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/pages/consultation/detail/index.tsx

@@ -32,7 +32,7 @@ export default function ConsultationDetail() {
   const [sending, setSending] = useState(false);
   const [loading, setLoading] = useState(true);
   const scrollViewRef = useRef('');
-  const pollingRef = useRef(false);
+  const pollingGeneration = useRef(0);
   const mountedRef = useRef(true);
   const messagesRef = useRef<ConsultationMessage[]>([]);
   const modeClass = useElderClass();
@@ -44,40 +44,40 @@ export default function ConsultationDetail() {
       startLongPolling();
     }
     return () => {
-      pollingRef.current = false;
+      pollingGeneration.current += 1;
       mountedRef.current = false;
     };
   }, [sessionId]);
 
   // 页面可见时恢复轮询，不可见时暂停（防止 DevTools 后台页面累积轮询）
   useDidShow(() => {
-    if (sessionId && !pollingRef.current && session?.status !== 'closed') {
+    if (sessionId && session?.status !== 'closed') {
       startLongPolling();
     }
   });
   useDidHide(() => {
-    pollingRef.current = false;
+    pollingGeneration.current += 1;
   });
 
   useEffect(() => {
     if (session?.status === 'closed') {
-      pollingRef.current = false;
+      pollingGeneration.current += 1;
     }
   }, [session?.status]);
 
   const startLongPolling = () => {
-    pollingRef.current = true;
-    longPoll();
+    const gen = ++pollingGeneration.current;
+    longPoll(gen);
   };
 
-  const longPoll = async (failCount = 0) => {
-    if (!pollingRef.current || !mountedRef.current) return;
+  const longPoll = async (gen: number, failCount = 0) => {
+    if (gen !== pollingGeneration.current || !mountedRef.current) return;
     if (failCount >= MAX_CONSECUTIVE_FAILURES) return;
     try {
       const currentMessages = messagesRef.current;
       const lastId = currentMessages.length > 0 ? currentMessages[currentMessages.length - 1].id : undefined;
       const newMsgs = await pollMessages(sessionId, lastId);
-      if (!mountedRef.current) return;
+      if (gen !== pollingGeneration.current || !mountedRef.current) return;
       if (newMsgs && newMsgs.length > 0) {
         setMessages((prev) => {
           const existing = new Set(prev.map((msg) => msg.id));
@@ -92,11 +92,11 @@ export default function ConsultationDetail() {
     } catch {
       failCount++;
     }
-    if (!pollingRef.current || !mountedRef.current) return;
+    if (gen !== pollingGeneration.current || !mountedRef.current) return;
     const delay = failCount > 0 ? Math.min(failCount * 2000, 30000) : POLL_INTERVAL_MS;
     await new Promise((r) => setTimeout(r, delay));
-    if (pollingRef.current && mountedRef.current) {
-      longPoll(failCount);
+    if (gen === pollingGeneration.current && mountedRef.current) {
+      longPoll(gen, failCount);
     }
   };
 
@@ -112,7 +112,6 @@ export default function ConsultationDetail() {
       setMessages(msgs);
       messagesRef.current = msgs;
       scrollViewRef.current = `msg-${msgs.length}`;
-      if (s.status === 'closed') pollingRef.current = false;
     } catch {
       Taro.showToast({ title: '加载失败', icon: 'none' });
     } finally {