fix(mp): 患者端卡死深度审查修复 — CRITICAL 回归 + 并发保护 + 页栈溢出防护

CRITICAL:
- 咨询详情页 loadData 引用已删除的 pollingRef → 移除残余引用

HIGH:
- 401 重试递归改循环结构，避免并发限制器双 slot 占用
- 医生端 4 个列表页添加 loadingRef 防重入（consultation/alerts/dialysis/prescription）
- 新增 safeNavigateTo 页栈溢出保护（栈≥9 自动 redirectTo）

前期修复一并提交:
- 全局并发限制 MAX_CONCURRENT=8
- doRefresh 失败时完整清理 Storage + 重置缓存状态
- 401 跳转登录页修正
- 长轮询 generation counter 模式
- 首页/健康页 loadingRef + refreshToday 去重

apps/miniprogram/src/stores/health.ts

@@ -21,6 +21,8 @@ const CACHE_TTL = 5 * 60 * 1000;
 const TODAY_SUMMARY_TTL = 60_000;
 const MAX_TREND_KEYS = 20;
 
+let refreshingToday = false;
+
 export const useHealthStore = create<HealthState>((set, get) => ({
   todaySummary: null,
   todaySummaryFetchedAt: 0,
@@ -28,10 +30,12 @@ export const useHealthStore = create<HealthState>((set, get) => ({
   loading: false,
 
   refreshToday: async (force = false) => {
+    if (refreshingToday) return;
     const state = get();
     if (!force && state.todaySummary && Date.now() - state.todaySummaryFetchedAt < TODAY_SUMMARY_TTL) {
       return;
     }
+    refreshingToday = true;
     set({ loading: true });
     try {
       const patientId = Taro.getStorageSync('current_patient_id') || undefined;
@@ -39,6 +43,8 @@ export const useHealthStore = create<HealthState>((set, get) => ({
       set({ todaySummary: data, todaySummaryFetchedAt: Date.now(), loading: false });
     } catch {
       set({ loading: false });
+    } finally {
+      refreshingToday = false;
     }
   },