'],
-                    'unit_id' => $item['unitId'] ?? null, 
-                    'unit_price' => $unitPrice,
-                    'subtotal' => $item['subtotal'],
-                ]);
-            }
-
-            DB::commit();
-
-            return redirect()->route('purchase-orders.index')->with('success', '採購單已成功建立');
-
-        } catch (\Exception $e) {
-            DB::rollBack();
-            return back()->withErrors(['error' => '建立失敗：' . $e->getMessage()]);
-        }
-    }
-
-    public function show($id)
-    {
-        $order = PurchaseOrder::with(['vendor', 'warehouse', 'user', 'items.product.baseUnit', 'items.product.largeUnit'])->findOrFail($id);
-        
-        $order->items->transform(function ($item) use ($order) {
-            $product = $item->product;
-            if ($product) {
-                // 手動附加所有必要的屬性
-                $item->productId = (string) $product->id;
-                $item->productName = $product->name;
-                $item->base_unit_id = $product->base_unit_id;
-                $item->base_unit_name = $product->baseUnit?->name;
-                $item->large_unit_id = $product->large_unit_id;
-                $item->large_unit_name = $product->largeUnit?->name;
-                $item->purchase_unit_id = $product->purchase_unit_id;
-                
-                $item->conversion_rate = (float) $product->conversion_rate;
-                
-                // Fetch last price
-                $lastPrice = DB::table('product_vendor')
-                    ->where('vendor_id', $order->vendor_id)
-                    ->where('product_id', $product->id)
-                    ->value('last_price');
-                $item->previousPrice = (float) ($lastPrice ?? 0);
-
-                // 設定當前選中的單位 ID (from saved item)
-                $item->unitId = $item->unit_id; 
-
-                // 決定 selectedUnit (用於 UI 顯示)
-                if ($item->unitId && $item->large_unit_id && $item->unitId == $item->large_unit_id) {
-                    $item->selectedUnit = 'large';
-                } else {
-                    $item->selectedUnit = 'base';
-                }
-
-                $item->unitPrice = (float) $item->unit_price;
-            }
-            return $item;
-        });
-
-        return Inertia::render('PurchaseOrder/Show', [
-            'order' => $order
-        ]);
-    }
-
-    public function edit($id)
-    {
-        $order = PurchaseOrder::with(['items.product'])->findOrFail($id);
-
-        $vendors = Vendor::with(['products.baseUnit', 'products.largeUnit', 'products.purchaseUnit'])->get()->map(function ($vendor) {
-            return [
-                'id' => (string) $vendor->id,
-                'name' => $vendor->name,
-                'commonProducts' => $vendor->products->map(function ($product) {
-                    return [
-                        'productId' => (string) $product->id,
-                        'productName' => $product->name,
-                        'base_unit_id' => $product->base_unit_id,
-                        'base_unit_name' => $product->baseUnit?->name,
-                        'large_unit_id' => $product->large_unit_id,
-                        'large_unit_name' => $product->largeUnit?->name,
-                        'purchase_unit_id' => $product->purchase_unit_id,
-                        'conversion_rate' => (float) $product->conversion_rate,
-                        'lastPrice' => (float) ($product->pivot->last_price ?? 0),
-                    ];
-                })
-            ];
-        });
-
-        $warehouses = Warehouse::all()->map(function ($w) {
-            return [
-                'id' => (string) $w->id,
-                'name' => $w->name,
-            ];
-        });
-
-        // Transform items for frontend form
-        // Transform items for frontend form
-        $vendorId = $order->vendor_id;
-        $order->items->transform(function ($item) use ($vendorId) {
-            $product = $item->product;
-            if ($product) {
-                // 手動附加所有必要的屬性
-                $item->productId = (string) $product->id;
-                $item->productName = $product->name;
-                $item->base_unit_id = $product->base_unit_id;
-                $item->base_unit_name = $product->baseUnit?->name;
-                $item->large_unit_id = $product->large_unit_id;
-                $item->large_unit_name = $product->largeUnit?->name;
-                
-                $item->conversion_rate = (float) $product->conversion_rate;
-                
-                // Fetch last price
-                $lastPrice = DB::table('product_vendor')
-                    ->where('vendor_id', $vendorId)
-                    ->where('product_id', $product->id)
-                    ->value('last_price');
-                $item->previousPrice = (float) ($lastPrice ?? 0);
-                
-                // 設定當前選中的單位 ID
-                $item->unitId = $item->unit_id; // 資料庫中的 unit_id
-
-                // 決定 selectedUnit (用於 UI 狀態)
-                if ($item->unitId && $item->large_unit_id && $item->unitId == $item->large_unit_id) {
-                    $item->selectedUnit = 'large';
-                } else {
-                    $item->selectedUnit = 'base';
-                }
-
-                $item->unitPrice = (float) $item->unit_price;
-            }
-            return $item;
-        });
-
-        return Inertia::render('PurchaseOrder/Create', [
-            'order' => $order,
-            'suppliers' => $vendors,
-            'warehouses' => $warehouses,
-        ]);
-    }
-
-    public function update(Request $request, $id)
-    {
-        $order = PurchaseOrder::findOrFail($id);
-
-        $validated = $request->validate([
-            'vendor_id' => 'required|exists:vendors,id',
-            'warehouse_id' => 'required|exists:warehouses,id',
-            'expected_delivery_date' => 'nullable|date',
-            'remark' => 'nullable|string',
-            'status' => 'required|string|in:draft,pending,processing,shipping,confirming,completed,cancelled',
-            'invoice_number' => ['nullable', 'string', 'max:11', 'regex:/^[A-Z]{2}-\d{8}$/'],
-            'invoice_date' => 'nullable|date',
-            'invoice_amount' => 'nullable|numeric|min:0',
-            'items' => 'required|array|min:1',
-            'items.*.productId' => 'required|exists:products,id',
-            'items.*.quantity' => 'required|numeric|min:0.01',
-            'items.*.subtotal' => 'required|numeric|min:0', // 總金額
-            'items.*.unitId' => 'nullable|exists:units,id',
-        ]);
-
-        try {
-            DB::beginTransaction();
-
-            $totalAmount = 0;
-            foreach ($validated['items'] as $item) {
-                $totalAmount += $item['subtotal'];
-            }
-
-            // Simple tax calculation (e.g., 5%)
-            $taxAmount = round($totalAmount * 0.05, 2);
-            $grandTotal = $totalAmount + $taxAmount;
-
-            $order->update([
-                'vendor_id' => $validated['vendor_id'],
-                'warehouse_id' => $validated['warehouse_id'],
-                'expected_delivery_date' => $validated['expected_delivery_date'],
-                'total_amount' => $totalAmount,
-                'tax_amount' => $taxAmount,
-                'grand_total' => $grandTotal,
-                'remark' => $validated['remark'],
-                'status' => $validated['status'],
-                'invoice_number' => $validated['invoice_number'] ?? null,
-                'invoice_date' => $validated['invoice_date'] ?? null,
-                'invoice_amount' => $validated['invoice_amount'] ?? null,
-            ]);
-
-            // Sync items
-            $order->items()->delete();
-            foreach ($validated['items'] as $item) {
-                // 反算單價
-                $unitPrice = $item['quantity'] > 0 ? $item['subtotal'] / $item['quantity'] : 0;
-
-                $order->items()->create([
-                    'product_id' => $item['productId'],
-                    'quantity' => $item['quantity'],
-                    'unit_id' => $item['unitId'] ?? null, 
-                    'unit_price' => $unitPrice,
-                    'subtotal' => $item['subtotal'],
-                ]);
-            }
-
-            DB::commit();
-
-            return redirect()->route('purchase-orders.index')->with('success', '採購單已更新');
-
-        } catch (\Exception $e) {
-            DB::rollBack();
-            return back()->withErrors(['error' => '更新失敗：' . $e->getMessage()]);
-        }
-    }
-
-    public function destroy($id)
-    {
-        try {
-            DB::beginTransaction();
-            
-            $order = PurchaseOrder::findOrFail($id);
-            
-            // Delete associated items first (due to FK constraints if not cascade)
-            $order->items()->delete();
-            $order->delete();
-            
-            DB::commit();
-            
-            return redirect()->route('purchase-orders.index')->with('success', '採購單已刪除');
-        } catch (\Exception $e) {
-            DB::rollBack();
-            return back()->withErrors(['error' => '刪除失敗：' . $e->getMessage()]);
-        }
-    }
-}

app/Http/Controllers/VendorController.php

@@ -1,126 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use App\Models\Vendor;
-use Illuminate\Http\Request;
-
-class VendorController extends Controller
-{
-    /**
-     * Display a listing of the resource.
-     */
-    public function index(\Illuminate\Http\Request $request): \Inertia\Response
-    {
-        $query = Vendor::query();
-
-        if ($request->filled('search')) {
-            $search = $request->search;
-            $query->where(function ($q) use ($search) {
-                $q->where('name', 'like', "%{$search}%")
-                  ->orWhere('code', 'like', "%{$search}%")
-                  ->orWhere('tax_id', 'like', "%{$search}%")
-                  ->orWhere('owner', 'like', "%{$search}%")
-                  ->orWhere('contact_name', 'like', "%{$search}%");
-            });
-        }
-
-        $sortField = $request->input('sort_field', 'id');
-        $sortDirection = $request->input('sort_direction', 'desc');
-
-        $allowedSorts = ['id', 'code', 'name', 'owner', 'contact_name', 'phone'];
-        if (!in_array($sortField, $allowedSorts)) {
-            $sortField = 'id';
-        }
-        if (!in_array(strtolower($sortDirection), ['asc', 'desc'])) {
-            $sortDirection = 'desc';
-        }
-
-        $perPage = $request->input('per_page', 10);
-
-        $vendors = $query->orderBy($sortField, $sortDirection)
-            ->paginate($perPage)
-            ->withQueryString();
-
-        return \Inertia\Inertia::render('Vendor/Index', [
-            'vendors' => $vendors,
-            'filters' => $request->only(['search', 'sort_field', 'sort_direction', 'per_page']),
-        ]);
-    }
-
-    /**
-     * Display the specified resource.
-     */
-    public function show(Vendor $vendor): \Inertia\Response
-    {
-        $vendor->load(['products.baseUnit', 'products.largeUnit']);
-        return \Inertia\Inertia::render('Vendor/Show', [
-            'vendor' => $vendor,
-            'products' => \App\Models\Product::with('baseUnit')->get(),
-        ]);
-    }
-
-    /**
-     * Store a newly created resource in storage.
-     */
-    public function store(\Illuminate\Http\Request $request)
-    {
-        $validated = $request->validate([
-            'name' => 'required|string|max:255',
-            'short_name' => 'nullable|string|max:255',
-            'tax_id' => 'nullable|string|max:8',
-            'owner' => 'nullable|string|max:255',
-            'contact_name' => 'nullable|string|max:255',
-            'tel' => 'nullable|string|max:50',
-            'phone' => 'nullable|string|max:50',
-            'email' => 'nullable|email|max:255',
-            'address' => 'nullable|string',
-            'remark' => 'nullable|string',
-        ]);
-
-        // Auto-generate code
-        $prefix = 'V';
-        $lastVendor = Vendor::latest('id')->first();
-        $nextId = $lastVendor ? $lastVendor->id + 1 : 1;
-        $code = $prefix . str_pad($nextId, 5, '0', STR_PAD_LEFT);
-
-        $validated['code'] = $code;
-        
-        Vendor::create($validated);
-
-        return redirect()->back()->with('success', '廠商已建立');
-    }
-
-    /**
-     * Update the specified resource in storage.
-     */
-    public function update(\Illuminate\Http\Request $request, Vendor $vendor)
-    {
-         $validated = $request->validate([
-            'name' => 'required|string|max:255',
-            'short_name' => 'nullable|string|max:255',
-            'tax_id' => 'nullable|string|max:8',
-            'owner' => 'nullable|string|max:255',
-            'contact_name' => 'nullable|string|max:255',
-            'tel' => 'nullable|string|max:50',
-            'phone' => 'nullable|string|max:50',
-            'email' => 'nullable|email|max:255',
-            'address' => 'nullable|string',
-            'remark' => 'nullable|string',
-        ]);
-
-        $vendor->update($validated);
-
-        return redirect()->back()->with('success', '廠商資料已更新');
-    }
-
-    /**
-     * Remove the specified resource from storage.
-     */
-    public function destroy(Vendor $vendor)
-    {
-        $vendor->delete();
-
-        return redirect()->back()->with('success', '廠商已刪除');
-    }
-}

app/Http/Controllers/VendorProductController.php

@@ -1,58 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use App\Models\Vendor;
-use Illuminate\Http\Request;
-use Illuminate\Support\Facades\Log;
-
-class VendorProductController extends Controller
-{
-    /**
-     * 新增供貨商品 (Attach)
-     */
-    public function store(Request $request, Vendor $vendor)
-    {
-        $validated = $request->validate([
-            'product_id' => 'required|exists:products,id',
-            'last_price' => 'nullable|numeric|min:0',
-        ]);
-
-        // 檢查是否已存在
-        if ($vendor->products()->where('product_id', $validated['product_id'])->exists()) {
-            return redirect()->back()->with('error', '該商品已在供貨清單中');
-        }
-
-        $vendor->products()->attach($validated['product_id'], [
-            'last_price' => $validated['last_price'] ?? null
-        ]);
-
-        return redirect()->back()->with('success', '供貨商品已新增');
-    }
-
-    /**
-     * 更新供貨商品資訊 (Update Pivot)
-     */
-    public function update(Request $request, Vendor $vendor, $productId)
-    {
-        $validated = $request->validate([
-            'last_price' => 'nullable|numeric|min:0',
-        ]);
-
-        $vendor->products()->updateExistingPivot($productId, [
-            'last_price' => $validated['last_price'] ?? null
-        ]);
-
-        return redirect()->back()->with('success', '供貨資訊已更新');
-    }
-
-    /**
-     * 移除供貨商品 (Detach)
-     */
-    public function destroy(Vendor $vendor, $productId)
-    {
-        $vendor->products()->detach($productId);
-
-        return redirect()->back()->with('success', '供貨商品已移除');
-    }
-}

app/Models/Category.php

@@ -1,30 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\HasMany;
-
-class Category extends Model
-{
-    use HasFactory;
-
-    protected $fillable = [
-        'name',
-        'description',
-        'is_active',
-    ];
-
-    protected $casts = [
-        'is_active' => 'boolean',
-    ];
-
-    /**
-     * Get the products for the category.
-     */
-    public function products(): HasMany
-    {
-        return $this->hasMany(Product::class);
-    }
-}

app/Models/Inventory.php

@@ -1,55 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-
-class Inventory extends Model
-{
-    /** @use HasFactory<\Database\Factories\InventoryFactory> */
-    use HasFactory;
-
-    protected $fillable = [
-        'warehouse_id',
-        'product_id',
-        'quantity',
-        'safety_stock',
-        'location',
-    ];
-
-    public function warehouse(): \Illuminate\Database\Eloquent\Relations\BelongsTo
-    {
-        return $this->belongsTo(Warehouse::class);
-    }
-
-    public function product(): \Illuminate\Database\Eloquent\Relations\BelongsTo
-    {
-        return $this->belongsTo(Product::class);
-    }
-
-    public function transactions(): \Illuminate\Database\Eloquent\Relations\HasMany
-    {
-        return $this->hasMany(InventoryTransaction::class);
-    }
-
-    public function lastOutgoingTransaction()
-    {
-        return $this->hasOne(InventoryTransaction::class)->ofMany([
-            'actual_time' => 'max',
-            'id' => 'max',
-        ], function ($query) {
-            $query->where('quantity', '<', 0);
-        });
-    }
-
-    public function lastIncomingTransaction()
-    {
-        return $this->hasOne(InventoryTransaction::class)->ofMany([
-            'actual_time' => 'max',
-            'id' => 'max',
-        ], function ($query) {
-            $query->where('quantity', '>', 0);
-        });
-    }
-}

app/Models/Product.php

@@ -1,69 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\SoftDeletes;
-use Illuminate\Database\Eloquent\Relations\BelongsTo;
-
-class Product extends Model
-{
-    use HasFactory, SoftDeletes;
-
-    protected $fillable = [
-        'code',
-        'name',
-        'category_id',
-        'brand',
-        'specification',
-        'base_unit_id',
-        'large_unit_id',
-        'conversion_rate',
-        'purchase_unit_id',
-    ];
-
-    protected $casts = [
-        'conversion_rate' => 'decimal:4',
-    ];
-
-    /**
-     * Get the category that owns the product.
-     */
-    public function category(): BelongsTo
-    {
-        return $this->belongsTo(Category::class);
-    }
-
-    public function baseUnit(): BelongsTo
-    {
-        return $this->belongsTo(Unit::class, 'base_unit_id');
-    }
-
-    public function largeUnit(): BelongsTo
-    {
-        return $this->belongsTo(Unit::class, 'large_unit_id');
-    }
-
-    public function purchaseUnit(): BelongsTo
-    {
-        return $this->belongsTo(Unit::class, 'purchase_unit_id');
-    }
-
-    public function vendors(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
-    {
-        return $this->belongsToMany(Vendor::class)->withPivot('last_price')->withTimestamps();
-    }
-
-    public function inventories(): \Illuminate\Database\Eloquent\Relations\HasMany
-    {
-        return $this->hasMany(Inventory::class);
-    }
-
-    public function warehouses(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
-    {
-        return $this->belongsToMany(Warehouse::class, 'inventories')
-            ->withPivot(['quantity', 'safety_stock', 'location'])
-            ->withTimestamps();
-    }
-}

app/Models/PurchaseOrder.php

@@ -1,128 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\BelongsTo;
-use Illuminate\Database\Eloquent\Relations\HasMany;
-
-class PurchaseOrder extends Model
-{
-    use HasFactory;
-
-    protected $fillable = [
-        'code',
-        'vendor_id',
-        'warehouse_id',
-        'user_id',
-        'status',
-        'expected_delivery_date',
-        'total_amount',
-        'tax_amount',
-        'grand_total',
-        'remark',
-        'invoice_number',
-        'invoice_date',
-        'invoice_amount',
-    ];
-
-    protected $casts = [
-        'expected_delivery_date' => 'date',
-        'invoice_date' => 'date',
-        'total_amount' => 'decimal:2',
-        'tax_amount' => 'decimal:2',
-        'grand_total' => 'decimal:2',
-        'invoice_amount' => 'decimal:2',
-    ];
-
-    protected $appends = [
-        'poNumber',
-        'supplierId',
-        'supplierName',
-        'expectedDate',
-        'totalAmount',
-        'createdBy',
-        'warehouse_name',
-        'createdAt',
-        'invoiceNumber',
-        'invoiceDate',
-        'invoiceAmount',
-    ];
-
-    public function getCreatedAtAttribute()
-    {
-        return $this->attributes['created_at'];
-    }
-
-    public function getPoNumberAttribute(): string
-    {
-        return $this->code;
-    }
-
-    public function getSupplierIdAttribute(): string
-    {
-        return (string) $this->vendor_id;
-    }
-
-    public function getSupplierNameAttribute(): string
-    {
-        return $this->vendor ? $this->vendor->name : '';
-    }
-
-    public function getExpectedDateAttribute(): ?string
-    {
-        return $this->expected_delivery_date ? $this->expected_delivery_date->format('Y-m-d') : null;
-    }
-
-    public function getTotalAmountAttribute(): float
-    {
-        return (float) ($this->attributes['total_amount'] ?? 0);
-    }
-
-    public function getCreatedByAttribute(): string
-    {
-        return $this->user ? $this->user->name : '系統';
-    }
-
-    public function getWarehouseNameAttribute(): string
-    {
-        return $this->warehouse ? $this->warehouse->name : '';
-    }
-
-    public function getInvoiceNumberAttribute(): ?string
-    {
-        return $this->attributes['invoice_number'] ?? null;
-    }
-
-    public function getInvoiceDateAttribute(): ?string
-    {
-        $date = $this->attributes['invoice_date'] ?? null;
-        return $date ? \Illuminate\Support\Carbon::parse($date)->format('Y-m-d') : null;
-    }
-
-    public function getInvoiceAmountAttribute(): ?float
-    {
-        return isset($this->attributes['invoice_amount']) ? (float) $this->attributes['invoice_amount'] : null;
-    }
-
-    public function vendor(): BelongsTo
-    {
-        return $this->belongsTo(Vendor::class);
-    }
-
-    public function warehouse(): BelongsTo
-    {
-        return $this->belongsTo(Warehouse::class);
-    }
-
-    public function user(): BelongsTo
-    {
-        return $this->belongsTo(User::class);
-    }
-
-    public function items(): HasMany
-    {
-        return $this->hasMany(PurchaseOrderItem::class);
-    }
-}

app/Models/PurchaseOrderItem.php

@@ -1,68 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\BelongsTo;
-
-class PurchaseOrderItem extends Model
-{
-    use HasFactory;
-
-    protected $fillable = [
-        'purchase_order_id',
-        'product_id',
-        'quantity',
-        'unit_id', // 新增單位ID欄位
-        'unit_price',
-        'subtotal',
-        'received_quantity',
-    ];
-
-    protected $casts = [
-        'quantity' => 'decimal:2',
-        'unit_price' => 'decimal:2',
-        'subtotal' => 'decimal:2',
-        'received_quantity' => 'decimal:2',
-    ];
-
-    public function getProductNameAttribute(): string
-    {
-        return $this->product?->name ?? '';
-    }
-    
-    // 關聯單位
-    public function unit(): \Illuminate\Database\Eloquent\Relations\BelongsTo
-    {
-        return $this->belongsTo(Unit::class);
-    }
-
-    public function getUnitNameAttribute(): string
-    {
-        // 優先使用關聯的 unit
-        if ($this->unit) {
-            return $this->unit->name;
-        }
-
-        if (!$this->product) {
-            return '';
-        }
-        
-        // Fallback: 嘗試從 Product 的關聯單位獲取
-        return $this->product->purchaseUnit?->name 
-            ?? $this->product->largeUnit?->name 
-            ?? $this->product->baseUnit?->name 
-            ?? '';
-    }
-
-    public function purchaseOrder(): BelongsTo
-    {
-        return $this->belongsTo(PurchaseOrder::class);
-    }
-
-    public function product(): BelongsTo
-    {
-        return $this->belongsTo(Product::class);
-    }
-}

app/Models/Unit.php

@@ -1,17 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-
-class Unit extends Model
-{
-    /** @use HasFactory<\Database\Factories\UnitFactory> */
-    use HasFactory;
-
-    protected $fillable = [
-        'name',
-        'code',
-    ];
-}

app/Models/User.php

@@ -1,50 +0,0 @@
-<?php
-
-namespace App\Models;
-
-// use Illuminate\Contracts\Auth\MustVerifyEmail;
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Foundation\Auth\User as Authenticatable;
-use Illuminate\Notifications\Notifiable;
-use Spatie\Permission\Traits\HasRoles;
-
-class User extends Authenticatable
-{
-    /** @use HasFactory<\Database\Factories\UserFactory> */
-    use HasFactory, Notifiable, HasRoles;
-
-    /**
-     * The attributes that are mass assignable.
-     *
-     * @var list<string>
-     */
-    protected $fillable = [
-        'name',
-        'email',
-        'username',
-        'password',
-    ];
-
-    /**
-     * The attributes that should be hidden for serialization.
-     *
-     * @var list<string>
-     */
-    protected $hidden = [
-        'password',
-        'remember_token',
-    ];
-
-    /**
-     * Get the attributes that should be cast.
-     *
-     * @return array<string, string>
-     */
-    protected function casts(): array
-    {
-        return [
-            'email_verified_at' => 'datetime',
-            'password' => 'hashed',
-        ];
-    }
-}

app/Models/Vendor.php

@@ -1,35 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\BelongsToMany;
-use Illuminate\Database\Eloquent\Relations\HasMany;
-
-class Vendor extends Model
-{
-    protected $fillable = [
-        'code',
-        'name',
-        'short_name',
-        'tax_id',
-        'owner',
-        'contact_name',
-        'tel',
-        'phone',
-        'email',
-        'address',
-        'remark'
-    ];
-    public function products(): BelongsToMany
-    {
-        return $this->belongsToMany(Product::class, 'product_vendor')
-                    ->withPivot('last_price')
-                    ->withTimestamps();
-    }
-
-    public function purchaseOrders(): HasMany
-    {
-        return $this->hasMany(PurchaseOrder::class);
-    }
-}

app/Models/Warehouse.php

@@ -1,36 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-
-class Warehouse extends Model
-{
-    /** @use HasFactory<\Database\Factories\WarehouseFactory> */
-    use HasFactory;
-
-    protected $fillable = [
-        'code',
-        'name',
-        'address',
-        'description',
-    ];
-
-    public function inventories(): \Illuminate\Database\Eloquent\Relations\HasMany
-    {
-        return $this->hasMany(Inventory::class);
-    }
-
-    public function purchaseOrders(): \Illuminate\Database\Eloquent\Relations\HasMany
-    {
-        return $this->hasMany(PurchaseOrder::class);
-    }
-
-    public function products(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
-    {
-        return $this->belongsToMany(Product::class, 'inventories')
-            ->withPivot(['quantity', 'safety_stock', 'location'])
-            ->withTimestamps();
-    }
-}

app/Modules/Core/Contracts/CoreServiceInterface.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Modules\Core\Contracts;
+
+use Illuminate\Support\Collection;
+
+interface CoreServiceInterface
+{
+    /**
+     * Get multiple users by their IDs.
+     * 
+     * @param array $ids
+     * @return Collection
+     */
+    public function getUsersByIds(array $ids): Collection;
+
+    /**
+     * Get a specific user by ID.
+     * 
+     * @param int $id
+     * @return object|null
+     */
+    public function getUser(int $id): ?object;
+
+    /**
+     * Get all users.
+     * 
+     * @return Collection
+     */
+    public function getAllUsers(): Collection;
+
+    /**
+     * Get the system user or create one if not exists.
+     * 
+     * @return object
+     */
+    public function ensureSystemUserExists();
+}

app/Modules/Core/Controllers/ActivityLogController.php

@@ -0,0 +1,127 @@
+<?php
+
+namespace App\Modules\Core\Controllers;
+
+use App\Http\Controllers\Controller;
+
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Spatie\Activitylog\Models\Activity;
+
+class ActivityLogController extends Controller
+{
+    private function getSubjectMap()
+    {
+        return [
+            'App\Modules\Core\Models\User' => '使用者',
+            'App\Modules\Core\Models\Role' => '角色',
+            'App\Modules\Inventory\Models\Product' => '商品',
+            'App\Modules\Procurement\Models\Vendor' => '廠商',
+            'App\Modules\Inventory\Models\Category' => '商品分類',
+            'App\Modules\Inventory\Models\Unit' => '單位',
+            'App\Modules\Procurement\Models\PurchaseOrder' => '採購單',
+            'App\Modules\Inventory\Models\Warehouse' => '倉庫',
+            'App\Modules\Inventory\Models\Inventory' => '庫存',
+            'App\Modules\Finance\Models\UtilityFee' => '公共事業費',
+        ];
+    }
+
+    public function index(Request $request)
+    {
+        $perPage = $request->input('per_page', 10);
+        $sortBy = $request->input('sort_by', 'created_at');
+        $sortOrder = $request->input('sort_order', 'desc');
+
+        $search = $request->input('search');
+        $dateStart = $request->input('date_start');
+        $dateEnd = $request->input('date_end');
+        $event = $request->input('event');
+        $subjectType = $request->input('subject_type');
+        $causerId = $request->input('causer_id');
+
+        $query = Activity::with('causer');
+
+        if ($search) {
+            $query->where(function ($q) use ($search) {
+                $q->where('description', 'like', "%{$search}%")
+                    ->orWhere('log_name', 'like', "%{$search}%")
+                    ->orWhere('properties', 'like', "%{$search}%");
+            });
+        }
+
+        if ($dateStart) {
+            $query->whereDate('created_at', '>=', $dateStart);
+        }
+
+        if ($dateEnd) {
+            $query->whereDate('created_at', '<=', $dateEnd);
+        }
+
+        if ($event) {
+            $query->where('event', $event);
+        }
+
+        if ($subjectType) {
+            $query->where('subject_type', $subjectType);
+        }
+
+        if ($causerId) {
+            $query->where('causer_id', $causerId);
+        }
+
+        if ($sortBy === 'created_at') {
+            $query->orderBy($sortBy, $sortOrder);
+        } else {
+            $query->latest();
+        }
+
+        $activities = $query->paginate($perPage)
+            ->through(function ($activity) {
+        $subjectMap = $this->getSubjectMap();
+
+                $eventMap = [
+                    'created' => '新增',
+                    'updated' => '更新',
+                    'deleted' => '刪除',
+                ];
+
+                return [
+                    'id' => $activity->id,
+                    'description' => $eventMap[$activity->event] ?? $activity->event,
+                    'subject_type' => $subjectMap[$activity->subject_type] ?? class_basename($activity->subject_type),
+                    'event' => $activity->event,
+                    'causer' => $activity->causer ? $activity->causer->name : 'System',
+                    'created_at' => $activity->created_at->format('Y-m-d H:i:s'),
+                    'properties' => $activity->properties,
+                ];
+            });
+
+        // 準備用於前端篩選的主題類型
+        $subjectTypes = collect($this->getSubjectMap())->map(function ($label, $value) {
+            return ['label' => $label, 'value' => $value];
+        })->values();
+
+        // 取得用於操作者篩選的使用者
+        $users = \App\Modules\Core\Models\User::select('id', 'name')->orderBy('name')->get()
+            ->map(function ($user) {
+                return ['label' => $user->name, 'value' => (string) $user->id];
+            });
+
+        return Inertia::render('Admin/ActivityLog/Index', [
+            'activities' => $activities,
+            'filters' => [
+                'per_page' => $request->input('per_page', '10'),
+                'sort_by' => $request->input('sort_by'),
+                'sort_order' => $request->input('sort_order'),
+                'search' => $request->input('search'),
+                'date_start' => $request->input('date_start'),
+                'date_end' => $request->input('date_end'),
+                'event' => $request->input('event'),
+                'subject_type' => $request->input('subject_type'),
+                'causer_id' => $request->input('causer_id'),
+            ],
+            'subject_types' => $subjectTypes,
+            'users' => $users,
+        ]);
+    }
+}

app/Modules/Core/Controllers/Auth/LoginController.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace App\Http\Controllers\Auth;
+namespace App\Modules\Core\Controllers\Auth;
 
 use App\Http\Controllers\Controller;
 use Illuminate\Http\Request;

app/Modules/Core/Controllers/DashboardController.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Modules\Core\Controllers;
+
+use App\Http\Controllers\Controller;
+
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Procurement\Contracts\ProcurementServiceInterface;
+use Inertia\Inertia;
+use Illuminate\Http\Request;
+
+class DashboardController extends Controller
+{
+    protected $inventoryService;
+    protected $procurementService;
+
+    public function __construct(
+        InventoryServiceInterface $inventoryService,
+        ProcurementServiceInterface $procurementService
+    ) {
+        $this->inventoryService = $inventoryService;
+        $this->procurementService = $procurementService;
+    }
+
+    public function index()
+    {
+        $centralDomains = config('tenancy.central_domains', []);
+
+        $demoPort = config('tenancy.demo_tenant_port');
+        if ((!$demoPort || request()->getPort() != $demoPort) && in_array(request()->getHost(), $centralDomains)) {
+            return redirect()->route('landlord.dashboard');
+        }
+
+        $invStats = $this->inventoryService->getDashboardStats();
+        $procStats = $this->procurementService->getDashboardStats();
+
+        $stats = [
+            'productsCount' => $invStats['productsCount'],
+            'vendorsCount' => $procStats['vendorsCount'],
+            'purchaseOrdersCount' => $procStats['purchaseOrdersCount'],
+            'warehousesCount' => $invStats['warehousesCount'],
+            'totalInventoryValue' => $invStats['totalInventoryQuantity'], // 原本前端命名是 totalInventoryValue 但實作是 Quantity，暫且保留欄位名以不破壞前端
+            'pendingOrdersCount' => $procStats['pendingOrdersCount'],
+            'lowStockCount' => $invStats['lowStockCount'],
+        ];
+
+        return Inertia::render('Dashboard', [
+            'stats' => $stats,
+        ]);
+    }
+}

app/Modules/Core/Controllers/ProfileController.php

@@ -1,8 +1,9 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Core\Controllers;
+
+use App\Http\Controllers\Controller;
 
-use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Hash;
 use Illuminate\Validation\Rules\Password;
 use Inertia\Inertia;

app/Modules/Core/Controllers/RoleController.php

@@ -1,8 +1,9 @@
 <?php
 
-namespace App\Http\Controllers\Admin;
+namespace App\Modules\Core\Controllers;
 
 use App\Http\Controllers\Controller;
+
 use Illuminate\Http\Request;
 use Spatie\Permission\Models\Role;
 use Spatie\Permission\Models\Permission;
@@ -12,22 +13,33 @@ use Illuminate\Validation\Rule;
 class RoleController extends Controller
 {
     /**
-     * Display a listing of the resource.
+     * 顯示資源列表。
      */
-    public function index()
+    public function index(Request $request)
     {
-        $roles = Role::withCount('users', 'permissions')
-            ->with('users:id,name,username')
-            ->orderBy('id')
-            ->get();
+        $sortBy = $request->input('sort_by', 'id');
+        $sortOrder = $request->input('sort_order', 'asc');
+
+        $query = Role::withCount('users', 'permissions')
+            ->with('users:id,name,username');
+
+        // 處理排序
+        if (in_array($sortBy, ['users_count', 'permissions_count', 'created_at', 'id'])) {
+           $query->orderBy($sortBy, $sortOrder);
+        } else {
+           $query->orderBy('id', 'asc');
+        }
+
+        $roles = $query->get();
 
         return Inertia::render('Admin/Role/Index', [
-            'roles' => $roles
+            'roles' => $roles,
+            'filters' => $request->only(['sort_by', 'sort_order']),
         ]);
     }
 
     /**
-     * Show the form for creating a new resource.
+     * 顯示建立新資源的表單。
      */
     public function create()
     {
@@ -39,7 +51,7 @@ class RoleController extends Controller
     }
 
     /**
-     * Store a newly created resource in storage.
+     * 將新建立的資源儲存到儲存體中。
      */
     public function store(Request $request)
     {
@@ -63,7 +75,7 @@ class RoleController extends Controller
     }
 
     /**
-     * Show the form for editing the specified resource.
+     * 顯示編輯指定資源的表單。
      */
     public function edit(string $id)
     {
@@ -85,7 +97,7 @@ class RoleController extends Controller
     }
 
     /**
-     * Update the specified resource in storage.
+     * 更新儲存體中的指定資源。
      */
     public function update(Request $request, string $id)
     {
@@ -115,7 +127,7 @@ class RoleController extends Controller
     }
 
     /**
-     * Remove the specified resource from storage.
+     * 從儲存體中移除指定資源。
      */
     public function destroy(string $id)
     {
@@ -168,6 +180,8 @@ class RoleController extends Controller
             'purchase_orders' => '採購單管理',
             'users' => '使用者管理',
             'roles' => '角色與權限',
+            'utility_fees' => '公共事業費管理',
+            'accounting' => '會計報表',
         ];
 
         $result = [];

app/Modules/Core/Controllers/UserController.php

@@ -0,0 +1,245 @@
+<?php
+
+namespace App\Modules\Core\Controllers;
+
+use App\Http\Controllers\Controller;
+
+use App\Modules\Core\Models\User;
+use Illuminate\Http\Request;
+use Spatie\Permission\Models\Role;
+use Inertia\Inertia;
+use Illuminate\Validation\Rule;
+use Illuminate\Support\Facades\Hash;
+
+class UserController extends Controller
+{
+    /**
+     * 顯示資源列表。
+     */
+    public function index(Request $request)
+    {
+        $perPage = $request->input('per_page', 10);
+        $sortBy = $request->input('sort_by', 'id');
+        $sortOrder = $request->input('sort_order', 'asc');
+        $search = $request->input('search');
+        $roleId = $request->input('role');
+
+        $query = User::with(['roles:id,name,display_name']);
+
+        // 處理搜尋
+        if ($search) {
+            $query->where(function ($q) use ($search) {
+                $q->where('name', 'like', "%{$search}%")
+                  ->orWhere('email', 'like', "%{$search}%")
+                  ->orWhere('username', 'like', "%{$search}%");
+            });
+        }
+
+        // 處理角色篩選
+        if ($roleId && $roleId !== 'all') {
+            $query->whereHas('roles', function ($q) use ($roleId) {
+                $q->where('id', $roleId);
+            });
+        }
+
+         // 處理排序
+        if (in_array($sortBy, ['name', 'created_at'])) {
+           $query->orderBy($sortBy, $sortOrder);
+        } else {
+           $query->orderBy('id', 'asc');
+        }
+
+        $users = $query->paginate($perPage)->withQueryString();
+        $roles = Role::select('id', 'name', 'display_name')->get();
+
+        return Inertia::render('Admin/User/Index', [
+            'users' => $users,
+            'roles' => $roles,
+            'filters' => $request->only(['per_page', 'sort_by', 'sort_order', 'search', 'role']),
+        ]);
+    }
+
+    /**
+     * 顯示建立新資源的表單。
+     */
+    public function create()
+    {
+        $roles = Role::pluck('display_name', 'name');
+
+        return Inertia::render('Admin/User/Create', [
+            'roles' => $roles
+        ]);
+    }
+
+    /**
+     * 將新建立的資源儲存到儲存體中。
+     */
+    public function store(Request $request)
+    {
+        $validated = $request->validate([
+            'name' => ['required', 'string', 'max:255'],
+            'email' => ['nullable', 'string', 'email', 'max:255', 'unique:users'],
+            'username' => ['required', 'string', 'max:255', 'unique:users'],
+            'password' => ['required', 'string', 'min:8', 'confirmed'],
+            'roles' => ['array'], 
+        ], [
+            'password.required' => '請輸入密碼',
+            'password.min' => '密碼長度至少需 :min 個字元',
+            'password.confirmed' => '密碼確認不符',
+        ]);
+
+        $user = User::create([
+            'name' => $validated['name'],
+            'email' => $validated['email'],
+            'username' => $validated['username'],
+            'password' => Hash::make($validated['password']),
+        ]);
+
+        if (!empty($validated['roles'])) {
+            $user->syncRoles($validated['roles']);
+
+            // 更新 'created' 紀錄以包含角色資訊
+            $activity = \Spatie\Activitylog\Models\Activity::where('subject_type', get_class($user))
+                ->where('subject_id', $user->id)
+                ->where('event', 'created')
+                ->latest()
+                ->first();
+
+            if ($activity) {
+                $roleNames = $user->roles()->pluck('display_name')->join(', ');
+                $properties = $activity->properties->toArray();
+                $properties['attributes']['role_id'] = $roleNames;
+                $activity->properties = $properties;
+                $activity->save();
+            }
+        }
+
+        return redirect()->route('users.index')->with('success', '使用者建立成功');
+    }
+
+    /**
+     * 顯示編輯指定資源的表單。
+     */
+    public function edit(string $id)
+    {
+        $user = User::with('roles')->findOrFail($id);
+        $roles = Role::get(['id', 'name', 'display_name']); 
+
+        return Inertia::render('Admin/User/Edit', [
+            'user' => $user,
+            'roles' => $roles,
+            'currentRoles' => $user->getRoleNames()
+        ]);
+    }
+
+    /**
+     * 更新儲存體中的指定資源。
+     */
+    public function update(Request $request, string $id)
+    {
+        $user = User::findOrFail($id);
+        
+        $validated = $request->validate([
+            'name' => ['required', 'string', 'max:255'],
+            'email' => ['nullable', 'string', 'email', 'max:255', Rule::unique('users')->ignore($user->id)],
+            'username' => ['required', 'string', 'max:255', Rule::unique('users')->ignore($user->id)],
+            'password' => ['nullable', 'string', 'min:8', 'confirmed'],
+            'roles' => ['array'],
+        ], [
+            'password.min' => '密碼長度至少需 :min 個字元',
+            'password.confirmed' => '密碼確認不符',
+        ]);
+
+        // 1. 準備資料並偵測變更
+        $userData = [
+            'name' => $validated['name'],
+            'email' => $validated['email'],
+            'username' => $validated['username'],
+        ];
+
+        if (!empty($validated['password'])) {
+            $userData['password'] = Hash::make($validated['password']);
+        }
+
+        $user->fill($userData);
+
+        // 捕捉變更屬性以進行手動記錄
+        $dirty = $user->getDirty();
+        $oldAttributes = [];
+        $newAttributes = [];
+
+        foreach ($dirty as $key => $value) {
+            $oldAttributes[$key] = $user->getOriginal($key);
+            $newAttributes[$key] = $value;
+        }
+
+        // 儲存但不觸發事件（防止重複記錄）
+        $user->saveQuietly();
+
+        // 2. 處理角色
+        $roleChanges = null;
+        if (isset($validated['roles'])) {
+            $oldRoles = $user->roles()->pluck('display_name')->join(', ');
+            $user->syncRoles($validated['roles']);
+            $newRoles = $user->roles()->pluck('display_name')->join(', ');
+
+            if ($oldRoles !== $newRoles) {
+                $roleChanges = [
+                    'old' => $oldRoles,
+                    'new' => $newRoles
+                ];
+            }
+        }
+
+        // 3. 手動記錄活動（單一整合記錄）
+        if (!empty($newAttributes) || $roleChanges) {
+            $properties = [
+                'attributes' => $newAttributes,
+                'old' => $oldAttributes,
+            ];
+
+            if ($roleChanges) {
+                $properties['attributes']['role_id'] = $roleChanges['new'];
+                $properties['old']['role_id'] = $roleChanges['old'];
+            }
+
+            activity()
+                ->performedOn($user)
+                ->causedBy(auth()->user())
+                ->event('updated')
+                ->withProperties($properties)
+                ->tap(function (\Spatie\Activitylog\Contracts\Activity $activity) use ($user) {
+                    // 手動加入快照，因為使用 saveQuietly 所以不使用模型的 LogOptions
+                    $activity->properties = $activity->properties->merge([
+                        'snapshot' => [
+                            'name' => $user->name,
+                            'username' => $user->username,
+                        ]
+                    ]);
+                })
+                ->log('updated');
+        }
+
+        return redirect()->route('users.index')->with('success', '使用者更新成功');
+    }
+
+    /**
+     * 從儲存體中移除指定資源。
+     */
+    public function destroy(string $id)
+    {
+        $user = User::findOrFail($id);
+
+        if ($user->hasRole('super-admin')) {
+             return back()->with('error', '無法刪除超級管理員帳號');
+        }
+        
+        if ($user->id === auth()->id()) {
+            return back()->with('error', '無法刪除自己');
+        }
+
+        $user->delete();
+
+        return redirect()->route('users.index')->with('success', '使用者已刪除');
+    }
+}

app/Modules/Core/CoreServiceProvider.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Modules\Core;
+
+use Illuminate\Support\ServiceProvider;
+use App\Modules\Core\Contracts\CoreServiceInterface;
+use App\Modules\Core\Services\CoreService;
+
+class CoreServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        $this->app->bind(CoreServiceInterface::class, CoreService::class);
+    }
+
+    public function boot(): void
+    {
+        //
+    }
+}

app/Modules/Core/Models/Role.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Modules\Core\Models;
+
+use Spatie\Permission\Models\Role as SpatieRole;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class Role extends SpatieRole
+{
+    use LogsActivity;
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+}

app/Modules/Core/Models/Tenant.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace App\Models;
+namespace App\Modules\Core\Models;
 
 use Stancl\Tenancy\Database\Models\Tenant as BaseTenant;
 use Stancl\Tenancy\Contracts\TenantWithDatabase;

app/Modules/Core/Models/User.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace App\Modules\Core\Models;
+
+// use Illuminate\Contracts\Auth\MustVerifyEmail;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Foundation\Auth\User as Authenticatable;
+use Illuminate\Notifications\Notifiable;
+use Spatie\Permission\Traits\HasRoles;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class User extends Authenticatable
+{
+    /** @use HasFactory<\Database\Factories\UserFactory> */
+    use HasFactory, Notifiable, HasRoles, LogsActivity;
+
+    /**
+     * 可批量賦值的屬性。
+     *
+     * @var list<string>
+     */
+    /**
+     * 建立模型的新工廠實例。
+     *
+     * @return \Illuminate\Database\Eloquent\Factories\Factory
+     */
+    protected static function newFactory()
+    {
+        return \Database\Factories\UserFactory::new();
+    }
+
+    protected $fillable = [
+        'name',
+        'email',
+        'username',
+        'password',
+    ];
+
+    /**
+     * 序列化時應隱藏的屬性。
+     *
+     * @var list<string>
+     */
+    protected $hidden = [
+        'password',
+        'remember_token',
+    ];
+
+    /**
+     * 取得應進行轉換的屬性。
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'email_verified_at' => 'datetime',
+            'password' => 'hashed',
+        ];
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $activity->properties = $activity->properties->merge([
+            'snapshot' => [
+                'name' => $this->name,
+                'username' => $this->username,
+            ]
+        ]);
+    }
+}

app/Modules/Core/Routes/web.php

@@ -0,0 +1,54 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Modules\Core\Controllers\Auth\LoginController;
+use App\Modules\Core\Controllers\DashboardController;
+use App\Modules\Core\Controllers\ProfileController;
+use App\Modules\Core\Controllers\RoleController;
+use App\Modules\Core\Controllers\UserController;
+use App\Modules\Core\Controllers\ActivityLogController;
+
+// 登入/登出路由
+Route::get('/login', [LoginController::class, 'show'])->name('login');
+Route::post('/login', [LoginController::class, 'store']);
+Route::post('/logout', [LoginController::class, 'destroy'])->name('logout');
+
+Route::middleware('auth')->group(function () {
+    // 儀表板 - 所有登入使用者皆可存取
+    Route::get('/', [DashboardController::class, 'index'])->name('dashboard');
+
+    // 使用者帳號設定
+    Route::get('/profile', [ProfileController::class, 'edit'])->name('profile.edit');
+    Route::patch('/profile', [ProfileController::class, 'update'])->name('profile.update');
+    Route::put('/profile/password', [ProfileController::class, 'updatePassword'])->name('profile.password');
+
+    // 系統管理
+    Route::prefix('admin')->group(function () {
+        Route::middleware('permission:roles.view')->group(function () {
+            Route::get('/roles', [RoleController::class, 'index'])->name('roles.index');
+            Route::middleware('permission:roles.create')->group(function () {
+                Route::get('/roles/create', [RoleController::class, 'create'])->name('roles.create');
+                Route::post('/roles', [RoleController::class, 'store'])->name('roles.store');
+            });
+            Route::get('/roles/{role}/edit', [RoleController::class, 'edit'])->middleware('permission:roles.edit')->name('roles.edit');
+            Route::put('/roles/{role}', [RoleController::class, 'update'])->middleware('permission:roles.edit')->name('roles.update');
+            Route::delete('/roles/{role}', [RoleController::class, 'destroy'])->middleware('permission:roles.delete')->name('roles.destroy');
+        });
+        
+        Route::middleware('permission:users.view')->group(function () {
+            Route::get('/users', [UserController::class, 'index'])->name('users.index');
+            Route::middleware('permission:users.create')->group(function () {
+                Route::get('/users/create', [UserController::class, 'create'])->name('users.create');
+                Route::post('/users', [UserController::class, 'store'])->name('users.store');
+            });
+            Route::get('/users/{user}/edit', [UserController::class, 'edit'])->middleware('permission:users.edit')->name('users.edit');
+            Route::put('/users/{user}', [UserController::class, 'update'])->middleware('permission:users.edit')->name('users.update');
+            Route::delete('/users/{user}', [UserController::class, 'destroy'])->middleware('permission:users.delete')->name('users.destroy');
+        });
+
+        Route::middleware('permission:system.view_logs')->group(function () {
+            Route::get('/activity-logs', [ActivityLogController::class, 'index'])->name('activity-logs.index');
+        });
+
+    });
+});

app/Modules/Core/Services/CoreService.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Modules\Core\Services;
+
+use App\Modules\Core\Contracts\CoreServiceInterface;
+use App\Modules\Core\Models\User;
+use Illuminate\Support\Collection;
+
+class CoreService implements CoreServiceInterface
+{
+    /**
+     * Get multiple users by their IDs.
+     * 
+     * @param array $ids
+     * @return Collection
+     */
+    public function getUsersByIds(array $ids): Collection
+    {
+        return User::whereIn('id', $ids)->get();
+    }
+
+    /**
+     * Get a specific user by ID.
+     * 
+     * @param int $id
+     * @return object|null
+     */
+    public function getUser(int $id): ?object
+    {
+        return User::find($id);
+    }
+
+    /**
+     * Get all users.
+     * 
+     * @return Collection
+     */
+    public function getAllUsers(): Collection
+    {
+        return User::all();
+    }
+
+    public function ensureSystemUserExists()
+    {
+        $user = User::first();
+        if (!$user) {
+            $user = User::create([
+                'name' => '系統管理員',
+                'email' => 'admin@example.com',
+                'password' => bcrypt('password'),
+            ]);
+        }
+        return $user;
+    }
+}

app/Modules/Finance/Contracts/FinanceServiceInterface.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Modules\Finance\Contracts;
+
+use Illuminate\Support\Collection;
+
+interface FinanceServiceInterface
+{
+    /**
+     * Get accounting report data.
+     * 
+     * @param string $start
+     * @param string $end
+     * @return array
+     */
+    public function getAccountingReportData(string $start, string $end): array;
+
+    /**
+     * Get all utility fees with filters.
+     * 
+     * @param array $filters
+     * @return mixed
+     */
+    public function getUtilityFees(array $filters);
+
+    /**
+     * Get unique categories of utility fees.
+     * 
+     * @return Collection
+     */
+    public function getUniqueCategories(): Collection;
+}

app/Modules/Finance/Controllers/AccountingReportController.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace App\Modules\Finance\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Finance\Contracts\FinanceServiceInterface;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Illuminate\Support\Carbon;
+use Illuminate\Pagination\LengthAwarePaginator;
+
+class AccountingReportController extends Controller
+{
+    protected $financeService;
+
+    public function __construct(FinanceServiceInterface $financeService)
+    {
+        $this->financeService = $financeService;
+    }
+
+    public function index(Request $request)
+    {
+        $dateStart = $request->input('date_start', Carbon::now()->toDateString());
+        $dateEnd = $request->input('date_end', Carbon::now()->toDateString());
+
+        $reportData = $this->financeService->getAccountingReportData($dateStart, $dateEnd);
+        $allRecords = $reportData['records'];
+
+        // 3. Manual Pagination
+        $perPage = $request->input('per_page', 10);
+        $page = $request->input('page', 1);
+        $offset = ($page - 1) * $perPage;
+
+        $paginatedRecords = new LengthAwarePaginator(
+            $allRecords->slice($offset, $perPage)->values(),
+            $allRecords->count(),
+            $perPage,
+            $page,
+            ['path' => $request->url(), 'query' => $request->query()]
+        );
+
+        return Inertia::render('Accounting/Report', [
+            'records' => $paginatedRecords,
+            'summary' => $reportData['summary'],
+            'filters' => [
+                'date_start' => $dateStart,
+                'date_end' => $dateEnd,
+                'per_page' => (int)$perPage,
+            ],
+        ]);
+    }
+
+    public function export(Request $request)
+    {
+        $dateStart = $request->input('date_start', Carbon::now()->toDateString());
+        $dateEnd = $request->input('date_end', Carbon::now()->toDateString());
+        $selectedIdsParam = $request->input('selected_ids');
+
+        $reportData = $this->financeService->getAccountingReportData($dateStart, $dateEnd);
+        $allRecords = $reportData['records'];
+
+        if ($selectedIdsParam) {
+            $ids = explode(',', $selectedIdsParam);
+            $allRecords = $allRecords->whereIn('id', $ids);
+        }
+
+        $exportData = $allRecords->map(function ($record) {
+            return [
+                $record['date'],
+                $record['source'],
+                $record['category'],
+                $record['item'],
+                $record['reference'],
+                $record['invoice_number'],
+                $record['amount'],
+            ];
+        });
+
+        $filename = "accounting_report_{$dateStart}_{$dateEnd}.csv";
+        $headers = [
+            'Content-Type' => 'text/csv; charset=UTF-8',
+            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
+        ];
+
+        $callback = function () use ($exportData) {
+            $file = fopen('php://output', 'w');
+            // BOM for Excel compatibility with UTF-8
+            fprintf($file, chr(0xEF).chr(0xBB).chr(0xBF));
+            
+            fputcsv($file, ['日期', '來源', '類別', '項目', '參考單號', '發票號碼', '金額']);
+
+            foreach ($exportData as $row) {
+                fputcsv($file, $row);
+            }
+            fclose($file);
+        };
+
+        return response()->stream($callback, 200, $headers);
+    }
+}

app/Modules/Finance/Controllers/UtilityFeeController.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace App\Modules\Finance\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Finance\Models\UtilityFee;
+use App\Modules\Finance\Contracts\FinanceServiceInterface;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+
+class UtilityFeeController extends Controller
+{
+    protected $financeService;
+
+    public function __construct(FinanceServiceInterface $financeService)
+    {
+        $this->financeService = $financeService;
+    }
+
+    public function index(Request $request)
+    {
+        $filters = $request->only(['search', 'category', 'date_start', 'date_end', 'sort_field', 'sort_direction', 'per_page']);
+        
+        $fees = $this->financeService->getUtilityFees($filters)->withQueryString();
+        $availableCategories = $this->financeService->getUniqueCategories();
+
+        return Inertia::render('UtilityFee/Index', [
+            'fees' => $fees,
+            'availableCategories' => $availableCategories,
+            'filters' => $filters,
+        ]);
+    }
+
+    public function store(Request $request)
+    {
+        $validated = $request->validate([
+            'transaction_date' => 'required|date',
+            'category' => 'required|string|max:255',
+            'amount' => 'required|numeric|min:0',
+            'invoice_number' => 'nullable|string|max:255',
+            'description' => 'nullable|string',
+        ]);
+
+        $fee = UtilityFee::create($validated);
+
+        activity()
+            ->performedOn($fee)
+            ->causedBy(auth()->user())
+            ->event('created')
+            ->log('created');
+
+        return redirect()->back();
+    }
+
+    public function update(Request $request, UtilityFee $utility_fee)
+    {
+        $validated = $request->validate([
+            'transaction_date' => 'required|date',
+            'category' => 'required|string|max:255',
+            'amount' => 'required|numeric|min:0',
+            'invoice_number' => 'nullable|string|max:255',
+            'description' => 'nullable|string',
+        ]);
+
+        $utility_fee->update($validated);
+
+        activity()
+            ->performedOn($utility_fee)
+            ->causedBy(auth()->user())
+            ->event('updated')
+            ->log('updated');
+
+        return redirect()->back();
+    }
+
+    public function destroy(UtilityFee $utility_fee)
+    {
+        activity()
+            ->performedOn($utility_fee)
+            ->causedBy(auth()->user())
+            ->event('deleted')
+            ->log('deleted');
+
+        $utility_fee->delete();
+        
+        return redirect()->back();
+    }
+}

app/Modules/Finance/FinanceServiceProvider.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Modules\Finance;
+
+use Illuminate\Support\ServiceProvider;
+use App\Modules\Finance\Contracts\FinanceServiceInterface;
+use App\Modules\Finance\Services\FinanceService;
+
+class FinanceServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        $this->app->bind(FinanceServiceInterface::class, FinanceService::class);
+    }
+
+    public function boot(): void
+    {
+        //
+    }
+}

app/Modules/Finance/Models/UtilityFee.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Modules\Finance\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class UtilityFee extends Model
+{
+    /** @use HasFactory<\Database\Factories\UtilityFeeFactory> */
+    use HasFactory;
+
+    protected $fillable = [
+        'transaction_date',
+        'category',
+        'amount',
+        'invoice_number',
+        'description',
+    ];
+
+    protected $casts = [
+        'transaction_date' => 'date',
+        'amount' => 'decimal:2',
+    ];
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $activity->properties = $activity->properties->put('snapshot', [
+            'transaction_date' => $this->transaction_date->format('Y-m-d'),
+            'category' => $this->category,
+            'amount' => $this->amount,
+            'invoice_number' => $this->invoice_number,
+        ]);
+    }
+}

app/Modules/Finance/Routes/web.php

@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Modules\Finance\Controllers\UtilityFeeController;
+use App\Modules\Finance\Controllers\AccountingReportController;
+
+Route::middleware('auth')->group(function () {
+    // 公共事業費管理
+    Route::middleware('permission:utility_fees.view')->group(function () {
+        Route::get('/utility-fees', [UtilityFeeController::class, 'index'])->name('utility-fees.index');
+    });
+    Route::middleware('permission:utility_fees.create')->group(function () {
+        Route::post('/utility-fees', [UtilityFeeController::class, 'store'])->name('utility-fees.store');
+    });
+    Route::middleware('permission:utility_fees.edit')->group(function () {
+        Route::put('/utility-fees/{utility_fee}', [UtilityFeeController::class, 'update'])->name('utility-fees.update');
+    });
+    Route::middleware('permission:utility_fees.delete')->group(function () {
+        Route::delete('/utility-fees/{utility_fee}', [UtilityFeeController::class, 'destroy'])->name('utility-fees.destroy');
+    });
+
+    // 會計報表
+    Route::middleware('permission:accounting.view')->prefix('accounting-report')->group(function () {
+        Route::get('/', [AccountingReportController::class, 'index'])->name('accounting.report');
+        Route::get('/export', [AccountingReportController::class, 'export'])
+            ->middleware('permission:accounting.export')
+            ->name('accounting.export');
+    });
+});

app/Modules/Finance/Services/FinanceService.php

@@ -0,0 +1,104 @@
+<?php
+
+namespace App\Modules\Finance\Services;
+
+use App\Modules\Finance\Contracts\FinanceServiceInterface;
+use App\Modules\Finance\Models\UtilityFee;
+use App\Modules\Procurement\Contracts\ProcurementServiceInterface;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Carbon;
+
+class FinanceService implements FinanceServiceInterface
+{
+    protected $procurementService;
+
+    public function __construct(ProcurementServiceInterface $procurementService)
+    {
+        $this->procurementService = $procurementService;
+    }
+
+    public function getAccountingReportData(string $start, string $end): array
+    {
+        // 1. 獲取採購單資料
+        $purchaseOrders = $this->procurementService->getPurchaseOrdersByDate($start, $end)
+            ->map(function ($po) {
+                return [
+                    'id' => 'PO-' . $po->id,
+                    'date' => Carbon::parse($po->created_at)->timezone(config('app.timezone'))->toDateString(),
+                    'source' => '採購單',
+                    'category' => '進貨支出',
+                    'item' => $po->vendor->name ?? '未知廠商',
+                    'reference' => $po->code,
+                    'invoice_number' => $po->invoice_number,
+                    'amount' => (float)$po->grand_total,
+                ];
+            });
+
+        // 2. 獲取公共事業費 (注意：目前資料表欄位為 transaction_date)
+        $utilityFees = UtilityFee::whereBetween('transaction_date', [$start, $end])
+            ->get()
+            ->map(function ($fee) {
+                return [
+                    'id' => 'UF-' . $fee->id,
+                    'date' => $fee->transaction_date->format('Y-m-d'),
+                    'source' => '公共事業費',
+                    'category' => $fee->category,
+                    'item' => $fee->description ?: $fee->category,
+                    'reference' => '-',
+                    'invoice_number' => $fee->invoice_number,
+                    'amount' => (float)$fee->amount,
+                ];
+            });
+
+        $allRecords = $purchaseOrders->concat($utilityFees)
+            ->sortByDesc('date')
+            ->values();
+
+        return [
+            'records' => $allRecords,
+            'summary' => [
+                'total_amount' => $allRecords->sum('amount'),
+                'purchase_total' => $purchaseOrders->sum('amount'),
+                'utility_total' => $utilityFees->sum('amount'),
+                'record_count' => $allRecords->count(),
+            ]
+        ];
+    }
+
+    public function getUtilityFees(array $filters)
+    {
+        $query = UtilityFee::query();
+
+        if (!empty($filters['search'])) {
+            $search = $filters['search'];
+            $query->where(function($q) use ($search) {
+                $q->where('category', 'like', "%{$search}%")
+                  ->orWhere('invoice_number', 'like', "%{$search}%")
+                  ->orWhere('description', 'like', "%{$search}%");
+            });
+        }
+
+        if (!empty($filters['category']) && $filters['category'] !== 'all') {
+            $query->where('category', $filters['category']);
+        }
+
+        if (!empty($filters['date_start'])) {
+            $query->where('transaction_date', '>=', $filters['date_start']);
+        }
+
+        if (!empty($filters['date_end'])) {
+            $query->where('transaction_date', '<=', $filters['date_end']);
+        }
+
+        $sortField = $filters['sort_field'] ?? 'created_at';
+        $sortDirection = $filters['sort_direction'] ?? 'desc';
+        $query->orderBy($sortField, $sortDirection);
+
+        return $query->paginate($filters['per_page'] ?? 10);
+    }
+
+    public function getUniqueCategories(): Collection
+    {
+        return UtilityFee::distinct()->pluck('category');
+    }
+}

app/Modules/Inventory/Contracts/InventoryServiceInterface.php

@@ -0,0 +1,115 @@
+<?php
+
+namespace App\Modules\Inventory\Contracts;
+
+interface InventoryServiceInterface
+{
+    /**
+     * Check if a product has sufficient stock in a specific warehouse.
+     *
+     * @param int $productId
+     * @param int $warehouseId
+     * @param float $quantity
+     * @return bool
+     */
+    public function checkStock(int $productId, int $warehouseId, float $quantity): bool;
+
+    /**
+     * Decrease stock for a product (e.g., when an order is placed).
+     * 
+     * @param int $productId
+     * @param int $warehouseId
+     * @param float $quantity
+     * @param string|null $reason
+     * @return void
+     */
+    public function decreaseStock(int $productId, int $warehouseId, float $quantity, ?string $reason = null): void;
+
+    /**
+     * Get all active warehouses.
+     * 
+     * @return \Illuminate\Support\Collection
+     */
+    public function getAllWarehouses();
+
+    /**
+     * Get multiple products by their IDs.
+     * 
+     * @param array $ids
+     * @return \Illuminate\Support\Collection
+     */
+    public function getProductsByIds(array $ids);
+
+    /**
+     * Search products by name.
+     * 
+     * @param string $name
+     * @return \Illuminate\Support\Collection
+     */
+    public function getProductsByName(string $name);
+
+    /**
+     * Get a specific product by ID.
+     * 
+     * @param int $id
+     * @return object|null
+     */
+    public function getProduct(int $id);
+
+    /**
+     * Get a specific warehouse by ID.
+     * 
+     * @param int $id
+     * @return object|null
+     */
+    public function getWarehouse(int $id);
+
+    /**
+     * Get all available inventories in a specific warehouse.
+     * 
+     * @param int $warehouseId
+     * @return \Illuminate\Support\Collection
+     */
+    public function getInventoriesByWarehouse(int $warehouseId);
+
+    /**
+     * Get all products.
+     * 
+     * @return \Illuminate\Support\Collection
+     */
+    public function getAllProducts();
+
+    /**
+     * Get all units.
+     * 
+     * @return \Illuminate\Support\Collection
+     */
+    public function getUnits();
+
+    /**
+     * Create a new inventory record (e.g., for finished goods).
+     * 
+     * @param array $data
+     * @return object
+     */
+    public function createInventoryRecord(array $data);
+
+    /**
+     * Decrease quantity of a specific inventory record.
+     * 
+     * @param int $inventoryId
+     * @param float $quantity
+     * @param string|null $reason
+     * @param string|null $referenceType
+     * @param int|string|null $referenceId
+     * @return void
+     */
+    public function decreaseInventoryQuantity(int $inventoryId, float $quantity, ?string $reason = null, ?string $referenceType = null, $referenceId = null);
+
+    /**
+     * Get statistics for the dashboard.
+     * 
+     * @return array
+     */
+    public function getDashboardStats(): array;
+}

app/Modules/Inventory/Controllers/CategoryController.php

@@ -1,8 +1,10 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Inventory\Controllers;
 
-use App\Models\Category;
+use App\Http\Controllers\Controller;
+
+use App\Modules\Inventory\Models\Category;
 use Illuminate\Http\Request;
 
 class CategoryController extends Controller

app/Modules/Inventory/Controllers/InventoryController.php

@@ -0,0 +1,530 @@
+<?php
+
+namespace App\Modules\Inventory\Controllers;
+
+use App\Http\Controllers\Controller;
+
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
+use Inertia\Inertia;
+use App\Modules\Inventory\Models\Warehouse;
+use App\Modules\Inventory\Models\Product;
+use App\Modules\Inventory\Models\Inventory;
+use App\Modules\Inventory\Models\WarehouseProductSafetyStock;
+
+use App\Modules\Core\Contracts\CoreServiceInterface;
+
+class InventoryController extends Controller
+{
+    protected $coreService;
+
+    public function __construct(CoreServiceInterface $coreService)
+    {
+        $this->coreService = $coreService;
+    }
+
+    public function index(Request $request, Warehouse $warehouse)
+    {
+        // ... (existing code for index) ...
+        $warehouse->load([
+            'inventories.product.category',
+            'inventories.product.baseUnit',
+            'inventories.lastIncomingTransaction',
+            'inventories.lastOutgoingTransaction'
+        ]);
+        $allProducts = Product::with('category')->get();
+
+        // 1. 準備 availableProducts
+        $availableProducts = $allProducts->map(function ($product) {
+            return [
+                'id' => (string) $product->id,
+                'name' => $product->name,
+                'type' => $product->category?->name ?? '其他',
+            ];
+        });
+
+        // 2. 從新表格讀取安全庫存設定 (商品-倉庫層級)
+        $safetyStockMap = WarehouseProductSafetyStock::where('warehouse_id', $warehouse->id)
+            ->pluck('safety_stock', 'product_id')
+            ->mapWithKeys(fn($val, $key) => [(string)$key => (float)$val]);
+
+        // 3. 準備 inventories (批號分組)
+        $items = $warehouse->inventories()
+            ->with(['product.baseUnit', 'lastIncomingTransaction', 'lastOutgoingTransaction'])
+            ->get();
+
+        $inventories = $items->groupBy('product_id')->map(function ($batchItems) use ($safetyStockMap) {
+            $firstItem = $batchItems->first();
+            $product = $firstItem->product;
+            $totalQuantity = $batchItems->sum('quantity');
+            $totalValue = $batchItems->sum('total_value'); // 計算總價值
+
+            // 從獨立表格讀取安全庫存
+            $safetyStock = $safetyStockMap[(string)$firstItem->product_id] ?? null;
+
+            // 計算狀態
+            $status = '正常';
+            if (!is_null($safetyStock)) {
+                if ($totalQuantity < $safetyStock) {
+                    $status = '低於';
+                }
+            }
+
+            return [
+                'productId' => (string) $firstItem->product_id,
+                'productName' => $product?->name ?? '未知商品',
+                'productCode' => $product?->code ?? 'N/A',
+                'baseUnit' => $product?->baseUnit?->name ?? '個',
+                'totalQuantity' => (float) $totalQuantity,
+                'totalValue' => (float) $totalValue,
+                'safetyStock' => $safetyStock,
+                'status' => $status,
+                'batches' => $batchItems->map(function ($inv) {
+                    return [
+                        'id' => (string) $inv->id,
+                        'warehouseId' => (string) $inv->warehouse_id,
+                        'productId' => (string) $inv->product_id,
+                        'productName' => $inv->product?->name ?? '未知商品',
+                        'productCode' => $inv->product?->code ?? 'N/A',
+                        'unit' => $inv->product?->baseUnit?->name ?? '個',
+                        'quantity' => (float) $inv->quantity,
+                        'unit_cost' => (float) $inv->unit_cost,
+                        'total_value' => (float) $inv->total_value,
+                        'safetyStock' => null, // 批號層級不再有安全庫存
+                        'status' => '正常',
+                        'batchNumber' => $inv->batch_number ?? 'BATCH-' . $inv->id,
+                        'expiryDate' => $inv->expiry_date ? $inv->expiry_date->format('Y-m-d') : null,
+                        'lastInboundDate' => $inv->lastIncomingTransaction ? ($inv->lastIncomingTransaction->actual_time ? $inv->lastIncomingTransaction->actual_time->format('Y-m-d') : $inv->lastIncomingTransaction->created_at->format('Y-m-d')) : null,
+                        'lastOutboundDate' => $inv->lastOutgoingTransaction ? ($inv->lastOutgoingTransaction->actual_time ? $inv->lastOutgoingTransaction->actual_time->format('Y-m-d') : $inv->lastOutgoingTransaction->created_at->format('Y-m-d')) : null,
+                    ];
+                })->values(),
+            ];
+        })->values();
+
+        // 4. 準備 safetyStockSettings (從新表格讀取)
+        $safetyStockSettings = WarehouseProductSafetyStock::where('warehouse_id', $warehouse->id)
+            ->with(['product.category'])
+            ->get()
+            ->map(function ($setting) {
+                return [
+                    'id' => (string) $setting->id,
+                    'warehouseId' => (string) $setting->warehouse_id,
+                    'productId' => (string) $setting->product_id,
+                    'productName' => $setting->product?->name ?? '未知商品',
+                    'productType' => $setting->product?->category?->name ?? '其他',
+                    'safetyStock' => (float) $setting->safety_stock,
+                    'createdAt' => $setting->created_at->toIso8601String(),
+                    'updatedAt' => $setting->updated_at->toIso8601String(),
+                ];
+            });
+
+        return Inertia::render('Warehouse/Inventory', [
+            'warehouse' => $warehouse,
+            'inventories' => $inventories,
+            'safetyStockSettings' => $safetyStockSettings,
+            'availableProducts' => $availableProducts,
+        ]);
+    }
+
+    public function create(Warehouse $warehouse)
+    {
+       // ... (unchanged) ...
+        $products = Product::with(['baseUnit', 'largeUnit'])
+            ->select('id', 'name', 'code', 'base_unit_id', 'large_unit_id', 'conversion_rate')
+            ->get()
+            ->map(function ($product) {
+            return [
+                'id' => (string) $product->id,
+                'name' => $product->name,
+                'code' => $product->code,
+                'baseUnit' => $product->baseUnit?->name ?? '個',
+                'largeUnit' => $product->largeUnit?->name, // 可能為 null
+                'conversionRate' => (float) $product->conversion_rate,
+            ];
+        });
+
+        return Inertia::render('Warehouse/AddInventory', [
+            'warehouse' => $warehouse,
+            'products' => $products,
+        ]);
+    }
+
+    public function store(Request $request, Warehouse $warehouse)
+    {
+        // ... (unchanged) ...
+        $validated = $request->validate([
+            'inboundDate' => 'required|date',
+            'reason' => 'required|string',
+            'notes' => 'nullable|string',
+            'items' => 'required|array|min:1',
+            'items.*.productId' => 'required|exists:products,id',
+            'items.*.quantity' => 'required|numeric|min:0.01',
+            'items.*.unit_cost' => 'nullable|numeric|min:0', // 新增成本驗證
+            'items.*.batchMode' => 'required|in:existing,new',
+            'items.*.inventoryId' => 'required_if:items.*.batchMode,existing|nullable|exists:inventories,id',
+            'items.*.originCountry' => 'required_if:items.*.batchMode,new|nullable|string|max:2',
+            'items.*.expiryDate' => 'nullable|date',
+        ]);
+
+        return DB::transaction(function () use ($validated, $warehouse) {
+            foreach ($validated['items'] as $item) {
+                // ... (略，傳遞 unit_cost 交給 Service 處理) ...
+                // 這裡需要修改呼叫 Service 的地方或直接更新邏輯
+                // 為求快速，我將在此更新邏輯
+                
+                $inventory = null;
+
+                if ($item['batchMode'] === 'existing') {
+                    // 模式 A：選擇現有批號 (包含已刪除的也要能找回來累加)
+                    $inventory = Inventory::withTrashed()->findOrFail($item['inventoryId']);
+                    if ($inventory->trashed()) {
+                        $inventory->restore();
+                    }
+                    
+                    // 更新成本 (若有傳入)
+                    if (isset($item['unit_cost'])) {
+                        $inventory->unit_cost = $item['unit_cost'];
+                    }
+                } else {
+                    // 模式 B：建立新批號
+                    $originCountry = $item['originCountry'] ?? 'TW';
+                    $product = Product::find($item['productId']);
+                    
+                    $batchNumber = Inventory::generateBatchNumber(
+                        $product->code ?? 'UNK',
+                        $originCountry,
+                        $validated['inboundDate']
+                    );
+
+                    // 檢查是否存在
+                    $inventory = $warehouse->inventories()->withTrashed()->firstOrNew(
+                        [
+                            'product_id' => $item['productId'],
+                            'batch_number' => $batchNumber
+                        ],
+                        [
+                            'quantity' => 0,
+                            'unit_cost' => $item['unit_cost'] ?? 0, // 新增
+                            'total_value' => 0, // 稍後計算
+                            'arrival_date' => $validated['inboundDate'],
+                            'expiry_date' => $item['expiryDate'] ?? null,
+                            'origin_country' => $originCountry,
+                        ]
+                    );
+
+                    if ($inventory->trashed()) {
+                        $inventory->restore();
+                    }
+                }
+
+                $currentQty = $inventory->quantity;
+                $newQty = $currentQty + $item['quantity'];
+
+                $inventory->quantity = $newQty;
+                // 更新總價值
+                $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
+                $inventory->save();
+
+                // 寫入異動紀錄
+                $inventory->transactions()->create([
+                    'type' => '手動入庫',
+                    'quantity' => $item['quantity'],
+                    'unit_cost' => $inventory->unit_cost, // 記錄成本
+                    'balance_before' => $currentQty,
+                    'balance_after' => $newQty,
+                    'reason' => $validated['reason'] . ($validated['notes'] ? ' - ' . $validated['notes'] : ''),
+                    'actual_time' => $validated['inboundDate'],
+                    'user_id' => auth()->id(),
+                ]);
+            }
+
+            return redirect()->route('warehouses.inventory.index', $warehouse->id)
+                ->with('success', '庫存記錄已儲存成功');
+        });
+    }
+
+    // ... (getBatches unchanged) ...
+    public function getBatches(Warehouse $warehouse, $productId, Request $request)
+    {
+        $originCountry = $request->query('originCountry', 'TW');
+        $arrivalDate = $request->query('arrivalDate', now()->format('Y-m-d'));
+
+        $batches = Inventory::where('warehouse_id', $warehouse->id)
+            ->where('product_id', $productId)
+            ->get()
+            ->map(function ($inventory) {
+                return [
+                    'inventoryId' => (string) $inventory->id,
+                    'batchNumber' => $inventory->batch_number,
+                    'originCountry' => $inventory->origin_country,
+                    'expiryDate' => $inventory->expiry_date ? $inventory->expiry_date->format('Y-m-d') : null,
+                    'quantity' => (float) $inventory->quantity,
+                    'unitCost' => (float) $inventory->unit_cost, // 新增
+                ];
+            });
+
+        // 計算下一個流水號
+        $product = Product::find($productId);
+        $nextSequence = '01';
+        if ($product) {
+            $batchNumber = Inventory::generateBatchNumber(
+                $product->code ?? 'UNK',
+                $originCountry,
+                $arrivalDate
+            );
+            $nextSequence = substr($batchNumber, -2);
+        }
+
+        return response()->json([
+            'batches' => $batches,
+            'nextSequence' => $nextSequence
+        ]);
+    }
+
+
+    public function edit(Request $request, Warehouse $warehouse, $inventoryId)
+    {
+        if (str_starts_with($inventoryId, 'mock-inv-')) {
+             return redirect()->back()->with('error', '無法編輯範例資料');
+        }
+
+        // 移除 'transactions.user' 預載入
+        $inventory = Inventory::with(['product', 'transactions' => function($query) {
+            $query->orderBy('actual_time', 'desc')->orderBy('id', 'desc');
+        }])->findOrFail($inventoryId);
+
+        // 手動 Hydrate 使用者資料
+        $userIds = $inventory->transactions->pluck('user_id')->filter()->unique()->toArray();
+        $users = $this->coreService->getUsersByIds($userIds)->keyBy('id');
+
+        // 轉換為前端需要的格式
+        $inventoryData = [
+            'id' => (string) $inventory->id,
+            'warehouseId' => (string) $inventory->warehouse_id,
+            'productId' => (string) $inventory->product_id,
+            'productName' => $inventory->product?->name ?? '未知商品',
+            'quantity' => (float) $inventory->quantity,
+            'unit_cost' => (float) $inventory->unit_cost,
+            'total_value' => (float) $inventory->total_value,
+            'batchNumber' => $inventory->batch_number ?? '-',
+            'expiryDate' => $inventory->expiry_date ?? null,
+            'lastInboundDate' => $inventory->updated_at->format('Y-m-d'),
+            'lastOutboundDate' => null,
+        ];
+
+        // 整理異動紀錄
+        $transactions = $inventory->transactions->map(function ($tx) use ($users) {
+            $user = $tx->user_id ? ($users[$tx->user_id] ?? null) : null;
+            return [
+                'id' => (string) $tx->id,
+                'type' => $tx->type,
+                'quantity' => (float) $tx->quantity,
+                'unit_cost' => (float) $tx->unit_cost,
+                'balanceAfter' => (float) $tx->balance_after,
+                'reason' => $tx->reason,
+                'userName' => $user ? $user->name : '系統', // 手動對應
+                'actualTime' => $tx->actual_time ? $tx->actual_time->format('Y-m-d H:i') : $tx->created_at->format('Y-m-d H:i'),
+            ];
+        });
+
+        return Inertia::render('Warehouse/EditInventory', [
+            'warehouse' => $warehouse,
+            'inventory' => $inventoryData,
+            'transactions' => $transactions,
+        ]);
+    }
+
+    public function update(Request $request, Warehouse $warehouse, $inventoryId)
+    {
+        // ... (unchanged) ...
+        $inventory = Inventory::find($inventoryId);
+        
+        // 如果找不到 (可能是舊路由傳 product ID)
+        if (!$inventory) {
+             $inventory = $warehouse->inventories()->where('product_id', $inventoryId)->first();
+        }
+
+        if (!$inventory) {
+            return redirect()->back()->with('error', '找不到庫存紀錄');
+        }
+
+        $validated = $request->validate([
+            'quantity' => 'required|numeric|min:0',
+            // 以下欄位改為 nullable，支援新表單
+            'type' => 'nullable|string',
+            'operation' => 'nullable|in:add,subtract,set',
+            'reason' => 'nullable|string',
+            'notes' => 'nullable|string',
+            'unit_cost' => 'nullable|numeric|min:0', // 新增成本
+            // ...
+            'batchNumber' => 'nullable|string',
+            'expiryDate' => 'nullable|date',
+            'lastInboundDate' => 'nullable|date',
+            'lastOutboundDate' => 'nullable|date',
+        ]);
+
+        return DB::transaction(function () use ($validated, $inventory) {
+            $currentQty = (float) $inventory->quantity;
+            $newQty = (float) $validated['quantity'];
+            
+            // 判斷是否來自調整彈窗 (包含 operation 參數)
+            $isAdjustment = isset($validated['operation']);
+            $changeQty = 0;
+
+            if ($isAdjustment) {
+                switch ($validated['operation']) {
+                    case 'add':
+                        $changeQty = (float) $validated['quantity'];
+                        $newQty = $currentQty + $changeQty;
+                        break;
+                    case 'subtract':
+                        $changeQty = -(float) $validated['quantity'];
+                        $newQty = $currentQty + $changeQty;
+                        break;
+                    case 'set':
+                        $changeQty = $newQty - $currentQty;
+                        break;
+                }
+            } else {
+                // 來自編輯頁面，直接 Set
+                $changeQty = $newQty - $currentQty;
+            }
+
+            // 更新成本 (若有傳)
+            if (isset($validated['unit_cost'])) {
+                $inventory->unit_cost = $validated['unit_cost'];
+            }
+
+            // 更新庫存
+            $inventory->quantity = $newQty;
+            // 更新總值
+            $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
+            $inventory->save();
+
+            // 異動類型映射
+            $type = $validated['type'] ?? ($isAdjustment ? 'manual_adjustment' : 'adjustment');
+            $typeMapping = [
+                'manual_adjustment' => '手動調整庫存',
+                'adjustment' => '盤點調整',
+                'purchase_in' => '採購進貨',
+                'sales_out' => '銷售出庫',
+                'return_in' => '退貨入庫',
+                'return_out' => '退貨出庫',
+                'transfer_in' => '撥補入庫',
+                'transfer_out' => '撥補出庫',
+            ];
+            $chineseType = $typeMapping[$type] ?? $type;
+            
+            // 如果是編輯頁面來的，且沒傳 type，設為手動編輯
+            if (!$isAdjustment && !isset($validated['type'])) {
+                $chineseType = '手動編輯';
+            }
+
+            // 整理原因
+            $reason = $validated['reason'] ?? ($isAdjustment ? '手動庫存調整' : '編輯頁面更新');
+            if (isset($validated['notes'])) {
+                $reason .= ' - ' . $validated['notes'];
+            }
+
+            // 寫入異動紀錄
+            if (abs($changeQty) > 0.0001) {
+                $inventory->transactions()->create([
+                    'type' => $chineseType,
+                    'quantity' => $changeQty,
+                    'unit_cost' => $inventory->unit_cost, // 記錄
+                    'balance_before' => $currentQty,
+                    'balance_after' => $newQty,
+                    'reason' => $reason,
+                    'actual_time' => now(), 
+                    'user_id' => auth()->id(),
+                ]);
+            }
+
+            return redirect()->route('warehouses.inventory.index', $inventory->warehouse_id)
+                ->with('success', '庫存資料已更新');
+        });
+    }
+
+    public function destroy(Warehouse $warehouse, $inventoryId)
+    {
+         // ... (unchanged) ...
+          $inventory = Inventory::findOrFail($inventoryId);
+         
+         // 庫存 > 0 不允許刪除 (哪怕是軟刪除)
+         if ($inventory->quantity > 0) {
+             return redirect()->back()->with('error', '庫存數量大於 0，無法刪除。請先進行出庫或調整。');
+         }
+         
+         // 歸零異動 (因為已經限制為 0 才能刪，這段邏輯可以簡化，但為了保險起見，若有微小殘值仍可記錄歸零)
+         if (abs($inventory->quantity) > 0.0001) {
+             $inventory->transactions()->create([
+                    'type' => '手動編輯',
+                    'quantity' => -$inventory->quantity,
+                    'unit_cost' => $inventory->unit_cost,
+                    'balance_before' => $inventory->quantity,
+                    'balance_after' => 0,
+                    'reason' => '刪除庫存品項',
+                    'actual_time' => now(),
+                    'user_id' => auth()->id(),
+             ]);
+         }
+         
+         $inventory->delete();
+         
+         return redirect()->route('warehouses.inventory.index', $warehouse->id)
+                ->with('success', '庫存品項已刪除');
+    }
+
+    public function history(Request $request, \App\Modules\Inventory\Models\Warehouse $warehouse)
+    {
+        // ... (前端 history 頁面可能也需要 unit_cost，這裡可補上) ...
+        $inventoryId = $request->query('inventoryId');
+        $productId = $request->query('productId');
+
+        if ($productId) {
+            // ... (略) ...
+        }
+
+        if ($inventoryId) {
+            // 單一批號查詢
+            // 移除 'transactions.user'
+            $inventory = Inventory::with(['product', 'transactions' => function($query) {
+                $query->orderBy('actual_time', 'desc')->orderBy('id', 'desc');
+            }])->findOrFail($inventoryId);
+
+            // 手動 Hydrate 使用者資料
+            $userIds = $inventory->transactions->pluck('user_id')->filter()->unique()->toArray();
+            $users = $this->coreService->getUsersByIds($userIds)->keyBy('id');
+
+            $transactions = $inventory->transactions->map(function ($tx) use ($users) {
+                $user = $tx->user_id ? ($users[$tx->user_id] ?? null) : null;
+                return [
+                    'id' => (string) $tx->id,
+                    'type' => $tx->type,
+                    'quantity' => (float) $tx->quantity,
+                    'unit_cost' => (float) $tx->unit_cost, 
+                    'balanceAfter' => (float) $tx->balance_after,
+                    'reason' => $tx->reason,
+                    'userName' => $user ? $user->name : '系統', // 手動對應
+                    'actualTime' => $tx->actual_time ? $tx->actual_time->format('Y-m-d H:i') : $tx->created_at->format('Y-m-d H:i'),
+                ];
+            });
+
+            return Inertia::render('Warehouse/InventoryHistory', [
+                'warehouse' => $warehouse,
+                'inventory' => [
+                    'id' => (string) $inventory->id,
+                    'productName' => $inventory->product?->name ?? '未知商品',
+                    'productCode' => $inventory->product?->code ?? 'N/A',
+                    'batchNumber' => $inventory->batch_number ?? '-',
+                    'quantity' => (float) $inventory->quantity,
+                    'unit_cost' => (float) $inventory->unit_cost,
+                    'total_value' => (float) $inventory->total_value,
+                ],
+                'transactions' => $transactions
+            ]);
+        }
+
+        return redirect()->back()->with('error', '未提供查詢參數');
+    }
+}

app/Modules/Inventory/Controllers/ProductController.php

@@ -1,9 +1,12 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Inventory\Controllers;
 
-use App\Models\Product;
-use App\Models\Unit;
+use App\Http\Controllers\Controller;
+
+use App\Modules\Inventory\Models\Product;
+use App\Modules\Inventory\Models\Unit;
+use App\Modules\Inventory\Models\Category;
 use Illuminate\Http\Request;
 use Inertia\Inertia;
 use Inertia\Response;
@@ -11,7 +14,7 @@ use Inertia\Response;
 class ProductController extends Controller
 {
     /**
-     * Display a listing of the resource.
+     * 顯示資源列表。
      */
     public function index(Request $request): Response
     {
@@ -38,7 +41,7 @@ class ProductController extends Controller
         $sortField = $request->input('sort_field', 'id');
         $sortDirection = $request->input('sort_direction', 'desc');
         
-        // Define allowed sort fields to prevent SQL injection
+        // 定義允許的排序欄位以防止 SQL 注入
         $allowedSorts = ['id', 'code', 'name', 'category_id', 'base_unit_id', 'conversion_rate'];
         if (!in_array($sortField, $allowedSorts)) {
             $sortField = 'id';
@@ -47,11 +50,11 @@ class ProductController extends Controller
             $sortDirection = 'desc';
         }
 
-        // Handle relation sorting (category name) separately if needed, or simple join
+        // 如果需要，分別處理關聯排序（分類名稱），或簡單的 join
         if ($sortField === 'category_id') {
-            // Join categories for sorting by name? Or just by ID?
-            // Simple approach: sort by ID for now, or join if user wants name sort.
-            // Let's assume standard field sorting first.
+            // 加入分類以便按名稱排序？還是僅按 ID？
+            // 簡單方法：目前按 ID 排序，如果使用者想要按名稱排序則 join。
+            // 先假設標準欄位排序。
             $query->orderBy('category_id', $sortDirection);
         } else {
              $query->orderBy($sortField, $sortDirection);
@@ -59,22 +62,54 @@ class ProductController extends Controller
 
         $products = $query->paginate($perPage)->withQueryString();
 
-        $categories = \App\Models\Category::where('is_active', true)->get();
+        $products->getCollection()->transform(function ($product) {
+            return (object) [
+                'id' => (string) $product->id,
+                'code' => $product->code,
+                'name' => $product->name,
+                'categoryId' => $product->category_id,
+                'category' => $product->category ? (object) [
+                    'id' => $product->category->id,
+                    'name' => $product->category->name,
+                ] : null,
+                'brand' => $product->brand,
+                'specification' => $product->specification,
+                'baseUnitId' => $product->base_unit_id,
+                'baseUnit' => $product->baseUnit ? (object) [
+                    'id' => $product->baseUnit->id,
+                    'name' => $product->baseUnit->name,
+                ] : null,
+                'largeUnitId' => $product->large_unit_id,
+                'largeUnit' => $product->largeUnit ? (object) [
+                    'id' => $product->largeUnit->id,
+                    'name' => $product->largeUnit->name,
+                ] : null,
+                'purchaseUnitId' => $product->purchase_unit_id,
+                'purchaseUnit' => $product->purchaseUnit ? (object) [
+                    'id' => $product->purchaseUnit->id,
+                    'name' => $product->purchaseUnit->name,
+                ] : null,
+                'conversionRate' => (float) $product->conversion_rate,
+            ];
+        });
+
+        $categories = Category::where('is_active', true)->get();
 
         return Inertia::render('Product/Index', [
             'products' => $products,
-            'categories' => $categories,
-            'units' => Unit::all(),
+            'categories' => Category::where('is_active', true)->get()->map(fn($c) => (object)['id' => $c->id, 'name' => $c->name]),
+            'units' => Unit::all()->map(fn($u) => (object)['id' => (string) $u->id, 'name' => $u->name, 'code' => $u->code]),
             'filters' => $request->only(['search', 'category_id', 'per_page', 'sort_field', 'sort_direction']),
         ]);
     }
 
     /**
-     * Store a newly created resource in storage.
+     * 將新建立的資源儲存到儲存體中。
      */
     public function store(Request $request)
     {
         $validated = $request->validate([
+            'code' => 'required|string|max:2|unique:products,code',
             'name' => 'required|string|max:255',
             'category_id' => 'required|exists:categories,id',
             'brand' => 'nullable|string|max:255',
@@ -85,6 +120,9 @@ class ProductController extends Controller
             'conversion_rate' => 'required_with:large_unit_id|nullable|numeric|min:0.0001',
             'purchase_unit_id' => 'nullable|exists:units,id',
         ], [
+            'code.required' => '商品代號為必填',
+            'code.max' => '商品代號最多 2 碼',
+            'code.unique' => '商品代號已存在',
             'name.required' => '商品名稱為必填',
             'category_id.required' => '請選擇分類',
             'category_id.exists' => '所選分類不存在',
@@ -94,14 +132,6 @@ class ProductController extends Controller
             'conversion_rate.numeric' => '換算率必須為數字',
             'conversion_rate.min' => '換算率最小為 0.0001',
         ]);
-
-        // Auto-generate code
-        $prefix = 'P';
-        $lastProduct = Product::withTrashed()->latest('id')->first();
-        $nextId = $lastProduct ? $lastProduct->id + 1 : 1;
-        $code = $prefix . str_pad($nextId, 5, '0', STR_PAD_LEFT);
-
-        $validated['code'] = $code;
         
         $product = Product::create($validated);
 
@@ -109,11 +139,12 @@ class ProductController extends Controller
     }
 
     /**
-     * Update the specified resource in storage.
+     * 更新儲存體中的指定資源。
      */
     public function update(Request $request, Product $product)
     {
         $validated = $request->validate([
+            'code' => 'required|string|max:2|unique:products,code,' . $product->id,
             'name' => 'required|string|max:255',
             'category_id' => 'required|exists:categories,id',
             'brand' => 'nullable|string|max:255',
@@ -123,6 +154,9 @@ class ProductController extends Controller
             'conversion_rate' => 'required_with:large_unit_id|nullable|numeric|min:0.0001',
             'purchase_unit_id' => 'nullable|exists:units,id',
         ], [
+            'code.required' => '商品代號為必填',
+            'code.max' => '商品代號最多 2 碼',
+            'code.unique' => '商品代號已存在',
             'name.required' => '商品名稱為必填',
             'category_id.required' => '請選擇分類',
             'category_id.exists' => '所選分類不存在',
@@ -139,7 +173,7 @@ class ProductController extends Controller
     }
 
     /**
-     * Remove the specified resource from storage.
+     * 從儲存體中移除指定資源。
      */
     public function destroy(Product $product)
     {

app/Modules/Inventory/Controllers/SafetyStockController.php

@@ -1,10 +1,13 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Inventory\Controllers;
 
-use App\Models\Warehouse;
-use App\Models\Inventory;
-use App\Models\Product;
+use App\Http\Controllers\Controller;
+
+use App\Modules\Inventory\Models\Warehouse;
+use App\Modules\Inventory\Models\WarehouseProductSafetyStock;
+use App\Modules\Inventory\Models\Product;
+use App\Modules\Inventory\Models\Inventory;
 use Illuminate\Http\Request;
 use Inertia\Inertia;
 use Illuminate\Support\Facades\DB;
@@ -16,8 +19,6 @@ class SafetyStockController extends Controller
      */
     public function index(Warehouse $warehouse)
     {
-        $warehouse->load(['inventories.product.category']);
-        
         $allProducts = Product::with(['category', 'baseUnit'])->get();
 
         // 準備可選商品列表
@@ -30,32 +31,34 @@ class SafetyStockController extends Controller
             ];
         });
 
-        // 準備現有庫存列表 (用於狀態計算)
-        $inventories = $warehouse->inventories->map(function ($inv) {
-            return [
-                'id' => (string) $inv->id,
-                'productId' => (string) $inv->product_id,
-                'quantity' => (float) $inv->quantity,
-                'safetyStock' => (float) $inv->safety_stock,
-            ];
-        });
-
-        // 準備安全庫存設定列表
-        $safetyStockSettings = $warehouse->inventories->filter(function($inv) {
-            return !is_null($inv->safety_stock);
-        })->map(function ($inv) {
-            return [
-                'id' => (string) $inv->id,
-                'warehouseId' => (string) $inv->warehouse_id,
-                'productId' => (string) $inv->product_id,
-                'productName' => $inv->product->name,
-                'productType' => $inv->product->category ? $inv->product->category->name : '其他',
-                'safetyStock' => (float) $inv->safety_stock,
-                'unit' => $inv->product->baseUnit?->name ?? '個',
-                'updatedAt' => $inv->updated_at->toIso8601String(),
-            ];
-        })->values();
+        // 準備現有庫存列表 (用於庫存量對比)
+        $inventories = Inventory::where('warehouse_id', $warehouse->id)
+            ->select('product_id', DB::raw('SUM(quantity) as total_quantity'))
+            ->groupBy('product_id')
+            ->get()
+            ->map(function ($inv) {
+                return [
+                    'productId' => (string) $inv->product_id,
+                    'quantity' => (float) $inv->total_quantity,
+                ];
+            });
 
+        // 準備安全庫存設定列表 (從新表格讀取)
+        $safetyStockSettings = WarehouseProductSafetyStock::where('warehouse_id', $warehouse->id)
+            ->with(['product.category', 'product.baseUnit'])
+            ->get()
+            ->map(function ($setting) {
+                return [
+                    'id' => (string) $setting->id,
+                    'warehouseId' => (string) $setting->warehouse_id,
+                    'productId' => (string) $setting->product_id,
+                    'productName' => $setting->product->name,
+                    'productType' => $setting->product->category ? $setting->product->category->name : '其他',
+                    'safetyStock' => (float) $setting->safety_stock,
+                    'unit' => $setting->product->baseUnit?->name ?? '個',
+                    'updatedAt' => $setting->updated_at->toIso8601String(),
+                ];
+            });
 
         return Inertia::render('Warehouse/SafetyStockSettings', [
             'warehouse' => $warehouse,
@@ -78,7 +81,7 @@ class SafetyStockController extends Controller
 
         DB::transaction(function () use ($validated, $warehouse) {
             foreach ($validated['settings'] as $item) {
-                Inventory::updateOrCreate(
+                WarehouseProductSafetyStock::updateOrCreate(
                     [
                         'warehouse_id' => $warehouse->id,
                         'product_id' => $item['productId'],
@@ -96,13 +99,13 @@ class SafetyStockController extends Controller
     /**
      * 更新單筆安全庫存設定
      */
-    public function update(Request $request, Warehouse $warehouse, Inventory $inventory)
+    public function update(Request $request, Warehouse $warehouse, WarehouseProductSafetyStock $safetyStock)
     {
         $validated = $request->validate([
             'safetyStock' => 'required|numeric|min:0',
         ]);
 
-        $inventory->update([
+        $safetyStock->update([
             'safety_stock' => $validated['safetyStock'],
         ]);
 
@@ -110,13 +113,11 @@ class SafetyStockController extends Controller
     }
 
     /**
-     * 刪除 (歸零) 安全庫存設定
+     * 刪除安全庫存設定
      */
-    public function destroy(Warehouse $warehouse, Inventory $inventory)
+    public function destroy(Warehouse $warehouse, WarehouseProductSafetyStock $safetyStock)
     {
-        $inventory->update([
-            'safety_stock' => null,
-        ]);
+        $safetyStock->delete();
 
         return redirect()->back()->with('success', '安全庫存設定已移除');
     }

app/Modules/Inventory/Controllers/TransferOrderController.php

@@ -1,9 +1,11 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Inventory\Controllers;
 
-use App\Models\Inventory;
-use App\Models\Warehouse;
+use App\Http\Controllers\Controller;
+
+use App\Modules\Inventory\Models\Inventory;
+use App\Modules\Inventory\Models\Warehouse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Validation\ValidationException;
@@ -27,26 +29,32 @@ class TransferOrderController extends Controller
         ]);
 
         return DB::transaction(function () use ($validated) {
-            // 1. 檢查來源倉庫庫存
+            // 1. 檢查來源倉庫庫存 (精確匹配產品與批號)
             $sourceInventory = Inventory::where('warehouse_id', $validated['sourceWarehouseId'])
                 ->where('product_id', $validated['productId'])
+                ->where('batch_number', $validated['batchNumber'])
                 ->first();
 
             if (!$sourceInventory || $sourceInventory->quantity < $validated['quantity']) {
                 throw ValidationException::withMessages([
-                    'quantity' => ['來源倉庫庫存不足'],
+                    'quantity' => ['來源倉庫指定批號庫存不足'],
                 ]);
             }
 
-            // 2. 獲取或建立目標倉庫庫存
+            // 2. 獲取或建立目標倉庫庫存 (精確匹配產品與批號，並繼承效期與品質狀態)
             $targetInventory = Inventory::firstOrCreate(
                 [
                     'warehouse_id' => $validated['targetWarehouseId'],
                     'product_id' => $validated['productId'],
+                    'batch_number' => $validated['batchNumber'],
                 ],
                 [
                     'quantity' => 0,
-                    'safety_stock' => null, // 預設為 null (未設定)，而非 0
+                    'unit_cost' => $sourceInventory->unit_cost, // 繼承成本
+                    'total_value' => 0,
+                    'expiry_date' => $sourceInventory->expiry_date,
+                    'quality_status' => $sourceInventory->quality_status,
+                    'origin_country' => $sourceInventory->origin_country,
                 ]
             );
 
@@ -56,12 +64,18 @@ class TransferOrderController extends Controller
             // 3. 執行庫存轉移 (扣除來源)
             $oldSourceQty = $sourceInventory->quantity;
             $newSourceQty = $oldSourceQty - $validated['quantity'];
-            $sourceInventory->update(['quantity' => $newSourceQty]);
+            
+            // 設定活動紀錄原因
+            $sourceInventory->activityLogReason = "撥補出庫 至 {$targetWarehouse->name}";
+            $sourceInventory->quantity = $newSourceQty;
+            $sourceInventory->total_value = $sourceInventory->quantity * $sourceInventory->unit_cost; // 更新總值
+            $sourceInventory->save();
 
             // 記錄來源異動
             $sourceInventory->transactions()->create([
                 'type' => '撥補出庫',
                 'quantity' => -$validated['quantity'],
+                'unit_cost' => $sourceInventory->unit_cost, // 記錄
                 'balance_before' => $oldSourceQty,
                 'balance_after' => $newSourceQty,
                 'reason' => "撥補至 {$targetWarehouse->name}" . ($validated['notes'] ? " ({$validated['notes']})" : ""),
@@ -72,12 +86,22 @@ class TransferOrderController extends Controller
             // 4. 執行庫存轉移 (增加目標)
             $oldTargetQty = $targetInventory->quantity;
             $newTargetQty = $oldTargetQty + $validated['quantity'];
-            $targetInventory->update(['quantity' => $newTargetQty]);
+
+            // 設定活動紀錄原因
+            $targetInventory->activityLogReason = "撥補入庫 來自 {$sourceWarehouse->name}";
+            // 確保目標庫存也有成本 (如果是繼承來的)
+            if ($targetInventory->unit_cost == 0 && $sourceInventory->unit_cost > 0) {
+                 $targetInventory->unit_cost = $sourceInventory->unit_cost;
+            }
+            $targetInventory->quantity = $newTargetQty;
+            $targetInventory->total_value = $targetInventory->quantity * $targetInventory->unit_cost; // 更新總值
+            $targetInventory->save();
 
             // 記錄目標異動
             $targetInventory->transactions()->create([
                 'type' => '撥補入庫',
                 'quantity' => $validated['quantity'],
+                'unit_cost' => $targetInventory->unit_cost, // 記錄
                 'balance_before' => $oldTargetQty,
                 'balance_after' => $newTargetQty,
                 'reason' => "來自 {$sourceWarehouse->name} 的撥補" . ($validated['notes'] ? " ({$validated['notes']})" : ""),
@@ -102,11 +126,14 @@ class TransferOrderController extends Controller
             ->get()
             ->map(function ($inv) {
                 return [
-                    'productId' => (string) $inv->product_id,
-                    'productName' => $inv->product->name,
-                    'batchNumber' => 'BATCH-' . $inv->id, // 模擬批號
-                    'availableQty' => (float) $inv->quantity,
-                    'unit' => $inv->product->baseUnit?->name ?? '個',
+                    'product_id' => (string) $inv->product_id,
+                    'product_name' => $inv->product->name,
+                    'batch_number' => $inv->batch_number,
+                    'quantity' => (float) $inv->quantity,
+                    'unit_cost' => (float) $inv->unit_cost, // 新增
+                    'total_value' => (float) $inv->total_value, // 新增
+                    'unit_name' => $inv->product->baseUnit?->name ?? '個',
+                    'expiry_date' => $inv->expiry_date ? $inv->expiry_date->format('Y-m-d') : null,
                 ];
             });
 

app/Modules/Inventory/Controllers/UnitController.php

@@ -1,15 +1,17 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Inventory\Controllers;
 
-use App\Models\Unit;
-use App\Models\Product; // Import Product to check for usage
+use App\Http\Controllers\Controller;
+
+use App\Modules\Inventory\Models\Unit;
+use App\Modules\Inventory\Models\Product; // Import Product to check for usage
 use Illuminate\Http\Request;
 
 class UnitController extends Controller
 {
     /**
-     * Store a newly created resource in storage.
+     * 將新建立的資源儲存到儲存體中。
      */
     public function store(Request $request)
     {
@@ -29,7 +31,7 @@ class UnitController extends Controller
     }
 
     /**
-     * Update the specified resource in storage.
+     * 更新儲存體中的指定資源。
      */
     public function update(Request $request, Unit $unit)
     {
@@ -49,11 +51,11 @@ class UnitController extends Controller
     }
 
     /**
-     * Remove the specified resource from storage.
+     * 從儲存體中移除指定資源。
      */
     public function destroy(Unit $unit)
     {
-        // Check if unit is used in any product
+        // 檢查單位是否已被任何商品使用
         $isUsed = Product::where('base_unit_id', $unit->id)
             ->orWhere('large_unit_id', $unit->id)
             ->orWhere('purchase_unit_id', $unit->id)

app/Modules/Inventory/Controllers/WarehouseController.php

@@ -1,10 +1,12 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Inventory\Controllers;
+
+use App\Http\Controllers\Controller;
 
 use Illuminate\Http\Request;
 
-use App\Models\Warehouse;
+use App\Modules\Inventory\Models\Warehouse;
 
 use Inertia\Inertia;
 
@@ -22,16 +24,45 @@ class WarehouseController extends Controller
             });
         }
 
-        $warehouses = $query->withSum('inventories as total_quantity', 'quantity')
-            ->withCount(['inventories as low_stock_count' => function ($query) {
-                $query->whereColumn('quantity', '<', 'safety_stock');
-            }])
+        $warehouses = $query->withSum('inventories as book_stock', 'quantity') // 帳面庫存 = 所有庫存總和
+            ->withSum(['inventories as available_stock' => function ($query) {
+                // 可用庫存 = 庫存 > 0 且 品質正常 且 (未過期 或 無效期)
+                $query->where('quantity', '>', 0)
+                      ->where('quality_status', 'normal')
+                      ->where(function ($q) {
+                          $q->whereNull('expiry_date')
+                            ->orWhere('expiry_date', '>=', now());
+                      });
+            }], 'quantity')
             ->orderBy('created_at', 'desc')
             ->paginate(10)
             ->withQueryString();
 
+        // 修正各倉庫列表中的可用庫存計算：若倉庫不可銷售，則可用庫存為 0
+        $warehouses->getCollection()->transform(function ($w) {
+            if (!$w->is_sellable) {
+                $w->available_stock = 0;
+            }
+            return $w;
+        });
+
+        // 計算全域總計 (不分頁)
+        $totals = [
+            'available_stock' => \App\Modules\Inventory\Models\Inventory::where('quantity', '>', 0)
+                ->where('quality_status', 'normal')
+                ->whereHas('warehouse', function ($q) {
+                    $q->where('is_sellable', true);
+                })
+                ->where(function ($q) {
+                    $q->whereNull('expiry_date')
+                      ->orWhere('expiry_date', '>=', now());
+                })->sum('quantity'),
+            'book_stock' => \App\Modules\Inventory\Models\Inventory::sum('quantity'),
+        ];
+
         return Inertia::render('Warehouse/Index', [
             'warehouses' => $warehouses,
+            'totals' => $totals,
             'filters' => $request->only(['search']),
         ]);
     }
@@ -42,9 +73,13 @@ class WarehouseController extends Controller
             'name' => 'required|string|max:50',
             'address' => 'nullable|string|max:255',
             'description' => 'nullable|string',
+            'is_sellable' => 'nullable|boolean',
+            'type' => 'required|string',
+            'license_plate' => 'nullable|string|max:20',
+            'driver_name' => 'nullable|string|max:50',
         ]);
 
-        // Auto-generate code
+        // 自動產生代碼
         $prefix = 'WH';
         $lastWarehouse = Warehouse::latest('id')->first();
         $nextId = $lastWarehouse ? $lastWarehouse->id + 1 : 1;
@@ -63,6 +98,10 @@ class WarehouseController extends Controller
             'name' => 'required|string|max:50',
             'address' => 'nullable|string|max:255',
             'description' => 'nullable|string',
+            'is_sellable' => 'nullable|boolean',
+            'type' => 'required|string',
+            'license_plate' => 'nullable|string|max:20',
+            'driver_name' => 'nullable|string|max:50',
         ]);
 
         $warehouse->update($validated);

app/Modules/Inventory/InventoryServiceProvider.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Modules\Inventory;
+
+use Illuminate\Support\ServiceProvider;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Inventory\Services\InventoryService;
+
+class InventoryServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        $this->app->bind(InventoryServiceInterface::class, InventoryService::class);
+    }
+
+    public function boot(): void
+    {
+        //
+    }
+}

app/Modules/Inventory/Models/Category.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Modules\Inventory\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class Category extends Model
+{
+    use HasFactory, LogsActivity;
+
+    protected $fillable = ['name', 'description'];
+
+    public function products(): HasMany
+    {
+        return $this->hasMany(Product::class);
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties;
+        
+        $snapshot = $properties['snapshot'] ?? [];
+        $snapshot['name'] = $this->name;
+        $properties['snapshot'] = $snapshot;
+
+        $activity->properties = $properties;
+    }
+}

app/Modules/Inventory/Models/Inventory.php

@@ -0,0 +1,138 @@
+<?php
+
+namespace App\Modules\Inventory\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+
+class Inventory extends Model
+{
+    /** @use HasFactory<\Database\Factories\InventoryFactory> */
+    use HasFactory;
+    use \Illuminate\Database\Eloquent\SoftDeletes;
+    use \Spatie\Activitylog\Traits\LogsActivity;
+
+    protected $fillable = [
+        'warehouse_id',
+        'product_id',
+        'quantity',
+        'location',
+        'unit_cost',
+        'total_value',
+        // 批號追溯欄位
+        'batch_number',
+        'box_number',
+        'origin_country',
+        'arrival_date',
+        'expiry_date',
+        'source_purchase_order_id',
+        'quality_status',
+        'quality_remark',
+    ];
+
+    protected $casts = [
+        'arrival_date' => 'date:Y-m-d',
+        'expiry_date' => 'date:Y-m-d',
+        'unit_cost' => 'decimal:4',
+        'total_value' => 'decimal:4',
+    ];
+
+    /**
+     * 用於活動記錄的暫時屬性（例如 "補貨 #123"）。
+     * 此屬性不存儲在資料庫欄位中，但用於記錄上下文。
+     * @var string|null
+     */
+    public $activityLogReason;
+
+    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    {
+        return \Spatie\Activitylog\LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties;
+        $attributes = $properties['attributes'] ?? [];
+        $snapshot = $properties['snapshot'] ?? [];
+
+        // 始終對名稱進行快照以便於上下文顯示，即使 ID 未更改
+        // $this 指的是 Inventory 模型實例
+        $snapshot['warehouse_name'] = $this->warehouse ? $this->warehouse->name : ($snapshot['warehouse_name'] ?? null);
+        $snapshot['product_name'] = $this->product ? $this->product->name : ($snapshot['product_name'] ?? null);
+
+        // 如果已設定原因，則進行捕捉
+        if ($this->activityLogReason) {
+            $attributes['_reason'] = $this->activityLogReason;
+        }
+
+        $properties['attributes'] = $attributes;
+        $properties['snapshot'] = $snapshot;
+        $activity->properties = $properties;
+    }
+
+    public function warehouse(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(Warehouse::class);
+    }
+
+    public function product(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(Product::class);
+    }
+
+    public function transactions(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(InventoryTransaction::class);
+    }
+
+    public function lastOutgoingTransaction()
+    {
+        return $this->hasOne(InventoryTransaction::class)->ofMany([
+            'actual_time' => 'max',
+            'id' => 'max',
+        ], function ($query) {
+            $query->where('quantity', '<', 0);
+        });
+    }
+
+    public function lastIncomingTransaction()
+    {
+        return $this->hasOne(InventoryTransaction::class)->ofMany([
+            'actual_time' => 'max',
+            'id' => 'max',
+        ], function ($query) {
+            $query->where('quantity', '>', 0);
+        });
+    }
+
+
+
+    /**
+     * 產生批號
+     * 格式：{商品代號}-{來源國家}-{入庫日期}-{批次流水號}
+     */
+    public static function generateBatchNumber(string $productCode, string $originCountry, string $arrivalDate): string
+    {
+        $dateFormatted = date('Ymd', strtotime($arrivalDate));
+        $prefix = "{$productCode}-{$originCountry}-{$dateFormatted}-";
+
+        // 加入 withTrashed() 確保流水號不會撞到已刪除的紀錄
+        $lastBatch = static::withTrashed()
+            ->where('batch_number', 'like', "{$prefix}%")
+            ->orderByDesc('batch_number')
+            ->first();
+
+        if ($lastBatch) {
+            $lastNumber = (int) substr($lastBatch->batch_number, -2);
+            $nextNumber = str_pad($lastNumber + 1, 2, '0', STR_PAD_LEFT);
+        } else {
+            $nextNumber = '01';
+        }
+
+        return $prefix . $nextNumber;
+    }
+}

app/Modules/Inventory/Models/InventoryTransaction.php

@@ -1,11 +1,10 @@
 <?php
 
-namespace App\Models;
+namespace App\Modules\Inventory\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
-use App\Models\Inventory;
-use App\Models\User;
+
 
 class InventoryTransaction extends Model
 {
@@ -16,6 +15,7 @@ class InventoryTransaction extends Model
         'inventory_id',
         'type',
         'quantity',
+        'unit_cost',
         'balance_before',
         'balance_after',
         'reason',
@@ -27,6 +27,7 @@ class InventoryTransaction extends Model
 
     protected $casts = [
         'actual_time' => 'datetime',
+        'unit_cost' => 'decimal:4',
     ];
 
     public function inventory(): \Illuminate\Database\Eloquent\Relations\BelongsTo
@@ -34,11 +35,6 @@ class InventoryTransaction extends Model
         return $this->belongsTo(Inventory::class);
     }
 
-    public function user(): \Illuminate\Database\Eloquent\Relations\BelongsTo
-    {
-        return $this->belongsTo(User::class);
-    }
-
     public function reference(): \Illuminate\Database\Eloquent\Relations\MorphTo
     {
         return $this->morphTo();

app/Modules/Inventory/Models/Product.php

@@ -0,0 +1,113 @@
+<?php
+
+namespace App\Modules\Inventory\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+
+class Product extends Model
+{
+    use HasFactory, LogsActivity, SoftDeletes;
+
+    protected $fillable = [
+        'code',
+        'name',
+        'category_id',
+        'brand',
+        'specification',
+        'base_unit_id',
+        'large_unit_id',
+        'conversion_rate',
+        'purchase_unit_id',
+    ];
+
+    protected $casts = [
+        'conversion_rate' => 'decimal:4',
+    ];
+
+    /**
+     * 取得該商品所屬的分類。
+     */
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(Category::class);
+    }
+
+    public function baseUnit(): BelongsTo
+    {
+        return $this->belongsTo(Unit::class, 'base_unit_id');
+    }
+
+    public function largeUnit(): BelongsTo
+    {
+        return $this->belongsTo(Unit::class, 'large_unit_id');
+    }
+
+    public function purchaseUnit(): BelongsTo
+    {
+        return $this->belongsTo(Unit::class, 'purchase_unit_id');
+    }
+
+
+
+    public function inventories(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(Inventory::class);
+    }
+
+    public function transactions(): HasMany
+    {
+        return $this->hasMany(InventoryTransaction::class);
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties;
+        $attributes = $properties['attributes'] ?? [];
+        $snapshot = $properties['snapshot'] ?? [];
+        
+        // 處理分類名稱快照
+        if (isset($attributes['category_id'])) {
+            $category = Category::find($attributes['category_id']);
+            $snapshot['category_name'] = $category ? $category->name : null;
+        }
+        
+        // 處理單位名稱快照
+        $unitFields = ['base_unit_id', 'large_unit_id', 'purchase_unit_id'];
+        foreach ($unitFields as $field) {
+            if (isset($attributes[$field])) {
+                $unit = Unit::find($attributes[$field]);
+                $nameKey = str_replace('_id', '_name', $field);
+                $snapshot[$nameKey] = $unit ? $unit->name : null;
+            }
+        }
+        
+        // 始終對自身名稱進行快照以便於上下文顯示（這樣日誌總是顯示 "可樂"）
+        $snapshot['name'] = $this->name;
+
+        $properties['attributes'] = $attributes;
+        $properties['snapshot'] = $snapshot;
+        $activity->properties = $properties;
+    }
+
+    public function warehouses(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
+    {
+        return $this->belongsToMany(Warehouse::class, 'inventories')
+            ->withPivot(['quantity', 'safety_stock', 'location'])
+            ->withTimestamps();
+    }
+}

app/Modules/Inventory/Models/Unit.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Modules\Inventory\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class Unit extends Model
+{
+    use HasFactory, LogsActivity;
+
+    protected $fillable = ['name', 'abbreviation'];
+
+    public function productsAsBase(): HasMany
+    {
+        return $this->hasMany(Product::class, 'base_unit_id');
+    }
+
+    public function productsAsLarge(): HasMany
+    {
+        return $this->hasMany(Product::class, 'large_unit_id');
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties;
+        
+        $snapshot = $properties['snapshot'] ?? [];
+        $snapshot['name'] = $this->name;
+        $properties['snapshot'] = $snapshot;
+
+        $activity->properties = $properties;
+    }
+}

app/Modules/Inventory/Models/Warehouse.php

@@ -0,0 +1,63 @@
+<?php
+
+namespace App\Modules\Inventory\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+
+class Warehouse extends Model
+{
+    /** @use HasFactory<\Database\Factories\WarehouseFactory> */
+    use HasFactory;
+    use \Spatie\Activitylog\Traits\LogsActivity;
+
+    protected $fillable = [
+        'code',
+        'name',
+        'type',
+        'address',
+        'description',
+        'is_sellable',
+        'license_plate',
+        'driver_name',
+    ];
+
+    protected $casts = [
+        'is_sellable' => 'boolean',
+        'type' => \App\Enums\WarehouseType::class,
+    ];
+
+    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    {
+        return \Spatie\Activitylog\LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties;
+        
+        $snapshot = $properties['snapshot'] ?? [];
+        $snapshot['name'] = $this->name;
+        $properties['snapshot'] = $snapshot;
+
+        $activity->properties = $properties;
+    }
+
+    public function inventories(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(Inventory::class);
+    }
+
+
+
+    public function products(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
+    {
+        return $this->belongsToMany(Product::class, 'inventories')
+            ->withPivot(['quantity', 'safety_stock', 'location'])
+            ->withTimestamps();
+    }
+}

app/Modules/Inventory/Models/WarehouseProductSafetyStock.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Modules\Inventory\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * 倉庫-商品安全庫存設定
+ * 每個倉庫-商品組合只有一筆安全庫存設定
+ */
+class WarehouseProductSafetyStock extends Model
+{
+    protected $table = 'warehouse_product_safety_stocks';
+
+    protected $fillable = [
+        'warehouse_id',
+        'product_id',
+        'safety_stock',
+    ];
+
+    protected $casts = [
+        'safety_stock' => 'decimal:2',
+    ];
+
+    /**
+     * 所屬倉庫
+     */
+    public function warehouse(): BelongsTo
+    {
+        return $this->belongsTo(Warehouse::class);
+    }
+
+    /**
+     * 所屬商品
+     */
+    public function product(): BelongsTo
+    {
+        return $this->belongsTo(Product::class);
+    }
+}

app/Modules/Inventory/Routes/web.php

@@ -0,0 +1,80 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Modules\Inventory\Controllers\CategoryController;
+use App\Modules\Inventory\Controllers\UnitController;
+use App\Modules\Inventory\Controllers\ProductController;
+use App\Modules\Inventory\Controllers\WarehouseController;
+use App\Modules\Inventory\Controllers\InventoryController;
+use App\Modules\Inventory\Controllers\SafetyStockController;
+use App\Modules\Inventory\Controllers\TransferOrderController;
+
+Route::middleware('auth')->group(function () {
+    
+    // 類別管理 (用於商品對話框) - 需要商品權限
+    Route::middleware('permission:products.view')->group(function () {
+        Route::get('/categories', [CategoryController::class, 'index'])->name('categories.index');
+        Route::post('/categories', [CategoryController::class, 'store'])->middleware('permission:products.create')->name('categories.store');
+        Route::put('/categories/{category}', [CategoryController::class, 'update'])->middleware('permission:products.edit')->name('categories.update');
+        Route::delete('/categories/{category}', [CategoryController::class, 'destroy'])->middleware('permission:products.delete')->name('categories.destroy');
+    });
+
+    // 單位管理 - 需要商品權限
+    Route::middleware('permission:products.create|products.edit')->group(function () {
+        Route::post('/units', [UnitController::class, 'store'])->name('units.store');
+        Route::put('/units/{unit}', [UnitController::class, 'update'])->name('units.update');
+        Route::delete('/units/{unit}', [UnitController::class, 'destroy'])->name('units.destroy');
+    });
+
+    // 商品管理
+    Route::middleware('permission:products.view')->group(function () {
+        Route::get('/products', [ProductController::class, 'index'])->name('products.index');
+        Route::post('/products', [ProductController::class, 'store'])->middleware('permission:products.create')->name('products.store');
+        Route::put('/products/{product}', [ProductController::class, 'update'])->middleware('permission:products.edit')->name('products.update');
+        Route::delete('/products/{product}', [ProductController::class, 'destroy'])->middleware('permission:products.delete')->name('products.destroy');
+    });
+
+    // 倉庫管理
+    Route::middleware('permission:warehouses.view')->group(function () {
+        Route::get('/warehouses', [WarehouseController::class, 'index'])->name('warehouses.index');
+        Route::post('/warehouses', [WarehouseController::class, 'store'])->middleware('permission:warehouses.create')->name('warehouses.store');
+        Route::put('/warehouses/{warehouse}', [WarehouseController::class, 'update'])->middleware('permission:warehouses.edit')->name('warehouses.update');
+        Route::delete('/warehouses/{warehouse}', [WarehouseController::class, 'destroy'])->middleware('permission:warehouses.delete')->name('warehouses.destroy');
+
+        // 倉庫庫存管理 - 需要庫存權限
+        Route::middleware('permission:inventory.view')->group(function () {
+            Route::get('/warehouses/{warehouse}/inventory', [InventoryController::class, 'index'])->name('warehouses.inventory.index');
+            Route::get('/warehouses/{warehouse}/inventory-history', [InventoryController::class, 'history'])->name('warehouses.inventory.history');
+            
+            Route::middleware('permission:inventory.adjust')->group(function () {
+                Route::get('/warehouses/{warehouse}/inventory/create', [InventoryController::class, 'create'])->name('warehouses.inventory.create');
+                Route::post('/warehouses/{warehouse}/inventory', [InventoryController::class, 'store'])->name('warehouses.inventory.store');
+                Route::get('/warehouses/{warehouse}/inventory/{inventoryId}/edit', [InventoryController::class, 'edit'])->name('warehouses.inventory.edit');
+                Route::put('/warehouses/{warehouse}/inventory/{inventoryId}', [InventoryController::class, 'update'])->name('warehouses.inventory.update');
+                Route::delete('/warehouses/{warehouse}/inventory/{inventoryId}', [InventoryController::class, 'destroy'])->name('warehouses.inventory.destroy');
+            });
+
+            // API: 取得商品在特定倉庫的所有批號
+            Route::get('/api/warehouses/{warehouse}/inventory/batches/{productId}', [InventoryController::class, 'getBatches'])
+                ->name('api.warehouses.inventory.batches');
+        });
+
+        // 安全庫存設定
+        Route::middleware('permission:inventory.view')->group(function () {
+            Route::get('/warehouses/{warehouse}/safety-stock', [SafetyStockController::class, 'index'])->name('warehouses.safety-stock.index');
+            Route::middleware('permission:inventory.safety_stock')->group(function () {
+                Route::post('/warehouses/{warehouse}/safety-stock', [SafetyStockController::class, 'store'])->name('warehouses.safety-stock.store');
+                Route::put('/warehouses/{warehouse}/safety-stock/{safetyStock}', [SafetyStockController::class, 'update'])->name('warehouses.safety-stock.update');
+                Route::delete('/warehouses/{warehouse}/safety-stock/{safetyStock}', [SafetyStockController::class, 'destroy'])->name('warehouses.safety-stock.destroy');
+            });
+        });
+    });
+
+    // 撥補單 (在庫存調撥時使用)
+    Route::middleware('permission:inventory.transfer')->group(function () {
+        Route::post('/transfer-orders', [TransferOrderController::class, 'store'])->name('transfer-orders.store');
+    });
+    Route::get('/api/warehouses/{warehouse}/inventories', [TransferOrderController::class, 'getWarehouseInventories'])
+        ->middleware('permission:inventory.view')
+        ->name('api.warehouses.inventories');
+});

app/Modules/Inventory/Services/InventoryService.php

@@ -0,0 +1,210 @@
+<?php
+
+namespace App\Modules\Inventory\Services;
+
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Inventory\Models\Inventory;
+use App\Modules\Inventory\Models\Warehouse;
+use App\Modules\Inventory\Models\Product;
+use Illuminate\Support\Facades\DB;
+
+class InventoryService implements InventoryServiceInterface
+{
+    public function getAllWarehouses()
+    {
+        return Warehouse::all();
+    }
+
+    public function getAllProducts()
+    {
+        return Product::with(['baseUnit'])->get();
+    }
+
+    public function getUnits()
+    {
+        return \App\Modules\Inventory\Models\Unit::all();
+    }
+
+    public function getInventoriesByIds(array $ids, array $with = [])
+    {
+        return Inventory::whereIn('id', $ids)->with($with)->get();
+    }
+
+    public function getProduct(int $id)
+    {
+        return Product::find($id);
+    }
+
+    public function getProductsByIds(array $ids)
+    {
+        return Product::whereIn('id', $ids)->get();
+    }
+
+    public function getProductsByName(string $name)
+    {
+        return Product::where('name', 'like', "%{$name}%")->get();
+    }
+
+    public function getWarehouse(int $id)
+    {
+        return Warehouse::find($id);
+    }
+
+    public function checkStock(int $productId, int $warehouseId, float $quantity): bool
+    {
+        $stock = Inventory::where('product_id', $productId)
+            ->where('warehouse_id', $warehouseId)
+            ->sum('quantity');
+            
+        return $stock >= $quantity;
+    }
+
+    public function decreaseStock(int $productId, int $warehouseId, float $quantity, ?string $reason = null): void
+    {
+        DB::transaction(function () use ($productId, $warehouseId, $quantity, $reason) {
+            $inventories = Inventory::where('product_id', $productId)
+                ->where('warehouse_id', $warehouseId)
+                ->where('quantity', '>', 0)
+                ->orderBy('arrival_date', 'asc')
+                ->get();
+
+            $remainingToDecrease = $quantity;
+
+            foreach ($inventories as $inventory) {
+                if ($remainingToDecrease <= 0) break;
+
+                $decreaseAmount = min($inventory->quantity, $remainingToDecrease);
+                $this->decreaseInventoryQuantity($inventory->id, $decreaseAmount, $reason);
+                $remainingToDecrease -= $decreaseAmount;
+            }
+
+            if ($remainingToDecrease > 0) {
+                // 這裡可以選擇報錯或允許負庫存，目前為了嚴謹拋出異常
+                throw new \Exception("庫存不足，無法扣除所有請求的數量。");
+            }
+        });
+    }
+
+    public function getInventoriesByWarehouse(int $warehouseId)
+    {
+        return Inventory::with(['product.baseUnit', 'product.largeUnit'])
+            ->where('warehouse_id', $warehouseId)
+            ->where('quantity', '>', 0)
+            ->orderBy('arrival_date', 'asc')
+            ->get();
+    }
+
+    public function createInventoryRecord(array $data)
+    {
+        return DB::transaction(function () use ($data) {
+            // 嘗試查找是否已有相同批號的庫存
+            $inventory = Inventory::where('warehouse_id', $data['warehouse_id'])
+                ->where('product_id', $data['product_id'])
+                ->where('batch_number', $data['batch_number'] ?? null)
+                ->first();
+
+            $balanceBefore = 0;
+
+            if ($inventory) {
+                // 若存在，則更新數量與相關資訊 (鎖定行以避免併發問題)
+                $inventory = Inventory::lockForUpdate()->find($inventory->id);
+                $balanceBefore = $inventory->quantity;
+                
+                // 加權平均成本計算 (可選，這裡先採簡單邏輯：若有新成本則更新，否則沿用)
+                // 若本次入庫有指定成本，則更新該批次單價 (假設同批號成本相同)
+                if (isset($data['unit_cost'])) {
+                    $inventory->unit_cost = $data['unit_cost'];
+                }
+                
+                $inventory->quantity += $data['quantity'];
+                // 更新總價值
+                $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
+
+                // 更新其他可能變更的欄位 (如最後入庫日)
+                $inventory->arrival_date = $data['arrival_date'] ?? $inventory->arrival_date;
+                $inventory->save();
+            } else {
+                // 若不存在，則建立新紀錄
+                $unitCost = $data['unit_cost'] ?? 0;
+                $inventory = Inventory::create([
+                    'warehouse_id' => $data['warehouse_id'],
+                    'product_id' => $data['product_id'],
+                    'quantity' => $data['quantity'],
+                    'unit_cost' => $unitCost,
+                    'total_value' => $data['quantity'] * $unitCost,
+                    'batch_number' => $data['batch_number'] ?? null,
+                    'box_number' => $data['box_number'] ?? null,
+                    'origin_country' => $data['origin_country'] ?? 'TW',
+                    'arrival_date' => $data['arrival_date'] ?? now(),
+                    'expiry_date' => $data['expiry_date'] ?? null,
+                    'quality_status' => $data['quality_status'] ?? 'normal',
+                    'source_purchase_order_id' => $data['source_purchase_order_id'] ?? null,
+                ]);
+            }
+
+            \App\Modules\Inventory\Models\InventoryTransaction::create([
+                'inventory_id' => $inventory->id,
+                'type' => '入庫',
+                'quantity' => $data['quantity'],
+                'unit_cost' => $inventory->unit_cost, // 記錄當下成本
+                'balance_before' => $balanceBefore,
+                'balance_after' => $inventory->quantity,
+                'reason' => $data['reason'] ?? '手動入庫',
+                'reference_type' => $data['reference_type'] ?? null,
+                'reference_id' => $data['reference_id'] ?? null,
+                'user_id' => auth()->id(),
+                'actual_time' => now(),
+            ]);
+
+            return $inventory;
+        });
+    }
+
+    public function decreaseInventoryQuantity(int $inventoryId, float $quantity, ?string $reason = null, ?string $referenceType = null, $referenceId = null): void
+    {
+        DB::transaction(function () use ($inventoryId, $quantity, $reason, $referenceType, $referenceId) {
+            $inventory = Inventory::lockForUpdate()->findOrFail($inventoryId);
+            $balanceBefore = $inventory->quantity;
+            
+            $inventory->decrement('quantity', $quantity); // decrement 不會自動觸發 total_value 更新
+            // 需要手動更新總價值
+            $inventory->refresh();
+            $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
+            $inventory->save();
+
+            \App\Modules\Inventory\Models\InventoryTransaction::create([
+                'inventory_id' => $inventory->id,
+                'type' => '出庫',
+                'quantity' => -$quantity,
+                'unit_cost' => $inventory->unit_cost, // 記錄出庫時的成本
+                'balance_before' => $balanceBefore,
+                'balance_after' => $inventory->quantity,
+                'reason' => $reason ?? '庫存扣減',
+                'reference_type' => $referenceType,
+                'reference_id' => $referenceId,
+                'user_id' => auth()->id(),
+                'actual_time' => now(),
+            ]);
+        });
+    }
+
+    public function getDashboardStats(): array
+    {
+        // 庫存總表 join 安全庫存表，計算低庫存
+        $lowStockCount = DB::table('warehouse_product_safety_stocks as ss')
+            ->join(DB::raw('(SELECT warehouse_id, product_id, SUM(quantity) as total_qty FROM inventories WHERE deleted_at IS NULL GROUP BY warehouse_id, product_id) as inv'),
+                function ($join) {
+                    $join->on('ss.warehouse_id', '=', 'inv.warehouse_id')
+                         ->on('ss.product_id', '=', 'inv.product_id');
+                })
+            ->whereRaw('inv.total_qty <= ss.safety_stock')
+            ->count();
+
+        return [
+            'productsCount' => Product::count(),
+            'warehousesCount' => Warehouse::count(),
+            'lowStockCount' => $lowStockCount,
+            'totalInventoryQuantity' => Inventory::sum('quantity'),
+        ];
+    }
+}

app/Modules/Procurement/Contracts/ProcurementServiceInterface.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Modules\Procurement\Contracts;
+
+use Illuminate\Support\Collection;
+
+interface ProcurementServiceInterface
+{
+    /**
+     * Get purchase orders within a date range.
+     * 
+     * @param string $start
+     * @param string $end
+     * @param array $statuses
+     * @return Collection
+     */
+    public function getPurchaseOrdersByDate(string $start, string $end, array $statuses = ['received', 'completed']): Collection;
+
+    /**
+     * Get purchase orders by multiple IDs.
+     * 
+     * @param array $ids
+     * @param array $with
+     * @return Collection
+     */
+    public function getPurchaseOrdersByIds(array $ids, array $with = []): Collection;
+
+    /**
+     * Get statistics for the dashboard.
+     * 
+     * @return array
+     */
+    public function getDashboardStats(): array;
+}

app/Modules/Procurement/Controllers/PurchaseOrderController.php

@@ -0,0 +1,653 @@
+<?php
+
+namespace App\Modules\Procurement\Controllers;
+
+use App\Http\Controllers\Controller;
+
+use App\Modules\Procurement\Models\PurchaseOrder;
+use App\Modules\Procurement\Models\Vendor;
+// use App\Modules\Inventory\Models\Warehouse; // REFACTORED: 移除直接依賴
+use App\Modules\Inventory\Contracts\InventoryServiceInterface; // NEW: 使用契約
+use App\Modules\Core\Contracts\CoreServiceInterface; // NEW: 使用核心服務契約
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Illuminate\Support\Facades\DB;
+
+class PurchaseOrderController extends Controller
+{
+    protected $inventoryService;
+    protected $coreService;
+
+    public function __construct(InventoryServiceInterface $inventoryService, CoreServiceInterface $coreService)
+    {
+        $this->inventoryService = $inventoryService;
+        $this->coreService = $coreService;
+    }
+
+    public function index(Request $request)
+    {
+        // 1. 從關聯中移除 'warehouse' 與 'user'
+        $query = PurchaseOrder::with(['vendor']);
+
+        // 搜尋
+        if ($request->search) {
+            $query->where(function($q) use ($request) {
+                $q->where('code', 'like', "%{$request->search}%")
+                  ->orWhereHas('vendor', function($vq) use ($request) {
+                      $vq->where('name', 'like', "%{$request->search}%");
+                  });
+            });
+        }
+
+        // 篩選
+        if ($request->status && $request->status !== 'all') {
+            $query->where('status', $request->status);
+        }
+
+        if ($request->warehouse_id && $request->warehouse_id !== 'all') {
+            $query->where('warehouse_id', $request->warehouse_id);
+        }
+
+        // 日期範圍
+        if ($request->date_start) {
+            $query->whereDate('created_at', '>=', $request->date_start);
+        }
+
+        if ($request->date_end) {
+            $query->whereDate('created_at', '<=', $request->date_end);
+        }
+
+        // 排序
+        $sortField = $request->sort_field ?? 'id';
+        $sortDirection = $request->sort_direction ?? 'desc';
+        $allowedSortFields = ['id', 'code', 'status', 'total_amount', 'created_at', 'expected_delivery_date'];
+        
+        if (in_array($sortField, $allowedSortFields)) {
+            $query->orderBy($sortField, $sortDirection);
+        }
+
+        $perPage = $request->input('per_page', 10);
+        $orders = $query->paginate($perPage)->withQueryString();
+
+        // 2. 手動注入倉庫與使用者資料
+        $warehouses = $this->inventoryService->getAllWarehouses();
+        $userIds = $orders->getCollection()->pluck('user_id')->unique()->toArray();
+        $users = $this->coreService->getUsersByIds($userIds)->keyBy('id');
+
+        $orders->getCollection()->transform(function ($order) use ($warehouses, $users) {
+            // 水和倉庫
+            $warehouse = $warehouses->firstWhere('id', $order->warehouse_id);
+            $order->setRelation('warehouse', $warehouse);
+
+            // 水和使用者
+            $user = $users->get($order->user_id);
+            $order->setRelation('user', $user);
+
+            // 轉換為前端期望的格式 (camelCase)
+            return (object) [
+                'id' => (string) $order->id,
+                'poNumber' => $order->code,
+                'supplierId' => (string) $order->vendor_id,
+                'supplierName' => $order->vendor?->name ?? 'Unknown',
+                'orderDate' => $order->order_date?->format('Y-m-d'), // 新增
+                'expectedDate' => $order->expected_delivery_date?->toISOString(),
+                'status' => $order->status,
+                'totalAmount' => (float) $order->total_amount,
+                'taxAmount' => (float) $order->tax_amount,
+                'grandTotal' => (float) $order->grand_total,
+                'createdAt' => $order->created_at->toISOString(),
+                'createdBy' => $user?->name ?? 'System',
+                'warehouse_id' => (int) $order->warehouse_id,
+                'warehouse_name' => $warehouse?->name ?? 'Unknown',
+                'remark' => $order->remark,
+            ];
+        });
+
+
+        return Inertia::render('PurchaseOrder/Index', [
+            'orders' => $orders,
+            'filters' => $request->only(['search', 'status', 'warehouse_id', 'date_start', 'date_end', 'sort_field', 'sort_direction', 'per_page']),
+            'warehouses' => $warehouses->map(fn($w)=>(object)['id'=>$w->id, 'name'=>$w->name]), 
+        ]);
+    }
+
+    public function create()
+    {
+        // 1. 獲取廠商（無關聯）
+        $vendors = Vendor::all();
+
+        // 2. 手動注入：獲取 Pivot 資料
+        $vendorIds = $vendors->pluck('id')->toArray();
+        $pivots = DB::table('product_vendor')->whereIn('vendor_id', $vendorIds)->get();
+        $productIds = $pivots->pluck('product_id')->unique()->toArray();
+        
+        // 3. 從服務獲取商品
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+
+        // 4. 重建前端結構
+        $vendors = $vendors->map(function ($vendor) use ($pivots, $products) {
+            $vendorProductPivots = $pivots->where('vendor_id', $vendor->id);
+            
+            $commonProducts = $vendorProductPivots->map(function($pivot) use ($products) {
+                $product = $products[$pivot->product_id] ?? null;
+                if (!$product) return null;
+                
+                return [
+                    'productId' => (string) $product->id,
+                    'productName' => $product->name,
+                    'base_unit_id' => $product->base_unit_id,
+                    'base_unit_name' => $product->baseUnit?->name,
+                    'large_unit_id' => $product->large_unit_id,
+                    'large_unit_name' => $product->largeUnit?->name,
+                    'purchase_unit_id' => $product->purchase_unit_id,
+                    'conversion_rate' => (float) $product->conversion_rate,
+                    'lastPrice' => (float) $pivot->last_price,
+                ];
+            })->filter()->values();
+
+            return [
+                'id' => (string) $vendor->id,
+                'name' => $vendor->name,
+                'commonProducts' => $commonProducts
+            ];
+        });
+
+        $warehouses = $this->inventoryService->getAllWarehouses()->map(function ($w) {
+            return [
+                'id' => (string) $w->id,
+                'name' => $w->name,
+            ];
+        });
+
+        return Inertia::render('PurchaseOrder/Create', [
+            'suppliers' => $vendors,
+            'warehouses' => $warehouses,
+        ]);
+    }
+
+    public function store(Request $request)
+    {
+        $validated = $request->validate([
+            'vendor_id' => 'required|exists:vendors,id',
+            'warehouse_id' => 'required|exists:warehouses,id',
+            'order_date' => 'required|date', // 新增驗證
+            'expected_delivery_date' => 'nullable|date',
+            'remark' => 'nullable|string',
+            'invoice_number' => ['nullable', 'string', 'max:11', 'regex:/^[A-Z]{2}-\d{8}$/'],
+            'invoice_date' => 'nullable|date',
+            'invoice_amount' => 'nullable|numeric|min:0',
+            'items' => 'required|array|min:1',
+            'items.*.productId' => 'required|exists:products,id',
+            'items.*.quantity' => 'required|numeric|min:0.01',
+            'items.*.subtotal' => 'required|numeric|min:0', // 總金額
+            'items.*.unitId' => 'nullable|exists:units,id',
+            'tax_amount' => 'nullable|numeric|min:0',
+        ]);
+
+        try {
+            DB::beginTransaction();
+
+            // 生成單號：YYYYMMDD001
+            $today = now()->format('Ymd');
+            $lastOrder = PurchaseOrder::where('code', 'like', $today . '%')
+                ->lockForUpdate() // 鎖定以避免並發衝突
+                ->orderBy('code', 'desc')
+                ->first();
+
+            if ($lastOrder) {
+                // 取得最後 3 碼序號並加 1
+                $lastSequence = intval(substr($lastOrder->code, -3));
+                $sequence = str_pad($lastSequence + 1, 3, '0', STR_PAD_LEFT);
+            } else {
+                $sequence = '001';
+            }
+            $code = $today . $sequence;
+
+            $totalAmount = 0;
+            foreach ($validated['items'] as $item) {
+                $totalAmount += $item['subtotal'];
+            }
+
+            // 稅額計算
+            $taxAmount = isset($validated['tax_amount']) ? $validated['tax_amount'] : round($totalAmount * 0.05, 2);
+            $grandTotal = $totalAmount + $taxAmount;
+
+            // 確保有一個有效的使用者 ID
+            $userId = auth()->id();
+            if (!$userId) {
+                $user = $this->coreService->ensureSystemUserExists();                $userId = $user->id;
+            }
+
+            $order = PurchaseOrder::create([
+                'code' => $code,
+                'vendor_id' => $validated['vendor_id'],
+                'warehouse_id' => $validated['warehouse_id'],
+                'user_id' => $userId,
+                'status' => 'draft',
+                'order_date' => $validated['order_date'], // 新增
+                'expected_delivery_date' => $validated['expected_delivery_date'],
+                'total_amount' => $totalAmount,
+                'tax_amount' => $taxAmount,
+                'grand_total' => $grandTotal,
+                'remark' => $validated['remark'],
+                'invoice_number' => $validated['invoice_number'] ?? null,
+                'invoice_date' => $validated['invoice_date'] ?? null,
+                'invoice_amount' => $validated['invoice_amount'] ?? null,
+            ]);
+
+            foreach ($validated['items'] as $item) {
+                // 反算單價
+                $unitPrice = $item['quantity'] > 0 ? $item['subtotal'] / $item['quantity'] : 0;
+
+                $order->items()->create([
+                    'product_id' => $item['productId'],
+                    'quantity' => $item['quantity'],
+                    'unit_id' => $item['unitId'] ?? null, 
+                    'unit_price' => $unitPrice,
+                    'subtotal' => $item['subtotal'],
+                ]);
+            }
+
+            DB::commit();
+
+            return redirect()->route('purchase-orders.index')->with('success', '採購單已成功建立');
+
+        } catch (\Exception $e) {
+            DB::rollBack();
+            return back()->withErrors(['error' => '建立失敗：' . $e->getMessage()]);
+        }
+    }
+
+    public function show($id)
+    {
+        $order = PurchaseOrder::with(['vendor', 'items'])->findOrFail($id);
+        
+        // 手動注入
+        $order->setRelation('warehouse', $this->inventoryService->getWarehouse($order->warehouse_id));
+        $order->setRelation('user', $this->coreService->getUser($order->user_id));
+
+        $productIds = $order->items->pluck('product_id')->unique()->toArray();
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+
+        $formattedItems = $order->items->map(function ($item) use ($order, $products) {
+            $product = $products[$item->product_id] ?? null;
+            return (object) [
+                'productId' => (string) $item->product_id,
+                'productName' => $product?->name ?? 'Unknown',
+                'quantity' => (float) $item->quantity,
+                'unitId' => $item->unit_id,
+                'base_unit_id' => $product?->base_unit_id,
+                'base_unit_name' => $product?->baseUnit?->name,
+                'large_unit_id' => $product?->large_unit_id,
+                'large_unit_name' => $product?->largeUnit?->name,
+                'purchase_unit_id' => $product?->purchase_unit_id,
+                'conversion_rate' => (float) ($product?->conversion_rate ?? 1),
+                'selectedUnit' => ($item->unit_id && $product?->large_unit_id && $item->unit_id == $product->large_unit_id) ? 'large' : 'base',
+                'unitPrice' => (float) $item->unit_price,
+                'previousPrice' => (float) (DB::table('product_vendor')->where('vendor_id', $order->vendor_id)->where('product_id', $item->product_id)->value('last_price') ?? 0),
+                'subtotal' => (float) $item->subtotal,
+            ];
+        });
+
+        $formattedOrder = (object) [
+            'id' => (string) $order->id,
+            'poNumber' => $order->code,
+            'supplierId' => (string) $order->vendor_id,
+            'supplierName' => $order->vendor?->name ?? 'Unknown',
+            'orderDate' => $order->order_date?->format('Y-m-d'), // 新增
+            'expectedDate' => $order->expected_delivery_date?->toISOString(),
+            'status' => $order->status,
+            'items' => $formattedItems,
+            'totalAmount' => (float) $order->total_amount,
+            'taxAmount' => (float) $order->tax_amount,
+            'grandTotal' => (float) $order->grand_total,
+            'createdAt' => $order->created_at->toISOString(),
+            'createdBy' => $order->user?->name ?? 'System',
+            'warehouse_id' => (int) $order->warehouse_id,
+            'warehouse_name' => $order->warehouse?->name ?? 'Unknown',
+            'remark' => $order->remark,
+            'invoiceNumber' => $order->invoice_number,
+            'invoiceDate' => $order->invoice_date,
+            'invoiceAmount' => (float) $order->invoice_amount,
+        ];
+
+        return Inertia::render('PurchaseOrder/Show', [
+            'order' => $formattedOrder
+        ]);
+    }
+
+    public function edit($id)
+    {
+        // 1. 獲取訂單
+        $order = PurchaseOrder::with(['items'])->findOrFail($id);
+
+        // 2. 獲取廠商與商品（與 create 邏輯一致）
+        $vendors = Vendor::all();
+        $vendorIds = $vendors->pluck('id')->toArray();
+        $pivots = DB::table('product_vendor')->whereIn('vendor_id', $vendorIds)->get();
+        $productIds = $pivots->pluck('product_id')->unique()->toArray();
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+
+        $vendors = $vendors->map(function ($vendor) use ($pivots, $products) {
+            $vendorProductPivots = $pivots->where('vendor_id', $vendor->id);
+            $commonProducts = $vendorProductPivots->map(function($pivot) use ($products) {
+                $product = $products[$pivot->product_id] ?? null;
+                if (!$product) return null;
+                return [
+                    'productId' => (string) $product->id,
+                    'productName' => $product->name,
+                    'base_unit_id' => $product->base_unit_id,
+                    'base_unit_name' => $product->baseUnit?->name,
+                    'large_unit_id' => $product->large_unit_id,
+                    'large_unit_name' => $product->largeUnit?->name,
+                    'purchase_unit_id' => $product->purchase_unit_id,
+                    'conversion_rate' => (float) $product->conversion_rate,
+                    'lastPrice' => (float) $pivot->last_price,
+                ];
+            })->filter()->values();
+
+            return [
+                'id' => (string) $vendor->id,
+                'name' => $vendor->name,
+                'commonProducts' => $commonProducts
+            ];
+        });
+
+        // 3. 獲取倉庫
+        $warehouses = $this->inventoryService->getAllWarehouses()->map(function ($w) {
+            return [
+                'id' => (string) $w->id,
+                'name' => $w->name,
+            ];
+        });
+
+        // 4. 注入訂單項目特定資料
+        // 2. 注入訂單項目
+        $itemProductIds = $order->items->pluck('product_id')->toArray();
+        $itemProducts = $this->inventoryService->getProductsByIds($itemProductIds)->keyBy('id');
+        
+        $vendorId = $order->vendor_id;
+        $formattedItems = $order->items->map(function ($item) use ($vendorId, $itemProducts) {
+             $product = $itemProducts[$item->product_id] ?? null;
+             return (object) [
+                'productId' => (string) $item->product_id,
+                'productName' => $product?->name ?? 'Unknown',
+                'quantity' => (float) $item->quantity,
+                'unitId' => $item->unit_id,
+                'base_unit_id' => $product?->base_unit_id,
+                'base_unit_name' => $product?->baseUnit?->name,
+                'large_unit_id' => $product?->large_unit_id,
+                'large_unit_name' => $product?->largeUnit?->name,
+                'conversion_rate' => (float) ($product?->conversion_rate ?? 1),
+                'selectedUnit' => ($item->unit_id && $product?->large_unit_id && $item->unit_id == $product->large_unit_id) ? 'large' : 'base',
+                'unitPrice' => (float) $item->unit_price,
+                'previousPrice' => (float) (DB::table('product_vendor')->where('vendor_id', $vendorId)->where('product_id', $item->product_id)->value('last_price') ?? 0),
+                'subtotal' => (float) $item->subtotal,
+            ];
+        });
+
+        $formattedOrder = (object) [
+            'id' => (string) $order->id,
+            'poNumber' => $order->code,
+            'supplierId' => (string) $order->vendor_id,
+            'warehouse_id' => (int) $order->warehouse_id,
+            'orderDate' => $order->order_date?->format('Y-m-d'), // 新增
+            'expectedDate' => $order->expected_delivery_date?->format('Y-m-d'),
+            'status' => $order->status,
+            'items' => $formattedItems,
+            'remark' => $order->remark,
+            'invoiceNumber' => $order->invoice_number,
+            'invoiceDate' => $order->invoice_date,
+            'invoiceAmount' => (float) $order->invoice_amount,
+            'taxAmount' => (float) $order->tax_amount,
+        ];
+
+        return Inertia::render('PurchaseOrder/Create', [
+            'order' => $formattedOrder,
+            'suppliers' => $vendors,
+            'warehouses' => $warehouses,
+        ]);
+    }
+
+    public function update(Request $request, $id)
+    {
+        $order = PurchaseOrder::findOrFail($id);
+
+        $validated = $request->validate([
+            'vendor_id' => 'required|exists:vendors,id',
+            'warehouse_id' => 'required|exists:warehouses,id',
+            'order_date' => 'required|date', // 新增驗證
+            'expected_delivery_date' => 'nullable|date',
+            'remark' => 'nullable|string',
+            'status' => 'required|string|in:draft,pending,processing,shipping,confirming,completed,cancelled',
+            'invoice_number' => ['nullable', 'string', 'max:11', 'regex:/^[A-Z]{2}-\d{8}$/'],
+            'invoice_date' => 'nullable|date',
+            'invoice_amount' => 'nullable|numeric|min:0',
+            'items' => 'required|array|min:1',
+            'items.*.productId' => 'required|exists:products,id',
+            'items.*.quantity' => 'required|numeric|min:0.01',
+            'items.*.subtotal' => 'required|numeric|min:0', // 總金額
+            'items.*.unitId' => 'nullable|exists:units,id',
+            // 允許 tax_amount 和 taxAmount 以保持相容性
+            'tax_amount' => 'nullable|numeric|min:0', 
+            'taxAmount' => 'nullable|numeric|min:0',
+        ]);
+
+        try {
+            DB::beginTransaction();
+
+            $totalAmount = 0;
+            foreach ($validated['items'] as $item) {
+                $totalAmount += $item['subtotal'];
+            }
+
+            // 稅額計算（處理兩個鍵）
+            $inputTax = $validated['tax_amount'] ?? $validated['taxAmount'] ?? null;
+            $taxAmount = !is_null($inputTax) ? $inputTax : round($totalAmount * 0.05, 2);
+            $grandTotal = $totalAmount + $taxAmount;
+
+            // 1. 填充屬性但暫不儲存以捕捉變更
+            $order->fill([
+                'vendor_id' => $validated['vendor_id'],
+                'warehouse_id' => $validated['warehouse_id'],
+                'order_date' => $validated['order_date'], // 新增
+                'expected_delivery_date' => $validated['expected_delivery_date'],
+                'total_amount' => $totalAmount,
+                'tax_amount' => $taxAmount,
+                'grand_total' => $grandTotal,
+                'remark' => $validated['remark'],
+                'status' => $validated['status'],
+                'invoice_number' => $validated['invoice_number'] ?? null,
+                'invoice_date' => $validated['invoice_date'] ?? null,
+                'invoice_amount' => $validated['invoice_amount'] ?? null,
+            ]);
+
+            // 捕捉變更屬性以進行手動記錄
+            $dirty = $order->getDirty();
+            $oldAttributes = [];
+            $newAttributes = [];
+
+            foreach ($dirty as $key => $value) {
+                $oldAttributes[$key] = $order->getOriginal($key);
+                $newAttributes[$key] = $value;
+            }
+
+            // 儲存但不觸發事件（防止重複記錄）
+            $order->saveQuietly();
+
+            // 2. 捕捉包含商品名稱的舊項目以進行比對
+            $oldItems = $order->items()->with('product', 'unit')->get()->map(function($item) {
+                return [
+                    'id' => $item->id,
+                    'product_id' => $item->product_id,
+                    'product_name' => $item->product?->name,
+                    'quantity' => (float) $item->quantity,
+                    'unit_id' => $item->unit_id,
+                    'unit_name' => $item->unit?->name,
+                    'subtotal' => (float) $item->subtotal,
+                ];
+            })->keyBy('product_id');
+
+            // 同步項目（原始邏輯）
+            $order->items()->delete();
+            
+            $newItemsData = [];
+            foreach ($validated['items'] as $item) {
+                // 反算單價
+                $unitPrice = $item['quantity'] > 0 ? $item['subtotal'] / $item['quantity'] : 0;
+
+                $newItem = $order->items()->create([
+                    'product_id' => $item['productId'],
+                    'quantity' => $item['quantity'],
+                    'unit_id' => $item['unitId'] ?? null, 
+                    'unit_price' => $unitPrice,
+                    'subtotal' => $item['subtotal'],
+                ]);
+                $newItemsData[] = $newItem;
+            }
+
+            // 3. 計算項目差異
+            $itemDiffs = [
+                'added' => [],
+                'removed' => [],
+                'updated' => [],
+            ];
+
+            // 重新獲取新項目以確保擁有最新的關聯
+            $newItemsFormatted = $order->items()->with('product', 'unit')->get()->map(function($item) {
+                return [
+                    'product_id' => $item->product_id,
+                    'product_name' => $item->product?->name,
+                    'quantity' => (float) $item->quantity,
+                    'unit_id' => $item->unit_id,
+                    'unit_name' => $item->unit?->name,
+                    'subtotal' => (float) $item->subtotal,
+                ];
+            })->keyBy('product_id');
+
+            // 找出已移除的項目
+            foreach ($oldItems as $productId => $oldItem) {
+                if (!$newItemsFormatted->has($productId)) {
+                    $itemDiffs['removed'][] = $oldItem;
+                }
+            }
+
+            // 找出新增和更新的項目
+            foreach ($newItemsFormatted as $productId => $newItem) {
+                if (!$oldItems->has($productId)) {
+                    $itemDiffs['added'][] = $newItem;
+                } else {
+                    $oldItem = $oldItems[$productId];
+                    // 比對欄位
+                    if (
+                        $oldItem['quantity'] != $newItem['quantity'] || 
+                        $oldItem['unit_id'] != $newItem['unit_id'] ||
+                        $oldItem['subtotal'] != $newItem['subtotal']
+                    ) {
+                        $itemDiffs['updated'][] = [
+                            'product_name' => $newItem['product_name'],
+                            'old' => [
+                                'quantity' => $oldItem['quantity'],
+                                'unit_name' => $oldItem['unit_name'],
+                                'subtotal' => $oldItem['subtotal'],
+                            ],
+                            'new' => [
+                                'quantity' => $newItem['quantity'],
+                                'unit_name' => $newItem['unit_name'],
+                                'subtotal' => $newItem['subtotal'],
+                            ]
+                        ];
+                    }
+                }
+            }
+
+            // 4. 手動記錄活動（單一整合記錄）
+            // 如果有屬性變更或項目變更則記錄
+            if (!empty($newAttributes) || !empty($itemDiffs['added']) || !empty($itemDiffs['removed']) || !empty($itemDiffs['updated'])) {
+                activity()
+                    ->performedOn($order)
+                    ->causedBy(auth()->user())
+                    ->event('updated')
+                    ->withProperties([
+                        'attributes' => $newAttributes,
+                        'old' => $oldAttributes,
+                        'items_diff' => $itemDiffs,
+                        'snapshot' => [
+                            'po_number' => $order->code,
+                            'vendor_name' => $order->vendor?->name,
+                            'warehouse_name' => $order->warehouse?->name,
+                            'user_name' => $order->user?->name,
+                        ]
+                    ])
+                    ->log('updated');
+            }
+
+            DB::commit();
+
+            return redirect()->route('purchase-orders.index')->with('success', '採購單已更新');
+
+        } catch (\Exception $e) {
+            DB::rollBack();
+            return back()->withErrors(['error' => '更新失敗：' . $e->getMessage()]);
+        }
+    }
+
+    public function destroy($id)
+    {
+        try {
+            DB::beginTransaction();
+            
+            $order = PurchaseOrder::with(['items'])->findOrFail($id);
+            
+            // 為記錄注入資料
+            $productIds = $order->items->pluck('product_id')->unique()->toArray();
+            $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+
+            // 捕捉項目以進行記錄
+            $items = $order->items->map(function ($item) use ($products) {
+                $product = $products[$item->product_id] ?? null;
+                return [
+                    'product_name' => $product?->name ?? 'Unknown',
+                    'quantity' => floatval($item->quantity),
+                    'unit_name' => 'N/A', 
+                    'subtotal' => floatval($item->subtotal),
+                ];
+            })->toArray();
+
+            // 手動記錄包含項目的刪除操作
+            activity()
+                ->performedOn($order)
+                ->causedBy(auth()->user())
+                ->event('deleted')
+                ->withProperties([
+                    'attributes' => $order->getAttributes(),
+                    'items_diff' => [
+                        'added' => [],
+                        'removed' => $items,
+                        'updated' => [],
+                    ],
+                    'snapshot' => [
+                        'po_number' => $order->code,
+                        'vendor_name' => $order->vendor?->name,
+                        'warehouse_name' => $order->warehouse?->name,
+                        'user_name' => $order->user?->name,
+                    ]
+                ])
+                ->log('deleted');
+
+            // 對此操作停用自動記錄
+            $order->disableLogging();
+            
+            // 先刪除關聯項目
+            $order->items()->delete();
+            $order->delete();
+            
+            DB::commit();
+            
+            return redirect()->route('purchase-orders.index')->with('success', '採購單已刪除');
+        } catch (\Exception $e) {
+            DB::rollBack();
+            return back()->withErrors(['error' => '刪除失敗：' . $e->getMessage()]);
+        }
+    }
+}

app/Modules/Procurement/Controllers/VendorController.php

@@ -0,0 +1,194 @@
+<?php
+
+namespace App\Modules\Procurement\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Procurement\Models\Vendor;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Inertia\Response;
+
+class VendorController extends Controller
+{
+    public function __construct(
+        protected InventoryServiceInterface $inventoryService
+    ) {}
+
+    /**
+     * 顯示資源列表。
+     */
+    public function index(Request $request): Response
+    {
+        $query = Vendor::query();
+
+        if ($request->filled('search')) {
+            $search = $request->search;
+            $query->where(function ($q) use ($search) {
+                $q->where('name', 'like', "%{$search}%")
+                  ->orWhere('code', 'like', "%{$search}%")
+                  ->orWhere('tax_id', 'like', "%{$search}%")
+                  ->orWhere('owner', 'like', "%{$search}%")
+                  ->orWhere('contact_name', 'like', "%{$search}%");
+            });
+        }
+
+        $sortField = $request->input('sort_field', 'id');
+        $sortDirection = $request->input('sort_direction', 'desc');
+
+        $allowedSorts = ['id', 'code', 'name', 'owner', 'contact_name', 'phone'];
+        if (!in_array($sortField, $allowedSorts)) {
+            $sortField = 'id';
+        }
+        if (!in_array(strtolower($sortDirection), ['asc', 'desc'])) {
+            $sortDirection = 'desc';
+        }
+
+        $perPage = $request->input('per_page', 10);
+
+        $vendors = $query->orderBy($sortField, $sortDirection)
+            ->paginate($perPage)
+            ->withQueryString();
+
+        $vendors->getCollection()->transform(function ($vendor) {
+            return (object) [
+                'id' => (string) $vendor->id,
+                'code' => $vendor->code,
+                'name' => $vendor->name,
+                'shortName' => $vendor->short_name,
+                'taxId' => $vendor->tax_id,
+                'owner' => $vendor->owner,
+                'contactName' => $vendor->contact_name,
+                'phone' => $vendor->phone,
+                'tel' => $vendor->tel,
+                'email' => $vendor->email,
+                'address' => $vendor->address,
+                'remark' => $vendor->remark,
+            ];
+        });
+
+        return Inertia::render('Vendor/Index', [
+            'vendors' => $vendors,
+            'filters' => $request->only(['search', 'sort_field', 'sort_direction', 'per_page']),
+        ]);
+    }
+
+    /**
+     * 顯示指定資源。
+     */
+    public function show(Vendor $vendor): Response
+    {
+        // $vendor->load(['products.baseUnit', 'products.largeUnit']); // REMOVED: Cross-module relation
+        
+        // 1. 獲取關聯的 Product IDs 與 Pivot Data
+        $pivots = \Illuminate\Support\Facades\DB::table('product_vendor')
+            ->where('vendor_id', $vendor->id)
+            ->get();
+            
+        $productIds = $pivots->pluck('product_id')->toArray();
+        
+        // 2. 透過 Service 獲取 Products
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+        
+        $supplyProducts = $pivots->map(function ($pivot) use ($products) {
+            $product = $products->get($pivot->product_id);
+            if (!$product) return null;
+            
+            return (object) [
+                'id' => (string) $pivot->id,
+                'productId' => (string) $product->id,
+                'productName' => $product->name,
+                'unit' => $product->baseUnit?->name ?? 'N/A',
+                'baseUnit' => $product->baseUnit?->name,
+                'largeUnit' => $product->largeUnit?->name,
+                'conversionRate' => (float) $product->conversion_rate,
+                'lastPrice' => (float) $pivot->last_price,
+            ];
+        })->filter()->values();
+
+        $formattedVendor = (object) [
+            'id' => (string) $vendor->id,
+            'code' => $vendor->code,
+            'name' => $vendor->name,
+            'shortName' => $vendor->short_name,
+            'taxId' => $vendor->tax_id,
+            'owner' => $vendor->owner,
+            'contactName' => $vendor->contact_name,
+            'phone' => $vendor->phone,
+            'tel' => $vendor->tel,
+            'email' => $vendor->email,
+            'address' => $vendor->address,
+            'remark' => $vendor->remark,
+            'supplyProducts' => $supplyProducts,
+        ];
+
+        return Inertia::render('Vendor/Show', [
+            'vendor' => $formattedVendor,
+            'products' => $this->inventoryService->getAllProducts(), // 使用已有的服務獲取所有商品供選取
+        ]);
+    }
+
+    /**
+     * 將新建立的資源儲存到儲存體中。
+     */
+    public function store(Request $request)
+    {
+        $validated = $request->validate([
+            'name' => 'required|string|max:255',
+            'short_name' => 'nullable|string|max:255',
+            'tax_id' => 'nullable|string|max:8',
+            'owner' => 'nullable|string|max:255',
+            'contact_name' => 'nullable|string|max:255',
+            'tel' => 'nullable|string|max:50',
+            'phone' => 'nullable|string|max:50',
+            'email' => 'nullable|email|max:255',
+            'address' => 'nullable|string',
+            'remark' => 'nullable|string',
+        ]);
+
+        // 自動產生代碼
+        $prefix = 'V';
+        $lastVendor = Vendor::latest('id')->first();
+        $nextId = $lastVendor ? $lastVendor->id + 1 : 1;
+        $code = $prefix . str_pad($nextId, 5, '0', STR_PAD_LEFT);
+
+        $validated['code'] = $code;
+        
+        Vendor::create($validated);
+
+        return redirect()->back()->with('success', '廠商已建立');
+    }
+
+    /**
+     * 更新儲存體中的指定資源。
+     */
+    public function update(Request $request, Vendor $vendor)
+    {
+         $validated = $request->validate([
+            'name' => 'required|string|max:255',
+            'short_name' => 'nullable|string|max:255',
+            'tax_id' => 'nullable|string|max:8',
+            'owner' => 'nullable|string|max:255',
+            'contact_name' => 'nullable|string|max:255',
+            'tel' => 'nullable|string|max:50',
+            'phone' => 'nullable|string|max:50',
+            'email' => 'nullable|email|max:255',
+            'address' => 'nullable|string',
+            'remark' => 'nullable|string',
+        ]);
+
+        $vendor->update($validated);
+
+        return redirect()->back()->with('success', '廠商資料已更新');
+    }
+
+    /**
+     * 從儲存體中移除指定資源。
+     */
+    public function destroy(Vendor $vendor)
+    {
+        $vendor->delete();
+
+        return redirect()->back()->with('success', '廠商已刪除');
+    }
+}

app/Modules/Procurement/Controllers/VendorProductController.php

@@ -0,0 +1,130 @@
+<?php
+
+namespace App\Modules\Procurement\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Procurement\Models\Vendor;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Log;
+
+class VendorProductController extends Controller
+{
+    public function __construct(
+        protected InventoryServiceInterface $inventoryService
+    ) {}
+
+    /**
+     * 新增供貨商品 (Attach)
+     */
+    public function store(Request $request, Vendor $vendor)
+    {
+        $validated = $request->validate([
+            'product_id' => 'required|exists:products,id',
+            'last_price' => 'nullable|numeric|min:0',
+        ]);
+
+        // 檢查是否已存在
+        if ($vendor->products()->where('product_id', $validated['product_id'])->exists()) {
+            return redirect()->back()->with('error', '該商品已在供貨清單中');
+        }
+
+        $vendor->products()->attach($validated['product_id'], [
+            'last_price' => $validated['last_price'] ?? null
+        ]);
+
+        // 記錄操作
+        $product = $this->inventoryService->getProduct($validated['product_id']);
+        activity()
+            ->performedOn($vendor)
+            ->withProperties([
+                'attributes' => [
+                    'product_name' => $product->name,
+                    'last_price' => $validated['last_price'] ?? null,
+                ],
+                'sub_subject' => '供貨商品',
+                'snapshot' => [
+                    'name' => "{$vendor->name}-{$product->name}", // 顯示例如：台積電-紅糖
+                    'vendor_name' => $vendor->name,
+                    'product_name' => $product->name,
+                ]
+            ])
+            ->event('created')
+            ->log('新增供貨商品');
+
+        return redirect()->back()->with('success', '供貨商品已新增');
+    }
+
+    /**
+     * 更新供貨商品資訊 (Update Pivot)
+     */
+    public function update(Request $request, Vendor $vendor, $productId)
+    {
+        $validated = $request->validate([
+            'last_price' => 'nullable|numeric|min:0',
+        ]);
+
+        // 獲取舊價格
+        $old_price = $vendor->products()->where('product_id', $productId)->first()?->pivot?->last_price;
+
+        $vendor->products()->updateExistingPivot($productId, [
+            'last_price' => $validated['last_price'] ?? null
+        ]);
+
+        // 記錄操作
+        $product = $this->inventoryService->getProduct($productId);
+        activity()
+            ->performedOn($vendor)
+            ->withProperties([
+                'old' => [
+                    'last_price' => $old_price,
+                ],
+                'attributes' => [
+                    'last_price' => $validated['last_price'] ?? null,
+                ],
+                'sub_subject' => '供貨商品',
+                'snapshot' => [
+                    'name' => "{$vendor->name}-{$product->name}",
+                    'vendor_name' => $vendor->name,
+                    'product_name' => $product->name,
+                ]
+            ])
+            ->event('updated')
+            ->log('更新供貨商品價格');
+
+        return redirect()->back()->with('success', '供貨資訊已更新');
+    }
+
+    /**
+     * 移除供貨商品 (Detach)
+     */
+    public function destroy(Vendor $vendor, $productId)
+    {
+        // 記錄操作 (需在 detach 前獲取資訊)
+        $product = $this->inventoryService->getProduct($productId);
+        $old_price = $vendor->products()->where('product_id', $productId)->first()?->pivot?->last_price;
+        
+        $vendor->products()->detach($productId);
+
+        if ($product) {
+            activity()
+                ->performedOn($vendor)
+                ->withProperties([
+                    'old' => [
+                        'product_name' => $product->name,
+                        'last_price' => $old_price,
+                    ],
+                    'sub_subject' => '供貨商品',
+                    'snapshot' => [
+                        'name' => "{$vendor->name}-{$product->name}",
+                        'vendor_name' => $vendor->name,
+                        'product_name' => $product->name,
+                    ]
+                ])
+                ->event('deleted')
+                ->log('移除供貨商品');
+        }
+
+        return redirect()->back()->with('success', '供貨商品已移除');
+    }
+}

app/Modules/Procurement/Models/PurchaseOrder.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace App\Modules\Procurement\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+
+class PurchaseOrder extends Model
+{
+    /** @use HasFactory<\Database\Factories\PurchaseOrderFactory> */
+    use HasFactory;
+    use \Spatie\Activitylog\Traits\LogsActivity;
+
+    protected $fillable = [
+        'code',
+        'vendor_id',
+        'warehouse_id',
+        'user_id',
+        'order_date',
+        'expected_delivery_date',
+        'status',
+        'total_amount',
+        'tax_amount',
+        'grand_total',
+        'remark',
+    ];
+
+    protected $casts = [
+        'order_date' => 'date',
+        'expected_delivery_date' => 'date',
+        'total_amount' => 'decimal:2',
+    ];
+
+    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    {
+        return \Spatie\Activitylog\LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $snapshot = $activity->properties['snapshot'] ?? [];
+        
+        $snapshot['po_number'] = $this->code;
+        
+        if ($this->vendor) {
+            $snapshot['vendor_name'] = $this->vendor->name;
+        }
+        // Warehouse relation removed in Strict Mode. Snapshot should be set via manual hydration if needed, 
+        // or during the procurement process where warehouse_id is known.
+
+        $activity->properties = $activity->properties->merge([
+            'snapshot' => $snapshot
+        ]);
+    }
+
+    public function vendor(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(Vendor::class);
+    }
+
+
+
+
+
+    public function items(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(PurchaseOrderItem::class);
+    }
+}

app/Modules/Procurement/Models/PurchaseOrderItem.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Modules\Procurement\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+
+class PurchaseOrderItem extends Model
+{
+    /** @use HasFactory<\Database\Factories\PurchaseOrderItemFactory> */
+    use HasFactory;
+
+    protected $fillable = [
+        'purchase_order_id',
+        'product_id',
+        'quantity',
+        'unit_price',
+        'subtotal',
+        // 驗收欄位
+        'received_quantity',
+        // 批號與效期 (驗收時填寫)
+        'batch_number',
+        'expiry_date',
+    ];
+
+    protected $casts = [
+        'quantity' => 'decimal:2',
+        'unit_price' => 'decimal:4',
+        'subtotal' => 'decimal:2',
+        'received_quantity' => 'decimal:2',
+        'expiry_date' => 'date',
+    ];
+
+    public function purchaseOrder(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(PurchaseOrder::class);
+    }
+
+
+}

app/Modules/Procurement/Models/Vendor.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Modules\Procurement\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+
+class Vendor extends Model
+{
+    /** @use HasFactory<\Database\Factories\VendorFactory> */
+    use HasFactory, LogsActivity;
+
+    protected $fillable = [
+        'code',
+        'name',
+        'short_name',
+        'tax_id',
+        'owner',
+        'contact_name',
+        'tel',
+        'phone',
+        'email',
+        'address',
+        'remark',
+    ];
+
+
+
+    public function purchaseOrders(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(PurchaseOrder::class);
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties;
+        
+        $snapshot = $properties['snapshot'] ?? [];
+        $snapshot['name'] = $this->name;
+        $properties['snapshot'] = $snapshot;
+
+        $activity->properties = $properties;
+    }
+}

app/Modules/Procurement/ProcurementServiceProvider.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Modules\Procurement;
+
+use Illuminate\Support\ServiceProvider;
+use App\Modules\Procurement\Contracts\ProcurementServiceInterface;
+use App\Modules\Procurement\Services\ProcurementService;
+
+class ProcurementServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        $this->app->bind(ProcurementServiceInterface::class, ProcurementService::class);
+    }
+
+    public function boot(): void
+    {
+        //
+    }
+}

app/Modules/Procurement/Routes/web.php

@@ -0,0 +1,38 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Modules\Procurement\Controllers\VendorController;
+use App\Modules\Procurement\Controllers\VendorProductController;
+use App\Modules\Procurement\Controllers\PurchaseOrderController;
+
+Route::middleware('auth')->group(function () {
+    // 廠商管理
+    Route::middleware('permission:vendors.view')->group(function () {
+        Route::get('/vendors', [VendorController::class, 'index'])->name('vendors.index');
+        Route::get('/vendors/{vendor}', [VendorController::class, 'show'])->name('vendors.show');
+        Route::post('/vendors', [VendorController::class, 'store'])->middleware('permission:vendors.create')->name('vendors.store');
+        Route::put('/vendors/{vendor}', [VendorController::class, 'update'])->middleware('permission:vendors.edit')->name('vendors.update');
+        Route::delete('/vendors/{vendor}', [VendorController::class, 'destroy'])->middleware('permission:vendors.delete')->name('vendors.destroy');
+
+        // 供貨商品相關路由
+        Route::post('/vendors/{vendor}/products', [VendorProductController::class, 'store'])->middleware('permission:vendors.edit')->name('vendors.products.store');
+        Route::put('/vendors/{vendor}/products/{product}', [VendorProductController::class, 'update'])->middleware('permission:vendors.edit')->name('vendors.products.update');
+        Route::delete('/vendors/{vendor}/products/{product}', [VendorProductController::class, 'destroy'])->middleware('permission:vendors.edit')->name('vendors.products.destroy');
+    });
+
+    // 採購單管理
+    Route::middleware('permission:purchase_orders.view')->group(function () {
+        Route::get('/purchase-orders', [PurchaseOrderController::class, 'index'])->name('purchase-orders.index');
+        
+        Route::middleware('permission:purchase_orders.create')->group(function () {
+            Route::get('/purchase-orders/create', [PurchaseOrderController::class, 'create'])->name('purchase-orders.create');
+            Route::post('/purchase-orders', [PurchaseOrderController::class, 'store'])->name('purchase-orders.store');
+        });
+
+        Route::get('/purchase-orders/{id}', [PurchaseOrderController::class, 'show'])->name('purchase-orders.show');
+        
+        Route::get('/purchase-orders/{id}/edit', [PurchaseOrderController::class, 'edit'])->middleware('permission:purchase_orders.edit')->name('purchase-orders.edit');
+        Route::put('/purchase-orders/{id}', [PurchaseOrderController::class, 'update'])->middleware('permission:purchase_orders.edit')->name('purchase-orders.update');
+        Route::delete('/purchase-orders/{id}', [PurchaseOrderController::class, 'destroy'])->middleware('permission:purchase_orders.delete')->name('purchase-orders.destroy');
+    });
+});

app/Modules/Procurement/Services/ProcurementService.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Modules\Procurement\Services;
+
+use App\Modules\Procurement\Contracts\ProcurementServiceInterface;
+use App\Modules\Procurement\Models\PurchaseOrder;
+use Illuminate\Support\Collection;
+
+class ProcurementService implements ProcurementServiceInterface
+{
+    public function getPurchaseOrdersByDate(string $start, string $end, array $statuses = ['received', 'completed']): Collection
+    {
+        return PurchaseOrder::with(['vendor'])
+            ->whereIn('status', $statuses)
+            ->whereBetween('created_at', [$start . ' 00:00:00', $end . ' 23:59:59'])
+            ->get();
+    }
+
+    public function getPurchaseOrdersByIds(array $ids, array $with = []): Collection
+    {
+        return PurchaseOrder::whereIn('id', $ids)->with($with)->get();
+    }
+
+    public function getDashboardStats(): array
+    {
+        return [
+            'vendorsCount' => \App\Modules\Procurement\Models\Vendor::count(),
+            'purchaseOrdersCount' => PurchaseOrder::count(),
+            'pendingOrdersCount' => PurchaseOrder::where('status', 'pending')->count(),
+        ];
+    }
+}

app/Modules/Production/Controllers/ProductionOrderController.php

@@ -0,0 +1,415 @@
+<?php
+
+namespace App\Modules\Production\Controllers;
+
+use App\Http\Controllers\Controller;
+
+use App\Modules\Production\Models\ProductionOrder;
+use App\Modules\Production\Models\ProductionOrderItem;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Core\Contracts\CoreServiceInterface;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
+use Inertia\Inertia;
+use Inertia\Response;
+
+class ProductionOrderController extends Controller
+{
+    protected $inventoryService;
+    protected $coreService;
+
+    public function __construct(InventoryServiceInterface $inventoryService, CoreServiceInterface $coreService)
+    {
+        $this->inventoryService = $inventoryService;
+        $this->coreService = $coreService;
+    }
+
+    /**
+     * 生產工單列表
+     */
+    public function index(Request $request): Response
+    {
+        // 不再使用 with()，避免跨模組 Eager Loading
+        $query = ProductionOrder::query();
+
+        // 搜尋 (此處 orWhereHas 暫時保留，因 Laravel query builder 仍可作用於資料表層級，
+        // 但實務上若模組完全隔離，應考慮搜尋引擎或 ID 預選)
+        if ($request->filled('search')) {
+            $search = $request->search;
+            $query->where(function ($q) use ($search) {
+                $q->where('code', 'like', "%{$search}%")
+                  ->orWhere('output_batch_number', 'like', "%{$search}%");
+                // 若要搜尋產品名稱，現在需先從 Inventory 查出 IDs
+                $q->where('code', 'like', "%{$search}%")
+                  ->orWhere('output_batch_number', 'like', "%{$search}%");
+                // 若要搜尋產品名稱，現在需先從 Inventory 查出 IDs
+                $productIds = $this->inventoryService->getProductsByName($search)->pluck('id');
+                $q->orWhereIn('product_id', $productIds);
+            });
+        }
+
+        // 狀態篩選
+        if ($request->filled('status') && $request->status !== 'all') {
+            $query->where('status', $request->status);
+        }
+
+        // 排除軟刪除
+        $query->orderBy($request->input('sort_field', 'created_at'), $request->input('sort_direction', 'desc'));
+
+        // 分頁
+        $perPage = $request->input('per_page', 10);
+        $productionOrders = $query->paginate($perPage)->withQueryString();
+
+        // --- 手動資料水和 (Manual Hydration) ---
+        $productIds = $productionOrders->pluck('product_id')->unique()->filter()->toArray();
+        $warehouseIds = $productionOrders->pluck('warehouse_id')->unique()->filter()->toArray();
+        $userIds = $productionOrders->pluck('user_id')->unique()->filter()->toArray();
+
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+        $warehouses = $this->inventoryService->getAllWarehouses()->whereIn('id', $warehouseIds)->keyBy('id');
+        $users = $this->coreService->getUsersByIds($userIds)->keyBy('id');
+
+        $productionOrders->getCollection()->transform(function ($order) use ($products, $warehouses, $users) {
+            $order->product = $products->get($order->product_id);
+            $order->warehouse = $warehouses->get($order->warehouse_id);
+            $order->user = $users->get($order->user_id);
+            return $order;
+        });
+
+        return Inertia::render('Production/Index', [
+            'productionOrders' => $productionOrders,
+            'filters' => $request->only(['search', 'status', 'per_page', 'sort_field', 'sort_direction']),
+        ]);
+    }
+
+    /**
+     * 新增生產單表單
+     */
+    public function create(): Response
+    {
+        return Inertia::render('Production/Create', [
+            'products' => $this->inventoryService->getAllProducts(),
+            'warehouses' => $this->inventoryService->getAllWarehouses(),
+            'units' => $this->inventoryService->getUnits(),
+        ]);
+    }
+
+    /**
+     * 儲存生產單（含自動扣料與成品入庫）
+     */
+    public function store(Request $request)
+    {
+        $status = $request->input('status', 'draft');
+
+        $baseRules = [
+            'product_id' => 'required',
+            'output_batch_number' => 'required|string|max:50',
+            'status' => 'nullable|in:draft,completed',
+        ];
+
+        $completedRules = [
+            'warehouse_id' => 'required',
+            'output_quantity' => 'required|numeric|min:0.01',
+            'production_date' => 'required|date',
+            'items' => 'required|array|min:1',
+            'items.*.inventory_id' => 'required',
+            'items.*.quantity_used' => 'required|numeric|min:0.0001',
+        ];
+
+        $rules = $status === 'completed' ? array_merge($baseRules, $completedRules) : $baseRules;
+
+        $validated = $request->validate($rules);
+
+        DB::transaction(function () use ($validated, $request, $status) {
+            // 1. 建立生產工單
+            $productionOrder = ProductionOrder::create([
+                'code' => ProductionOrder::generateCode(),
+                'product_id' => $validated['product_id'],
+                'warehouse_id' => $validated['warehouse_id'] ?? null,
+                'output_quantity' => $validated['output_quantity'] ?? 0,
+                'output_batch_number' => $validated['output_batch_number'],
+                'output_box_count' => $request->output_box_count,
+                'production_date' => $validated['production_date'] ?? now()->toDateString(),
+                'expiry_date' => $request->expiry_date,
+                'user_id' => auth()->id(),
+                'status' => $status,
+                'remark' => $request->remark,
+            ]);
+
+            activity()
+                ->performedOn($productionOrder)
+                ->causedBy(auth()->user())
+                ->log('created');
+
+            // 2. 處理明細
+            if (!empty($request->items)) {
+                foreach ($request->items as $item) {
+                    ProductionOrderItem::create([
+                        'production_order_id' => $productionOrder->id,
+                        'inventory_id' => $item['inventory_id'],
+                        'quantity_used' => $item['quantity_used'] ?? 0,
+                        'unit_id' => $item['unit_id'] ?? null,
+                    ]);
+
+                    if ($status === 'completed') {
+                        $this->inventoryService->decreaseInventoryQuantity(
+                            $item['inventory_id'], 
+                            $item['quantity_used'], 
+                            "生產單 #{$productionOrder->code} 耗料",
+                            ProductionOrder::class,
+                            $productionOrder->id
+                        );
+                    }
+                }
+            }
+
+            // 3. 成品入庫
+            if ($status === 'completed') {
+                $this->inventoryService->createInventoryRecord([
+                    'warehouse_id' => $validated['warehouse_id'],
+                    'product_id' => $validated['product_id'],
+                    'quantity' => $validated['output_quantity'],
+                    'batch_number' => $validated['output_batch_number'],
+                    'box_number' => $request->output_box_count,
+                    'arrival_date' => $validated['production_date'],
+                    'expiry_date' => $request->expiry_date,
+                    'reason' => "生產單 #{$productionOrder->code} 成品入庫",
+                    'reference_type' => ProductionOrder::class,
+                    'reference_id' => $productionOrder->id,
+                ]);
+
+                activity()
+                    ->performedOn($productionOrder)
+                    ->causedBy(auth()->user())
+                    ->log('completed');
+            }
+        });
+
+        return redirect()->route('production-orders.index')
+            ->with('success', $status === 'completed' ? '生產單已完成並入庫' : '草稿已儲存');
+    }
+
+    /**
+     * 檢視生產單詳情
+     */
+    public function show(ProductionOrder $productionOrder): Response
+    {
+        // 手動水和主表資料
+        $productionOrder->product = $this->inventoryService->getProduct($productionOrder->product_id);
+        if ($productionOrder->product) {
+            $productionOrder->product->base_unit = $this->inventoryService->getUnits()->where('id', $productionOrder->product->base_unit_id)->first();
+        }
+        $productionOrder->warehouse = $this->inventoryService->getWarehouse($productionOrder->warehouse_id);
+        $productionOrder->user = $this->coreService->getUser($productionOrder->user_id);
+
+        // 手動水和明細資料
+        $items = $productionOrder->items;
+        $inventoryIds = $items->pluck('inventory_id')->unique()->filter()->toArray();
+        $inventories = $this->inventoryService->getInventoriesByIds(
+            $inventoryIds, 
+            ['product.baseUnit', 'sourcePurchaseOrder.vendor']
+        )->keyBy('id');
+        
+        $units = $this->inventoryService->getUnits()->keyBy('id');
+
+        foreach ($items as $item) {
+            $item->inventory = $inventories->get($item->inventory_id);
+            $item->unit = $units->get($item->unit_id);
+        }
+
+        return Inertia::render('Production/Show', [
+            'productionOrder' => $productionOrder,
+        ]);
+    }
+
+    /**
+     * 取得倉庫內可用庫存
+     */
+    public function getWarehouseInventories($warehouseId)
+    {
+        $inventories = $this->inventoryService->getInventoriesByWarehouse($warehouseId);
+        
+        $data = $inventories->map(function ($inv) {
+            return [
+                'id' => $inv->id,
+                'product_id' => $inv->product_id,
+                'product_name' => $inv->product->name ?? '未知商品',
+                'product_code' => $inv->product->code ?? '',
+                'batch_number' => $inv->batch_number,
+                'box_number' => $inv->box_number,
+                'quantity' => $inv->quantity,
+                'arrival_date' => $inv->arrival_date ? $inv->arrival_date->format('Y-m-d') : null,
+                'expiry_date' => $inv->expiry_date ? $inv->expiry_date->format('Y-m-d') : null,
+                'unit_name' => $inv->product->baseUnit->name ?? '',
+                'base_unit_id' => $inv->product->base_unit_id ?? null,
+                'large_unit_id' => $inv->product->large_unit_id ?? null,
+                'conversion_rate' => $inv->product->conversion_rate ?? 1,
+            ];
+        });
+
+        return response()->json($data);
+    }
+
+    /**
+     * 編輯生產單
+     */
+    public function edit(ProductionOrder $productionOrder): Response
+    {
+        if ($productionOrder->status !== 'draft') {
+            return redirect()->route('production-orders.show', $productionOrder->id)
+                ->with('error', '只有草稿狀態的生產單可以編輯');
+        }
+
+        // 基本水和
+        $productionOrder->product = $this->inventoryService->getProduct($productionOrder->product_id);
+        $productionOrder->warehouse = $this->inventoryService->getWarehouse($productionOrder->warehouse_id);
+        
+        // 手動水和明細資料
+        $items = $productionOrder->items;
+        $inventoryIds = $items->pluck('inventory_id')->unique()->filter()->toArray();
+        $inventories = $this->inventoryService->getInventoriesByIds(
+            $inventoryIds, 
+            ['product.baseUnit']
+        )->keyBy('id');
+        
+        $units = $this->inventoryService->getUnits()->keyBy('id');
+
+        foreach ($items as $item) {
+            $item->inventory = $inventories->get($item->inventory_id);
+            $item->unit = $units->get($item->unit_id);
+        }
+
+        return Inertia::render('Production/Edit', [
+            'productionOrder' => $productionOrder,
+            'products' => $this->inventoryService->getAllProducts(),
+            'warehouses' => $this->inventoryService->getAllWarehouses(),
+            'units' => $this->inventoryService->getUnits(),
+        ]);
+    }
+
+    /**
+     * 更新生產單
+     */
+    public function update(Request $request, ProductionOrder $productionOrder)
+    {
+        if ($productionOrder->status !== 'draft') {
+             return redirect()->route('production-orders.show', $productionOrder->id)
+                ->with('error', '只有草稿可以修改');
+        }
+
+        $status = $request->input('status', 'draft');
+
+        // 基礎驗證規則
+        $baseRules = [
+            'product_id' => 'required|exists:products,id',
+            'output_batch_number' => 'required|string|max:50',
+            'status' => 'required|in:draft,completed',
+            'remark' => 'nullable|string',
+        ];
+
+        // 完工時的嚴格驗證規則
+        $completedRules = [
+            'warehouse_id' => 'required|exists:warehouses,id',
+            'output_quantity' => 'required|numeric|min:0.01',
+            'production_date' => 'required|date',
+            'expiry_date' => 'nullable|date',
+            'items' => 'required|array|min:1',
+            'items.*.inventory_id' => 'required|exists:inventories,id',
+            'items.*.quantity_used' => 'required|numeric|min:0.0001',
+        ];
+
+        // 若狀態切換為 completed，需合併驗證規則
+        $rules = $status === 'completed' ? array_merge($baseRules, $completedRules) : $baseRules;
+        
+        $validated = $request->validate($rules);
+
+        DB::transaction(function () use ($validated, $request, $status, $productionOrder) {
+            $productionOrder->update([
+                'product_id' => $validated['product_id'],
+                'warehouse_id' => $validated['warehouse_id'] ?? $productionOrder->warehouse_id,
+                'output_quantity' => $validated['output_quantity'] ?? 0,
+                'output_batch_number' => $validated['output_batch_number'],
+                'output_box_count' => $request->output_box_count,
+                'production_date' => $validated['production_date'] ?? now()->toDateString(),
+                'expiry_date' => $request->expiry_date,
+                'status' => $status,
+                'remark' => $request->remark,
+            ]);
+
+            activity()
+                ->performedOn($productionOrder)
+                ->causedBy(auth()->user())
+                ->log('updated');
+
+            // 重新建立明細
+            $productionOrder->items()->delete();
+
+            if (!empty($request->items)) {
+                foreach ($request->items as $item) {
+                    ProductionOrderItem::create([
+                        'production_order_id' => $productionOrder->id,
+                        'inventory_id' => $item['inventory_id'],
+                        'quantity_used' => $item['quantity_used'] ?? 0,
+                        'unit_id' => $item['unit_id'] ?? null,
+                    ]);
+
+                    if ($status === 'completed') {
+                        $this->inventoryService->decreaseInventoryQuantity(
+                            $item['inventory_id'], 
+                            $item['quantity_used'], 
+                            "生產單 #{$productionOrder->code} 耗料",
+                            ProductionOrder::class,
+                            $productionOrder->id
+                        );
+                    }
+                }
+            }
+
+            if ($status === 'completed') {
+                $this->inventoryService->createInventoryRecord([
+                    'warehouse_id' => $validated['warehouse_id'],
+                    'product_id' => $validated['product_id'],
+                    'quantity' => $validated['output_quantity'],
+                    'batch_number' => $validated['output_batch_number'],
+                    'box_number' => $request->output_box_count,
+                    'arrival_date' => $validated['production_date'],
+                    'expiry_date' => $request->expiry_date,
+                    'reason' => "生產單 #{$productionOrder->code} 成品入庫",
+                    'reference_type' => ProductionOrder::class,
+                    'reference_id' => $productionOrder->id,
+                ]);
+
+                activity()
+                    ->performedOn($productionOrder)
+                    ->causedBy(auth()->user())
+                    ->log('completed');
+            }
+        });
+
+        return redirect()->route('production-orders.index')
+            ->with('success', '生產單已更新');
+    }
+
+    /**
+     * 刪除生產單
+     */
+    public function destroy(ProductionOrder $productionOrder)
+    {
+        if ($productionOrder->status === 'completed') {
+            return redirect()->back()->with('error', '已完工的生產單無法刪除');
+        }
+
+        DB::transaction(function () use ($productionOrder) {
+            // 紀錄刪除動作 (需在刪除前或使用軟刪除)
+            activity()
+                ->performedOn($productionOrder)
+                ->causedBy(auth()->user())
+                ->log('deleted');
+
+            $productionOrder->items()->delete();
+            $productionOrder->delete();
+        });
+
+        return redirect()->route('production-orders.index')->with('success', '生產單已刪除');
+    }
+}

app/Modules/Production/Controllers/RecipeController.php

@@ -0,0 +1,191 @@
+<?php
+
+namespace App\Modules\Production\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Production\Models\Recipe;
+use App\Modules\Production\Models\RecipeItem;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
+use Inertia\Inertia;
+use Inertia\Response;
+
+class RecipeController extends Controller
+{
+    protected $inventoryService;
+
+    public function __construct(InventoryServiceInterface $inventoryService)
+    {
+        $this->inventoryService = $inventoryService;
+    }
+
+    /**
+     * 配方列表
+     */
+    public function index(Request $request): Response
+    {
+        $query = Recipe::query();
+
+        if ($request->filled('search')) {
+            $search = $request->search;
+            $query->where(function ($q) use ($search) {
+                $q->where('code', 'like', "%{$search}%")
+                  ->orWhere('name', 'like', "%{$search}%");
+                
+                $productIds = $this->inventoryService->getProductsByName($search)->pluck('id');
+                $q->orWhereIn('product_id', $productIds);
+            });
+        }
+
+        $query->orderBy($request->input('sort_field', 'created_at'), $request->input('sort_direction', 'desc'));
+
+        $recipes = $query->paginate($request->input('per_page', 10))->withQueryString();
+
+        // Manual Hydration
+        $productIds = $recipes->pluck('product_id')->unique()->filter()->toArray();
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+
+        $recipes->getCollection()->transform(function ($recipe) use ($products) {
+            $recipe->product = $products->get($recipe->product_id);
+            return $recipe;
+        });
+
+        return Inertia::render('Production/Recipe/Index', [
+            'recipes' => $recipes,
+            'filters' => $request->only(['search', 'per_page', 'sort_field', 'sort_direction']),
+        ]);
+    }
+
+    /**
+     * 新增配方表單
+     */
+    public function create(): Response
+    {
+        return Inertia::render('Production/Recipe/Create', [
+            'products' => $this->inventoryService->getAllProducts(),
+            'units' => $this->inventoryService->getUnits(),
+        ]);
+    }
+
+    /**
+     * 儲存配方
+     */
+    public function store(Request $request)
+    {
+        $validated = $request->validate([
+            'product_id' => 'required|exists:products,id',
+            'code' => 'required|string|max:50|unique:recipes,code',
+            'name' => 'required|string|max:255',
+            'description' => 'nullable|string',
+            'yield_quantity' => 'required|numeric|min:0.01',
+            'items' => 'required|array|min:1',
+            'items.*.product_id' => 'required|exists:products,id',
+            'items.*.quantity' => 'required|numeric|min:0.0001',
+            'items.*.unit_id' => 'nullable|exists:units,id',
+            'items.*.remark' => 'nullable|string',
+        ]);
+
+        DB::transaction(function () use ($validated) {
+            $recipe = Recipe::create([
+                'product_id' => $validated['product_id'],
+                'code' => $validated['code'],
+                'name' => $validated['name'],
+                'description' => $validated['description'],
+                'yield_quantity' => $validated['yield_quantity'],
+                'is_active' => true,
+            ]);
+
+            foreach ($validated['items'] as $item) {
+                RecipeItem::create([
+                    'recipe_id' => $recipe->id,
+                    'product_id' => $item['product_id'],
+                    'quantity' => $item['quantity'],
+                    'unit_id' => $item['unit_id'],
+                    'remark' => $item['remark'],
+                ]);
+            }
+        });
+
+        return redirect()->route('recipes.index')->with('success', '配方已建立');
+    }
+
+    /**
+     * 編輯配方表單
+     */
+    public function edit(Recipe $recipe): Response
+    {
+        // Hydrate Product
+        $recipe->product = $this->inventoryService->getProduct($recipe->product_id);
+        
+        // Load items with details
+        $items = $recipe->items;
+        $productIds = $items->pluck('product_id')->unique()->toArray();
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('id');
+        $units = $this->inventoryService->getUnits()->keyBy('id');
+
+        foreach ($items as $item) {
+            $item->product = $products->get($item->product_id);
+            $item->unit = $units->get($item->unit_id);
+        }
+
+        return Inertia::render('Production/Recipe/Edit', [
+            'recipe' => $recipe,
+            'products' => $this->inventoryService->getAllProducts(),
+            'units' => $this->inventoryService->getUnits(),
+        ]);
+    }
+
+    /**
+     * 更新配方
+     */
+    public function update(Request $request, Recipe $recipe)
+    {
+        $validated = $request->validate([
+            'product_id' => 'required|exists:products,id',
+            'code' => 'required|string|max:50|unique:recipes,code,' . $recipe->id,
+            'name' => 'required|string|max:255',
+            'description' => 'nullable|string',
+            'yield_quantity' => 'required|numeric|min:0.01',
+            'items' => 'required|array|min:1',
+            'items.*.product_id' => 'required|exists:products,id',
+            'items.*.quantity' => 'required|numeric|min:0.0001',
+            'items.*.unit_id' => 'nullable|exists:units,id',
+            'items.*.remark' => 'nullable|string',
+        ]);
+
+        DB::transaction(function () use ($validated, $recipe) {
+            $recipe->update([
+                'product_id' => $validated['product_id'],
+                'code' => $validated['code'],
+                'name' => $validated['name'],
+                'description' => $validated['description'],
+                'yield_quantity' => $validated['yield_quantity'],
+            ]);
+
+            // Sync items (Delete all and recreate)
+            $recipe->items()->delete();
+
+            foreach ($validated['items'] as $item) {
+                RecipeItem::create([
+                    'recipe_id' => $recipe->id,
+                    'product_id' => $item['product_id'],
+                    'quantity' => $item['quantity'],
+                    'unit_id' => $item['unit_id'],
+                    'remark' => $item['remark'],
+                ]);
+            }
+        });
+
+        return redirect()->route('recipes.index')->with('success', '配方已更新');
+    }
+
+    /**
+     * 刪除配方
+     */
+    public function destroy(Recipe $recipe)
+    {
+        $recipe->delete();
+        return redirect()->back()->with('success', '配方已刪除');
+    }
+}

app/Modules/Production/Models/ProductionOrder.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace App\Modules\Production\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class ProductionOrder extends Model
+{
+    use HasFactory, LogsActivity;
+
+    protected $fillable = [
+        'code',
+        'product_id',
+        'warehouse_id',
+        'output_quantity',
+        'output_batch_number',
+        'output_box_count',
+        'production_date',
+        'expiry_date',
+        'user_id',
+        'status',
+        'remark',
+    ];
+
+    protected $casts = [
+        'production_date' => 'date',
+        'expiry_date' => 'date',
+        'output_quantity' => 'decimal:2',
+    ];
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logOnly([
+                'code',
+                'status',
+                'output_quantity',
+                'output_batch_number',
+                'production_date',
+                'remark'
+            ])
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs()
+            ->setDescriptionForEvent(fn(string $eventName) => "生產工單已{$this->getEventDescription($eventName)}");
+    }
+
+    protected function getEventDescription($eventName): string
+    {
+        return match ($eventName) {
+            'created' => '建立',
+            'updated' => '更新',
+            'deleted' => '刪除',
+            default => $eventName,
+        };
+    }
+
+    public static function generateCode()
+    {
+        $prefix = 'PO' . now()->format('Ymd');
+        $lastOrder = self::where('code', 'like', $prefix . '%')->latest()->first();
+        if ($lastOrder) {
+            $lastSequence = intval(substr($lastOrder->code, -3));
+            $sequence = str_pad($lastSequence + 1, 3, '0', STR_PAD_LEFT);
+        } else {
+            $sequence = '001';
+        }
+        return $prefix . $sequence;
+    }
+
+    public function items(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(ProductionOrderItem::class);
+    }
+}

app/Modules/Production/Models/ProductionOrderItem.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Modules\Production\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+
+class ProductionOrderItem extends Model
+{
+    /** @use HasFactory<\Database\Factories\ProductionOrderItemFactory> */
+    use HasFactory;
+
+    protected $fillable = [
+        'production_order_id',
+        'inventory_id',
+        'quantity_used',
+        'unit_id',
+    ];
+
+    protected $casts = [
+        'quantity_used' => 'decimal:4',
+    ];
+
+    public function productionOrder(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(ProductionOrder::class);
+    }
+}

app/Modules/Production/Models/Recipe.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Modules\Production\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+
+class Recipe extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $fillable = [
+        'product_id',
+        'code',
+        'name',
+        'description',
+        'yield_quantity',
+        'is_active',
+    ];
+
+    protected $casts = [
+        'yield_quantity' => 'decimal:2',
+        'is_active' => 'boolean',
+    ];
+
+
+
+    public function items()
+    {
+        return $this->hasMany(RecipeItem::class);
+    }
+}

app/Modules/Production/Models/RecipeItem.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Modules\Production\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+
+class RecipeItem extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'recipe_id',
+        'product_id',
+        'quantity',
+        'unit_id',
+        'remark',
+    ];
+
+    protected $casts = [
+        'quantity' => 'decimal:4',
+    ];
+
+    public function recipe()
+    {
+        return $this->belongsTo(Recipe::class);
+    }
+
+
+}

app/Modules/Production/Routes/web.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Modules\Production\Controllers\ProductionOrderController;
+use App\Modules\Production\Controllers\RecipeController;
+
+Route::middleware('auth')->group(function () {
+    // 配方管理
+    Route::resource('recipes', RecipeController::class);
+
+    // 生產管理
+    Route::middleware('permission:production_orders.view')->group(function () {
+        Route::get('/production-orders', [ProductionOrderController::class, 'index'])->name('production-orders.index');
+        
+        Route::middleware('permission:production_orders.create')->group(function () {
+            Route::get('/production-orders/create', [ProductionOrderController::class, 'create'])->name('production-orders.create');
+            Route::post('/production-orders', [ProductionOrderController::class, 'store'])->name('production-orders.store');
+        });
+        
+        Route::get('/production-orders/{productionOrder}', [ProductionOrderController::class, 'show'])->name('production-orders.show');
+        
+        Route::middleware('permission:production_orders.edit')->group(function () {
+            Route::get('/production-orders/{productionOrder}/edit', [ProductionOrderController::class, 'edit'])->name('production-orders.edit');
+            Route::put('/production-orders/{productionOrder}', [ProductionOrderController::class, 'update'])->name('production-orders.update');
+        });
+    });
+
+    // 生產管理 API
+    Route::get('/api/production/warehouses/{warehouse}/inventories', [ProductionOrderController::class, 'getWarehouseInventories'])
+        ->middleware('permission:production_orders.create')
+        ->name('api.production.warehouses.inventories');
+});

app/Modules/Shared/Contracts/ServiceInterface.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Modules\Shared\Contracts;
+
+/**
+ * Base Service Interface
+ * 所有模組的 Service 都應繼承此介面 (若有通用方法)
+ */
+interface ServiceInterface
+{
+    // Future common methods
+}

app/Modules/Shared/SharedServiceProvider.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Modules\Shared;
+
+use Illuminate\Support\ServiceProvider;
+
+class SharedServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        // Register shared services or repositories here
+    }
+
+    public function boot(): void
+    {
+        //
+    }
+}

app/Providers/ModuleServiceProvider.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace App\Providers;
+
+use Illuminate\Support\Facades\File;
+use Illuminate\Support\Facades\Route;
+use Illuminate\Support\ServiceProvider;
+
+class ModuleServiceProvider extends ServiceProvider
+{
+    /**
+     * Register services.
+     */
+    public function register(): void
+    {
+        //
+    }
+
+    /**
+     * Bootstrap services.
+     */
+    public function boot(): void
+    {
+        $modulesPath = app_path('Modules');
+
+        if (File::exists($modulesPath)) {
+            $modules = File::directories($modulesPath);
+
+            foreach ($modules as $module) {
+                // $moduleName = basename($module);
+                // Load Routes
+                $routesPath = $module . '/Routes/web.php';
+                if (File::exists($routesPath)) {
+                    Route::middleware('web')
+                        ->group($routesPath);
+                }
+
+                // Load Service Provider
+                $moduleName = basename($module);
+                $providerClass = "App\\Modules\\{$moduleName}\\{$moduleName}ServiceProvider";
+                
+                if (class_exists($providerClass)) {
+                    $this->app->register($providerClass);
+                }
+            }
+        }
+    }
+}

bootstrap/providers.php

@@ -3,4 +3,5 @@
 return [
     App\Providers\AppServiceProvider::class,
     App\Providers\TenancyServiceProvider::class,
+    App\Providers\ModuleServiceProvider::class,
 ];

composer.json

@@ -13,7 +13,9 @@
         "inertiajs/inertia-laravel": "^2.0",
         "laravel/framework": "^12.0",
         "laravel/tinker": "^2.10.1",
+        "spatie/laravel-activitylog": "^4.10",
         "spatie/laravel-permission": "^6.24",
+        "stancl/jobpipeline": "^1.8",
         "stancl/tenancy": "^3.9",
         "tightenco/ziggy": "^2.6"
     },
@@ -29,6 +31,7 @@
     "autoload": {
         "psr-4": {
             "App\\": "app/",
+            "App\\Modules\\": "app/Modules/",
             "Database\\Factories\\": "database/factories/",
             "Database\\Seeders\\": "database/seeders/"
         }
@@ -90,4 +93,4 @@
     },
     "minimum-stability": "stable",
     "prefer-stable": true
-}
+}

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "931b01f076d9ee28568cd36f178a0c04",
+    "content-hash": "46092572c41c587bf3e7fc53465e5b56",
     "packages": [
         {
             "name": "brick/math",
@@ -3413,6 +3413,158 @@
             },
             "time": "2025-12-14T04:43:48+00:00"
         },
+        {
+            "name": "spatie/laravel-activitylog",
+            "version": "4.10.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/laravel-activitylog.git",
+                "reference": "bb879775d487438ed9a99e64f09086b608990c10"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/laravel-activitylog/zipball/bb879775d487438ed9a99e64f09086b608990c10",
+                "reference": "bb879775d487438ed9a99e64f09086b608990c10",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/config": "^8.0 || ^9.0 || ^10.0 || ^11.0 || ^12.0",
+                "illuminate/database": "^8.69 || ^9.27 || ^10.0 || ^11.0 || ^12.0",
+                "illuminate/support": "^8.0 || ^9.0 || ^10.0 || ^11.0 || ^12.0",
+                "php": "^8.1",
+                "spatie/laravel-package-tools": "^1.6.3"
+            },
+            "require-dev": {
+                "ext-json": "*",
+                "orchestra/testbench": "^6.23 || ^7.0 || ^8.0 || ^9.0 || ^10.0",
+                "pestphp/pest": "^1.20 || ^2.0 || ^3.0"
+            },
+            "type": "library",
+            "extra": {
+                "laravel": {
+                    "providers": [
+                        "Spatie\\Activitylog\\ActivitylogServiceProvider"
+                    ]
+                }
+            },
+            "autoload": {
+                "files": [
+                    "src/helpers.php"
+                ],
+                "psr-4": {
+                    "Spatie\\Activitylog\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian De Deyne",
+                    "email": "sebastian@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Tom Witkowski",
+                    "email": "dev.gummibeer@gmail.com",
+                    "homepage": "https://gummibeer.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A very simple activity logger to monitor the users of your website or application",
+            "homepage": "https://github.com/spatie/activitylog",
+            "keywords": [
+                "activity",
+                "laravel",
+                "log",
+                "spatie",
+                "user"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/laravel-activitylog/issues",
+                "source": "https://github.com/spatie/laravel-activitylog/tree/4.10.2"
+            },
+            "funding": [
+                {
+                    "url": "https://spatie.be/open-source/support-us",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-06-15T06:59:49+00:00"
+        },
+        {
+            "name": "spatie/laravel-package-tools",
+            "version": "1.92.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/laravel-package-tools.git",
+                "reference": "f09a799850b1ed765103a4f0b4355006360c49a5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/laravel-package-tools/zipball/f09a799850b1ed765103a4f0b4355006360c49a5",
+                "reference": "f09a799850b1ed765103a4f0b4355006360c49a5",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/contracts": "^9.28|^10.0|^11.0|^12.0",
+                "php": "^8.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.5",
+                "orchestra/testbench": "^7.7|^8.0|^9.0|^10.0",
+                "pestphp/pest": "^1.23|^2.1|^3.1",
+                "phpunit/php-code-coverage": "^9.0|^10.0|^11.0",
+                "phpunit/phpunit": "^9.5.24|^10.5|^11.5",
+                "spatie/pest-plugin-test-time": "^1.1|^2.2"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Spatie\\LaravelPackageTools\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Tools for creating Laravel packages",
+            "homepage": "https://github.com/spatie/laravel-package-tools",
+            "keywords": [
+                "laravel-package-tools",
+                "spatie"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/laravel-package-tools/issues",
+                "source": "https://github.com/spatie/laravel-package-tools/tree/1.92.7"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-07-17T15:46:43+00:00"
+        },
         {
             "name": "spatie/laravel-permission",
             "version": "6.24.0",

config/activitylog.php

@@ -0,0 +1,52 @@
+<?php
+
+return [
+
+    /*
+     * If set to false, no activities will be saved to the database.
+     */
+    'enabled' => env('ACTIVITY_LOGGER_ENABLED', true),
+
+    /*
+     * When the clean-command is executed, all recording activities older than
+     * the number of days specified here will be deleted.
+     */
+    'delete_records_older_than_days' => 365,
+
+    /*
+     * If no log name is passed to the activity() helper
+     * we use this default log name.
+     */
+    'default_log_name' => 'default',
+
+    /*
+     * You can specify an auth driver here that gets user models.
+     * If this is null we'll use the current Laravel auth driver.
+     */
+    'default_auth_driver' => null,
+
+    /*
+     * If set to true, the subject returns soft deleted models.
+     */
+    'subject_returns_soft_deleted_models' => false,
+
+    /*
+     * This model will be used to log activity.
+     * It should implement the Spatie\Activitylog\Contracts\Activity interface
+     * and extend Illuminate\Database\Eloquent\Model.
+     */
+    'activity_model' => \Spatie\Activitylog\Models\Activity::class,
+
+    /*
+     * This is the name of the table that will be created by the migration and
+     * used by the Activity model shipped with this package.
+     */
+    'table_name' => env('ACTIVITY_LOGGER_TABLE_NAME', 'activity_log'),
+
+    /*
+     * This is the database connection that will be used by the migration and
+     * the Activity model shipped with this package. In case it's not set
+     * Laravel's database.default will be used instead.
+     */
+    'database_connection' => env('ACTIVITY_LOGGER_DB_CONNECTION'),
+];

config/auth.php

@@ -62,7 +62,7 @@ return [
     'providers' => [
         'users' => [
             'driver' => 'eloquent',
-            'model' => env('AUTH_MODEL', App\Models\User::class),
+            'model' => env('AUTH_MODEL', App\Modules\Core\Models\User::class),
         ],
 
         // 'users' => [

config/permission.php

@@ -24,7 +24,7 @@ return [
          * `Spatie\Permission\Contracts\Role` contract.
          */
 
-        'role' => Spatie\Permission\Models\Role::class,
+        'role' => App\Modules\Core\Models\Role::class,
 
     ],
 

config/tenancy.php

@@ -3,7 +3,7 @@
 declare(strict_types=1);
 
 use Stancl\Tenancy\Database\Models\Domain;
-use App\Models\Tenant;
+use App\Modules\Core\Models\Tenant;
 
 return [
     'tenant_model' => Tenant::class,

database/factories/ProductFactory.php

@@ -2,11 +2,11 @@
 
 namespace Database\Factories;
 
-use App\Models\Category;
+use App\Modules\Inventory\Models\Category;
 use Illuminate\Database\Eloquent\Factories\Factory;
 
 /**
- * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\Product>
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Modules\Inventory\Models\Product>
  */
 class ProductFactory extends Factory
 {

database/factories/UserFactory.php

@@ -7,10 +7,17 @@ use Illuminate\Support\Facades\Hash;
 use Illuminate\Support\Str;
 
 /**
- * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\User>
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Modules\Core\Models\User>
  */
 class UserFactory extends Factory
 {
+    /**
+     * The name of the factory's corresponding model.
+     *
+     * @var string
+     */
+    protected $model = \App\Modules\Core\Models\User::class;
+
     /**
      * The current password being used by the factory.
      */
@@ -25,6 +32,7 @@ class UserFactory extends Factory
     {
         return [
             'name' => fake()->name(),
+            'username' => fake()->unique()->userName(),
             'email' => fake()->unique()->safeEmail(),
             'email_verified_at' => now(),
             'password' => static::$password ??= Hash::make('password'),

database/migrations/tenant/2026_01_16_152857_create_activity_log_table.php

@@ -0,0 +1,27 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateActivityLogTable extends Migration
+{
+    public function up()
+    {
+        Schema::connection(config('activitylog.database_connection'))->create(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->bigIncrements('id');
+            $table->string('log_name')->nullable();
+            $table->text('description');
+            $table->nullableMorphs('subject', 'subject');
+            $table->nullableMorphs('causer', 'causer');
+            $table->json('properties')->nullable();
+            $table->timestamps();
+            $table->index('log_name');
+        });
+    }
+
+    public function down()
+    {
+        Schema::connection(config('activitylog.database_connection'))->dropIfExists(config('activitylog.table_name'));
+    }
+}

database/migrations/tenant/2026_01_16_152858_add_event_column_to_activity_log_table.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddEventColumnToActivityLogTable extends Migration
+{
+    public function up()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->string('event')->nullable()->after('subject_type');
+        });
+    }
+
+    public function down()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->dropColumn('event');
+        });
+    }
+}

database/migrations/tenant/2026_01_16_152859_add_batch_uuid_column_to_activity_log_table.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddBatchUuidColumnToActivityLogTable extends Migration
+{
+    public function up()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->uuid('batch_uuid')->nullable()->after('properties');
+        });
+    }
+
+    public function down()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->dropColumn('batch_uuid');
+        });
+    }
+}

database/migrations/tenant/2026_01_20_085700_add_performance_indexes_to_activity_log.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            // 單欄索引：事件類型（高頻過濾條件）
+            $table->index('event', 'idx_event');
+            
+            // 單欄索引：批次 UUID（未來批次操作查詢）
+            $table->index('batch_uuid', 'idx_batch_uuid');
+            
+            // 複合索引 1：時間 + 事件類型（最常見的組合查詢）
+            $table->index(['created_at', 'event'], 'idx_created_event');
+            
+            // 複合索引 2：主體類型 + 主體 ID + 時間（查詢特定資源的操作歷史）
+            $table->index(['subject_type', 'subject_id', 'created_at'], 'idx_subject_created');
+            
+            // 複合索引 3：操作者 + 時間（查詢特定使用者的操作紀錄）
+            $table->index(['causer_id', 'created_at'], 'idx_causer_created');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->dropIndex('idx_event');
+            $table->dropIndex('idx_batch_uuid');
+            $table->dropIndex('idx_created_event');
+            $table->dropIndex('idx_subject_created');
+            $table->dropIndex('idx_causer_created');
+        });
+    }
+};

database/migrations/tenant/2026_01_20_093627_create_utility_fees_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('utility_fees', function (Blueprint $table) {
+            $table->id();
+            $table->date('transaction_date')->comment('費用日期');
+            $table->string('category')->comment('費用類別 (例如：電費、水費、瓦斯費)');
+            $table->decimal('amount', 12, 2)->comment('金額');
+            $table->string('invoice_number', 20)->nullable()->comment('發票號碼');
+            $table->text('description')->nullable()->comment('說明/備註');
+            $table->timestamps();
+
+            // 常用查詢索引
+            $table->index(['transaction_date', 'category']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('utility_fees');
+    }
+};

database/migrations/tenant/2026_01_21_163715_add_batch_columns_to_inventories_table.php

@@ -0,0 +1,90 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * 
+     * 新增批號追溯相關欄位至 inventories 資料表。
+     * 批號格式：{商品代號}-{來源國家}-{入庫日期}-{批次流水號}
+     * 完整格式（含箱號）：{商品代號}-{來源國家}-{入庫日期}-{批次流水號}-{箱號}
+     */
+    public function up(): void
+    {
+        // Step 1: 新增批號相關欄位
+        Schema::table('inventories', function (Blueprint $table) {
+            // 批號組成：{商品代號}-{來源國家}-{入庫日期}-{批次流水號}
+            $table->string('batch_number', 50)->nullable()->after('location')
+                ->comment('批號 (格式: AB-VN-20260119-01)');
+            $table->string('box_number', 10)->nullable()->after('batch_number')
+                ->comment('箱號 (如: 01, 02)');
+            
+            // 批號解析欄位（方便查詢與排序）
+            $table->string('origin_country', 10)->nullable()->after('box_number')
+                ->comment('來源國家代碼 (如: VN, TW)');
+            $table->date('arrival_date')->nullable()->after('origin_country')
+                ->comment('入庫日期');
+            $table->date('expiry_date')->nullable()->after('arrival_date')
+                ->comment('效期');
+            
+            // 來源追溯
+            $table->foreignId('source_purchase_order_id')->nullable()->after('expiry_date')
+                ->constrained('purchase_orders')->nullOnDelete()
+                ->comment('來源採購單');
+            
+            // 品質狀態
+            $table->enum('quality_status', ['normal', 'frozen', 'rejected'])
+                ->default('normal')->after('source_purchase_order_id')
+                ->comment('品質狀態：正常/凍結/退貨');
+            $table->text('quality_remark')->nullable()->after('quality_status')
+                ->comment('品質異常備註');
+        });
+
+        // Step 2: 為現有資料設定預設批號 (LEGACY-{id})
+        DB::statement("UPDATE inventories SET batch_number = CONCAT('LEGACY-', id) WHERE batch_number IS NULL");
+
+        // Step 3: 將 batch_number 改為必填
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->string('batch_number', 50)->nullable(false)->change();
+        });
+
+        // Step 4: 新增批號相關索引 (不刪除舊索引，因為有外鍵依賴)
+        // 舊的 warehouse_product_unique 保留，新增更精確的批號索引
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->index(['warehouse_id', 'product_id', 'batch_number'], 'inventories_batch_lookup');
+            $table->index(['arrival_date'], 'inventories_arrival_date');
+            $table->index(['quality_status'], 'inventories_quality_status');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventories', function (Blueprint $table) {
+            // 移除索引
+            $table->dropIndex('inventories_batch_lookup');
+            $table->dropIndex('inventories_arrival_date');
+            $table->dropIndex('inventories_quality_status');
+
+            // 移除新增欄位
+            $table->dropForeign(['source_purchase_order_id']);
+            $table->dropColumn([
+                'batch_number',
+                'box_number',
+                'origin_country',
+                'arrival_date',
+                'expiry_date',
+                'source_purchase_order_id',
+                'quality_status',
+                'quality_remark',
+            ]);
+        });
+    }
+};