feat(AI): 新增小班长随机赠送金币福利功能，支持 [ACTION:GIVE_GOLD] 拦截与全服广播

app/Http/Controllers/ChatBotController.php

@@ -13,14 +13,17 @@
 
 namespace App\Http\Controllers;
 
+use App\Enums\CurrencySource;
 use App\Events\MessageSent;
 use App\Jobs\SaveMessageJob;
 use App\Models\Sysparam;
 use App\Services\AiChatService;
 use App\Services\ChatStateService;
+use App\Services\UserCurrencyService;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\Redis;
 
 class ChatBotController extends Controller
 {
@@ -30,6 +33,7 @@ class ChatBotController extends Controller
     public function __construct(
         private readonly AiChatService $aiChat,
         private readonly ChatStateService $chatState,
+        private readonly UserCurrencyService $currencyService,
     ) {}
 
     /**
@@ -81,13 +85,57 @@ class ChatBotController extends Controller
 
             $result = $this->aiChat->chat($user->id, $message, $roomId);
 
+            $reply = $result['reply'];
+
+            // 检查 AI 是否决定给用户发金币
+            if (str_contains($reply, '[ACTION:GIVE_GOLD]')) {
+                $reply = str_replace('[ACTION:GIVE_GOLD]', '', $reply);
+                $reply = trim($reply);
+
+                $redisKey = 'ai_chat:give_gold:'.date('Ymd').':'.$user->id;
+                // 原子操作，防止并发多次领取
+                if (Redis::setnx($redisKey, 1)) {
+                    Redis::expire($redisKey, 86400); // 缓存 24 小时
+
+                    // 给用户发放随机 100~5000 金币
+                    $goldAmount = rand(100, 5000);
+                    $this->currencyService->change(
+                        $user,
+                        'gold',
+                        $goldAmount,
+                        CurrencySource::AI_GIFT,
+                        'AI小班长发善心赠送的金币福利',
+                        $roomId
+                    );
+
+                    // 发送全场大广播
+                    $sysMsg = [
+                        'id' => $this->chatState->nextMessageId($roomId),
+                        'room_id' => $roomId,
+                        'from_user' => '系统传音',
+                        'to_user' => '大家',
+                        'content' => "🤖 听闻小萌新哭穷，AI小班长看【{$user->username}】骨骼惊奇，大方地赏赐了 {$goldAmount} 枚金币福利！",
+                        'is_secret' => false,
+                        'font_color' => '#d97706', // 橙色醒目
+                        'action' => '大声宣告',
+                        'sent_at' => now()->toDateTimeString(),
+                    ];
+                    $this->chatState->pushMessage($roomId, $sysMsg);
+                    broadcast(new MessageSent($roomId, $sysMsg));
+                    SaveMessageJob::dispatch($sysMsg);
+                } else {
+                    // 如果已经领过了，修改回复提醒
+                    $reply = $reply."\n\n(系统提示：你今天已经领过金币福利啦，每天只能领一次哦！)";
+                }
+            }
+
             // 广播 AI 回复消息
             $botMsg = [
                 'id' => $this->chatState->nextMessageId($roomId),
                 'room_id' => $roomId,
                 'from_user' => 'AI小班长',
                 'to_user' => $user->username,
-                'content' => $result['reply'],
+                'content' => $reply,
                 'is_secret' => false,
                 'font_color' => '#16a34a',
                 'action' => '',