Refactor ImageResponse route signatures

src/app/(static)/home-image/route.tsx

@@ -23,5 +23,5 @@ export async function GET(request: Request): Promise<ImageResponse> {
   return new ImageResponse(
     <HomeImageResponse {...{ photos, request, width, height }}/>,
     { width, height, headers },
-  );
+  ) as Response;
 }

src/app/(static)/p/[photoId]/image/route.tsx

@@ -28,5 +28,5 @@ export async function GET(
   return new ImageResponse(
     <PhotoImageResponse {...{ photo, request, width, height, fontFamily }} />,
     { width, height, fonts, headers },
-  );
+  ) as Response;
 }

src/app/(static)/t/[tag]/image/route.tsx

@@ -34,5 +34,5 @@ export async function GET(
   return new ImageResponse(
     <TagImageResponse {...{ photos, request, width, height, fontFamily }}/>,
     { width, height, fonts, headers },
-  );
+  ) as Response;
 }

src/app/(static)/template-image-tight/route.tsx

@@ -12,7 +12,7 @@ import { ImageResponse } from '@vercel/og';
 
 export const runtime = 'edge';
 
-export async function GET(request: Request): Promise<ImageResponse> {
+export async function GET(request: Request) {
   const photos = await getPhotos('priority', MAX_PHOTOS_TO_SHOW_TEMPLATE_TIGHT);
 
   const {
@@ -42,5 +42,5 @@ export async function GET(request: Request): Promise<ImageResponse> {
       fonts,
       headers,
     },
-  );
+  ) as Response;
 }

src/app/(static)/template-image/route.tsx

@@ -33,5 +33,5 @@ export async function GET(request: Request): Promise<ImageResponse> {
       }}/>
     ),
     { width, height, fonts, headers },
-  );
+  ) as Response;
 }