Refresh web UI and make ML imports optional

services/game/app.py

@@ -280,8 +280,8 @@ def list_games() -> Dict[str, Any]:
 
 @app.post("/games")
 def create_game(payload: CreateGameRequest) -> Dict[str, Any]:
-    if payload.max_players < 2 or payload.max_players > 4:
-        raise HTTPException(status_code=400, detail="max_players must be 2-4")
+    if payload.max_players < 3 or payload.max_players > 4:
+        raise HTTPException(status_code=400, detail="max_players must be 3-4")
     game = manager.create_game(payload.name, payload.max_players, created_by=payload.created_by or "host")
     return _to_game_summary(game).model_dump()
 
@@ -361,8 +361,8 @@ async def start_game(game_id: str) -> Dict[str, Any]:
         raise HTTPException(status_code=400, detail="Game already started")
     slots = game.slots.get("slots", [])
     names = [slot.get("name") for slot in slots if slot.get("name")]
-    if len(names) < 2:
-        raise HTTPException(status_code=400, detail="Not enough players")
+    if len(names) < 3:
+        raise HTTPException(status_code=400, detail="Not enough players (need 3-4)")
     colors = ["red", "blue", "orange", "white"]
     for slot, color in zip(slots, colors):
         if slot.get("name"):