[FEAT] 完善全站多語系支援、角色權限篩選優化及 UI 元件重構

- [DOCS] 補齊 en, ja, zh_TW 語系檔翻譯並完善驗證錯誤訊息 (validation.php)
- [FEAT] 角色權限頁面新增「所屬單位」篩選功能 (僅限系統管理員)
- [STYLE] 優化角色列表顯示，將「類型」變更為具體「所屬單位」名稱
- [STYLE] 修正角色頁面工具列佈局，搜尋框置前並修正下拉箭頭顯示
- [REFACTOR] 統一全站刪除確認視窗，導入新版 <x-delete-confirm-modal /> 組件
- [REFACTOR] 優化 PermissionController 查詢效能 (Eager Loading)
- [FIX] 修正 RoleSeeder 角色命名與資料庫同步邏輯

tests/Feature/RoleDeletionTest.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\System\Company;
+use App\Models\System\User;
+use App\Models\System\Role;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class RoleDeletionTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->artisan('db:seed', ['--class' => 'RoleSeeder']);
+    }
+
+    public function test_cannot_delete_role_with_active_users()
+    {
+        $company = Company::create([
+            'name' => 'Test Company',
+            'code' => 'TEST',
+            'status' => 1,
+        ]);
+        $admin = User::create([
+            'name' => 'Admin User',
+            'username' => 'admin_user_' . uniqid(),
+            'email' => 'admin_' . uniqid() . '@example.com',
+            'password' => bcrypt('password'),
+            'company_id' => $company->id,
+        ]);
+        $admin->assignRole('super-admin');
+
+        $role = Role::create([
+            'name' => 'Test Role',
+            'company_id' => $company->id,
+            'guard_name' => 'web',
+            'is_system' => false,
+        ]);
+
+        $user = User::create([
+            'name' => 'Test User',
+            'username' => 'test_user_' . uniqid(),
+            'email' => 'user_' . uniqid() . '@example.com',
+            'password' => bcrypt('password'),
+            'company_id' => $company->id,
+        ]);
+        $user->assignRole($role);
+
+        $response = $this->actingAs($admin)
+            ->delete(route('admin.permission.roles.destroy', $role->id));
+
+        $response->assertRedirect();
+        $response->assertSessionHas('error', __('Cannot delete role with active users.'));
+        $this->assertDatabaseHas('roles', ['id' => $role->id]);
+    }
+
+    public function test_can_delete_role_without_active_users()
+    {
+        $company = Company::create([
+            'name' => 'Test Company 2',
+            'code' => 'TEST2',
+            'status' => 1,
+        ]);
+        $admin = User::create([
+            'name' => 'Admin User 2',
+            'username' => 'admin_user_2_' . uniqid(),
+            'email' => 'admin2_' . uniqid() . '@example.com',
+            'password' => bcrypt('password'),
+            'company_id' => $company->id,
+        ]);
+        $admin->assignRole('super-admin');
+
+        $role = Role::create([
+            'name' => 'Empty Role',
+            'company_id' => $company->id,
+            'guard_name' => 'web',
+            'is_system' => false,
+        ]);
+
+        $response = $this->actingAs($admin)
+            ->delete(route('admin.permission.roles.destroy', $role->id));
+
+        $response->assertRedirect();
+        $response->assertSessionHas('success');
+        $this->assertDatabaseMissing('roles', ['id' => $role->id]);
+    }
+}