refactor(@angular/build): migrate to optimizeDeps.rolldownOptions in Vite config

Vite now uses Rolldown as the underlying engine to optimize dependencies, rendering `optimizeDeps.esbuildOptions` deprecated.

This commit refactors the Vite dev-server config in `@angular/build` to use `optimizeDeps.rolldownOptions` instead.
It also updates the custom dependency optimization plugin from the esbuild-specific format to a native Rolldown plugin using the `load` hook, and aligns browser target lowering by pushing `es2016` when Zone.js is present (since Rolldown lacks esbuild-style feature-support flags).

Author: alan-agius4

packages/angular/build/src/builders/dev-server/vite/index.ts

@@ -384,12 +384,17 @@ export async function* serveWithVite(
       const projectRoot = join(context.workspaceRoot, root as string);
       const browsers = getSupportedBrowsers(projectRoot, context.logger);
 
-      const target = transformSupportedBrowsersToTargets(browsers);
       // Needed for browser-esbuild as polyfills can be a string.
       const polyfills = Array.isArray((browserOptions.polyfills ??= []))
         ? browserOptions.polyfills
         : [browserOptions.polyfills];
 
+      const target = transformSupportedBrowsersToTargets(browsers);
+      if (!isZonelessApp(polyfills)) {
+        // Rolldown doesn't have an option to support Zone.js/async-await, so we need to support es2016.
+        target.push('es2016');
+      }
+
       let ssrMode: ServerSsrMode = ServerSsrMode.NoSsr;
       if (
         browserOptions.outputMode &&
@@ -418,7 +423,6 @@ export async function* serveWithVite(
         ssrMode,
         prebundleTransformer,
         target,
-        isZonelessApp(polyfills),
         componentStyles,
         templateUpdates,
         browserOptions.loader as EsbuildLoaderOption | undefined,

packages/angular/build/src/builders/dev-server/vite/server.ts

@@ -98,7 +98,6 @@ function createSsrConfig(
   externalMetadata: DevServerExternalResultMetadata,
   serverOptions: NormalizedDevServerOptions,
   prebundleTransformer: JavaScriptTransformer,
-  zoneless: boolean,
   target: string[],
   prebundleLoaderExtensions: EsbuildLoaderOption | undefined,
   thirdPartySourcemaps: boolean,
@@ -118,7 +117,6 @@ function createSsrConfig(
       include: externalMetadata.implicitServer,
       ssr: true,
       prebundleTransformer,
-      zoneless,
       target,
       loader: prebundleLoaderExtensions,
       thirdPartySourcemaps,
@@ -136,7 +134,6 @@ export async function setupServer(
   ssrMode: ServerSsrMode,
   prebundleTransformer: JavaScriptTransformer,
   target: string[],
-  zoneless: boolean,
   componentStyles: Map<string, ComponentStyleRecord>,
   templateUpdates: Map<string, string>,
   prebundleLoaderExtensions: EsbuildLoaderOption | undefined,
@@ -208,7 +205,6 @@ export async function setupServer(
             externalMetadata,
             serverOptions,
             prebundleTransformer,
-            zoneless,
             target,
             prebundleLoaderExtensions,
             thirdPartySourcemaps,
@@ -247,7 +243,6 @@ export async function setupServer(
       ssr: false,
       prebundleTransformer,
       target,
-      zoneless,
       loader: prebundleLoaderExtensions,
       thirdPartySourcemaps,
       define,