feat: 默认页面模板增加上传按钮+对应后端接口

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

@@ -17,6 +17,7 @@ public class SitePagesController {
 
     private final SitePagesService sitePagesService;
     private final com.par.core.mapper.SiteMapper siteMapper;
+    private final com.par.core.storage.CachedStorageService storageService;
 
     @GetMapping("/api/v1/sites/{siteId}/pages")
     public ApiResponse<Map<String, Object>> getPages(@PathVariable String siteId) {
@@ -109,6 +110,21 @@ public class SitePagesController {
         return ApiResponse.success();
     }
 
+    /** 发布默认页面模板到云存储 */
+    @PutMapping("/api/v1/admin/default-pages/{type}/upload")
+    public ApiResponse<Void> uploadDefaultPages(
+            @PathVariable String type, @RequestBody Map<String, Object> payload, HttpServletRequest request) {
+        checkAdmin(request);
+        @SuppressWarnings("unchecked")
+        var entries = (List<Map<String, Object>>) payload.get("entries");
+        sitePagesService.savePages("default:" + type, entries != null ? entries : List.of());
+        String json = payload.containsKey("entries") 
+                ? new com.fasterxml.jackson.databind.ObjectMapper().writeValueAsString(entries)
+                : "[]";
+        storageService.store("pages/default/" + type + ".json", json);
+        return ApiResponse.success();
+    }
+
     private void checkAdmin(HttpServletRequest request) {
         var level = request.getAttribute("trustLevel");
         if (level == null || !"ADMIN".equals(level.toString())) {