fix(mp): Phase 0 基础设施修复 — secureGet 解密 + Storage 一致性

- secureGet: 移除错误的 startsWith 条件，始终尝试 XOR 解密
- request.ts: current_patient_id 读取改用 safeGet，清理改用 secureRemove
- health.ts: getTodaySummary 使用 getCachedPatientId 替代直接 Storage
- auth.ts: analytics_queue 清理改用明文 Taro.removeStorageSync

apps/miniprogram/src/stores/auth.ts

@@ -263,7 +263,8 @@ export const useAuthStore = create<AuthState>((set, get) => ({
     secureRemove('wechat_openid');
     secureRemove('current_patient');
     secureRemove('current_patient_id');
-    secureRemove('analytics_queue');
+    // analytics_queue 使用明文存储（analytics.ts STORAGE_KEY = 'analytics_queue'）
+    Taro.removeStorageSync('analytics_queue');
     secureRemove('edit_patient');
     secureRemove('ai_chat_history');
     // 清理 BLE DataBuffer 缓存（key 格式：ble_buffer_{patientId}_{bucket}）