Add admin panel

backend/app/models/user.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 from enum import Enum
-from sqlalchemy import String, BigInteger, DateTime
+from sqlalchemy import String, BigInteger, DateTime, Boolean, ForeignKey, Integer
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.core.database import Base
@@ -27,6 +27,13 @@ class User(Base):
     role: Mapped[str] = mapped_column(String(20), default=UserRole.USER.value)
     created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
 
+    # Ban fields
+    is_banned: Mapped[bool] = mapped_column(Boolean, default=False)
+    banned_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    banned_until: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)  # None = permanent
+    banned_by_id: Mapped[int | None] = mapped_column(Integer, ForeignKey("users.id"), nullable=True)
+    ban_reason: Mapped[str | None] = mapped_column(String(500), nullable=True)
+
     # Relationships
     created_marathons: Mapped[list["Marathon"]] = relationship(
         "Marathon",
@@ -47,6 +54,11 @@ class User(Base):
         back_populates="approved_by",
         foreign_keys="Game.approved_by_id"
     )
+    banned_by: Mapped["User | None"] = relationship(
+        "User",
+        remote_side="User.id",
+        foreign_keys=[banned_by_id]
+    )
 
     @property
     def is_admin(self) -> bool: