feat: implement advanced reward management and wheel customization

- Add customizable background color
- Add wheel animations and sound effects
- Add reward description field and winner modal
- Change font to Dana
- Add configurable reward probabilities
- Support reward types (Empty, Discount Code, LiveCoin)
- Replace reward title with reward type selector
- Allow wheel page title customization from admin panel

backend/app/db/models.py

@@ -1,26 +1,12 @@
-from sqlalchemy import Column
-from sqlalchemy import Integer
-from sqlalchemy import String
-
+from sqlalchemy import Column, Integer, String, Float
 from app.db.session import Base
 
-
 class Item(Base):
-
     __tablename__ = "items"
 
-    id = Column(
-        Integer,
-        primary_key=True,
-        index=True
-    )
-
-    title = Column(
-        String,
-        nullable=False
-    )
-
-    value = Column(
-        Integer,
-        nullable=False
-    )
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, nullable=False)
+    prize = Column(String, nullable=False)
+    description = Column(String, nullable=True, default="")
+    prize_type = Column(String, nullable=False, default="پوچ")
+    probability = Column(Float, nullable=False, default=1.0)