Full app rebuild: FastAPI backend + React Native mobile with auth, championships, admin

Backend (FastAPI + SQLAlchemy + SQLite):
- JWT auth with access/refresh tokens, bcrypt password hashing
- User model with member/organizer/admin roles, auto-approve members
- Championship, Registration, ParticipantList, Notification models
- Alembic async migrations, seed data with test users
- Registration endpoint returns tokens for members, pending for organizers
- /registrations/my returns championship title/date/location via eager loading
- Admin endpoints: list users, approve/reject organizers

Mobile (React Native + Expo + TypeScript):
- Zustand auth store, Axios client with token refresh interceptor
- Role-based registration (Member vs Organizer) with contextual form labels
- Tab navigation with Ionicons, safe area headers, admin tab for admin role
- Championships list with status badges, detail screen with registration progress
- My Registrations with championship title, progress bar, and tap-to-navigate
- Admin panel with pending/all filter, approve/reject with confirmation
- Profile screen with role badge, Ionicons info rows, sign out
- Password visibility toggle (Ionicons), keyboard flow hints (returnKeyType)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/models/user.py

@@ -0,0 +1,44 @@
+import uuid
+from datetime import datetime
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, String, Uuid, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[uuid.UUID] = mapped_column(Uuid(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    email: Mapped[str] = mapped_column(String(255), unique=True, nullable=False, index=True)
+    hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
+    full_name: Mapped[str] = mapped_column(String(255), nullable=False)
+    phone: Mapped[str | None] = mapped_column(String(50))
+    # Organizer-specific fields
+    organization_name: Mapped[str | None] = mapped_column(String(255))
+    instagram_handle: Mapped[str | None] = mapped_column(String(100))
+    role: Mapped[str] = mapped_column(String(20), nullable=False, default="member")
+    # 'pending' | 'approved' | 'rejected'
+    status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
+    expo_push_token: Mapped[str | None] = mapped_column(String(255))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
+    )
+
+    refresh_tokens: Mapped[list["RefreshToken"]] = relationship(back_populates="user", cascade="all, delete-orphan")
+    registrations: Mapped[list["Registration"]] = relationship(back_populates="user")  # type: ignore[name-defined]
+    notification_logs: Mapped[list["NotificationLog"]] = relationship(back_populates="user")  # type: ignore[name-defined]
+
+
+class RefreshToken(Base):
+    __tablename__ = "refresh_tokens"
+
+    id: Mapped[uuid.UUID] = mapped_column(Uuid(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id: Mapped[uuid.UUID] = mapped_column(Uuid(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"))
+    token_hash: Mapped[str] = mapped_column(String(64), nullable=False, index=True)
+    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+    revoked: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    user: Mapped["User"] = relationship(back_populates="refresh_tokens")