fix(mp): P1+P2 稳定性加固 — 导航安全+生产日志+分包预加载+logout清理

P1:
- 全局 23 个页面 Taro.navigateTo → safeNavigateTo，防止页栈超10层
- 生产构建保留 console.warn/error，便于线上问题排查
- 添加 preloadRule 分包预加载（首页预加载健康/医生/文章分包）

P2:
- logout 时清理 ai_chat_history + BLE DataBuffer 缓存
- restore() 移除冗余的双重 Storage 读取（secureGet 已包含 getStorageSync）
- 首页文章图片添加 lazyLoad

apps/miniprogram/src/stores/auth.ts

@@ -81,12 +81,12 @@ export const useAuthStore = create<AuthState>((set, get) => ({
   restore: () => {
     // 利用内存缓存避免重复 Storage IPC + JSON.parse
     try {
-      const userData = secureGet('user_data') || Taro.getStorageSync('user_data') || '';
+      const userData = secureGet('user_data');
       if (userData !== cachedUserJson) {
         cachedUserJson = userData;
         cachedUserObj = userData ? JSON.parse(userData) : null;
       }
-      const rolesData = secureGet('user_roles') || Taro.getStorageSync('user_roles') || '';
+      const rolesData = secureGet('user_roles');
       if (rolesData !== cachedRolesJson) {
         cachedRolesJson = rolesData;
         cachedRolesObj = rolesData ? JSON.parse(rolesData) : [];
@@ -252,6 +252,14 @@ export const useAuthStore = create<AuthState>((set, get) => ({
     Taro.removeStorageSync('current_patient_id');
     Taro.removeStorageSync('analytics_queue');
     Taro.removeStorageSync('edit_patient');
+    Taro.removeStorageSync('ai_chat_history');
+    // 清理 BLE DataBuffer 缓存（key 格式：ble_buffer_{patientId}_{bucket}）
+    const storageInfo = Taro.getStorageInfoSync();
+    storageInfo.keys.forEach((key) => {
+      if (key.startsWith('ble_buffer_') || key.startsWith('last_ble_sync')) {
+        Taro.removeStorageSync(key);
+      }
+    });
     resetAllStores();
     set({ user: null, roles: [], currentPatient: null, patients: [] });
     Taro.reLaunch({ url: '/pages/index/index' });