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/serializers.py

@@ -0,0 +1,29 @@
+from rest_framework import serializers
+from .models import Project, Asset, CardLayer
+
+
+class ProjectSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Project
+        fields = '__all__'
+
+
+class AssetSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Asset
+        fields = '__all__'
+
+
+class CardLayerSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CardLayer
+        fields = '__all__'
+
+
+class ProjectDetailSerializer(serializers.ModelSerializer):
+    assets = AssetSerializer(many=True, read_only=True)
+    layers = CardLayerSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = Project
+        fields = '__all__'