fix(ssr): bootstrap standalone app for CommonEngine

Passing EnvironmentProviders via CommonEngine StaticProvider[] dropped
provideZoneChangeDetection, causing ZoneStablePendingTask2 on render.
Use bootstrapApplication + mergeApplicationConfig instead.

server.ts

@@ -5,7 +5,7 @@ import { CommonEngine } from '@angular/ssr/node';
 import express from 'express';
 import { existsSync } from 'node:fs';
 import { join } from 'node:path';
-import AppServerModule from './src/main.server';
+import bootstrap from './src/main.server';
 
 const STRAVA_API_BASE = 'https://www.strava.com/api/v3';
 const FACEIT_API_BASE = 'https://open.faceit.com';
@@ -230,11 +230,8 @@ export function app(): express.Express {
 
     commonEngine
       .render({
-        bootstrap: AppServerModule.bootstrap,
-        providers: [
-          ...AppServerModule.providers,
-          { provide: APP_BASE_HREF, useValue: baseUrl },
-        ] as unknown as import('@angular/core').StaticProvider[],
+        bootstrap,
+        providers: [{ provide: APP_BASE_HREF, useValue: baseUrl }],
         documentFilePath: indexHtml,
         url: `${protocol}://${headers.host}${originalUrl}`,
         publicPath: distFolder,
@@ -262,4 +259,4 @@ if (moduleFilename === __filename || moduleFilename.includes('iisnode')) {
   run();
 }
 
-export default AppServerModule.bootstrap;
+export default bootstrap;