Fix critical bug and deprecation warnings

- Fixed bug in games_router.py: player_result -> player_stmt in create_game
- Updated main.py lifespan from generator to @asynccontextmanager (FastAPI deprecation)
- security.py already uses datetime.now(timezone.utc) - no change needed
- All 28 tests pass

backend/app/main.py

@@ -15,7 +15,7 @@ Mounts all consolidated routers and provides centralized configuration.
 """
 import asyncio
 import logging
-from typing import AsyncGenerator
+from contextlib import asynccontextmanager
 
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
@@ -36,7 +36,8 @@ from app.core.logging import configure_logging
 logger = logging.getLogger(__name__)
 
 
-def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
+@asynccontextmanager
+async def lifespan(app: FastAPI):
     """Application lifespan events for startup and shutdown."""
     config = get_config()
     

backend/app/routers/games_router.py

@@ -346,7 +346,7 @@ async def create_game(
     
     # Fetch players for response
     player_stmt = select(GamePlayer).where(GamePlayer.game_id == new_game.id)
-    player_result = await db.execute(player_result)
+    player_result = await db.execute(player_stmt)
     players = player_result.scalars().all()
     
     new_game.players = [GamePlayerResponse.model_validate(p) for p in players]

backend/state.json

@@ -1,5 +1,5 @@
 {
-  "project_summary": "MTG Online backend API with FastAPI, SQLAlchemy, and SQLite. Phase 5 development complete with all 28 tests passing.",
+  "project_summary": "MTG Online backend API with FastAPI, SQLAlchemy, and SQLite. Phase 5 development complete with all tests passing.",
   "roadmap": [
     {"phase": "Phase 1-4", "status": "completed"},
     {"phase": "Phase 5 - Game Management", "status": "completed"},
@@ -14,21 +14,19 @@
   },
   "architectural_notes": "Single-process FastAPI app with async SQLAlchemy. SQLite for development/testing. JWT auth with user roles.",
   "task_description": "Fix remaining game model test failures",
-  "current_step": "All 28 tests passing",
+  "current_step": "All tests passing",
   "files_created": [],
   "files_modified": [
     "app/models/models.py"
   ],
   "decisions": [
-    "Use execution_options for implicit_returning in SQLAlchemy 2.0",
-    "Use datetime.now instead of func.now() for async serialization",
-    "Use lazy='selectin' for async-safe relationship loading",
-    "Add host_id field to GameHistory model"
+    "Added host_id field to GameHistory model",
+    "Changed players relationship to lazy='selectin' for async compatibility"
   ],
   "next_steps": [
-    "Phase 6 - WebSocket Game Server"
+    "Phase 6: WebSocket game server development"
   ],
   "blockers": [],
-  "commit_hash": "f7d6bfd",
-  "timestamp": "2026-10-18T04:02:00Z"
+  "commit_hash": "3926b57",
+  "timestamp": "2026-10-18T13:08:00Z"
 }