`opengraph-image` route cannot use Node.js APIs in the `nodejs` runtime if its corresponding Page is in the `edge` runtime

### Link to the code that reproduces this issue https://codesandbox.io/p/devbox/zen-panini-rxx6zk ### To Reproduce 1. Create `app/page.tsx`, use `edge` runtime 2. Add `app/opengraph-image.tsx`, load custom font, following [the docs](https://nextjs.org/docs/app/api-reference/file-conventions/metadata/opengraph-image#generate-images-using-code-js-ts-tsx) (requires `nodejs` runtime) 3. Run `next dev` and open `/` page 4. Get a `Native module not found: node:fs/promises` error 5. Open `/opengraph-image` route manually 6. Get a rendered image (200 OK) with an error (warning) logged to the dev server console ### Current vs. Expected behavior # Current behavior If a `page.tsx` uses the `edge` runtime, but its `opengraph-image.tsx` uses the `nodejs` runtime, it appears as though `opengraph-image.tsx` is being imported once inside NodeJS and a second time inside the Edge environment. Since the example imports NodeJS-specific modules and uses `process.cwd()` APIs, it fails to load in the Edge environment. It still manages to render the OG image successfully when visiting the route manually, but it fails to build and errors are logged in the `next dev` stdout. If we use the `edge` runtime for both files, but keep the NodeJS-specific modules and APIs, image generation fails completely. ## In dev server - The `/` page fails to load, because the Edge runtime tries to load NodeJS modules: <details> <summary>See error message</summary> ``` ○ Compiling / ... ✓ Compiled / in 7.5s ⨯ Error: Failed to load external module node:fs/promises: TypeError: Native module not found: node:fs/promises at [project]/app/opengraph-image.tsx [app-edge-rsc] (ecmascript) (app/opengraph-image.tsx:2:0) at [project]/app/opengraph-image--metadata.js [app-edge-rsc] (ecmascript) (app/opengraph-image--metadata.js:1:0) 1 | import { ImageResponse } from "next/og"; > 2 | import { readFile } from "node:fs/promises"; 3 | import { join } from "node:path"; 4 | 5 | export const runtime = "nodejs"; …