feat: 第一阶段基础框架搭建

后端 (Laravel 10 + Sanctum):
- RBAC 四层权限系统 (users→roles→permissions→menus)
- 门店隔离中间件 (BelongsToStore Trait + StoreIsolation Middleware)
- 操作日志中间件 (自动记录写操作)
- 权限检查中间件 (CheckPermission)
- 16张数据库表迁移 (系统基础+RBAC+字典+配置)
- 11个 Eloquent Model
- Auth API (登录/登出/用户信息)
- 系统设置模块 CRUD (门店/部门/职务/用户/角色/菜单/权限/字典/日志)
- 45条 RESTful API 路由
- InitSeeder 初始数据 (超管/角色/76权限/31菜单)

前端 (Vue 3 + Element Plus + Vite):
- Axios 请求封装 + Token 注入
- Pinia 状态管理 (user + permission store)
- 动态路由 (服务端菜单→前端路由自动生成)
- 后台布局 (侧边栏+顶栏+主内容区)
- 登录页 + 仪表盘首页
- 系统设置 7 个 CRUD 页面

技术方案文档 (7卷):
- 技术总览/数据库设计/API规范/RBAC设计/模块详设/小程序设计/部署方案

backend/config/filesystems.php

@@ -0,0 +1,80 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Default Filesystem Disk
+    |--------------------------------------------------------------------------
+    |
+    | Here you may specify the default filesystem disk that should be used
+    | by the framework. The "local" disk, as well as a variety of cloud
+    | based disks are available to your application for file storage.
+    |
+    */
+
+    'default' => env('FILESYSTEM_DISK', 'local'),
+
+    /*
+    |--------------------------------------------------------------------------
+    | Filesystem Disks
+    |--------------------------------------------------------------------------
+    |
+    | Below you may configure as many filesystem disks as necessary, and you
+    | may even configure multiple disks for the same driver. Examples for
+    | most supported storage drivers are configured here for reference.
+    |
+    | Supported drivers: "local", "ftp", "sftp", "s3"
+    |
+    */
+
+    'disks' => [
+
+        'local' => [
+            'driver' => 'local',
+            'root' => storage_path('app/private'),
+            'serve' => true,
+            'throw' => false,
+            'report' => false,
+        ],
+
+        'public' => [
+            'driver' => 'local',
+            'root' => storage_path('app/public'),
+            'url' => rtrim(env('APP_URL', 'http://localhost'), '/').'/storage',
+            'visibility' => 'public',
+            'throw' => false,
+            'report' => false,
+        ],
+
+        's3' => [
+            'driver' => 's3',
+            'key' => env('AWS_ACCESS_KEY_ID'),
+            'secret' => env('AWS_SECRET_ACCESS_KEY'),
+            'region' => env('AWS_DEFAULT_REGION'),
+            'bucket' => env('AWS_BUCKET'),
+            'url' => env('AWS_URL'),
+            'endpoint' => env('AWS_ENDPOINT'),
+            'use_path_style_endpoint' => env('AWS_USE_PATH_STYLE_ENDPOINT', false),
+            'throw' => false,
+            'report' => false,
+        ],
+
+    ],
+
+    /*
+    |--------------------------------------------------------------------------
+    | Symbolic Links
+    |--------------------------------------------------------------------------
+    |
+    | Here you may configure the symbolic links that will be created when the
+    | `storage:link` Artisan command is executed. The array keys should be
+    | the locations of the links and the values should be their targets.
+    |
+    */
+
+    'links' => [
+        public_path('storage') => storage_path('app/public'),
+    ],
+
+];