Refactor and enhance game management, user roles, and state handling

This commit introduces significant changes across the backend and frontend to improve game creation, joining, and member management. Key updates include adding a host role, structured handling of winners, and a New Game modal in the frontend. The refactor also simplifies join codes, improves persistence for user themes, and enhances overall user interaction with better UI feedback and logic.

backend/app/routes/auth.py

@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException, Request, Response
 from sqlalchemy.orm import Session
-
 from ..db import get_db
 from ..models import User
 from ..security import (
@@ -14,21 +13,25 @@ from ..security import (
 
 router = APIRouter(prefix="/auth", tags=["auth"])
 
+
 @router.post("/login")
 def login(data: dict, resp: Response, db: Session = Depends(get_db)):
     email = (data.get("email") or "").lower().strip()
     password = data.get("password") or ""
-    user = db.query(User).filter(User.email == email, User.disabled == False).first()  # noqa: E712
+    user = db.query(User).filter(User.email == email, User.disabled == False).first()
     if not user or not verify_password(password, user.password_hash):
         raise HTTPException(status_code=401, detail="invalid credentials")
+
     set_session(resp, make_session_value(user.id))
     return {"ok": True, "role": user.role, "email": user.email, "theme_key": user.theme_key}
 
+
 @router.post("/logout")
 def logout(resp: Response):
     clear_session(resp)
     return {"ok": True}
 
+
 @router.get("/me")
 def me(req: Request, db: Session = Depends(get_db)):
     uid = get_session_user_id(req)
@@ -39,6 +42,7 @@ def me(req: Request, db: Session = Depends(get_db)):
         raise HTTPException(status_code=401, detail="not logged in")
     return {"id": user.id, "email": user.email, "role": user.role, "theme_key": user.theme_key}
 
+
 @router.patch("/password")
 def set_password(data: dict, req: Request, db: Session = Depends(get_db)):
     uid = get_session_user_id(req)
@@ -49,19 +53,18 @@ def set_password(data: dict, req: Request, db: Session = Depends(get_db)):
     if len(password) < 8:
         raise HTTPException(status_code=400, detail="password too short (min 8)")
 
-    user = db.query(User).filter(User.id == uid, User.disabled == False).first()  # noqa: E712
+    user = db.query(User).filter(User.id == uid, User.disabled == False).first()
     if not user:
         raise HTTPException(status_code=401, detail="not logged in")
 
     user.password_hash = hash_password(password)
     db.add(user)
     db.commit()
-
     return {"ok": True}
 
+
 @router.patch("/theme")
 def set_theme(data: dict, req: Request, db: Session = Depends(get_db)):
-    """Persist user design selection server-side."""
     uid = get_session_user_id(req)
     if not uid:
         raise HTTPException(status_code=401, detail="not logged in")
@@ -70,7 +73,7 @@ def set_theme(data: dict, req: Request, db: Session = Depends(get_db)):
     if not theme_key:
         raise HTTPException(status_code=400, detail="theme_key required")
 
-    user = db.query(User).filter(User.id == uid, User.disabled == False).first()  # noqa: E712
+    user = db.query(User).filter(User.id == uid, User.disabled == False).first()
     if not user:
         raise HTTPException(status_code=401, detail="not logged in")