Route redirects do not respect `basePath`

Link to the code that reproduces this issue

https://github.com/nahtnam/base-path-bug

To Reproduce

1. Run the nextjs app
2. Go to localhost:3000/app/home, works great (https://base-path-bug.vercel.app/app/home)
3. Go to localhost:3000/app/server-component, redirects to the home perfectly (https://base-path-bug.vercel.app/app/server-component)
4. Go to localhost:3000/app/route, redirects to localhost:3000/home which is a 404 (https://base-path-bug.vercel.app/app/route)

Current vs. Expected behavior

The route redirect should also go to /app/route. The docs do not indicate different behavior for different placements of redirect with the same parameters: https://nextjs.org/docs/app/api-reference/functions/redirect

Verify canary release

• I verified that the issue exists in the latest Next.js canary release

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 22.6.0: Fri Sep 15 13:41:28 PDT 2023; root:xnu-8796.141.3.700.8~1/RELEASE_ARM64_T6000
Binaries:
  Node: 16.15.0
  npm: 8.5.5
  Yarn: 1.22.15
  pnpm: N/A
Relevant Packages:
  next: 13.5.4-canary.8
  eslint-config-next: N/A
  react: 18.2.0
  react-dom: 18.2.0
  typescript: 5.2.2
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

App Router, Middleware / Edge (API routes, runtime), Routing (next/router, next/navigation, next/link)

Additional context

No response

Start with the linked base-path-bug reproduction and compare the redirects from /app/server-component and /app/route under the Next.js App Router. Trace the basePath handling for route redirects and add regression coverage for the failing case; done means /app/route redirects to /app/home rather than an unprefixed 404 path.