feat: 猜成语游戏 - 完整题库、管理后台、答题弹窗

- 创建 idioms 表（102条谜语式成语题库）和 idiom_game_rounds 表
- 后台成语管理页面：增删改题目 + 游戏参数（金币/经验/间隔）内联设置 + 出题按钮
- IdiomQuizController：出题/答题/当前回合查询，Redis 防并发抢答
- IdiomGameStarted / IdiomGameAnswered 广播事件
- 前端答题弹窗模块：聊天消息带【答题】按钮，点击弹出输入框
- GameConfig 注册 idiom 游戏，由 admin.game-configs 统一管理开关

app/Events/IdiomGameAnswered.php

@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * 文件功能：猜成语答题结果广播事件
+ *
+ * 用户答对成语时广播，通知房间内所有用户结果。
+ *
+ * @author   ChatRoom Laravel
+ *
+ * @version  1.0.0
+ */
+
+namespace App\Events;
+
+use Illuminate\Broadcasting\InteractsWithSockets;
+use Illuminate\Broadcasting\PresenceChannel;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class IdiomGameAnswered implements ShouldBroadcastNow
+{
+    use Dispatchable, InteractsWithSockets, SerializesModels;
+
+    /**
+     * @param  int  $roomId  房间 ID
+     * @param  int  $roundId  游戏回合 ID
+     * @param  string  $answer  正确答案
+     * @param  string  $winnerUsername  答对的用户名
+     * @param  int  $rewardGold  获得的金币
+     * @param  int  $rewardExp  获得的经验
+     */
+    public function __construct(
+        public readonly int $roomId,
+        public readonly int $roundId,
+        public readonly string $answer,
+        public readonly string $winnerUsername,
+        public readonly int $rewardGold = 0,
+        public readonly int $rewardExp = 0,
+    ) {}
+
+    public function broadcastOn(): array
+    {
+        return [
+            new PresenceChannel('room.'.$this->roomId),
+        ];
+    }
+
+    public function broadcastWith(): array
+    {
+        return [
+            'round_id' => $this->roundId,
+            'answer' => $this->answer,
+            'winner_username' => $this->winnerUsername,
+            'reward_gold' => $this->rewardGold,
+            'reward_exp' => $this->rewardExp,
+        ];
+    }
+}

app/Events/IdiomGameStarted.php

@@ -0,0 +1,63 @@
+<?php
+
+/**
+ * 文件功能：猜成语游戏开始广播事件
+ *
+ * 管理员手动出题时触发，广播成语提示到聊天室，前端显示提示+答题按钮。
+ *
+ * @author   ChatRoom Laravel
+ *
+ * @version  1.0.0
+ */
+
+namespace App\Events;
+
+use Illuminate\Broadcasting\InteractsWithSockets;
+use Illuminate\Broadcasting\PresenceChannel;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class IdiomGameStarted implements ShouldBroadcastNow
+{
+    use Dispatchable, InteractsWithSockets, SerializesModels;
+
+    /**
+     * @param  int  $roomId  房间 ID
+     * @param  string  $hint  谜语提示
+     * @param  int  $roundId  游戏回合 ID（前端提交答案时带上）
+     * @param  int  $rewardGold  答对奖励金币
+     * @param  int  $rewardExp  答对奖励经验
+     */
+    public function __construct(
+        public readonly int $roomId,
+        public readonly string $hint,
+        public readonly int $roundId,
+        public readonly int $rewardGold = 0,
+        public readonly int $rewardExp = 0,
+    ) {}
+
+    /**
+     * 广播频道
+     */
+    public function broadcastOn(): array
+    {
+        return [
+            new PresenceChannel('room.'.$this->roomId),
+        ];
+    }
+
+    /**
+     * 广播数据
+     */
+    public function broadcastWith(): array
+    {
+        return [
+            'round_id' => $this->roundId,
+            'hint' => $this->hint,
+            'reward_gold' => $this->rewardGold,
+            'reward_exp' => $this->rewardExp,
+            'message' => "🧩 猜成语时间！{$this->hint}",
+        ];
+    }
+}