feat: 添加登录注册功能

- 新增登录页面 (Login.jsx) 和注册页面 (Register.jsx)
- 实现 JWT 认证，支持登录/注册/登出
- 登录后导航栏显示用户名和登出按钮
- 修复 API 路径重复问题 (/api/api/ → /api/)
- 优化登录/注册页面 UI 设计

city-manual/frontend/src/App.css

@@ -1,3 +1,109 @@
+/* Navigation Bar */
+.navbar {
+  background: white;
+  border-bottom: 1px solid var(--border);
+  padding: 16px 0;
+  position: sticky;
+  top: 0;
+  z-index: 100;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
+}
+
+.navbar .container {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 20px;
+}
+
+.logo {
+  font-size: 24px;
+  font-weight: 700;
+  color: var(--text-h);
+  text-decoration: none;
+  transition: opacity 0.2s;
+
+  &:hover {
+    opacity: 0.8;
+  }
+}
+
+.nav-links {
+  display: flex;
+  align-items: center;
+  gap: 24px;
+}
+
+.nav-links a {
+  color: var(--text);
+  text-decoration: none;
+  font-weight: 500;
+  transition: color 0.2s;
+
+  &:hover {
+    color: var(--accent);
+  }
+}
+
+.btn-login {
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  color: white !important;
+  padding: 10px 20px;
+  border-radius: 8px;
+  font-weight: 600;
+  transition: transform 0.2s, box-shadow 0.2s;
+
+  &:hover {
+    transform: translateY(-2px);
+    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
+  }
+}
+
+.user-menu {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+}
+
+.username {
+  color: var(--text);
+  font-weight: 500;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.btn-logout {
+  background: #f5f5f5;
+  color: var(--text);
+  border: none;
+  padding: 10px 20px;
+  border-radius: 8px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: all 0.2s;
+
+  &:hover {
+    background: #e5e5e5;
+    color: var(--text-h);
+  }
+}
+
+@media (max-width: 768px) {
+  .nav-links {
+    gap: 16px;
+    font-size: 14px;
+  }
+
+  .btn-login,
+  .btn-logout {
+    padding: 8px 16px;
+    font-size: 14px;
+  }
+}
+
 .counter {
   font-size: 16px;
   padding: 5px 10px;

city-manual/frontend/src/App.jsx

@@ -1,10 +1,45 @@
-import { BrowserRouter as Router, Routes, Route, Link } from 'react-router-dom';
+import { useState, useEffect } from 'react';
+import { BrowserRouter as Router, Routes, Route, Link, useNavigate } from 'react-router-dom';
 import Home from './pages/Home';
 import Cities from './pages/Cities';
 import RegionDetail from './pages/RegionDetail';
+import Login from './pages/Login';
+import Register from './pages/Register';
+import api from './api';
 import './App.css';
 
 function App() {
+  const [isLoggedIn, setIsLoggedIn] = useState(false);
+  const [username, setUsername] = useState('');
+
+  useEffect(() => {
+    checkAuth();
+  }, []);
+
+  const checkAuth = async () => {
+    const token = localStorage.getItem('access_token');
+    if (token) {
+      try {
+        const response = await api.get('/users/me/');
+        setIsLoggedIn(true);
+        setUsername(response.data.username);
+      } catch (error) {
+        localStorage.removeItem('access_token');
+        localStorage.removeItem('refresh_token');
+        setIsLoggedIn(false);
+        setUsername('');
+      }
+    }
+  };
+
+  const handleLogout = () => {
+    localStorage.removeItem('access_token');
+    localStorage.removeItem('refresh_token');
+    setIsLoggedIn(false);
+    setUsername('');
+    window.location.href = '/';
+  };
+
   return (
     <Router>
       <div className="app">
@@ -18,7 +53,14 @@ function App() {
               <Link to="/cities">城市</Link>
               <Link to="/articles">文章</Link>
               <Link to="/services">服务</Link>
-              <Link to="/login" className="btn-login">登录</Link>
+              {isLoggedIn ? (
+                <div className="user-menu">
+                  <span className="username">👤 {username}</span>
+                  <button onClick={handleLogout} className="btn-logout">登出</button>
+                </div>
+              ) : (
+                <Link to="/login" className="btn-login">登录</Link>
+              )}
             </div>
           </div>
         </nav>
@@ -32,8 +74,8 @@ function App() {
             <Route path="/region/:id" element={<RegionDetail />} />
             <Route path="/article/:id" element={<ArticleDetail />} />
             <Route path="/service/:id" element={<ServiceDetail />} />
-            <Route path="/login" element={<Login />} />
+            <Route path="/login" element={<Login onLogin={checkAuth} />} />
-            <Route path="/register" element={<Register />} />
+            <Route path="/register" element={<Register onLogin={checkAuth} />} />
           </Routes>
         </main>
 
@@ -57,12 +99,4 @@ function ServiceDetail() {
   return <div className="container" style={{ padding: '40px 20px' }}><h1>服务详情页</h1><p>开发中...</p></div>;
 }
 
-function Login() {
-  return <div className="container" style={{ padding: '40px 20px' }}><h1>登录</h1><p>开发中...</p></div>;
-}
-
-function Register() {
-  return <div className="container" style={{ padding: '40px 20px' }}><h1>注册</h1><p>开发中...</p></div>;
-}
-
 export default App;

city-manual/frontend/src/api.js

@@ -1,6 +1,6 @@
 import axios from 'axios';
 
-const API_BASE = 'http://localhost:8000/api';
+const API_BASE = '/api';
 
 const api = axios.create({
   baseURL: API_BASE,

city-manual/frontend/src/pages/Login.css

@@ -0,0 +1,133 @@
+.login-page {
+  min-height: calc(100vh - 200px);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  padding: 40px 20px;
+}
+
+.login-container {
+  width: 100%;
+  max-width: 420px;
+}
+
+.login-box {
+  background: white;
+  border-radius: 16px;
+  padding: 40px;
+  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
+}
+
+.login-title {
+  text-align: center;
+  color: #333;
+  margin-bottom: 8px;
+  font-size: 28px;
+}
+
+.login-subtitle {
+  text-align: center;
+  color: #666;
+  margin-bottom: 32px;
+  font-size: 14px;
+}
+
+.error-message {
+  background: #fee;
+  color: #c33;
+  padding: 12px 16px;
+  border-radius: 8px;
+  margin-bottom: 24px;
+  font-size: 14px;
+  border-left: 3px solid #c33;
+}
+
+.login-form {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+
+.form-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.form-group label {
+  font-weight: 600;
+  color: #444;
+  font-size: 14px;
+}
+
+.form-group input {
+  padding: 12px 16px;
+  border: 2px solid #e0e0e0;
+  border-radius: 8px;
+  font-size: 16px;
+  transition: border-color 0.2s;
+}
+
+.form-group input:focus {
+  outline: none;
+  border-color: #667eea;
+}
+
+.form-group input:disabled {
+  background: #f5f5f5;
+  cursor: not-allowed;
+}
+
+.login-btn {
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  color: white;
+  border: none;
+  padding: 14px;
+  border-radius: 8px;
+  font-size: 16px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: transform 0.2s, box-shadow 0.2s;
+  margin-top: 8px;
+}
+
+.login-btn:hover:not(:disabled) {
+  transform: translateY(-2px);
+  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
+}
+
+.login-btn:active:not(:disabled) {
+  transform: translateY(0);
+}
+
+.login-btn:disabled {
+  opacity: 0.7;
+  cursor: not-allowed;
+}
+
+.login-footer {
+  margin-top: 32px;
+  text-align: center;
+  color: #666;
+  font-size: 14px;
+}
+
+.login-footer a {
+  color: #667eea;
+  text-decoration: none;
+  font-weight: 600;
+}
+
+.login-footer a:hover {
+  text-decoration: underline;
+}
+
+.demo-hint {
+  margin-top: 16px;
+  padding: 12px;
+  background: #f0f4ff;
+  border-radius: 8px;
+  color: #667eea;
+  font-size: 13px;
+}

city-manual/frontend/src/pages/Login.jsx

@@ -0,0 +1,87 @@
+import { useState } from 'react';
+import { useNavigate, Link } from 'react-router-dom';
+import api from '../api';
+import './Login.css';
+
+function Login() {
+  const [username, setUsername] = useState('');
+  const [password, setPassword] = useState('');
+  const [error, setError] = useState('');
+  const [loading, setLoading] = useState(false);
+  const navigate = useNavigate();
+
+  const handleSubmit = async (e) => {
+    e.preventDefault();
+    setError('');
+    setLoading(true);
+
+    try {
+      const response = await api.post('/token/', {
+        username,
+        password
+      });
+
+      if (response.data.access) {
+        localStorage.setItem('access_token', response.data.access);
+        localStorage.setItem('refresh_token', response.data.refresh);
+        navigate('/');
+      }
+    } catch (err) {
+      setError(err.response?.data?.detail || '登录失败，请检查用户名和密码');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="login-page">
+      <div className="login-container">
+        <div className="login-box">
+          <h1 className="login-title">📖 登录城市手册</h1>
+          <p className="login-subtitle">记录每座城市的独特魅力</p>
+
+          {error && <div className="error-message">{error}</div>}
+
+          <form onSubmit={handleSubmit} className="login-form">
+            <div className="form-group">
+              <label htmlFor="username">用户名</label>
+              <input
+                type="text"
+                id="username"
+                value={username}
+                onChange={(e) => setUsername(e.target.value)}
+                placeholder="请输入用户名"
+                required
+                disabled={loading}
+              />
+            </div>
+
+            <div className="form-group">
+              <label htmlFor="password">密码</label>
+              <input
+                type="password"
+                id="password"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                placeholder="请输入密码"
+                required
+                disabled={loading}
+              />
+            </div>
+
+            <button type="submit" className="login-btn" disabled={loading}>
+              {loading ? '登录中...' : '登录'}
+            </button>
+          </form>
+
+          <div className="login-footer">
+            <p>还没有账号？<Link to="/register">立即注册</Link></p>
+            <p className="demo-hint">💡 测试账号：demo / demo123</p>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default Login;

city-manual/frontend/src/pages/Register.css

@@ -0,0 +1,124 @@
+.register-page {
+  min-height: calc(100vh - 200px);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  padding: 40px 20px;
+}
+
+.register-container {
+  width: 100%;
+  max-width: 420px;
+}
+
+.register-box {
+  background: white;
+  border-radius: 16px;
+  padding: 40px;
+  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
+}
+
+.register-title {
+  text-align: center;
+  color: #333;
+  margin-bottom: 8px;
+  font-size: 28px;
+}
+
+.register-subtitle {
+  text-align: center;
+  color: #666;
+  margin-bottom: 32px;
+  font-size: 14px;
+}
+
+.error-message {
+  background: #fee;
+  color: #c33;
+  padding: 12px 16px;
+  border-radius: 8px;
+  margin-bottom: 24px;
+  font-size: 14px;
+  border-left: 3px solid #c33;
+}
+
+.register-form {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+
+.form-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.form-group label {
+  font-weight: 600;
+  color: #444;
+  font-size: 14px;
+}
+
+.form-group input {
+  padding: 12px 16px;
+  border: 2px solid #e0e0e0;
+  border-radius: 8px;
+  font-size: 16px;
+  transition: border-color 0.2s;
+}
+
+.form-group input:focus {
+  outline: none;
+  border-color: #667eea;
+}
+
+.form-group input:disabled {
+  background: #f5f5f5;
+  cursor: not-allowed;
+}
+
+.register-btn {
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  color: white;
+  border: none;
+  padding: 14px;
+  border-radius: 8px;
+  font-size: 16px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: transform 0.2s, box-shadow 0.2s;
+  margin-top: 8px;
+}
+
+.register-btn:hover:not(:disabled) {
+  transform: translateY(-2px);
+  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
+}
+
+.register-btn:active:not(:disabled) {
+  transform: translateY(0);
+}
+
+.register-btn:disabled {
+  opacity: 0.7;
+  cursor: not-allowed;
+}
+
+.register-footer {
+  margin-top: 32px;
+  text-align: center;
+  color: #666;
+  font-size: 14px;
+}
+
+.register-footer a {
+  color: #667eea;
+  text-decoration: none;
+  font-weight: 600;
+}
+
+.register-footer a:hover {
+  text-decoration: underline;
+}

city-manual/frontend/src/pages/Register.jsx

@@ -0,0 +1,141 @@
+import { useState } from 'react';
+import { useNavigate, Link } from 'react-router-dom';
+import api from '../api';
+import './Register.css';
+
+function Register() {
+  const [username, setUsername] = useState('');
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [confirmPassword, setConfirmPassword] = useState('');
+  const [error, setError] = useState('');
+  const [loading, setLoading] = useState(false);
+  const navigate = useNavigate();
+
+  const handleSubmit = async (e) => {
+    e.preventDefault();
+    setError('');
+
+    if (password !== confirmPassword) {
+      setError('两次输入的密码不一致');
+      return;
+    }
+
+    if (password.length < 6) {
+      setError('密码长度至少为 6 位');
+      return;
+    }
+
+    setLoading(true);
+
+    try {
+      await api.post('/register/', {
+        username,
+        email,
+        password
+      });
+
+      // 注册成功后自动登录
+      const loginResponse = await api.post('/token/', {
+        username,
+        password
+      });
+
+      if (loginResponse.data.access) {
+        localStorage.setItem('access_token', loginResponse.data.access);
+        localStorage.setItem('refresh_token', loginResponse.data.refresh);
+        navigate('/');
+      }
+    } catch (err) {
+      const errorMsg = err.response?.data;
+      if (errorMsg?.username) {
+        setError('用户名：' + (Array.isArray(errorMsg.username) ? errorMsg.username[0] : errorMsg.username));
+      } else if (errorMsg?.email) {
+        setError('邮箱：' + (Array.isArray(errorMsg.email) ? errorMsg.email[0] : errorMsg.email));
+      } else if (errorMsg?.password) {
+        setError('密码：' + (Array.isArray(errorMsg.password) ? errorMsg.password[0] : errorMsg.password));
+      } else {
+        setError('注册失败，请稍后重试');
+      }
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="register-page">
+      <div className="register-container">
+        <div className="register-box">
+          <h1 className="register-title">📖 注册城市手册</h1>
+          <p className="register-subtitle">加入我们，记录每座城市的独特魅力</p>
+
+          {error && <div className="error-message">{error}</div>}
+
+          <form onSubmit={handleSubmit} className="register-form">
+            <div className="form-group">
+              <label htmlFor="username">用户名</label>
+              <input
+                type="text"
+                id="username"
+                value={username}
+                onChange={(e) => setUsername(e.target.value)}
+                placeholder="请输入用户名"
+                required
+                disabled={loading}
+              />
+            </div>
+
+            <div className="form-group">
+              <label htmlFor="email">邮箱</label>
+              <input
+                type="email"
+                id="email"
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                placeholder="请输入邮箱"
+                required
+                disabled={loading}
+              />
+            </div>
+
+            <div className="form-group">
+              <label htmlFor="password">密码</label>
+              <input
+                type="password"
+                id="password"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                placeholder="请输入密码（至少 6 位）"
+                required
+                disabled={loading}
+              />
+            </div>
+
+            <div className="form-group">
+              <label htmlFor="confirmPassword">确认密码</label>
+              <input
+                type="password"
+                id="confirmPassword"
+                value={confirmPassword}
+                onChange={(e) => setConfirmPassword(e.target.value)}
+                placeholder="请再次输入密码"
+                required
+                disabled={loading}
+              />
+            </div>
+
+            <button type="submit" className="register-btn" disabled={loading}>
+              {loading ? '注册中...' : '注册'}
+            </button>
+          </form>
+
+          <div className="register-footer">
+            <p>已有账号？<Link to="/login">立即登录</Link></p>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default Register;