feat(认证): 添加用户登录和注销功能

添加用户认证功能，包括登录页面、视图逻辑和模板
配置登录URL设置并保护首页视图需要认证
在导航栏添加登录状态显示和操作按钮

core/views.py

@@ -5,6 +5,9 @@ from django.db.models import Count
 from django.core.mail import send_mail, EmailMessage
 from django.conf import settings
 from django.views.decorators.csrf import csrf_exempt
+from django.contrib.auth import authenticate, login, logout
+from django.contrib.auth.decorators import login_required
+from django.contrib import messages
 from datetime import timedelta, datetime
 import os
 from loguru import logger
@@ -55,6 +58,7 @@ from .forms import (
 )
 
 # 首页视图
+@login_required
 def index(request):
     """首页"""
     logger.info("用户访问首页")
@@ -864,3 +868,39 @@ def api_submit_summary(request):
     except Exception as e:
         logger.error(f"API: 提交汇总记录失败: {str(e)}")
         return JsonResponse({'success': False, 'message': f"提交失败: {str(e)}"}, status=500)
+
+# 登录视图
+def user_login(request):
+    """用户登录"""
+    if request.user.is_authenticated:
+        logger.info(f"用户 {request.user.username} 已登录，重定向到首页")
+        return redirect('index')
+    
+    if request.method == 'POST':
+        username = request.POST.get('username')
+        password = request.POST.get('password')
+        
+        logger.info(f"用户登录尝试: {username}")
+        
+        user = authenticate(request, username=username, password=password)
+        
+        if user is not None:
+            login(request, user)
+            logger.info(f"用户 {username} 登录成功")
+            messages.success(request, '登录成功！')
+            return redirect('index')
+        else:
+            logger.warning(f"用户 {username} 登录失败: 用户名或密码错误")
+            messages.error(request, '用户名或密码错误，请重新尝试。')
+    
+    return render(request, 'core/login.html')
+
+# 注销视图
+def user_logout(request):
+    """用户注销"""
+    if request.user.is_authenticated:
+        logger.info(f"用户 {request.user.username} 注销")
+        logout(request)
+        messages.success(request, '已成功注销！')
+    
+    return redirect('login')