前端配置迁至 config/local.js，完善支付、模板库与部署脚本

- 页面直接引用 local.js 设置 SOON_DEPLOY_CONFIG，移除 deploy-config
- Docker sync-config 生成 local.js；更新 README 与 agent-core 说明
- 模板库自动扫描 .soon；新增后端部署/种子/排查脚本
- 完善支付配置、订阅弹窗与后台支付管理页

Co-authored-by: Cursor <cursoragent@cursor.com>

backend-web/scripts/check-soon-models.php

@@ -0,0 +1,45 @@
+<?php
+declare(strict_types=1);
+
+if (PHP_SAPI !== 'cli') {
+    fwrite(STDERR, "CLI only\n");
+    exit(1);
+}
+
+require dirname(__DIR__) . '/src/bootstrap.php';
+
+use Soon\Api\Core\Config;
+use Soon\Api\Services\SoonModelService;
+
+$configured = rtrim((string)Config::get('storage.models_dir', ''), '/\\');
+$local = SOON_SERVER_ROOT . '/soonModels';
+
+fwrite(STDOUT, "configured models_dir: {$configured}\n");
+fwrite(STDOUT, "  is_dir=" . (@is_dir($configured) ? 'yes' : 'no') . ' readable=' . (@is_readable($configured) ? 'yes' : 'no') . "\n");
+
+fwrite(STDOUT, "backend soonModels: {$local}\n");
+fwrite(STDOUT, "  is_dir=" . (@is_dir($local) ? 'yes' : 'no') . ' readable=' . (@is_readable($local) ? 'yes' : 'no') . "\n");
+
+$roots = SoonModelService::roots();
+fwrite(STDOUT, 'scan roots: ' . (count($roots) ? implode(', ', $roots) : '(none)') . "\n");
+
+foreach ($roots as $root) {
+    $entries = @scandir($root) ?: [];
+    $soon = array_values(array_filter($entries, static fn(string $e): bool => str_ends_with(strtolower($e), '.soon')));
+    fwrite(STDOUT, "  {$root} => " . count($soon) . " .soon\n");
+    foreach ($soon as $f) {
+        fwrite(STDOUT, "    - {$f}\n");
+    }
+}
+
+$items = SoonModelService::list();
+fwrite(STDOUT, 'API items: ' . count($items) . "\n");
+foreach ($items as $item) {
+    fwrite(STDOUT, '  - ' . ($item['name'] ?? '') . ' (' . ($item['file'] ?? '') . ")\n");
+}
+
+if ($configured !== '' && !@is_readable($configured)) {
+    fwrite(STDOUT, "\nHint: PHP 读不到 configured 目录。把 .soon 复制到后端 {$local}，或在宝塔后端站点防跨站放行：{$configured}\n");
+}
+
+exit(count($items) > 0 ? 0 : 1);