feat: seed initial cards and chest catalog

backend/app/main.py

@@ -2,17 +2,30 @@ from fastapi import FastAPI, Depends, HTTPException
 from sqlalchemy.orm import Session
 from sqlalchemy import text
 from app.database import get_db, engine
-from app import models
+from app import models, seed
 
 # Create all tables
 models.Base.metadata.create_all(bind=engine)
 
 app = FastAPI(title="Card Game Backend")
 
+@app.on_event("startup")
+def startup_event():
+    db = next(get_db())
+    seed.seed_data(db)
+
 @app.get("/health")
 def health_check():
     return {"status": "ok"}
 
+@app.get("/catalog/cards")
+def get_cards(db: Session = Depends(get_db)):
+    return db.query(models.Card).all()
+
+@app.get("/catalog/chests")
+def get_chests(db: Session = Depends(get_db)):
+    return db.query(models.Chest).all()
+
 @app.get("/db-check")
 def db_check(db: Session = Depends(get_db)):
     try:

backend/app/seed.py

@@ -0,0 +1,36 @@
+from sqlalchemy.orm import Session
+from app import models
+
+INITIAL_CARDS = [
+    {"name": "Goblin Grunt", "rarity": "COMMON"},
+    {"name": "Elven Archer", "rarity": "COMMON"},
+    {"name": "Orc Warrior", "rarity": "COMMON"},
+    {"name": "Dwarven Shield", "rarity": "COMMON"},
+    {"name": "Healing Potion", "rarity": "COMMON"},
+    {"name": "Fireball Scroll", "rarity": "RARE"},
+    {"name": "Silver Sword", "rarity": "RARE"},
+    {"name": "Mystic Amulet", "rarity": "RARE"},
+    {"name": "Dragon Scale", "rarity": "LEGENDARY"},
+    {"name": "King's Crown", "rarity": "LEGENDARY"},
+]
+
+INITIAL_CHESTS = [
+    {"name": "Wooden Chest", "cost_gold": 100, "cards_per_open": 3}
+]
+
+def seed_data(db: Session):
+    # Seed Cards
+    for card_data in INITIAL_CARDS:
+        exists = db.query(models.Card).filter_by(name=card_data["name"]).first()
+        if not exists:
+            card = models.Card(**card_data)
+            db.add(card)
+    
+    # Seed Chests
+    for chest_data in INITIAL_CHESTS:
+        exists = db.query(models.Chest).filter_by(name=chest_data["name"]).first()
+        if not exists:
+            chest = models.Chest(**chest_data)
+            db.add(chest)
+    
+    db.commit()