fix(mp): 五专家组审查 HIGH 级问题修复 — 9 项

- S-1: 隐私政策描述修正（"混淆加密" → "HTTPS + 微信沙箱"）
- A-1: getCachedPatientId 统一导出 + 9 处 Storage 直读替换
- A-2: usePageData loading 改为 useState 响应式
- A-3: health.ts refreshingToday 移入 store state
- M-2: prod config 移除 console.error/warn
- M-4: clearCache 后同步刷新 request.ts 内存缓存
- Q-3: doctor/appointment.ts any[] → Appointment 类型
- Q-4: daily-monitoring 常量提取到 constants.ts
- 清理: 删除空目录 FamilyPicker/HealthCard + 未使用组件 DeviceCard

apps/miniprogram/src/services/request.ts

@@ -307,6 +307,10 @@ export function setCachedPatientId(id: string): void {
   responseCache.setPatientId(id);
 }
 
+export function getCachedPatientId(): string {
+  return responseCache.getPatientId();
+}
+
 export function clearRequestCache(prefix?: string): void {
   responseCache.clear(prefix);
 }