feat: GET /configs/{siteId}/script 无版本号取最新脚本+默认模板回退

par-api/src/main/java/com/par/api/controller/ConfigController.java

@@ -3,6 +3,8 @@ package com.par.api.controller;
 import com.par.core.dto.ApiResponse;
 import com.par.core.dto.SiteConfigDTO;
 import com.par.core.entity.SiteConfig;
+import com.par.core.adapter.GroovyScriptEngine;
+import com.par.core.mapper.SiteMapper;
 import com.par.core.service.ConfigService;
 import com.par.core.storage.CachedStorageService;
 import jakarta.servlet.http.HttpServletRequest;
@@ -25,6 +27,7 @@ public class ConfigController {
 
     private final ConfigService configService;
     private final CachedStorageService storageService;
+    private final SiteMapper siteMapper;
 
     public ConfigController(ConfigService configService, CachedStorageService storageService) {
         this.configService = configService;
@@ -117,6 +120,38 @@ public class ConfigController {
                 .body(content);
     }
 
+    /**
+     * 下载最新版本 Groovy 脚本（供 mediabot 使用）
+     * 优先自定义脚本，无自定义则返回站点类型默认模板
+     */
+    @GetMapping("/{siteId}/script")
+    public ResponseEntity<String> downloadLatestScript(@PathVariable("siteId") String siteId) {
+        // 1. 尝试最新自定义脚本
+        SiteConfig latest = configService.getLatestConfig(siteId);
+        if (latest != null && latest.getScriptStoragePath() != null && !latest.getScriptStoragePath().isBlank()) {
+            try {
+                String script = storageService.read(latest.getScriptStoragePath());
+                if (script != null && !script.isBlank()) {
+                    return ResponseEntity.ok()
+                            .header(HttpHeaders.CONTENT_TYPE, "text/plain;charset=UTF-8")
+                            .body(script);
+                }
+            } catch (Exception ignored) {}
+        }
+
+        // 2. 回退到站点类型默认脚本
+        var site = siteMapper.selectBySiteId(siteId);
+        String siteType = site != null && site.getSiteType() != null ? site.getSiteType().getValue() : null;
+        String defaultScript = GroovyScriptEngine.loadDefaultByType(siteType);
+        if (defaultScript != null) {
+            return ResponseEntity.ok()
+                    .header(HttpHeaders.CONTENT_TYPE, "text/plain;charset=UTF-8")
+                    .body(defaultScript);
+        }
+
+        return ResponseEntity.notFound().build();
+    }
+
     /**
      * 下载指定版本 Groovy 脚本（供 mediabot 使用）
      */