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

@@ -101,8 +101,8 @@ public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, st
 protected function getSubjectMap()
 {
     return [
-        'App\Models\Product' => '商品',
-        'App\Models\UtilityFee' => '公共事業費', // ✅ 新增映射
+        'App\Modules\Inventory\Models\Product' => '商品',
+        'App\Modules\Finance\Models\UtilityFee' => '公共事業費', // ✅ 新增映射
     ];
 }
 ```

.gitea/workflows/deploy.yaml

@@ -147,6 +147,10 @@ jobs:
           key: ${{ secrets.PROD_SSH_KEY }}
           script: |
             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"

.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

@@ -11,24 +11,86 @@ 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
 
-## 📂 系統選單結構 (Sidebar)
+## 📂 系統功能詳細說明
 
-以下為 ERP 系統之側邊導覽結構及其對應之權限：
+### 🌳 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
+```
 
-- 🏠 **儀表板** (`/`)
-- 📦 **商品與庫存管理**
-  - 📄 **商品資料管理** (`/products`) - `products.view`
-  - 🏢 **倉庫管理** (`/warehouses`) - `warehouses.view`
-- 🚚 **廠商管理**
-  - 👥 **廠商資料管理** (`/vendors`) - `vendors.view`
-- 🛒 **採購管理**
-  - 📝 **採購單管理** (`/purchase-orders`) - `purchase_orders.view`
-- 💰 **財務管理**
-  - 🧾 **公共事業費** (`/utility-fees`) - `utility_fees.view`
-- ⚙️ **系統管理**
-  - 👤 **使用者管理** (`/admin/users`) - `users.view`
-  - 🛡️ **角色與權限** (`/admin/roles`) - `roles.view`
-  - 📜 **操作紀錄** (`/admin/activity-logs`) - `system.view_logs`
+---
+
+#### 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
 

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/AccountingReportController.php

@@ -1,150 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use App\Models\PurchaseOrder;
-use App\Models\UtilityFee;
-use Illuminate\Http\Request;
-use Inertia\Inertia;
-use Illuminate\Support\Carbon;
-use Illuminate\Pagination\LengthAwarePaginator;
-
-class AccountingReportController extends Controller
-{
-    public function index(Request $request)
-    {
-        $dateStart = $request->input('date_start', Carbon::now()->toDateString());
-        $dateEnd = $request->input('date_end', Carbon::now()->toDateString());
-
-        // 1. Get Purchase Orders (Completed or Received that are ready for accounting)
-        $purchaseOrders = PurchaseOrder::with(['vendor'])
-            ->whereIn('status', ['received', 'completed'])
-            ->whereBetween('created_at', [$dateStart . ' 00:00:00', $dateEnd . ' 23:59:59'])
-            ->get()
-            ->map(function ($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' => $po->grand_total,
-                ];
-            });
-
-        // 2. Get Utility Fees
-        $utilityFees = UtilityFee::whereBetween('transaction_date', [$dateStart, $dateEnd])
-            ->get()
-            ->map(function ($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' => $fee->amount,
-                ];
-            });
-
-        // Combine and Sort
-        $allRecords = $purchaseOrders->concat($utilityFees)
-            ->sortByDesc('date')
-            ->values();
-
-        // 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()]
-        );
-
-        $summary = [
-            'total_amount' => $allRecords->sum('amount'),
-            'purchase_total' => $purchaseOrders->sum('amount'),
-            'utility_total' => $utilityFees->sum('amount'),
-            'record_count' => $allRecords->count(),
-        ];
-
-        return Inertia::render('Accounting/Report', [
-            'records' => $paginatedRecords,
-            'summary' => $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());
-
-        $purchaseOrders = PurchaseOrder::with(['vendor'])
-            ->whereIn('status', ['received', 'completed'])
-            ->whereBetween('created_at', [$dateStart . ' 00:00:00', $dateEnd . ' 23:59:59'])
-            ->get();
-
-        $utilityFees = UtilityFee::whereBetween('transaction_date', [$dateStart, $dateEnd])->get();
-
-        $allRecords = collect();
-
-        foreach ($purchaseOrders as $po) {
-            $allRecords->push([
-                $po->created_at->toDateString(),
-                '採購單',
-                '進貨支出',
-                $po->vendor->name ?? '',
-                $po->code,
-                $po->invoice_number,
-                $po->grand_total,
-            ]);
-        }
-
-        foreach ($utilityFees as $fee) {
-            $allRecords->push([
-                $fee->transaction_date,
-                '公共事業費',
-                $fee->category,
-                $fee->description,
-                '-',
-                $fee->invoice_number,
-                $fee->amount,
-            ]);
-        }
-
-        $allRecords = $allRecords->sortByDesc(0);
-
-        $filename = "accounting_report_{$dateStart}_{$dateEnd}.csv";
-        $headers = [
-            'Content-Type' => 'text/csv; charset=UTF-8',
-            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
-        ];
-
-        $callback = function () use ($allRecords) {
-            $file = fopen('php://output', 'w');
-            // BOM for Excel compatibility with UTF-8
-            fprintf($file, chr(0xEF).chr(0xBB).chr(0xBF));
-            
-            fputcsv($file, ['日期', '來源', '類別', '項目', '參考單號', '發票號碼', '金額']);
-
-            foreach ($allRecords as $row) {
-                fputcsv($file, $row);
-            }
-            fclose($file);
-        };
-
-        return response()->stream($callback, 200, $headers);
-    }
-}

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

@@ -1,330 +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
-                // 取得或初始化庫存紀錄
-                $inventory = $warehouse->inventories()->firstOrNew(
-                    ['product_id' => $item['productId']],
-                    ['quantity' => 0, 'safety_stock' => null]
-                );
-
-                $currentQty = $inventory->quantity;
-                $newQty = $currentQty + $item['quantity'];
-
-                // 更新庫存並儲存 (新紀錄: Created, 舊紀錄: Updated)
-                $inventory->quantity = $newQty;
-                $inventory->save();
-
-                // 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/UtilityFeeController.php

@@ -1,176 +0,0 @@
-<?php
-
-namespace App\Http\Controllers;
-
-use App\Models\UtilityFee;
-use Illuminate\Http\Request;
-use Inertia\Inertia;
-
-class UtilityFeeController extends Controller
-{
-    public function index(Request $request)
-    {
-        $query = UtilityFee::query();
-
-        // Search
-        if ($request->has('search')) {
-            $search = $request->input('search');
-            $query->where(function($q) use ($search) {
-                $q->where('category', 'like', "%{$search}%")
-                  ->orWhere('invoice_number', 'like', "%{$search}%")
-                  ->orWhere('description', 'like', "%{$search}%");
-            });
-        }
-
-        // Filtering
-        if ($request->filled('category') && $request->input('category') !== 'all') {
-            $query->where('category', $request->input('category'));
-        }
-
-        if ($request->filled('date_start')) {
-            $query->where('transaction_date', '>=', $request->input('date_start'));
-        }
-
-        if ($request->filled('date_end')) {
-            $query->where('transaction_date', '<=', $request->input('date_end'));
-        }
-
-        // Sorting
-        $sortField = $request->input('sort_field');
-        $sortDirection = $request->input('sort_direction');
-
-        if ($sortField && $sortDirection) {
-            $query->orderBy($sortField, $sortDirection);
-        } else {
-             $query->orderBy('created_at', 'desc');
-        }
-
-        $fees = $query->paginate($request->input('per_page', 10))->withQueryString();
-
-        $availableCategories = UtilityFee::distinct()->pluck('category');
-
-        return Inertia::render('UtilityFee/Index', [
-            'fees' => $fees,
-            'availableCategories' => $availableCategories,
-            'filters' => $request->only(['search', 'category', 'date_start', 'date_end', 'sort_field', 'sort_direction', 'per_page']),
-        ]);
-    }
-
-    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);
-
-        // Log activity
-        activity()
-            ->performedOn($fee)
-            ->causedBy(auth()->user())
-            ->event('created')
-            ->withProperties([
-                'attributes' => $fee->getAttributes(),
-                'snapshot' => [
-                    'category' => $fee->category,
-                    'amount' => $fee->amount,
-                    'transaction_date' => $fee->transaction_date->format('Y-m-d'),
-                ]
-            ])
-            ->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',
-        ]);
-
-        // Capture old attributes before update
-        $oldAttributes = $utility_fee->getAttributes();
-
-        $utility_fee->update($validated);
-
-        // Capture new attributes
-        $newAttributes = $utility_fee->getAttributes();
-
-        // Manual logOnlyDirty: Filter attributes to only include changes
-        $changedAttributes = [];
-        $changedOldAttributes = [];
-
-        foreach ($newAttributes as $key => $value) {
-            // Skip timestamps if they are the only change (optional, but good practice)
-            if (in_array($key, ['updated_at'])) continue;
-
-            $oldValue = $oldAttributes[$key] ?? null;
-            
-            // Simple comparison (casting to string to handle date objects vs strings if necessary, 
-            // but Eloquent attributes are usually consistent if casted. 
-            // Using loose comparison != handles most cases correctly)
-            if ($value != $oldValue) {
-                $changedAttributes[$key] = $value;
-                $changedOldAttributes[$key] = $oldValue;
-            }
-        }
-
-        // Only log if there are changes (excluding just updated_at)
-        if (empty($changedAttributes)) {
-            return redirect()->back();
-        }
-
-        // Log activity with before/after comparison
-        activity()
-            ->performedOn($utility_fee)
-            ->causedBy(auth()->user())
-            ->event('updated')
-            ->withProperties([
-                'attributes' => $changedAttributes,
-                'old' => $changedOldAttributes,
-                'snapshot' => [
-                    'category' => $utility_fee->category,
-                    'amount' => $utility_fee->amount,
-                    'transaction_date' => $utility_fee->transaction_date->format('Y-m-d'),
-                ]
-            ])
-            ->log('updated');
-
-        return redirect()->back();
-    }
-
-    public function destroy(UtilityFee $utility_fee)
-    {
-        // Capture data snapshot before deletion
-        $snapshot = [
-            'category' => $utility_fee->category,
-            'amount' => $utility_fee->amount,
-            'transaction_date' => $utility_fee->transaction_date->format('Y-m-d'),
-            'invoice_number' => $utility_fee->invoice_number,
-            'description' => $utility_fee->description,
-        ];
-
-        // Log activity before deletion
-        activity()
-            ->performedOn($utility_fee)
-            ->causedBy(auth()->user())
-            ->event('deleted')
-            ->withProperties([
-                'attributes' => $utility_fee->getAttributes(),
-                'snapshot' => $snapshot
-            ])
-            ->log('deleted');
-
-        $utility_fee->delete();
-        
-        return redirect()->back();
-    }
-}

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/Models/PurchaseOrder.php

@@ -1,166 +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;
-use Spatie\Activitylog\Traits\LogsActivity;
-use Spatie\Activitylog\LogOptions;
-
-class PurchaseOrder extends Model
-{
-    use HasFactory, LogsActivity;
-
-    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:Y-m-d',
-        'invoice_date' => 'date:Y-m-d',
-        'total_amount' => 'decimal:2',
-        'tax_amount' => 'decimal:2',
-        'grand_total' => 'decimal:2',
-        'invoice_amount' => 'decimal:2',
-    ];
-
-    protected $appends = [
-        'poNumber',
-        'supplierId',
-        'supplierName',
-        'expectedDate',
-        'totalAmount',
-        'taxAmount', // Add this
-        'grandTotal', // Add this
-        '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 $this->attributes['expected_delivery_date'] ?? null;
-    }
-
-    public function getTotalAmountAttribute(): float
-    {
-        return (float) ($this->attributes['total_amount'] ?? 0);
-    }
-
-    public function getTaxAmountAttribute(): float
-    {
-        return (float) ($this->attributes['tax_amount'] ?? 0);
-    }
-
-    public function getGrandTotalAttribute(): float
-    {
-        return (float) ($this->attributes['grand_total'] ?? 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
-    {
-        return $this->attributes['invoice_date'] ?? null;
-    }
-
-    public function getInvoiceAmountAttribute(): ?float
-    {
-        return isset($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);
-    }
-
-    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'] ?? [];
-
-        // Snapshot key names
-        $snapshot['po_number'] = $this->code;
-        $snapshot['vendor_name'] = $this->vendor ? $this->vendor->name : null;
-        $snapshot['warehouse_name'] = $this->warehouse ? $this->warehouse->name : null;
-        $snapshot['user_name'] = $this->user ? $this->user->name : null;
-
-        $properties['attributes'] = $attributes;
-        $properties['snapshot'] = $snapshot;
-        $activity->properties = $properties;
-    }
-}

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/UtilityFee.php

@@ -1,24 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Model;
-
-class UtilityFee extends Model
-{
-    use HasFactory;
-
-    protected $fillable = [
-        'transaction_date',
-        'category',
-        'amount',
-        'invoice_number',
-        'description',
-    ];
-
-    protected $casts = [
-        'transaction_date' => 'date:Y-m-d',
-        'amount' => 'decimal:2',
-    ];
-}

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

@@ -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 Inertia\Inertia;
 use Spatie\Activitylog\Models\Activity;
@@ -12,16 +13,16 @@ class ActivityLogController extends Controller
     private function getSubjectMap()
     {
         return [
-            'App\Models\User' => '使用者',
-            'App\Models\Role' => '角色',
-            'App\Models\Product' => '商品',
-            'App\Models\Vendor' => '廠商',
-            'App\Models\Category' => '商品分類',
-            'App\Models\Unit' => '單位',
-            'App\Models\PurchaseOrder' => '採購單',
-            'App\Models\Warehouse' => '倉庫',
-            'App\Models\Inventory' => '庫存',
-            'App\Models\UtilityFee' => '公共事業費',
+            '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',
         ];
     }
 
@@ -95,13 +96,13 @@ class ActivityLogController extends Controller
                 ];
             });
 
-        // Prepare subject types for frontend filter
+        // 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();
 
-        // Get users for causer filter
-        $users = \App\Models\User::select('id', 'name')->orderBy('name')->get()
+        // 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];
             });

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;
@@ -12,7 +13,7 @@ use Illuminate\Validation\Rule;
 class RoleController extends Controller
 {
     /**
-     * Display a listing of the resource.
+     * 顯示資源列表。
      */
     public function index(Request $request)
     {
@@ -22,7 +23,7 @@ class RoleController extends Controller
         $query = Role::withCount('users', 'permissions')
             ->with('users:id,name,username');
 
-        // Handle sorting
+        // 處理排序
         if (in_array($sortBy, ['users_count', 'permissions_count', 'created_at', 'id'])) {
            $query->orderBy($sortBy, $sortOrder);
         } else {
@@ -38,7 +39,7 @@ class RoleController extends Controller
     }
 
     /**
-     * Show the form for creating a new resource.
+     * 顯示建立新資源的表單。
      */
     public function create()
     {
@@ -50,7 +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)
     {
@@ -74,7 +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)
     {
@@ -96,7 +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)
     {
@@ -126,7 +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)
     {

app/Modules/Core/Controllers/UserController.php

@@ -1,9 +1,10 @@
 <?php
 
-namespace App\Http\Controllers\Admin;
+namespace App\Modules\Core\Controllers;
 
 use App\Http\Controllers\Controller;
-use App\Models\User;
+
+use App\Modules\Core\Models\User;
 use Illuminate\Http\Request;
 use Spatie\Permission\Models\Role;
 use Inertia\Inertia;
@@ -13,7 +14,7 @@ use Illuminate\Support\Facades\Hash;
 class UserController extends Controller
 {
     /**
-     * Display a listing of the resource.
+     * 顯示資源列表。
      */
     public function index(Request $request)
     {
@@ -25,7 +26,7 @@ class UserController extends Controller
 
         $query = User::with(['roles:id,name,display_name']);
 
-        // Handle Search
+        // 處理搜尋
         if ($search) {
             $query->where(function ($q) use ($search) {
                 $q->where('name', 'like', "%{$search}%")
@@ -34,14 +35,14 @@ class UserController extends Controller
             });
         }
 
-        // Handle Role Filter
+        // 處理角色篩選
         if ($roleId && $roleId !== 'all') {
             $query->whereHas('roles', function ($q) use ($roleId) {
                 $q->where('id', $roleId);
             });
         }
 
-         // Handle sorting
+         // 處理排序
         if (in_array($sortBy, ['name', 'created_at'])) {
            $query->orderBy($sortBy, $sortOrder);
         } else {
@@ -59,7 +60,7 @@ class UserController extends Controller
     }
 
     /**
-     * Show the form for creating a new resource.
+     * 顯示建立新資源的表單。
      */
     public function create()
     {
@@ -71,7 +72,7 @@ class UserController 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 $request)
     {
@@ -97,7 +98,7 @@ class UserController extends Controller
         if (!empty($validated['roles'])) {
             $user->syncRoles($validated['roles']);
 
-            // Update the 'created' log to include 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')
@@ -117,7 +118,7 @@ class UserController 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)
     {
@@ -132,7 +133,7 @@ class UserController 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)
     {
@@ -149,7 +150,7 @@ class UserController extends Controller
             'password.confirmed' => '密碼確認不符',
         ]);
 
-        // 1. Prepare data and detect changes
+        // 1. 準備資料並偵測變更
         $userData = [
             'name' => $validated['name'],
             'email' => $validated['email'],
@@ -162,7 +163,7 @@ class UserController extends Controller
 
         $user->fill($userData);
 
-        // Capture dirty attributes for manual logging
+        // 捕捉變更屬性以進行手動記錄
         $dirty = $user->getDirty();
         $oldAttributes = [];
         $newAttributes = [];
@@ -172,10 +173,10 @@ class UserController extends Controller
             $newAttributes[$key] = $value;
         }
 
-        // Save without triggering events (prevents duplicate log)
+        // 儲存但不觸發事件（防止重複記錄）
         $user->saveQuietly();
 
-        // 2. Handle Roles
+        // 2. 處理角色
         $roleChanges = null;
         if (isset($validated['roles'])) {
             $oldRoles = $user->roles()->pluck('display_name')->join(', ');
@@ -190,7 +191,7 @@ class UserController extends Controller
             }
         }
 
-        // 3. Manually Log activity (Single Consolidated Log)
+        // 3. 手動記錄活動（單一整合記錄）
         if (!empty($newAttributes) || $roleChanges) {
             $properties = [
                 'attributes' => $newAttributes,
@@ -208,7 +209,7 @@ class UserController extends Controller
                 ->event('updated')
                 ->withProperties($properties)
                 ->tap(function (\Spatie\Activitylog\Contracts\Activity $activity) use ($user) {
-                    // Manually add snapshot since we aren't using the model's LogOptions due to saveQuietly
+                    // 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,
@@ -223,7 +224,7 @@ class UserController extends Controller
     }
 
     /**
-     * Remove the specified resource from storage.
+     * 從儲存體中移除指定資源。
      */
     public function destroy(string $id)
     {

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

@@ -1,6 +1,6 @@
 <?php
 
-namespace App\Models;
+namespace App\Modules\Core\Models;
 
 use Spatie\Permission\Models\Role as SpatieRole;
 use Spatie\Activitylog\Traits\LogsActivity;

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

@@ -1,6 +1,6 @@
 <?php
 
-namespace App\Models;
+namespace App\Modules\Core\Models;
 
 // use Illuminate\Contracts\Auth\MustVerifyEmail;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
@@ -16,10 +16,20 @@ class User extends Authenticatable
     use HasFactory, Notifiable, HasRoles, LogsActivity;
 
     /**
-     * The attributes that are mass assignable.
+     * 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',
@@ -28,7 +38,7 @@ class User extends Authenticatable
     ];
 
     /**
-     * The attributes that should be hidden for serialization.
+     * 序列化時應隱藏的屬性。
      *
      * @var list<string>
      */
@@ -38,7 +48,7 @@ class User extends Authenticatable
     ];
 
     /**
-     * Get the attributes that should be cast.
+     * 取得應進行轉換的屬性。
      *
      * @return array<string, string>
      */

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,
                 ]
             );
 
@@ -59,12 +67,15 @@ class TransferOrderController extends Controller
             
             // 設定活動紀錄原因
             $sourceInventory->activityLogReason = "撥補出庫 至 {$targetWarehouse->name}";
-            $sourceInventory->update(['quantity' => $newSourceQty]);
+            $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']})" : ""),
@@ -78,12 +89,19 @@ class TransferOrderController extends Controller
 
             // 設定活動紀錄原因
             $targetInventory->activityLogReason = "撥補入庫 來自 {$sourceWarehouse->name}";
-            $targetInventory->update(['quantity' => $newTargetQty]);
+            // 確保目標庫存也有成本 (如果是繼承來的)
+            if ($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']})" : ""),
@@ -108,11 +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

@@ -1,37 +1,27 @@
 <?php
 
-namespace App\Models;
+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',
-        'is_active',
-    ];
+    protected $fillable = ['name', 'description'];
 
-    protected $casts = [
-        'is_active' => 'boolean',
-    ];
-
-    /**
-     * Get the products for the category.
-     */
     public function products(): HasMany
     {
         return $this->hasMany(Product::class);
     }
 
-    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    public function getActivitylogOptions(): LogOptions
     {
-        return \Spatie\Activitylog\LogOptions::defaults()
+        return LogOptions::defaults()
             ->logAll()
             ->logOnlyDirty()
             ->dontSubmitEmptyLogs();

app/Modules/Inventory/Models/Inventory.php

@@ -1,27 +1,46 @@
 <?php
 
-namespace App\Models;
+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',
-        'safety_stock',
         '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',
     ];
 
     /**
-     * Transient property to store the reason for the activity log (e.g., "Replenishment #123").
-     * This is not stored in the database column but used for logging context.
+     * 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;
@@ -40,12 +59,12 @@ class Inventory extends Model
         $attributes = $properties['attributes'] ?? [];
         $snapshot = $properties['snapshot'] ?? [];
 
-        // Always snapshot names for context, even if IDs didn't change
-        // $this refers to the Inventory model instance
+        // 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);
 
-        // Capture the reason if set
+        // 如果已設定原因，則進行捕捉
         if ($this->activityLogReason) {
             $attributes['_reason'] = $this->activityLogReason;
         }
@@ -89,4 +108,31 @@ class Inventory extends Model
             $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

@@ -1,6 +1,6 @@
 <?php
 
-namespace App\Models;
+namespace App\Modules\Inventory\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -10,6 +10,7 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
 use Spatie\Activitylog\Traits\LogsActivity;
 use Spatie\Activitylog\LogOptions;
 
+
 class Product extends Model
 {
     use HasFactory, LogsActivity, SoftDeletes;
@@ -31,7 +32,7 @@ class Product extends Model
     ];
 
     /**
-     * Get the category that owns the product.
+     * 取得該商品所屬的分類。
      */
     public function category(): BelongsTo
     {
@@ -53,10 +54,7 @@ class Product extends Model
         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
     {
@@ -82,13 +80,13 @@ class Product extends Model
         $attributes = $properties['attributes'] ?? [];
         $snapshot = $properties['snapshot'] ?? [];
         
-        // Handle Category Name 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;
         }
         
-        // Handle Unit Name Snapshots
+        // 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])) {
@@ -98,7 +96,7 @@ class Product extends Model
             }
         }
         
-        // Always snapshot self name for context (so logs always show "Cola")
+        // 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;

app/Modules/Inventory/Models/Unit.php

@@ -1,24 +1,32 @@
 <?php
 
-namespace App\Models;
+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<\Database\Factories\UnitFactory> */
     use HasFactory, LogsActivity;
 
-    protected $fillable = [
-        'name',
-        'code',
-    ];
+    protected $fillable = ['name', 'abbreviation'];
 
-    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    public function productsAsBase(): HasMany
     {
-        return \Spatie\Activitylog\LogOptions::defaults()
+        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();

app/Modules/Inventory/Models/Warehouse.php

@@ -1,10 +1,11 @@
 <?php
 
-namespace App\Models;
+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> */
@@ -14,8 +15,17 @@ class Warehouse extends Model
     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
@@ -42,10 +52,7 @@ class Warehouse extends Model
         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
     {

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

@@ -1,21 +1,35 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Procurement\Controllers;
 
-use App\Models\PurchaseOrder;
-use App\Models\Vendor;
-use App\Models\Warehouse;
+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)
     {
-        $query = PurchaseOrder::with(['vendor', 'warehouse', 'user']);
+        // 1. 從關聯中移除 'warehouse' 與 'user'
+        $query = PurchaseOrder::with(['vendor']);
 
-        // Search
+        // 搜尋
         if ($request->search) {
             $query->where(function($q) use ($request) {
                 $q->where('code', 'like', "%{$request->search}%")
@@ -25,7 +39,7 @@ class PurchaseOrderController extends Controller
             });
         }
 
-        // Filters
+        // 篩選
         if ($request->status && $request->status !== 'all') {
             $query->where('status', $request->status);
         }
@@ -34,7 +48,7 @@ class PurchaseOrderController extends Controller
             $query->where('warehouse_id', $request->warehouse_id);
         }
 
-        // Date Range
+        // 日期範圍
         if ($request->date_start) {
             $query->whereDate('created_at', '>=', $request->date_start);
         }
@@ -43,7 +57,7 @@ class PurchaseOrderController extends Controller
             $query->whereDate('created_at', '<=', $request->date_end);
         }
 
-        // Sorting
+        // 排序
         $sortField = $request->sort_field ?? 'id';
         $sortDirection = $request->sort_direction ?? 'desc';
         $allowedSortFields = ['id', 'code', 'status', 'total_amount', 'created_at', 'expected_delivery_date'];
@@ -55,36 +69,90 @@ class PurchaseOrderController extends Controller
         $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' => Warehouse::all(['id', 'name']),
+            'warehouses' => $warehouses->map(fn($w)=>(object)['id'=>$w->id, 'name'=>$w->name]), 
         ]);
     }
 
     public function create()
     {
-        $vendors = Vendor::with(['products.baseUnit', 'products.largeUnit', 'products.purchaseUnit'])->get()->map(function ($vendor) {
+        // 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' => $vendor->products->map(function ($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),
-                    ];
-                })
+                'commonProducts' => $commonProducts
             ];
         });
 
-        $warehouses = Warehouse::all()->map(function ($w) {
+        $warehouses = $this->inventoryService->getAllWarehouses()->map(function ($w) {
             return [
                 'id' => (string) $w->id,
                 'name' => $w->name,
@@ -102,6 +170,7 @@ class PurchaseOrderController extends Controller
         $validated = $request->validate([
             'vendor_id' => 'required|exists:vendors,id',
             'warehouse_id' => 'required|exists:warehouses,id',
+            'order_date' => 'required|date', // 新增驗證
             'expected_delivery_date' => 'nullable|date',
             'remark' => 'nullable|string',
             'invoice_number' => ['nullable', 'string', 'max:11', 'regex:/^[A-Z]{2}-\d{8}$/'],
@@ -139,22 +208,14 @@ class PurchaseOrderController extends Controller
                 $totalAmount += $item['subtotal'];
             }
 
-            // Tax calculation
+            // 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) {
-                $user = \App\Models\User::first();
-                if (!$user) {
-                    $user = \App\Models\User::create([
-                        'name' => '系統管理員',
-                        'email' => 'admin@example.com',
-                        'password' => bcrypt('password'),
-                    ]);
-                }
-                $userId = $user->id;
+                $user = $this->coreService->ensureSystemUserExists();                $userId = $user->id;
             }
 
             $order = PurchaseOrder::create([
@@ -163,6 +224,7 @@ class PurchaseOrderController extends Controller
                 '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,
@@ -198,120 +260,150 @@ class PurchaseOrderController extends Controller
 
     public function show($id)
     {
-        $order = PurchaseOrder::with(['vendor', 'warehouse', 'user', 'items.product.baseUnit', 'items.product.largeUnit'])->findOrFail($id);
+        $order = PurchaseOrder::with(['vendor', 'items'])->findOrFail($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);
+        // 手動注入
+        $order->setRelation('warehouse', $this->inventoryService->getWarehouse($order->warehouse_id));
+        $order->setRelation('user', $this->coreService->getUser($order->user_id));
 
-                // 設定當前選中的單位 ID (from saved item)
-                $item->unitId = $item->unit_id; 
+        $productIds = $order->items->pluck('product_id')->unique()->toArray();
+        $products = $this->inventoryService->getProductsByIds($productIds)->keyBy('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;
+        $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' => $order
+            'order' => $formattedOrder
         ]);
     }
 
     public function edit($id)
     {
-        $order = PurchaseOrder::with(['items.product'])->findOrFail($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();
 
-        $vendors = Vendor::with(['products.baseUnit', 'products.largeUnit', 'products.purchaseUnit'])->get()->map(function ($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),
-                    ];
-                })
+                'commonProducts' => $commonProducts
             ];
         });
 
-        $warehouses = Warehouse::all()->map(function ($w) {
+        // 3. 獲取倉庫
+        $warehouses = $this->inventoryService->getAllWarehouses()->map(function ($w) {
             return [
                 'id' => (string) $w->id,
                 'name' => $w->name,
             ];
         });
 
-        // Transform items for frontend form
-        // Transform items for frontend form
+        // 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;
-        $order->items->transform(function ($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;
+        $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' => $order,
+            'order' => $formattedOrder,
             'suppliers' => $vendors,
             'warehouses' => $warehouses,
         ]);
@@ -324,6 +416,7 @@ class PurchaseOrderController extends Controller
         $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',
@@ -335,7 +428,7 @@ class PurchaseOrderController extends Controller
             'items.*.quantity' => 'required|numeric|min:0.01',
             'items.*.subtotal' => 'required|numeric|min:0', // 總金額
             'items.*.unitId' => 'nullable|exists:units,id',
-            // Allow both tax_amount and taxAmount for compatibility
+            // 允許 tax_amount 和 taxAmount 以保持相容性
             'tax_amount' => 'nullable|numeric|min:0', 
             'taxAmount' => 'nullable|numeric|min:0',
         ]);
@@ -348,15 +441,16 @@ class PurchaseOrderController extends Controller
                 $totalAmount += $item['subtotal'];
             }
 
-            // Tax calculation (handle both keys)
+            // 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. Fill attributes but don't save yet to capture changes
+            // 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,
@@ -368,7 +462,7 @@ class PurchaseOrderController extends Controller
                 'invoice_amount' => $validated['invoice_amount'] ?? null,
             ]);
 
-            // Capture attribute changes for manual logging
+            // 捕捉變更屬性以進行手動記錄
             $dirty = $order->getDirty();
             $oldAttributes = [];
             $newAttributes = [];
@@ -378,10 +472,10 @@ class PurchaseOrderController extends Controller
                 $newAttributes[$key] = $value;
             }
 
-            // Save without triggering events (prevents duplicate log)
+            // 儲存但不觸發事件（防止重複記錄）
             $order->saveQuietly();
 
-            // 2. Capture old items with product names for diffing
+            // 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,
@@ -394,7 +488,7 @@ class PurchaseOrderController extends Controller
                 ];
             })->keyBy('product_id');
 
-            // Sync items (Original logic)
+            // 同步項目（原始邏輯）
             $order->items()->delete();
             
             $newItemsData = [];
@@ -412,14 +506,14 @@ class PurchaseOrderController extends Controller
                 $newItemsData[] = $newItem;
             }
 
-            // 3. Calculate Item Diffs
+            // 3. 計算項目差異
             $itemDiffs = [
                 'added' => [],
                 'removed' => [],
                 'updated' => [],
             ];
 
-            // Re-fetch new items to ensure we have fresh relations
+            // 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,
@@ -431,20 +525,20 @@ class PurchaseOrderController extends Controller
                 ];
             })->keyBy('product_id');
 
-            // Find removed
+            // 找出已移除的項目
             foreach ($oldItems as $productId => $oldItem) {
                 if (!$newItemsFormatted->has($productId)) {
                     $itemDiffs['removed'][] = $oldItem;
                 }
             }
 
-            // Find added and updated
+            // 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];
-                    // Compare fields
+                    // 比對欄位
                     if (
                         $oldItem['quantity'] != $newItem['quantity'] || 
                         $oldItem['unit_id'] != $newItem['unit_id'] ||
@@ -467,8 +561,8 @@ class PurchaseOrderController extends Controller
                 }
             }
 
-            // 4. Manually Log activity (Single Consolidated Log)
-            // Log if there are attribute changes OR item changes
+            // 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)
@@ -503,19 +597,24 @@ class PurchaseOrderController extends Controller
         try {
             DB::beginTransaction();
             
-            $order = PurchaseOrder::with(['items.product', 'items.unit'])->findOrFail($id);
+            $order = PurchaseOrder::with(['items'])->findOrFail($id);
             
-            // Capture items for logging
-            $items = $order->items->map(function ($item) {
+            // 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' => $item->product_name,
+                    'product_name' => $product?->name ?? 'Unknown',
                     'quantity' => floatval($item->quantity),
-                    'unit_name' => $item->unit_name,
+                    'unit_name' => 'N/A', 
                     'subtotal' => floatval($item->subtotal),
                 ];
             })->toArray();
 
-            // Manually log the deletion with items
+            // 手動記錄包含項目的刪除操作
             activity()
                 ->performedOn($order)
                 ->causedBy(auth()->user())
@@ -536,10 +635,10 @@ class PurchaseOrderController extends Controller
                 ])
                 ->log('deleted');
 
-            // Disable automatic logging for this operation
+            // 對此操作停用自動記錄
             $order->disableLogging();
             
-            // Delete associated items first
+            // 先刪除關聯項目
             $order->items()->delete();
             $order->delete();
             

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

@@ -1,13 +1,19 @@
 <?php
 
-namespace App\Http\Controllers;
+namespace App\Modules\Procurement\Controllers;
 
-use App\Models\Vendor;
+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)
      */
@@ -28,7 +34,7 @@ class VendorProductController extends Controller
         ]);
 
         // 記錄操作
-        $product = \App\Models\Product::find($validated['product_id']);
+        $product = $this->inventoryService->getProduct($validated['product_id']);
         activity()
             ->performedOn($vendor)
             ->withProperties([
@@ -66,7 +72,7 @@ class VendorProductController extends Controller
         ]);
 
         // 記錄操作
-        $product = \App\Models\Product::find($productId);
+        $product = $this->inventoryService->getProduct($productId);
         activity()
             ->performedOn($vendor)
             ->withProperties([
@@ -95,7 +101,7 @@ class VendorProductController extends Controller
     public function destroy(Vendor $vendor, $productId)
     {
         // 記錄操作 (需在 detach 前獲取資訊)
-        $product = \App\Models\Product::find($productId);
+        $product = $this->inventoryService->getProduct($productId);
         $old_price = $vendor->products()->where('product_id', $productId)->first()?->pivot?->last_price;
         
         $vendor->products()->detach($productId);

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

@@ -1,16 +1,17 @@
 <?php
 
-namespace App\Models;
+namespace App\Modules\Procurement\Models;
 
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\BelongsToMany;
-use Illuminate\Database\Eloquent\Relations\HasMany;
 use Spatie\Activitylog\Traits\LogsActivity;
 use Spatie\Activitylog\LogOptions;
 
+
 class Vendor extends Model
 {
-    use LogsActivity;
+    /** @use HasFactory<\Database\Factories\VendorFactory> */
+    use HasFactory, LogsActivity;
 
     protected $fillable = [
         'code',
@@ -23,16 +24,12 @@ class Vendor extends Model
         'phone',
         'email',
         'address',
-        'remark'
+        'remark',
     ];
-    public function products(): BelongsToMany
-    {
-        return $this->belongsToMany(Product::class, 'product_vendor')
-                    ->withPivot('last_price')
-                    ->withTimestamps();
-    }
 
-    public function purchaseOrders(): HasMany
+
+
+    public function purchaseOrders(): \Illuminate\Database\Eloquent\Relations\HasMany
     {
         return $this->hasMany(PurchaseOrder::class);
     }
@@ -49,12 +46,8 @@ class Vendor extends Model
     {
         $properties = $activity->properties;
         
-        // Store name in 'snapshot' for context, keeping 'attributes' clean
         $snapshot = $properties['snapshot'] ?? [];
-        // Only set name if it's not already set (e.g. by controller for specific context like supply product)
-        if (!isset($snapshot['name'])) {
-            $snapshot['name'] = $this->name;
-        }
+        $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

@@ -31,6 +31,7 @@
     "autoload": {
         "psr-4": {
             "App\\": "app/",
+            "App\\Modules\\": "app/Modules/",
             "Database\\Factories\\": "database/factories/",
             "Database\\Seeders\\": "database/seeders/"
         }
@@ -92,4 +93,4 @@
     },
     "minimum-stability": "stable",
     "prefer-stable": true
-}
+}

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' => App\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_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',
+            ]);
+        });
+    }
+};

database/migrations/tenant/2026_01_21_164523_create_production_orders_table.php

@@ -0,0 +1,58 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * 
+     * 生產工單主表，記錄每次生產的成品資訊。
+     */
+    public function up(): void
+    {
+        Schema::create('production_orders', function (Blueprint $table) {
+            $table->id();
+            $table->string('code', 50)->unique()->comment('生產單號 (如: PRO-20260121-001)');
+            
+            // 成品資訊
+            $table->foreignId('product_id')->constrained()->onDelete('restrict')
+                ->comment('成品商品');
+            $table->string('output_batch_number', 50)->comment('成品批號');
+            $table->string('output_box_count', 10)->nullable()->comment('成品箱數');
+            $table->decimal('output_quantity', 10, 2)->comment('生產數量');
+            
+            // 入庫倉庫
+            $table->foreignId('warehouse_id')->constrained()->onDelete('restrict')
+                ->comment('入庫倉庫');
+            
+            // 生產資訊
+            $table->date('production_date')->comment('生產日期');
+            $table->date('expiry_date')->nullable()->comment('成品效期');
+            
+            // 操作人員
+            $table->foreignId('user_id')->nullable()->constrained()->nullOnDelete()
+                ->comment('操作人員');
+            
+            // 狀態與備註
+            $table->enum('status', ['draft', 'completed', 'cancelled'])
+                ->default('completed')->comment('狀態：草稿/完成/取消');
+            $table->text('remark')->nullable()->comment('備註');
+            
+            $table->timestamps();
+            
+            // 索引
+            $table->index(['production_date', 'product_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('production_orders');
+    }
+};

database/migrations/tenant/2026_01_21_164530_create_production_order_items_table.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * 
+     * 生產工單明細表 (BOM)，記錄使用的原物料。
+     */
+    public function up(): void
+    {
+        Schema::create('production_order_items', function (Blueprint $table) {
+            $table->id();
+            
+            // 所屬生產工單
+            $table->foreignId('production_order_id')->constrained()->onDelete('cascade')
+                ->comment('所屬生產工單');
+            
+            // 使用的庫存（含商品與批號）
+            $table->foreignId('inventory_id')->constrained()->onDelete('restrict')
+                ->comment('使用的庫存紀錄 (含 product, batch)');
+            
+            // 使用量
+            $table->decimal('quantity_used', 10, 4)->comment('使用量');
+            $table->foreignId('unit_id')->nullable()->constrained('units')->nullOnDelete()
+                ->comment('單位');
+            
+            $table->timestamps();
+            
+            // 索引
+            $table->index(['production_order_id', 'inventory_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('production_order_items');
+    }
+};

database/migrations/tenant/2026_01_21_165250_add_production_order_permissions.php

@@ -0,0 +1,57 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+use Spatie\Permission\Models\Permission;
+use Spatie\Permission\Models\Role;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * 
+     * 新增生產管理權限
+     */
+    public function up(): void
+    {
+        $guard = 'web';
+        
+        // 建立生產管理權限
+        $permissions = [
+            'production_orders.view' => '檢視生產工單',
+            'production_orders.create' => '建立生產工單',
+            'production_orders.edit' => '編輯生產工單',
+            'production_orders.delete' => '刪除生產工單',
+        ];
+
+        foreach ($permissions as $name => $description) {
+            Permission::firstOrCreate(
+                ['name' => $name, 'guard_name' => $guard],
+                ['name' => $name, 'guard_name' => $guard]
+            );
+        }
+
+        // 授予 super-admin 所有新權限
+        $superAdmin = Role::where('name', 'super-admin')->first();
+        if ($superAdmin) {
+            $superAdmin->givePermissionTo(array_keys($permissions));
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        $permissions = [
+            'production_orders.view',
+            'production_orders.create',
+            'production_orders.edit',
+            'production_orders.delete',
+        ];
+
+        foreach ($permissions as $name) {
+            Permission::where('name', $name)->delete();
+        }
+    }
+};

database/migrations/tenant/2026_01_22_083603_remove_warehouse_product_unique_from_inventories.php

@@ -0,0 +1,36 @@
+<?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::table('inventories', function (Blueprint $table) {
+            // 先新增新的唯一約束 (倉庫 + 商品 + 批號)
+            // 這樣可以確保 warehouse_id 始終有索引可用，避免外鍵約束錯誤
+            $table->unique(['warehouse_id', 'product_id', 'batch_number'], 'warehouse_product_batch_unique');
+            
+            // 然後移除舊的唯一約束 (倉庫 + 商品)
+            $table->dropUnique('warehouse_product_unique');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventories', function (Blueprint $table) {
+            // 恢復時也要注意順序，先加回舊的（如果資料允許），再刪除新的
+            // 但如果資料已經有多批號，加回舊的會失敗。這裡只盡力而為。
+            $table->unique(['warehouse_id', 'product_id'], 'warehouse_product_unique');
+            $table->dropUnique('warehouse_product_batch_unique');
+        });
+    }
+};

database/migrations/tenant/2026_01_22_094700_increase_inventory_transactions_type_length.php

@@ -0,0 +1,28 @@
+<?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::table('inventory_transactions', function (Blueprint $table) {
+            $table->string('type', 50)->comment('異動類型: 採購進貨, 銷售出庫, 盤點調整, 撥補入庫, 撥補出庫, 手動入庫, 手動調整庫存')->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventory_transactions', function (Blueprint $table) {
+            $table->string('type', 20)->comment('異動類型: 採購進貨, 銷售出庫, 盤點調整, 撥補入庫, 撥補出庫, 手動入庫')->change();
+        });
+    }
+};

database/migrations/tenant/2026_01_22_095600_add_deleted_at_to_inventories_table.php

@@ -0,0 +1,28 @@
+<?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::table('inventories', function (Blueprint $table) {
+            $table->softDeletes();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->dropSoftDeletes();
+        });
+    }
+};

database/migrations/tenant/2026_01_22_103032_create_warehouse_product_safety_stocks_table.php

@@ -0,0 +1,32 @@
+<?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('warehouse_product_safety_stocks', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('warehouse_id')->constrained()->cascadeOnDelete();
+            $table->foreignId('product_id')->constrained()->cascadeOnDelete();
+            $table->decimal('safety_stock', 10, 2)->default(0);
+            $table->timestamps();
+
+            $table->unique(['warehouse_id', 'product_id'], 'wh_product_safety_stock_unique');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('warehouse_product_safety_stocks');
+    }
+};

database/migrations/tenant/2026_01_22_103054_migrate_safety_stock_data_to_new_table.php

@@ -0,0 +1,55 @@
+<?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.
+     * 將 inventories.safety_stock 資料遷移至 warehouse_product_safety_stocks 表格
+     */
+    public function up(): void
+    {
+        // 1. 遷移現有資料：從 inventories 提取唯一的 warehouse_id + product_id 組合及其 safety_stock
+        DB::statement("
+            INSERT INTO warehouse_product_safety_stocks (warehouse_id, product_id, safety_stock, created_at, updated_at)
+            SELECT 
+                warehouse_id, 
+                product_id, 
+                MAX(safety_stock) as safety_stock,
+                NOW(),
+                NOW()
+            FROM inventories
+            WHERE safety_stock IS NOT NULL AND safety_stock > 0
+            GROUP BY warehouse_id, product_id
+            ON DUPLICATE KEY UPDATE safety_stock = VALUES(safety_stock), updated_at = NOW()
+        ");
+
+        // 2. 移除 inventories 表的 safety_stock 欄位
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->dropColumn('safety_stock');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // 1. 在 inventories 表重新加入 safety_stock 欄位
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->decimal('safety_stock', 10, 2)->nullable()->after('quantity');
+        });
+
+        // 2. 將資料還原回 inventories (更新同商品所有批號)
+        DB::statement("
+            UPDATE inventories i
+            INNER JOIN warehouse_product_safety_stocks ss 
+                ON i.warehouse_id = ss.warehouse_id AND i.product_id = ss.product_id
+            SET i.safety_stock = ss.safety_stock
+        ");
+    }
+};

database/migrations/tenant/2026_01_22_141800_make_warehouse_id_nullable_in_production_orders.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * 
+     * 將 warehouse_id 改為 nullable，支援草稿模式。
+     */
+    public function up(): void
+    {
+        Schema::table('production_orders', function (Blueprint $table) {
+            $table->foreignId('warehouse_id')->nullable()->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('production_orders', function (Blueprint $table) {
+            $table->foreignId('warehouse_id')->nullable(false)->change();
+        });
+    }
+};

database/migrations/tenant/2026_01_26_000001_create_recipes_tables.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::create('recipes', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('product_id')->constrained('products')->onDelete('cascade')->comment('連結的成品商品 ID');
+            $table->string('code')->unique()->comment('配方代號');
+            $table->string('name')->comment('配方名稱');
+            $table->text('description')->nullable()->comment('配方描述');
+            $table->decimal('yield_quantity', 10, 2)->default(1.00)->comment('標準產出數量');
+            $table->boolean('is_active')->default(true)->comment('是否啟用');
+            $table->timestamps();
+            $table->softDeletes();
+        });
+
+        Schema::create('recipe_items', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('recipe_id')->constrained('recipes')->onDelete('cascade');
+            $table->foreignId('product_id')->constrained('products')->comment('原物料商品 ID');
+            $table->decimal('quantity', 10, 4)->comment('標準用量');
+            $table->foreignId('unit_id')->nullable()->constrained('units')->comment('單位 ID');
+            $table->string('remark')->nullable()->comment('備註');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('recipe_items');
+        Schema::dropIfExists('recipes');
+    }
+};

database/migrations/tenant/2026_01_26_000002_add_recipe_permissions.php

@@ -0,0 +1,68 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Spatie\Permission\Models\Permission;
+use Spatie\Permission\Models\Role;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * 
+     * 新增配方管理權限
+     */
+    public function up(): void
+    {
+        $guard = 'web';
+        
+        // 建立配方管理權限
+        $permissions = [
+            'recipes.view' => '檢視配方',
+            'recipes.create' => '建立配方',
+            'recipes.edit' => '編輯配方',
+            'recipes.delete' => '刪除配方',
+        ];
+
+        foreach ($permissions as $name => $description) {
+            Permission::firstOrCreate(
+                ['name' => $name, 'guard_name' => $guard],
+                ['name' => $name, 'guard_name' => $guard]
+            );
+        }
+
+        // 授予 super-admin 所有新權限
+        $superAdmin = Role::where('name', 'super-admin')->first();
+        if ($superAdmin) {
+            $superAdmin->givePermissionTo(array_keys($permissions));
+        }
+
+        // 授予 admin 所有新權限
+        $admin = Role::where('name', 'admin')->first();
+        if ($admin) {
+            $admin->givePermissionTo(array_keys($permissions));
+        }
+
+        // 授予 warehouse-manager 檢視權限 (配方通常與庫存相關)
+        $whManager = Role::where('name', 'warehouse-manager')->first();
+        if ($whManager) {
+            $whManager->givePermissionTo(['recipes.view']);
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        $permissions = [
+            'recipes.view',
+            'recipes.create',
+            'recipes.edit',
+            'recipes.delete',
+        ];
+
+        foreach ($permissions as $name) {
+            Permission::where('name', $name)->delete();
+        }
+    }
+};

database/migrations/tenant/2026_01_26_141823_add_is_sellable_to_warehouses_table.php

@@ -0,0 +1,28 @@
+<?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::table('warehouses', function (Blueprint $table) {
+            $table->boolean('is_sellable')->default(true)->after('description')->comment('是否可銷售');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            $table->dropColumn('is_sellable');
+        });
+    }
+};

database/migrations/tenant/2026_01_26_154522_add_type_and_vehicle_info_to_warehouses_table.php

@@ -0,0 +1,30 @@
+<?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::table('warehouses', function (Blueprint $table) {
+            $table->string('type')->default('standard')->after('description')->comment('倉庫業務類型 (enum)');
+            $table->string('license_plate')->nullable()->after('type')->comment('車牌號碼 (移動倉用)');
+            $table->string('driver_name')->nullable()->after('license_plate')->comment('司機姓名 (移動倉用)');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            $table->dropColumn(['type', 'license_plate', 'driver_name']);
+        });
+    }
+};

database/migrations/tenant/2026_01_26_165104_add_cost_columns_to_inventories_and_transactions.php

@@ -0,0 +1,37 @@
+<?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::table('inventories', function (Blueprint $table) {
+            $table->decimal('unit_cost', 12, 4)->default(0)->after('quantity')->comment('單位成本');
+            $table->decimal('total_value', 12, 4)->default(0)->after('unit_cost')->comment('庫存總價值');
+        });
+
+        Schema::table('inventory_transactions', function (Blueprint $table) {
+            $table->decimal('unit_cost', 12, 4)->nullable()->after('quantity')->comment('異動當下的單位成本');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventory_transactions', function (Blueprint $table) {
+            $table->dropColumn('unit_cost');
+        });
+
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->dropColumn(['unit_cost', 'total_value']);
+        });
+    }
+};

database/migrations/tenant/2026_01_26_171156_add_order_date_to_purchase_orders_table.php

@@ -0,0 +1,28 @@
+<?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::table('purchase_orders', function (Blueprint $table) {
+            $table->date('order_date')->nullable()->after('code');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('purchase_orders', function (Blueprint $table) {
+            $table->dropColumn('order_date');
+        });
+    }
+};

database/seeders/CategorySeeder.php

@@ -2,7 +2,7 @@
 
 namespace Database\Seeders;
 
-use App\Models\Category;
+use App\Modules\Inventory\Models\Category;
 use Illuminate\Database\Seeder;
 
 class CategorySeeder extends Seeder