fix: add error handling to avoid ghost plugins (#4836)

* fix: add error handling to avoid ghost plugins

Add null checks to filter out incomplete plugin metadata objects that would appear as ghost plugins in the API response.

This fix ensures that plugins with all null key fields (name, author, desc, version, display_name) are not included in the plugin list response, preventing ghost plugins from appearing in the UI.

Issue: #4833

* fix: improve ghost plugin detection logic for better accuracy

---------

Co-authored-by: Soulter <905617992@qq.com>

astrbot/dashboard/routes/plugin.py

@@ -315,6 +315,17 @@ class PluginRoute(Route):
                 "display_name": plugin.display_name,
                 "logo": f"/api/file/{logo_url}" if logo_url else None,
             }
+            # 检查是否为全空的幽灵插件
+            if not any(
+                [
+                    plugin.name,
+                    plugin.author,
+                    plugin.desc,
+                    plugin.version,
+                    plugin.display_name,
+                ]
+            ):
+                continue
             _plugin_resp.append(_t)
         return (
             Response()