feat: enhance player authentication and agent management features

- Updated AGENTS.md to clarify player interface bindings and agent account restrictions.
- Improved PlayerAuthLoginController to include captcha verification for player login.
- Enhanced AdminPlayerIndexController with permission checks for admin users.
- Refactored AdminPlayerStoreController to enforce agent node restrictions for non-super admins.
- Introduced new error codes for player authentication failures and updated related services.
- Enhanced validation rules for agent profiles to include settlement cycle options.
- Improved AdminCaptchaService to support separate scopes for admin and player captcha handling.
- Updated various services to ensure proper credit management and settlement processes.

app/Http/Controllers/Api/V1/Player/PlayerAuthCaptchaController.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\Player;
+
+use App\Http\Controllers\Controller;
+use App\Services\AdminCaptchaService;
+use App\Support\ApiResponse;
+use Illuminate\Http\JsonResponse;
+
+/** GET /api/v1/player/auth/captcha — 玩家账号密码登录图形验证码 */
+final class PlayerAuthCaptchaController extends Controller
+{
+    public function __invoke(AdminCaptchaService $captcha): JsonResponse
+    {
+        $payload = $captcha->create(AdminCaptchaService::SCOPE_PLAYER);
+
+        return ApiResponse::success([
+            'captcha_key' => $payload['captcha_key'],
+            'image_base64' => $payload['image_base64'],
+        ]);
+    }
+}