完善前端项目结构和依赖配置

- 更新 package.json 中的依赖版本号，包括 element-plus、axios、pinia、vue-router 等
- 删除 HelloWorld 组件，替换为 router-view 以支持路由功能
- 添加 auth、category、customer、dashboard、medicine、role、stock、stockIn、stockOut、
  supplier、user 等多个 API 接口文件
- 创建权限指令、主布局组件和全局样式
- 集成 Element Plus UI 框架并注册图标组件
- 实现应用状态管理和用户状态管理 Store
- 配置 Vue Router 路由系统，支持动态菜单路由生成
- 移除旧的 CSS 样式文件，改用 SCSS 全局样式
```

frontend/package-lock.json

@@ -8,16 +8,16 @@
       "name": "frontend",
       "version": "0.0.0",
       "dependencies": {
-        "@element-plus/icons-vue": "^2.x",
-        "axios": "^1.x",
-        "element-plus": "^2.x",
-        "pinia": "^2.x",
+        "@element-plus/icons-vue": "^2.3.2",
+        "axios": "^1.18.1",
+        "element-plus": "^2.14.2",
+        "pinia": "^2.3.1",
         "vue": "^3.5.39",
-        "vue-router": "^4.x"
+        "vue-router": "^4.6.4"
       },
       "devDependencies": {
         "@vitejs/plugin-vue": "^6.0.7",
-        "sass": "^1.x",
+        "sass": "^1.101.0",
         "vite": "^8.1.1"
       }
     },
@@ -700,6 +700,29 @@
         "node": "^20.19.0 || >=22.12.0"
       }
     },
+    "node_modules/@rolldown/binding-wasm32-wasi/node_modules/@emnapi/core": {
+      "version": "1.11.1",
+      "resolved": "https://registry.npmmirror.com/@emnapi/core/-/core-1.11.1.tgz",
+      "integrity": "sha512-RSvbQmHzdKzNsLYa/wHrbc3KN4sYLKAdPZxqiM2HATqv/SBk2/ENSHpvXGaLOMcsAyz0poEGqkmmKYG3OWiJEQ==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.2",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@rolldown/binding-wasm32-wasi/node_modules/@emnapi/runtime": {
+      "version": "1.11.1",
+      "resolved": "https://registry.npmmirror.com/@emnapi/runtime/-/runtime-1.11.1.tgz",
+      "integrity": "sha512-vgj7R3y3Wgx24IQaGPA/R6YFXLHVMOZ0uVEyIQPaWs+rd1AzfEMXlAC22FYwO1XkKR6NPsq7mUandH8oIRdZFw==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@rolldown/binding-win32-arm64-msvc": {
       "version": "1.1.4",
       "resolved": "https://registry.npmmirror.com/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.1.4.tgz",
@@ -1755,7 +1778,6 @@
       "integrity": "sha512-RvwwcruNjI1ncT5xRakeyS9Lf8lcItv34KD+aif+VH9kduAyfYBipGh12274xtenIPZ119/R9BdTBa8gAwSh0A==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=12"
       },