Checkpoint: v3.0 - 新增训练视频教程库（分类浏览、自评系统）、训练提醒通知（多类型提醒、浏览器推送）、通知记录管理、去除冗余文字。65个测试全部通过。

client/src/App.tsx

@@ -17,6 +17,8 @@ import Leaderboard from "./pages/Leaderboard";
 import Checkin from "./pages/Checkin";
 import LiveCamera from "./pages/LiveCamera";
 import Recorder from "./pages/Recorder";
+import Tutorials from "./pages/Tutorials";
+import Reminders from "./pages/Reminders";
 
 function DashboardRoute({ component: Component }: { component: React.ComponentType }) {
   return (
@@ -61,6 +63,12 @@ function Router() {
       <Route path="/recorder">
         <DashboardRoute component={Recorder} />
       </Route>
+      <Route path="/tutorials">
+        <DashboardRoute component={Tutorials} />
+      </Route>
+      <Route path="/reminders">
+        <DashboardRoute component={Reminders} />
+      </Route>
       <Route path="/404" component={NotFound} />
       <Route component={NotFound} />
     </Switch>