fix(vercel): Fix srcset generation not working on Vercel

.changeset/nine-radios-peel.md

@@ -0,0 +1,7 @@
+---
+"@astrojs/vercel": patch
+---
+
+Fixes `widths` and `densities` not working when using Vercel's Image Optimization.
+
+Note that you still need to make sure that the widths you're outputting are enabled in [the `imageConfig` property of the Vercel adapter](https://docs.astro.build/en/guides/integrations-guide/vercel/#imagesconfig) in order for these properties to work.

packages/integrations/vercel/src/image/build-service.ts

@@ -1,7 +1,9 @@
 import type { ExternalImageService } from 'astro';
 import { isESMImportedImage, sharedValidateOptions } from './shared.js';
+import { baseService } from 'astro/assets';
 
 const service: ExternalImageService = {
+	...baseService,
 	validateOptions: (options, serviceOptions) =>
 		sharedValidateOptions(options, serviceOptions.service.config, 'production'),
 	getHTMLAttributes(options) {
@@ -29,7 +31,7 @@ const service: ExternalImageService = {
 			}
 		}
 
-		const { src, width, height, format, quality, ...attributes } = props;
+		const { src, width, height, format, quality, densities, widths, formats, ...attributes } = options;
 
 		return {
 			...attributes,

packages/integrations/vercel/src/image/shared-dev-service.ts

@@ -1,7 +1,9 @@
 import type { LocalImageService } from 'astro';
+import { baseService } from 'astro/assets';
 import { sharedValidateOptions } from './shared.js';
 
 export const baseDevService: Omit<LocalImageService, 'transform'> = {
+	...baseService,
 	validateOptions: (options, serviceOptions) =>
 		sharedValidateOptions(options, serviceOptions.service.config, 'development'),
 	getURL(options) {