refactor: 全量代码优化与品牌视觉统一

- 移除冗余的引导页逻辑与代码
- 优化多处代码写法：简化箭头函数、清理无用注释、修复类型兼容问题
- 统一暗色模式全局样式与用户信息卡视觉风格
- 完善小程序配置与水印开关容错处理
- 更新自动导入类型声明

frontend/app/src/composables/useShare.ts

@@ -41,10 +41,8 @@ export function useShare(configOrGetter?: ShareConfig | (() => ShareConfig)) {
     return { ...DEFAULT_SHARE }
   }
 
-  onShareAppMessage((options) => {
+  onShareAppMessage(() => {
     const cfg = getConfig()
-    // 从分享来源判断：如果是按钮分享，可携带额外参数
-    const fromButton = options?.from === 'button'
     return {
       title: cfg.title,
       path: cfg.path || DEFAULT_SHARE.path,

frontend/app/src/composables/useSharePoster.ts

@@ -220,7 +220,7 @@ export function useSharePoster() {
               height: H,
               destWidth: W * 2,
               destHeight: H * 2,
-              success: (res) => resolve(res.tempFilePath),
+              success: res => resolve(res.tempFilePath),
               fail: () => resolve(''),
             })
           }, 200)

frontend/app/src/composables/useSubscribeMessage.ts

@@ -107,7 +107,7 @@ export function useSubscribeMessage() {
     // #ifdef MP-WEIXIN
     try {
       const settings = await uni.getSetting({})
-      const subscription = (settings as any).authSetting?.['subscribeMessage']
+      const subscription = (settings as any).authSetting?.subscribeMessage
       // 如果用户曾经拒绝过，引导去设置页开启
       if (subscription === false) {
         uni.showModal({