feat: 添加日记系统

- 完整的 Django 后端 (diary app)
- 前端页面
- 部署脚本 (本地 + 云端)
- Nginx 配置
- 数据迁移工具
- 同步工具

diary-system/backend/diary/views.py

@@ -0,0 +1,62 @@
+from rest_framework import viewsets
+from rest_framework.decorators import action
+from rest_framework.response import Response
+from django.utils import timezone
+from .models import DiaryEntry, DailyProgress, Experience
+from .serializers import DiaryEntrySerializer, DailyProgressSerializer, ExperienceSerializer
+
+class DiaryEntryViewSet(viewsets.ModelViewSet):
+    queryset = DiaryEntry.objects.all()
+    serializer_class = DiaryEntrySerializer
+
+    @action(detail=False, methods=['get'])
+    def today(self, request):
+        """获取今天的日记"""
+        today = timezone.now().date()
+        entry, created = DiaryEntry.objects.get_or_create(date=today)
+        serializer = self.get_serializer(entry)
+        return Response(serializer.data)
+
+    @action(detail=False, methods=['get'])
+    def recent(self, request):
+        """获取最近 7 天的日记"""
+        entries = DiaryEntry.objects.order_by('-date')[:7]
+        serializer = self.get_serializer(entries, many=True)
+        return Response(serializer.data)
+
+    @action(detail=False, methods=['get'])
+    def stats(self, request):
+        """获取统计信息"""
+        total_entries = DiaryEntry.objects.count()
+        return Response({
+            'total_entries': total_entries,
+            'first_entry': DiaryEntry.objects.order_by('date').first().date if total_entries > 0 else None,
+            'latest_entry': DiaryEntry.objects.order_by('-date').first().date if total_entries > 0 else None,
+        })
+
+class DailyProgressViewSet(viewsets.ModelViewSet):
+    queryset = DailyProgress.objects.all()
+    serializer_class = DailyProgressSerializer
+
+
+class ExperienceViewSet(viewsets.ModelViewSet):
+    queryset = Experience.objects.all()
+    serializer_class = ExperienceSerializer
+
+    @action(detail=False, methods=['get'])
+    def by_category(self, request):
+        """按类别分组获取经验"""
+        categories = {}
+        for exp in Experience.objects.all():
+            cat = exp.get_category_display()
+            if cat not in categories:
+                categories[cat] = []
+            categories[cat].append(ExperienceSerializer(exp).data)
+        return Response(categories)
+
+    @action(detail=False, methods=['get'])
+    def recent(self, request):
+        """获取最近 10 条经验"""
+        experiences = Experience.objects.order_by('-date', '-created_at')[:10]
+        serializer = self.get_serializer(experiences, many=True)
+        return Response(serializer.data)