chore: 初始化uniapp前端项目基础框架

新增项目配置、静态资源、工具类、状态管理、API接口、组件库集成等全套基础代码，完成项目初始化搭建

frontend/app/src/constants/index.ts

@@ -0,0 +1,6 @@
+/**
+ * 常量统一导出
+ */
+
+// 存储相关常量
+export * from './storage.constant'

frontend/app/src/constants/storage.constant.ts

@@ -0,0 +1,51 @@
+/**
+ * 存储键名常量
+ *
+ * @description
+ * 统一管理所有 uni.storage 的键名，与 web 端保持一致
+ * 命名规则：{分类}_{具体名称}（snake_case）
+ */
+
+// 🔐 用户认证相关
+export const ACCESS_TOKEN_KEY = 'access_token'
+export const REFRESH_TOKEN_KEY = 'refresh_token'
+export const REMEMBER_ME_KEY = 'remember_me'
+
+// 👤 用户数据相关
+export const USER_INFO_KEY = 'user_info'
+
+// 📊 数据缓存相关
+export const DICT_CACHE_KEY = 'dict_cache'
+
+// 🎨 系统设置相关
+export const THEME_KEY = 'theme'
+export const THEME_COLOR_KEY = 'themeColor'
+
+// 🎯 角色常量
+export const ROLE_ROOT = 'ADMIN'
+
+// 📌 认证相关键集合
+export const AUTH_KEYS = {
+  ACCESS_TOKEN: ACCESS_TOKEN_KEY,
+  REFRESH_TOKEN: REFRESH_TOKEN_KEY,
+  REMEMBER_ME: REMEMBER_ME_KEY,
+} as const
+
+// 📦 缓存相关键集合
+export const CACHE_KEYS = {
+  DICT_CACHE: DICT_CACHE_KEY,
+  USER_INFO: USER_INFO_KEY,
+} as const
+
+// 🎨 设置相关键集合
+export const SETTINGS_KEYS = {
+  THEME: THEME_KEY,
+  THEME_COLOR: THEME_COLOR_KEY,
+} as const
+
+// 📦 所有存储键的统一集合
+export const ALL_STORAGE_KEYS = {
+  ...AUTH_KEYS,
+  ...CACHE_KEYS,
+  ...SETTINGS_KEYS,
+} as const