Expose plugin pages at /plugin/:id/page/:path

Add a public route to serve plugin extension pages without auth and update related pieces accordingly. Backend: register GET /plugin/:pluginId/page/:pagePath to locate the plugin router, validate page and HTML file existence, and send the file (returns appropriate 4xx/5xx errors). Frontend: switch iframe and new-window URLs to the new unauthenticated route (remove webui_token usage). Builtin plugin: clarify page registration comment and add a log line for the extension page URL. Minor formatting whitespace tweaks in plugin manager type annotations.

packages/napcat-onebot/network/plugin/manager.ts

@@ -195,7 +195,7 @@ export class OB11PluginManager extends IOB11NetworkAdapter<PluginConfig> impleme
     }
 
     // 创建获取其他插件导出的方法
-    const getPluginExports = <T = any>(pluginId: string): T | undefined => {
+    const getPluginExports = <T = any> (pluginId: string): T | undefined => {
       const targetEntry = this.plugins.get(pluginId);
       if (!targetEntry || !targetEntry.loaded || targetEntry.runtime.status !== 'loaded') {
         return undefined;