diff --git a/.agent/skills/permission-management/SKILL.md b/.agent/skills/permission-management/SKILL.md
new file mode 100644
index 0000000..c7e3661
--- /dev/null
+++ b/.agent/skills/permission-management/SKILL.md
@@ -0,0 +1,119 @@
+---
+name: 權限管理與實作規範
+description: 為新功能實作權限控制的完整流程規範，包含後端 Seeder 設定、Middleware 路由保護與前端權限判斷。
+---
+
+# 權限管理與實作規範
+
+本文件說明如何在新增功能時，一併實作完整的權限控制機制。專案採用 `spatie/laravel-permission` 套件進行權限管理。
+
+## 1. 定義權限 (Backend)
+
+所有權限皆定義於 `database/seeders/PermissionSeeder.php`。
+
+### 步驟：
+
+1.  開啟 `database/seeders/PermissionSeeder.php`。
+2.  在 `$permissions` 陣列中新增功能對應的權限字串。
+    *   **命名慣例**：`{resource}.{action}` (例如：`system.view_logs`, `products.create`)
+    *   常用動作：`view`, `create`, `edit`, `delete`, `publish`, `export`
+3.  在下方「角色分配」區段，將新權限分配給適合的角色。
+    *   `super-admin`：通常擁有所有權限（程式碼中 `Permission::all()` 自動涵蓋，無需手動新增）。
+    *   `admin`：通常擁有大部分權限。
+    *   其他角色 (`warehouse-manager`, `purchaser`, `viewer`)：依業務邏輯分配。
+
+### 範例：
+
+```php
+// 1. 新增權限字串
+$permissions = [
+    // ... 現有權限
+    'system.view_logs', // 新增：檢視系統日誌
+];
+
+// ...
+
+// 2. 分配給角色
+$admin->givePermissionTo([
+    // ... 現有權限
+    'system.view_logs',
+]);
+```
+
+## 2. 套用資料庫變更
+
+修改 Seeder 後，必須重新執行 Seeder 以將權限寫入資料庫。
+
+```bash
+# 對於所有租戶執行 Seeder (開發環境)
+php artisan tenants:seed --class=PermissionSeeder
+```
+
+## 3. 路由保護 (Backend Middleware)
+
+在 `routes/web.php` 中，使用 `permission:{name}` middleware 保護路由。
+
+### 範例：
+
+```php
+// 單一權限保護
+Route::get('/logs', [LogController::class, 'index'])
+    ->middleware('permission:system.view_logs')
+    ->name('logs.index');
+
+// 路由群組保護
+Route::middleware('permission:products.view')->group(function () {
+    // ...
+});
+
+// 多重權限 (OR 邏輯：有其一即可)
+Route::middleware('permission:products.create|products.edit')->group(function () {
+    // ...
+});
+```
+
+## 4. 前端權限判斷 (React Component)
+
+使用自訂 Hook `usePermission` 來控制 UI 元素的顯示（例如：隱藏沒有權限的按鈕）。
+
+### 引入 Hook：
+
+```tsx
+import { usePermission } from "@/hooks/usePermission";
+```
+
+### 使用方式：
+
+```tsx
+export default function ProductIndex() {
+    const { can } = usePermission();
+
+    return (
+        <div>
+            <h1>商品列表</h1>
+            
+            {/* 只有擁有 create 權限才顯示按鈕 */}
+            {can('products.create') && (
+                <Button>新增商品</Button>
+            )}
+
+            {/* 組合判斷 */}
+            {can('products.edit') && <EditButton />}
+        </div>
+    );
+}
+```
+
+### 權限 Hook 介面說明：
+
+- `can(permission: string)`: 檢查當前使用者是否擁有指定權限。
+- `canAny(permissions: string[])`: 檢查當前使用者是否擁有陣列中**任一**權限。
+- `hasRole(role: string)`: 檢查當前使用者是否擁有指定角色。
+
+## 檢核清單
+
+- [ ] `PermissionSeeder.php` 已新增權限字串。
+- [ ] `PermissionSeeder.php` 已將新權限分配給對應角色。
+- [ ] 已執行 `php artisan tenants:seed --class=PermissionSeeder` 更新資料庫。
+- [ ] 後端路由 (`routes/web.php`) 已加上 middleware 保護。
+- [ ] 前端頁面/按鈕已使用 `usePermission` 進行顯示控制。
diff --git a/app/Http/Controllers/Admin/ActivityLogController.php b/app/Http/Controllers/Admin/ActivityLogController.php
new file mode 100644
index 0000000..5897dba
--- /dev/null
+++ b/app/Http/Controllers/Admin/ActivityLogController.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Spatie\Activitylog\Models\Activity;
+
+class ActivityLogController extends Controller
+{
+    public function index(Request $request)
+    {
+        $activities = Activity::with('causer')
+            ->latest()
+            ->paginate($request->input('per_page', 10))
+            ->through(function ($activity) {
+                $subjectMap = [
+                    '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',
+                ];
+
+                $eventMap = [
+                    'created' => '新增',
+                    'updated' => '更新',
+                    'deleted' => '刪除',
+                ];
+
+                return [
+                    'id' => $activity->id,
+                    'description' => $eventMap[$activity->event] ?? $activity->event,
+                    'subject_type' => $subjectMap[$activity->subject_type] ?? class_basename($activity->subject_type),
+                    'event' => $activity->event,
+                    'causer' => $activity->causer ? $activity->causer->name : 'System',
+                    'created_at' => $activity->created_at->format('Y-m-d H:i:s'),
+                    'properties' => $activity->properties,
+                ];
+            });
+
+        return Inertia::render('Admin/ActivityLog/Index', [
+            'activities' => $activities,
+            'filters' => [
+                'per_page' => $request->input('per_page', '10'),
+            ],
+        ]);
+    }
+}
diff --git a/app/Models/Category.php b/app/Models/Category.php
index a10777e..4e1f2e2 100644
--- a/app/Models/Category.php
+++ b/app/Models/Category.php
@@ -5,10 +5,11 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Spatie\Activitylog\Traits\LogsActivity;
 
 class Category extends Model
 {
-    use HasFactory;
+    use HasFactory, LogsActivity;
 
     protected $fillable = [
         'name',
@@ -27,4 +28,12 @@ class Category extends Model
     {
         return $this->hasMany(Product::class);
     }
+
+    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    {
+        return \Spatie\Activitylog\LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
 }
diff --git a/app/Models/Product.php b/app/Models/Product.php
index 6d63bef..ef269c7 100644
--- a/app/Models/Product.php
+++ b/app/Models/Product.php
@@ -6,10 +6,13 @@ use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
 
 class Product extends Model
 {
-    use HasFactory, SoftDeletes;
+    use HasFactory, LogsActivity, SoftDeletes;
 
     protected $fillable = [
         'code',
@@ -60,6 +63,19 @@ class Product extends Model
         return $this->hasMany(Inventory::class);
     }
 
+    public function transactions(): HasMany
+    {
+        return $this->hasMany(InventoryTransaction::class);
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+
     public function warehouses(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
     {
         return $this->belongsToMany(Warehouse::class, 'inventories')
diff --git a/app/Models/PurchaseOrder.php b/app/Models/PurchaseOrder.php
index d6d7213..d4acc7b 100644
--- a/app/Models/PurchaseOrder.php
+++ b/app/Models/PurchaseOrder.php
@@ -6,10 +6,12 @@ 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;
+    use HasFactory, LogsActivity;
 
     protected $fillable = [
         'code',
@@ -125,4 +127,12 @@ class PurchaseOrder extends Model
     {
         return $this->hasMany(PurchaseOrderItem::class);
     }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
 }
diff --git a/app/Models/Role.php b/app/Models/Role.php
new file mode 100644
index 0000000..4fd89e5
--- /dev/null
+++ b/app/Models/Role.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Models;
+
+use Spatie\Permission\Models\Role as SpatieRole;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class Role extends SpatieRole
+{
+    use LogsActivity;
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+}
diff --git a/app/Models/Unit.php b/app/Models/Unit.php
index bcfddfd..00a1cc5 100644
--- a/app/Models/Unit.php
+++ b/app/Models/Unit.php
@@ -4,14 +4,23 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Spatie\Activitylog\Traits\LogsActivity;
 
 class Unit extends Model
 {
     /** @use HasFactory<\Database\Factories\UnitFactory> */
-    use HasFactory;
+    use HasFactory, LogsActivity;
 
     protected $fillable = [
         'name',
         'code',
     ];
+
+    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    {
+        return \Spatie\Activitylog\LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
 }
diff --git a/app/Models/User.php b/app/Models/User.php
index 0e4d418..6b85850 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -7,11 +7,13 @@ use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Spatie\Permission\Traits\HasRoles;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
 
 class User extends Authenticatable
 {
     /** @use HasFactory<\Database\Factories\UserFactory> */
-    use HasFactory, Notifiable, HasRoles;
+    use HasFactory, Notifiable, HasRoles, LogsActivity;
 
     /**
      * The attributes that are mass assignable.
@@ -47,4 +49,12 @@ class User extends Authenticatable
             'password' => 'hashed',
         ];
     }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
 }
diff --git a/app/Models/Vendor.php b/app/Models/Vendor.php
index 14f4256..6e0be0d 100644
--- a/app/Models/Vendor.php
+++ b/app/Models/Vendor.php
@@ -5,9 +5,13 @@ namespace App\Models;
 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;
+
     protected $fillable = [
         'code',
         'name',
@@ -32,4 +36,12 @@ class Vendor extends Model
     {
         return $this->hasMany(PurchaseOrder::class);
     }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logAll()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
 }
diff --git a/composer.json b/composer.json
index b04034e..92237b2 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,7 @@
         "inertiajs/inertia-laravel": "^2.0",
         "laravel/framework": "^12.0",
         "laravel/tinker": "^2.10.1",
+        "spatie/laravel-activitylog": "^4.10",
         "spatie/laravel-permission": "^6.24",
         "stancl/tenancy": "^3.9",
         "tightenco/ziggy": "^2.6"
diff --git a/composer.lock b/composer.lock
index 2c30e85..deb4f73 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "931b01f076d9ee28568cd36f178a0c04",
+    "content-hash": "131ea6e8cc24a6a55229afded6bd9014",
     "packages": [
         {
             "name": "brick/math",
@@ -3413,6 +3413,158 @@
             },
             "time": "2025-12-14T04:43:48+00:00"
         },
+        {
+            "name": "spatie/laravel-activitylog",
+            "version": "4.10.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/laravel-activitylog.git",
+                "reference": "bb879775d487438ed9a99e64f09086b608990c10"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/laravel-activitylog/zipball/bb879775d487438ed9a99e64f09086b608990c10",
+                "reference": "bb879775d487438ed9a99e64f09086b608990c10",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/config": "^8.0 || ^9.0 || ^10.0 || ^11.0 || ^12.0",
+                "illuminate/database": "^8.69 || ^9.27 || ^10.0 || ^11.0 || ^12.0",
+                "illuminate/support": "^8.0 || ^9.0 || ^10.0 || ^11.0 || ^12.0",
+                "php": "^8.1",
+                "spatie/laravel-package-tools": "^1.6.3"
+            },
+            "require-dev": {
+                "ext-json": "*",
+                "orchestra/testbench": "^6.23 || ^7.0 || ^8.0 || ^9.0 || ^10.0",
+                "pestphp/pest": "^1.20 || ^2.0 || ^3.0"
+            },
+            "type": "library",
+            "extra": {
+                "laravel": {
+                    "providers": [
+                        "Spatie\\Activitylog\\ActivitylogServiceProvider"
+                    ]
+                }
+            },
+            "autoload": {
+                "files": [
+                    "src/helpers.php"
+                ],
+                "psr-4": {
+                    "Spatie\\Activitylog\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian De Deyne",
+                    "email": "sebastian@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Tom Witkowski",
+                    "email": "dev.gummibeer@gmail.com",
+                    "homepage": "https://gummibeer.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A very simple activity logger to monitor the users of your website or application",
+            "homepage": "https://github.com/spatie/activitylog",
+            "keywords": [
+                "activity",
+                "laravel",
+                "log",
+                "spatie",
+                "user"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/laravel-activitylog/issues",
+                "source": "https://github.com/spatie/laravel-activitylog/tree/4.10.2"
+            },
+            "funding": [
+                {
+                    "url": "https://spatie.be/open-source/support-us",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-06-15T06:59:49+00:00"
+        },
+        {
+            "name": "spatie/laravel-package-tools",
+            "version": "1.92.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/laravel-package-tools.git",
+                "reference": "f09a799850b1ed765103a4f0b4355006360c49a5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/laravel-package-tools/zipball/f09a799850b1ed765103a4f0b4355006360c49a5",
+                "reference": "f09a799850b1ed765103a4f0b4355006360c49a5",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/contracts": "^9.28|^10.0|^11.0|^12.0",
+                "php": "^8.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.5",
+                "orchestra/testbench": "^7.7|^8.0|^9.0|^10.0",
+                "pestphp/pest": "^1.23|^2.1|^3.1",
+                "phpunit/php-code-coverage": "^9.0|^10.0|^11.0",
+                "phpunit/phpunit": "^9.5.24|^10.5|^11.5",
+                "spatie/pest-plugin-test-time": "^1.1|^2.2"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Spatie\\LaravelPackageTools\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Tools for creating Laravel packages",
+            "homepage": "https://github.com/spatie/laravel-package-tools",
+            "keywords": [
+                "laravel-package-tools",
+                "spatie"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/laravel-package-tools/issues",
+                "source": "https://github.com/spatie/laravel-package-tools/tree/1.92.7"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-07-17T15:46:43+00:00"
+        },
         {
             "name": "spatie/laravel-permission",
             "version": "6.24.0",
diff --git a/config/activitylog.php b/config/activitylog.php
new file mode 100644
index 0000000..f1262f5
--- /dev/null
+++ b/config/activitylog.php
@@ -0,0 +1,52 @@
+<?php
+
+return [
+
+    /*
+     * If set to false, no activities will be saved to the database.
+     */
+    'enabled' => env('ACTIVITY_LOGGER_ENABLED', true),
+
+    /*
+     * When the clean-command is executed, all recording activities older than
+     * the number of days specified here will be deleted.
+     */
+    'delete_records_older_than_days' => 365,
+
+    /*
+     * If no log name is passed to the activity() helper
+     * we use this default log name.
+     */
+    'default_log_name' => 'default',
+
+    /*
+     * You can specify an auth driver here that gets user models.
+     * If this is null we'll use the current Laravel auth driver.
+     */
+    'default_auth_driver' => null,
+
+    /*
+     * If set to true, the subject returns soft deleted models.
+     */
+    'subject_returns_soft_deleted_models' => false,
+
+    /*
+     * This model will be used to log activity.
+     * It should implement the Spatie\Activitylog\Contracts\Activity interface
+     * and extend Illuminate\Database\Eloquent\Model.
+     */
+    'activity_model' => \Spatie\Activitylog\Models\Activity::class,
+
+    /*
+     * This is the name of the table that will be created by the migration and
+     * used by the Activity model shipped with this package.
+     */
+    'table_name' => env('ACTIVITY_LOGGER_TABLE_NAME', 'activity_log'),
+
+    /*
+     * This is the database connection that will be used by the migration and
+     * the Activity model shipped with this package. In case it's not set
+     * Laravel's database.default will be used instead.
+     */
+    'database_connection' => env('ACTIVITY_LOGGER_DB_CONNECTION'),
+];
diff --git a/config/permission.php b/config/permission.php
index f39f6b5..03bf909 100644
--- a/config/permission.php
+++ b/config/permission.php
@@ -24,7 +24,7 @@ return [
          * `Spatie\Permission\Contracts\Role` contract.
          */
 
-        'role' => Spatie\Permission\Models\Role::class,
+        'role' => App\Models\Role::class,
 
     ],
 
diff --git a/database/migrations/tenant/2026_01_16_152857_create_activity_log_table.php b/database/migrations/tenant/2026_01_16_152857_create_activity_log_table.php
new file mode 100644
index 0000000..7c05bc8
--- /dev/null
+++ b/database/migrations/tenant/2026_01_16_152857_create_activity_log_table.php
@@ -0,0 +1,27 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateActivityLogTable extends Migration
+{
+    public function up()
+    {
+        Schema::connection(config('activitylog.database_connection'))->create(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->bigIncrements('id');
+            $table->string('log_name')->nullable();
+            $table->text('description');
+            $table->nullableMorphs('subject', 'subject');
+            $table->nullableMorphs('causer', 'causer');
+            $table->json('properties')->nullable();
+            $table->timestamps();
+            $table->index('log_name');
+        });
+    }
+
+    public function down()
+    {
+        Schema::connection(config('activitylog.database_connection'))->dropIfExists(config('activitylog.table_name'));
+    }
+}
diff --git a/database/migrations/tenant/2026_01_16_152858_add_event_column_to_activity_log_table.php b/database/migrations/tenant/2026_01_16_152858_add_event_column_to_activity_log_table.php
new file mode 100644
index 0000000..7b797fd
--- /dev/null
+++ b/database/migrations/tenant/2026_01_16_152858_add_event_column_to_activity_log_table.php
@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddEventColumnToActivityLogTable extends Migration
+{
+    public function up()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->string('event')->nullable()->after('subject_type');
+        });
+    }
+
+    public function down()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->dropColumn('event');
+        });
+    }
+}
diff --git a/database/migrations/tenant/2026_01_16_152859_add_batch_uuid_column_to_activity_log_table.php b/database/migrations/tenant/2026_01_16_152859_add_batch_uuid_column_to_activity_log_table.php
new file mode 100644
index 0000000..8f7db66
--- /dev/null
+++ b/database/migrations/tenant/2026_01_16_152859_add_batch_uuid_column_to_activity_log_table.php
@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddBatchUuidColumnToActivityLogTable extends Migration
+{
+    public function up()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->uuid('batch_uuid')->nullable()->after('properties');
+        });
+    }
+
+    public function down()
+    {
+        Schema::connection(config('activitylog.database_connection'))->table(config('activitylog.table_name'), function (Blueprint $table) {
+            $table->dropColumn('batch_uuid');
+        });
+    }
+}
diff --git a/database/seeders/PermissionSeeder.php b/database/seeders/PermissionSeeder.php
index 4ffdf3d..10419a8 100644
--- a/database/seeders/PermissionSeeder.php
+++ b/database/seeders/PermissionSeeder.php
@@ -60,6 +60,9 @@ class PermissionSeeder extends Seeder
             'roles.create',
             'roles.edit',
             'roles.delete',
+
+            // 系統日誌
+            'system.view_logs',
         ];
 
         foreach ($permissions as $permission) {
@@ -87,6 +90,7 @@ class PermissionSeeder extends Seeder
             'vendors.view', 'vendors.create', 'vendors.edit', 'vendors.delete',
             'warehouses.view', 'warehouses.create', 'warehouses.edit', 'warehouses.delete',
             'users.view', 'users.create', 'users.edit',
+            'system.view_logs',
         ]);
 
         // warehouse-manager 管理庫存與倉庫
diff --git a/resources/js/Layouts/AuthenticatedLayout.tsx b/resources/js/Layouts/AuthenticatedLayout.tsx
index b9cb3aa..7e0a9c9 100644
--- a/resources/js/Layouts/AuthenticatedLayout.tsx
+++ b/resources/js/Layouts/AuthenticatedLayout.tsx
@@ -16,7 +16,8 @@ import {
     ChevronDown,
     Settings,
     Shield,
-    Users
+    Users,
+    FileText
 } from "lucide-react";
 import { toast, Toaster } from "sonner";
 import { useState, useEffect, useMemo } from "react";
@@ -145,6 +146,13 @@ export default function AuthenticatedLayout({
                     route: "/admin/roles",
                     permission: "roles.view",
                 },
+                {
+                    id: "activity-log",
+                    label: "操作紀錄",
+                    icon: <FileText className="h-4 w-4" />,
+                    route: "/admin/activity-logs",
+                    permission: "system.view_logs",
+                },
             ],
         },
     ];
diff --git a/resources/js/Pages/Admin/ActivityLog/ActivityDetailDialog.tsx b/resources/js/Pages/Admin/ActivityLog/ActivityDetailDialog.tsx
new file mode 100644
index 0000000..f5808a9
--- /dev/null
+++ b/resources/js/Pages/Admin/ActivityLog/ActivityDetailDialog.tsx
@@ -0,0 +1,142 @@
+import {
+    Dialog,
+    DialogContent,
+    DialogDescription,
+    DialogHeader,
+    DialogTitle,
+} from "@/Components/ui/dialog";
+import { Badge } from "@/Components/ui/badge";
+import { ScrollArea } from "@/Components/ui/scroll-area";
+
+interface Activity {
+    id: number;
+    description: string;
+    subject_type: string;
+    event: string;
+    causer: string;
+    created_at: string;
+    properties: {
+        attributes?: Record<string, any>;
+        old?: Record<string, any>;
+    };
+}
+
+interface Props {
+    open: boolean;
+    onOpenChange: (open: boolean) => void;
+    activity: Activity | null;
+}
+
+export default function ActivityDetailDialog({ open, onOpenChange, activity }: Props) {
+    if (!activity) return null;
+
+    const attributes = activity.properties?.attributes || {};
+    const old = activity.properties?.old || {};
+
+    // Get all keys from both attributes and old to ensure we show all changes
+    const allKeys = Array.from(new Set([...Object.keys(attributes), ...Object.keys(old)]));
+
+    // Filter out internal keys often logged but not useful for users
+    const filteredKeys = allKeys.filter(key =>
+        !['created_at', 'updated_at', 'deleted_at', 'id'].includes(key)
+    );
+
+    const getEventBadgeColor = (event: string) => {
+        switch (event) {
+            case 'created': return 'bg-green-500';
+            case 'updated': return 'bg-blue-500';
+            case 'deleted': return 'bg-red-500';
+            default: return 'bg-gray-500';
+        }
+    };
+
+    const getEventLabel = (event: string) => {
+        switch (event) {
+            case 'created': return '新增';
+            case 'updated': return '更新';
+            case 'deleted': return '刪除';
+            default: return event;
+        }
+    };
+
+    const formatValue = (value: any) => {
+        if (value === null || value === undefined) return <span className="text-gray-400">-</span>;
+        if (typeof value === 'boolean') return value ? '是' : '否';
+        if (typeof value === 'object') return JSON.stringify(value);
+        return String(value);
+    };
+
+    return (
+        <Dialog open={open} onOpenChange={onOpenChange}>
+            <DialogContent className="max-w-2xl">
+                <DialogHeader>
+                    <DialogTitle className="flex items-center gap-2">
+                        操作詳情
+                        <Badge className={getEventBadgeColor(activity.event)}>
+                            {getEventLabel(activity.event)}
+                        </Badge>
+                    </DialogTitle>
+                    <DialogDescription>
+                        {activity.created_at} 由 {activity.causer} 執行的操作
+                    </DialogDescription>
+                </DialogHeader>
+
+                <div className="mt-4 space-y-4">
+                    <div className="grid grid-cols-2 gap-4 text-sm">
+                        <div>
+                            <span className="text-gray-500">操作對象：</span>
+                            <span className="font-medium ml-2">{activity.subject_type}</span>
+                        </div>
+                        <div>
+                            <span className="text-gray-500">描述：</span>
+                            <span className="font-medium ml-2">{activity.description}</span>
+                        </div>
+                    </div>
+
+                    {activity.event === 'created' ? (
+                        <div className="bg-gray-50 p-4 rounded-md text-center text-gray-500 text-sm">
+                            已新增資料 (初始建立)
+                        </div>
+                    ) : (
+                        <div className="border rounded-md">
+                            <div className="grid grid-cols-3 bg-gray-50 p-2 text-sm font-medium text-gray-500">
+                                <div>欄位</div>
+                                <div>異動前</div>
+                                <div>異動後</div>
+                            </div>
+                            <ScrollArea className="h-[300px]">
+                                {filteredKeys.length > 0 ? (
+                                    <div className="divide-y">
+                                        {filteredKeys.map((key) => {
+                                            const oldValue = old[key];
+                                            const newValue = attributes[key];
+                                            // Ensure we catch changes even if one value is missing/null
+                                            // For deleted events, newValue might be empty, so we just show oldValue
+                                            const isChanged = JSON.stringify(oldValue) !== JSON.stringify(newValue);
+
+                                            return (
+                                                <div key={key} className={`grid grid-cols-3 p-2 text-sm ${isChanged ? 'bg-yellow-50/30' : ''}`}>
+                                                    <div className="font-medium text-gray-700">{key}</div>
+                                                    <div className="text-gray-600 break-words pr-2">
+                                                        {formatValue(oldValue)}
+                                                    </div>
+                                                    <div className="text-gray-900 break-words font-medium">
+                                                        {activity.event === 'deleted' ? '-' : formatValue(newValue)}
+                                                    </div>
+                                                </div>
+                                            );
+                                        })}
+                                    </div>
+                                ) : (
+                                    <div className="p-8 text-center text-gray-500 text-sm">
+                                        無詳細異動內容
+                                    </div>
+                                )}
+                            </ScrollArea>
+                        </div>
+                    )}
+                </div>
+            </DialogContent>
+        </Dialog>
+    );
+}
diff --git a/resources/js/Pages/Admin/ActivityLog/Index.tsx b/resources/js/Pages/Admin/ActivityLog/Index.tsx
new file mode 100644
index 0000000..3c9b052
--- /dev/null
+++ b/resources/js/Pages/Admin/ActivityLog/Index.tsx
@@ -0,0 +1,203 @@
+import { useState } from 'react';
+import AuthenticatedLayout from '@/Layouts/AuthenticatedLayout';
+import { Head, router } from '@inertiajs/react';
+import { PageProps } from '@/types/global';
+import {
+    Table,
+    TableBody,
+    TableCell,
+    TableHead,
+    TableHeader,
+    TableRow,
+} from "@/Components/ui/table";
+import { Badge } from "@/Components/ui/badge";
+import Pagination from '@/Components/shared/Pagination';
+import { SearchableSelect } from "@/Components/ui/searchable-select";
+import { FileText, Eye } from 'lucide-react';
+import { format } from 'date-fns';
+import { Button } from '@/Components/ui/button';
+import ActivityDetailDialog from './ActivityDetailDialog';
+
+interface Activity {
+    id: number;
+    description: string;
+    subject_type: string;
+    event: string;
+    causer: string;
+    created_at: string;
+    properties: any;
+}
+
+interface PaginationLinks {
+    url: string | null;
+    label: string;
+    active: boolean;
+}
+
+interface Props extends PageProps {
+    activities: {
+        data: Activity[];
+        links: PaginationLinks[];
+        current_page: number;
+        last_page: number;
+        total: number;
+        from: number;
+    };
+    filters: {
+        per_page?: string;
+    };
+}
+
+export default function ActivityLogIndex({ activities, filters }: Props) {
+    const [perPage, setPerPage] = useState<string>(filters.per_page || "10");
+    const [selectedActivity, setSelectedActivity] = useState<Activity | null>(null);
+    const [detailOpen, setDetailOpen] = useState(false);
+
+    const getEventBadgeColor = (event: string) => {
+        switch (event) {
+            case 'created': return 'bg-green-500 hover:bg-green-600';
+            case 'updated': return 'bg-blue-500 hover:bg-blue-600';
+            case 'deleted': return 'bg-red-500 hover:bg-red-600';
+            default: return 'bg-gray-500 hover:bg-gray-600';
+        }
+    };
+
+    const getEventLabel = (event: string) => {
+        switch (event) {
+            case 'created': return '新增';
+            case 'updated': return '更新';
+            case 'deleted': return '刪除';
+            default: return event;
+        }
+    };
+
+    const handleViewDetail = (activity: Activity) => {
+        setSelectedActivity(activity);
+        setDetailOpen(true);
+    };
+
+
+
+    const handlePerPageChange = (value: string) => {
+        setPerPage(value);
+        router.get(
+            route('activity-logs.index'),
+            { per_page: value },
+            { preserveState: false, replace: true, preserveScroll: true }
+        );
+    };
+
+    return (
+        <AuthenticatedLayout
+            breadcrumbs={[
+                { label: '系統管理', href: '#' },
+                { label: '操作紀錄', href: route('activity-logs.index'), isPage: true },
+            ]}
+        >
+            <Head title="操作紀錄" />
+
+            <div className="container mx-auto p-6 max-w-7xl">
+                <div className="flex items-center justify-between mb-6">
+                    <div>
+                        <h1 className="text-2xl font-bold text-grey-0 flex items-center gap-2">
+                            <FileText className="h-6 w-6 text-primary-main" />
+                            操作紀錄
+                        </h1>
+                        <p className="text-gray-500 mt-1">
+                            檢視系統內的所有操作活動，包含新增、修改與刪除紀錄
+                        </p>
+                    </div>
+                </div>
+
+                <div className="bg-white rounded-xl border border-gray-200 shadow-sm overflow-hidden">
+                    <Table>
+                        <TableHeader className="bg-gray-50">
+                            <TableRow>
+                                <TableHead className="w-[180px]">時間</TableHead>
+                                <TableHead className="w-[150px]">操作人員</TableHead>
+                                <TableHead className="w-[100px] text-center">動作</TableHead>
+                                <TableHead className="w-[150px]">對象</TableHead>
+                                <TableHead>描述</TableHead>
+                                <TableHead className="w-[100px] text-center">操作</TableHead>
+                            </TableRow>
+                        </TableHeader>
+                        <TableBody>
+                            {activities.data.length > 0 ? (
+                                activities.data.map((activity) => (
+                                    <TableRow key={activity.id}>
+                                        <TableCell className="text-gray-500 font-medium whitespace-nowrap">
+                                            {activity.created_at}
+                                        </TableCell>
+                                        <TableCell>
+                                            <span className="font-medium text-gray-900">{activity.causer}</span>
+                                        </TableCell>
+                                        <TableCell className="text-center">
+                                            <Badge className={getEventBadgeColor(activity.event)}>
+                                                {getEventLabel(activity.event)}
+                                            </Badge>
+                                        </TableCell>
+                                        <TableCell>
+                                            <Badge variant="outline" className="bg-slate-50">
+                                                {activity.subject_type}
+                                            </Badge>
+                                        </TableCell>
+                                        <TableCell className="text-gray-600" title={activity.description}>
+                                            <div className="flex items-center gap-2">
+                                                <span>{activity.causer}</span>
+                                                <span className="text-gray-400">執行了</span>
+                                                <span className="font-medium text-gray-700">{activity.description}</span>
+                                                <span className="text-gray-400">動作</span>
+                                            </div>
+                                        </TableCell>
+                                        <TableCell className="text-center">
+                                            <Button
+                                                variant="outline"
+                                                size="sm"
+                                                onClick={() => handleViewDetail(activity)}
+                                                className="button-outlined-info"
+                                            >
+                                                <Eye className="h-4 w-4" />
+                                            </Button>
+                                        </TableCell>
+                                    </TableRow>
+                                ))
+                            ) : (
+                                <TableRow>
+                                    <TableCell colSpan={5} className="text-center py-8 text-gray-500">
+                                        尚無操作紀錄
+                                    </TableCell>
+                                </TableRow>
+                            )}
+                        </TableBody>
+                    </Table>
+                </div>
+
+                <div className="mt-4 flex flex-col sm:flex-row items-center justify-between gap-4">
+                    <div className="flex items-center gap-2 text-sm text-gray-500">
+                        <span>每頁顯示</span>
+                        <SearchableSelect
+                            value={perPage}
+                            onValueChange={handlePerPageChange}
+                            options={[
+                                { label: "10", value: "10" },
+                                { label: "20", value: "20" },
+                                { label: "50", value: "50" },
+                                { label: "100", value: "100" }
+                            ]}
+                            className="w-[80px] h-8"
+                            showSearch={false}
+                        />
+                        <span>筆</span>
+                    </div>
+                    <Pagination links={activities.links} />
+                </div>
+            </div>
+
+            <ActivityDetailDialog
+                open={detailOpen}
+                onOpenChange={setDetailOpen}
+                activity={selectedActivity}
+            />
+        </AuthenticatedLayout>
+    );
+}
diff --git a/routes/web.php b/routes/web.php
index 02f6616..2771dbe 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -16,6 +16,7 @@ use App\Http\Controllers\TransferOrderController;
 use App\Http\Controllers\UnitController;
 use App\Http\Controllers\Admin\RoleController;
 use App\Http\Controllers\Admin\UserController;
+use App\Http\Controllers\Admin\ActivityLogController;
 use App\Http\Controllers\ProfileController;
 use Stancl\Tenancy\Middleware\InitializeTenancyByDomainOrSubdomain;
 
@@ -147,8 +148,13 @@ Route::middleware('auth')->group(function () {
             });
             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::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');
+        });
     });
 
 }); // End of auth middleware group