refactor(路由): 优化路由解析逻辑，避免重复查找

将 tasks 路由的查找结果缓存到变量中，避免在多个分支中重复执行相同的查找操作，提高代码可读性和性能。

Author: wangchunji

src/web/src/app/AppRouter.tsx

@@ -1,3 +1,10 @@
+/*
+ * @Author: wangchunji
+ * @Date: 2026-03-19 09:57:44
+ * @LastEditors: wangchunji
+ * @LastEditTime: 2026-03-25 10:54:50
+ * @Description: 
+ */
 import { Suspense, useEffect, useSyncExternalStore } from 'react';
 
 import { getCurrentAppPath, navigate, subscribeNavigation } from '@shared/navigation';

src/web/src/app/routes.tsx

@@ -78,10 +78,11 @@ export const appRoutes: AppRoute[] = [
 
 export function resolveAppRoute(pathname: string): AppRoute {
   const normalizedPath = normalizeAppPath(pathname);
+  const tasksRoute = appRoutes.find((route) => route.id === 'tasks') || appRoutes[0];
   const direct = appRoutes.find((route) => route.path === normalizedPath);
   if (direct) return direct;
   if (normalizedPath.startsWith('/tasks/')) {
-    return appRoutes.find((route) => route.id === 'tasks') || appRoutes[0];
+    return tasksRoute;
   }
-  return appRoutes[0];
+  return tasksRoute;
 }