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/routers/users.py

@@ -0,0 +1,46 @@
+import uuid
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.crud import crud_user
+from app.database import get_db
+from app.dependencies import get_admin
+from app.models.user import User
+from app.schemas.user import UserOut
+
+router = APIRouter()
+
+
+@router.get("", response_model=list[UserOut])
+async def list_users(
+    _admin: User = Depends(get_admin),
+    db: AsyncSession = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+):
+    return await crud_user.list_all(db, skip=skip, limit=limit)
+
+
+@router.patch("/{user_id}/approve", response_model=UserOut)
+async def approve_user(
+    user_id: uuid.UUID,
+    _admin: User = Depends(get_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    user = await crud_user.get_by_id(db, user_id)
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+    return await crud_user.set_status(db, user, "approved")
+
+
+@router.patch("/{user_id}/reject", response_model=UserOut)
+async def reject_user(
+    user_id: uuid.UUID,
+    _admin: User = Depends(get_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    user = await crud_user.get_by_id(db, user_id)
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+    return await crud_user.set_status(db, user, "rejected")