refactor: extract GameService for Connect 4 NATS/chat handling

Move NATS subscription and chat room management into a dedicated
GameService, following the portigo service pattern. Handlers now
receive the service and call its methods instead of managing
NATS connections directly.

features/c4game/routes.go

@@ -4,24 +4,22 @@ package c4game
 import (
 	"github.com/alexedwards/scs/v2"
 	"github.com/go-chi/chi/v5"
-	"github.com/nats-io/nats.go"
 
 	"github.com/ryanhamamura/games/connect4"
-	"github.com/ryanhamamura/games/db/repository"
+	"github.com/ryanhamamura/games/features/c4game/services"
 )
 
 func SetupRoutes(
 	router chi.Router,
 	store *connect4.Store,
-	nc *nats.Conn,
+	svc *services.GameService,
 	sessions *scs.SessionManager,
-	queries *repository.Queries,
 ) {
 	router.Route("/games/{id}", func(r chi.Router) {
-		r.Get("/", HandleGamePage(store, sessions, queries))
-		r.Get("/events", HandleGameEvents(store, nc, sessions, queries))
+		r.Get("/", HandleGamePage(store, svc, sessions))
+		r.Get("/events", HandleGameEvents(store, svc, sessions))
 		r.Post("/drop", HandleDropPiece(store, sessions))
-		r.Post("/chat", HandleSendChat(store, nc, sessions, queries))
+		r.Post("/chat", HandleSendChat(store, svc, sessions))
 		r.Post("/join", HandleSetNickname(store, sessions))
 		r.Post("/rematch", HandleRematch(store, sessions))
 	})