Add React frontend and clean up legacy HTTP backend

frontend/src/store/gameStore.ts

@@ -0,0 +1,46 @@
+import { create } from 'zustand';
+import type { GameInfo, GameStatusPayload, Hand, MyPlayer } from '../types';
+
+interface GameStore {
+  games: GameInfo[];
+  myPlayer: MyPlayer | null;
+  gameStatus: GameStatusPayload | null;
+  hand: Hand;
+  error: string | null;
+
+  setGames: (games: GameInfo[]) => void;
+  setMyPlayer: (player: MyPlayer | null) => void;
+  setGameStatus: (status: GameStatusPayload) => void;
+  setHand: (hand: Hand) => void;
+  setError: (error: string | null) => void;
+  clearError: () => void;
+  updatePlayerConnection: (order: number, connected: boolean) => void;
+  reset: () => void;
+}
+
+export const useGameStore = create<GameStore>((set) => ({
+  games: [],
+  myPlayer: null,
+  gameStatus: null,
+  hand: {},
+  error: null,
+
+  setGames: (games) => set({ games }),
+  setMyPlayer: (myPlayer) => set({ myPlayer }),
+  setGameStatus: (gameStatus) => set({ gameStatus }),
+  setHand: (hand) => set({ hand }),
+  setError: (error) => set({ error }),
+  clearError: () => set({ error: null }),
+  updatePlayerConnection: (order, connected) =>
+    set((state) => ({
+      gameStatus: state.gameStatus
+        ? {
+            ...state.gameStatus,
+            players: state.gameStatus.players.map((p) =>
+              p.order === order ? { ...p, connected } : p
+            ),
+          }
+        : null,
+    })),
+  reset: () => set({ myPlayer: null, gameStatus: null, hand: {}, error: null }),
+}));