refactor: 重构项目结构 - enums/config/types/plugins

- 重构 enums: 按业务域合并为 5 个文件
- 创建 config: storage.ts, vxe-table.ts
- 删除 plugins，功能迁移到 main.ts
- 创建完整 types 结构
- 新增 utils: validators, websocket, register-components
- 创建 router/guards/permission.ts
- 更新配置文件

types/env.d.ts

@@ -0,0 +1,29 @@
+/// <reference types="vite/client" />
+
+/**
+ * Vite 环境变量类型定义
+ */
+interface ImportMetaEnv {
+  readonly VITE_APP_PORT: number;
+  readonly VITE_APP_NAME: string;
+  readonly VITE_APP_BASE_API: string;
+  readonly VITE_APP_API_URL: string;
+  readonly VITE_MOCK_DEV_SERVER: boolean;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}
+
+declare const __APP_INFO__: {
+  pkg: {
+    name: string;
+    version: string;
+    engines: {
+      node: string;
+    };
+    dependencies: Record<string, string>;
+    devDependencies: Record<string, string>;
+  };
+  buildTimestamp: number;
+};