refactor(@angular/ssr): simplify redirect URL determination

The logic to determine the final URL for server-side rendering redirects is simplified. Previously, it used LocationStrategy and UrlSerializer to construct the final URL. This is replaced by using PlatformLocation to directly get the pathname, search, and hash.

This change removes unnecessary complexity and dependencies, making the code easier to understand and maintain.

(cherry picked from commit 6639085)

Author: alan-agius4

packages/angular/ssr/src/utils/ng.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import { LocationStrategy } from '@angular/common';
+import { PlatformLocation } from '@angular/common';
 import {
   ApplicationRef,
   type PlatformRef,
@@ -21,9 +21,9 @@ import {
   platformServer,
   ɵrenderInternal as renderInternal,
 } from '@angular/platform-server';
-import { ActivatedRoute, Router, UrlSerializer } from '@angular/router';
+import { ActivatedRoute, Router } from '@angular/router';
 import { Console } from '../console';
-import { joinUrlParts, stripIndexHtmlFromURL } from './url';
+import { stripIndexHtmlFromURL, stripTrailingSlash } from './url';
 
 /**
  * Represents the bootstrap mechanism for an Angular application.
@@ -107,16 +107,13 @@ export async function renderAngular(
 
     if (!routerIsProvided) {
       hasNavigationError = false;
-    } else if (lastSuccessfulNavigation?.finalUrl) {
+    } else if (lastSuccessfulNavigation) {
       hasNavigationError = false;
+      const { pathname, search, hash } = envInjector.get(PlatformLocation);
+      const finalUrl = [stripTrailingSlash(pathname), search, hash].join('');
 
-      const urlSerializer = envInjector.get(UrlSerializer);
-      const locationStrategy = envInjector.get(LocationStrategy);
-      const finalUrlSerialized = urlSerializer.serialize(lastSuccessfulNavigation.finalUrl);
-      const finalExternalUrl = joinUrlParts(locationStrategy.getBaseHref(), finalUrlSerialized);
-
-      if (urlToRender.href !== new URL(finalExternalUrl, urlToRender.origin).href) {
-        redirectTo = finalExternalUrl;
+      if (urlToRender.href !== new URL(finalUrl, urlToRender.origin).href) {
+        redirectTo = finalUrl;
       }
     }