perf(mp): 缓存优化 — restore 条件清理 + LRU + 差异化 TTL

- auth store: clearRequestCache 仅在 user/roles/patient 变更时调用
- ResponseCache: get() 命中时 delete+set 更新 Map 顺序（真 LRU）
- 告警 API 缓存 TTL 10s，通知未读数 TTL 10s，其余保持 60s 默认

apps/miniprogram/src/services/alert.ts

@@ -22,5 +22,5 @@ export async function listPatientAlerts(patientId: string, params?: { status?: s
     page: params?.page ?? 1,
     page_size: params?.page_size ?? 20,
     status: params?.status,
-  });
+  }, 10_000);
 }

apps/miniprogram/src/services/notification.ts

@@ -8,5 +8,5 @@ export const notificationService = {
   markAllRead: () =>
     api.put('/messages/read-all'),
   getUnreadCount: () =>
-    api.get('/messages/unread-count'),
+    api.get('/messages/unread-count', undefined, 10_000),
 };

apps/miniprogram/src/services/request/cache.ts

@@ -28,9 +28,17 @@ export class ResponseCache {
   }
 
   get<T>(url: string): T | null {
-    const entry = this.cache.get(this.cacheKey(url));
-    if (entry && Date.now() < entry.expiry) return entry.data as T;
-    return null;
+    const key = this.cacheKey(url);
+    const entry = this.cache.get(key);
+    if (!entry) return null;
+    if (Date.now() >= entry.expiry) {
+      this.cache.delete(key);
+      return null;
+    }
+    // LRU: 命中时更新插入顺序，使该条目移到末尾
+    this.cache.delete(key);
+    this.cache.set(key, entry);
+    return entry.data as T;
   }
 
   getInflight<T>(url: string): Promise<T> | null {

apps/miniprogram/src/stores/auth.ts

@@ -109,9 +109,6 @@ export const useAuthStore = create<AuthState>((set, get) => ({
       setCachedPatientId(currentPatient.id);
     }
 
-    // 状态有变化时清理请求缓存，避免返回过期数据
-    clearRequestCache();
-
     // 跳过未变更的 set()
     const cur = get();
     const userChanged = cur.user?.id !== user?.id;
@@ -119,6 +116,8 @@ export const useAuthStore = create<AuthState>((set, get) => ({
     const patientChanged = cur.currentPatient?.id !== currentPatient?.id;
     if (!userChanged && !rolesChanged && !patientChanged) return;
 
+    // 状态有变化时清理请求缓存，避免返回过期数据
+    clearRequestCache();
     set({ user, roles, currentPatient });
   },