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

resources/views/chat/frame.blade.php

@@ -252,6 +252,34 @@
     @include('chat.partials.system-events')
     {{-- 初始历史消息、入场欢迎、进场特效、会员横幅和挂起婚姻事件已迁移到 resources/js/chat-room/initial-state.js --}}
 
+    {{-- 猜成语答题弹窗 --}}
+    <div id="idiom-answer-modal"
+        style="display:none;position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:99999;justify-content:center;align-items:center;backdrop-filter:blur(3px);">
+        <div style="background:#fff;border-radius:16px;width:min(90vw,460px);box-shadow:0 24px 64px rgba(0,0,0,.22);overflow:hidden;animation:gdSlideIn .2s ease;">
+            <div style="padding:18px 22px;background:linear-gradient(135deg,#7c3aed,#a78bfa);color:#fff;">
+                <div style="font-size:18px;font-weight:bold;">🧩 猜成语</div>
+                <div id="idiom-answer-reward" style="font-size:12px;margin-top:4px;opacity:.9;"></div>
+            </div>
+            <div style="padding:20px 22px;">
+                <p id="idiom-answer-hint" style="font-size:15px;color:#1e293b;line-height:1.7;margin-bottom:16px;"></p>
+                <input id="idiom-answer-input" type="text" autocomplete="off" placeholder="输入成语答案..."
+                    style="width:100%;box-sizing:border-box;padding:12px 14px;border:2px solid #e5e7eb;border-radius:10px;font-size:15px;outline:none;transition:border-color .2s;"
+                    onfocus="this.style.borderColor='#7c3aed'" onblur="this.style.borderColor='#e5e7eb'">
+                <p id="idiom-answer-feedback" style="margin-top:8px;font-size:13px;min-height:20px;"></p>
+            </div>
+            <div style="padding:0 22px 18px;display:flex;gap:10px;">
+                <button type="button" data-idiom-answer-close
+                    style="flex:1;padding:11px;background:#f3f4f6;color:#555;border:none;border-radius:10px;font-size:14px;cursor:pointer;font-weight:bold;">
+                    取消
+                </button>
+                <button type="button" data-idiom-answer-submit id="idiom-answer-submit"
+                    style="flex:1;padding:11px;background:linear-gradient(135deg,#7c3aed,#a78bfa);color:#fff;border:none;border-radius:10px;font-size:14px;cursor:pointer;font-weight:bold;">
+                    提交答案
+                </button>
+            </div>
+        </div>
+    </div>
+
 </body>
 
 </html>