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/templates/models.py

@@ -0,0 +1,38 @@
+from django.db import models
+import uuid
+
+class CardTemplate(models.Model):
+    """扑克牌模板模型"""
+    id = models.CharField(max_length=50, primary_key=True)  # 'classic', 'modern', etc.
+    name = models.CharField(max_length=100)
+    description = models.TextField()
+    preview_image = models.ImageField(upload_to='templates/previews/', null=True)
+
+    # 默认配色方案
+    color_spade = models.CharField(max_length=20, default='#000000')
+    color_heart = models.CharField(max_length=20, default='#FF0000')
+    color_club = models.CharField(max_length=20, default='#000000')
+    color_diamond = models.CharField(max_length=20, default='#FF0000')
+    color_background = models.CharField(max_length=20, default='#FFFFFF')
+
+    # 默认素材路径（JSON）
+    default_assets = models.JSONField(default=dict)
+
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        ordering = ['name']
+
+
+class SuitSymbol(models.Model):
+    """花色图案模板"""
+    template = models.ForeignKey(CardTemplate, on_delete=models.CASCADE, related_name='suit_symbols')
+    suit_name = models.CharField(max_length=20)  # 'spade', 'heart', 'club', 'diamond'
+    svg_path = models.TextField()  # SVG路径数据
+    color = models.CharField(max_length=20)
+
+    def __str__(self):
+        return f"{self.template.name} - {self.suit_name}"