[FEAT] 優化部署流程：加入 RoleSeeder 與 AdminUserSeeder，並實作權限系統基礎架構與多租戶隔離機制

app/Traits/TenantScoped.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Traits;
+
+use Illuminate\Database\Eloquent\Builder;
+
+trait TenantScoped
+{
+    /**
+     * Boot the trait.
+     */
+    public static function bootTenantScoped(): void
+    {
+        static::addGlobalScope('tenant', function (Builder $query) {
+            $user = auth()->user();
+            
+            // 如果使用者已登入且有綁定公司，則自動注入過濾條件
+            if ($user && $user->company_id) {
+                $query->where((new static)->getTable() . '.company_id', $user->company_id);
+            }
+        });
+
+        // 建立資料時，自動填入當前使用者的 company_id
+        static::creating(function ($model) {
+            if (!$model->company_id) {
+                $user = auth()->user();
+                if ($user && $user->company_id) {
+                    $model->company_id = $user->company_id;
+                }
+            }
+        });
+    }
+
+    /**
+     * Define the company relationship.
+     */
+    public function company()
+    {
+        return $this->belongsTo(\App\Models\System\Company::class);
+    }
+}