[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/Http/Middleware/EnsureTenantAccess.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureTenantAccess
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        $user = auth()->user();
+
+        // 如果是租戶帳號，檢查公司狀態
+        if ($user && $user->isTenant()) {
+            $company = $user->company;
+
+            if (!$company || $company->status === 0) {
+                auth()->logout();
+                return redirect()->route('login')->with('error', __('Your account is associated with a deactivated company.'));
+            }
+
+            if ($company->valid_until && $company->valid_until->isPast()) {
+                auth()->logout();
+                return redirect()->route('login')->with('error', __('Your company contract has expired.'));
+            }
+        }
+
+        return $next($request);
+    }
+}