Implement Django backend and Vue frontend structure

- Django backend with projects, templates, exports apps
- SQLite database models for Project, Asset, CardLayer
- REST API endpoints for project management
- Vue frontend with Vite, Element Plus, Fabric.js
- Home page for project selection
- Editor page with Fabric.js canvas integration

backend/apps/projects/views.py

@@ -0,0 +1,45 @@
+from rest_framework.decorators import api_view
+from rest_framework.response import Response
+from rest_framework import status
+from .models import Project
+from .serializers import ProjectSerializer, ProjectDetailSerializer
+
+
+@api_view(['GET', 'POST'])
+def project_list(request):
+    """获取项目列表或创建新项目"""
+    if request.method == 'GET':
+        projects = Project.objects.all()
+        serializer = ProjectSerializer(projects, many=True)
+        return Response(serializer.data)
+
+    elif request.method == 'POST':
+        serializer = ProjectSerializer(data=request.data)
+        if serializer.is_valid():
+            serializer.save()
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+
+@api_view(['GET', 'PUT', 'DELETE'])
+def project_detail(request, pk):
+    """获取、更新或删除项目"""
+    try:
+        project = Project.objects.get(pk=pk)
+    except Project.DoesNotExist:
+        return Response({'error': 'Project not found'}, status=status.HTTP_404_NOT_FOUND)
+
+    if request.method == 'GET':
+        serializer = ProjectDetailSerializer(project)
+        return Response(serializer.data)
+
+    elif request.method == 'PUT':
+        serializer = ProjectSerializer(project, data=request.data)
+        if serializer.is_valid():
+            serializer.save()
+            return Response(serializer.data)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    elif request.method == 'DELETE':
+        project.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)