feat(frontend): polish login and design tokens

core/frontend/src/App.tsx

@@ -384,14 +384,16 @@ export function App() {
     }, "图片已生成");
   }
 
-  function onAuthed(payload: { token: string; user: User; team: Team }) {
+  async function onAuthed(payload: { token: string; user: User; team: Team }) {
     setToken(payload.token);
     setUser(payload.user);
     setTeam(payload.team);
+    setBooting(false);
     setAuthed(true);
-    setBooting(true);
-    loadData().finally(() => setBooting(false));
     navigate("dashboard", { replace: true });
+    void loadData().catch((error) => {
+      console.error("[login] data hydrate failed:", error);
+    });
   }
 
   async function logout() {
@@ -411,7 +413,7 @@ export function App() {
         initialMode={authMode}
         onModeChange={(next) => {
           setAuthMode(next);
-          window.history.pushState(null, "", next === "register" ? "/register" : "/login");
+          window.history.pushState(null, "", "/login");
         }}
         onAuthed={onAuthed}
       />