feat: Phase 1-3 全部完成 — 沙盒增强、学情分析、学习路径

frontend/src/lib/auth-context.tsx

@@ -0,0 +1,49 @@
+'use client';
+
+import { createContext, useContext, useState, useEffect, useCallback, type ReactNode } from 'react';
+
+interface AuthContextType {
+  isLoggedIn: boolean;
+  initialized: boolean;
+  login: (token: string, refreshToken?: string) => void;
+  logout: () => void;
+}
+
+const AuthContext = createContext<AuthContextType>({
+  isLoggedIn: false,
+  initialized: false,
+  login: () => {},
+  logout: () => {},
+});
+
+export function AuthProvider({ children }: { children: ReactNode }) {
+  const [isLoggedIn, setIsLoggedIn] = useState(false);
+  const [initialized, setInitialized] = useState(false);
+
+  useEffect(() => {
+    setIsLoggedIn(!!localStorage.getItem('token'));
+    setInitialized(true);
+  }, []);
+
+  const login = useCallback((token: string, refreshTk?: string) => {
+    localStorage.setItem('token', token);
+    if (refreshTk) localStorage.setItem('refreshToken', refreshTk);
+    setIsLoggedIn(true);
+  }, []);
+
+  const logout = useCallback(() => {
+    localStorage.removeItem('token');
+    localStorage.removeItem('refreshToken');
+    setIsLoggedIn(false);
+  }, []);
+
+  return (
+      <AuthContext.Provider value={{ isLoggedIn, initialized, login, logout }}>
+      {children}
+    </AuthContext.Provider>
+  );
+}
+
+export function useAuth() {
+  return useContext(AuthContext);
+}