Dynamic Modal Interception is Greedy

Link to the code that reproduces this issue

https://github.com/khuezy/next-modal-bug

To Reproduce

1. npm install
2. npm run dev
3. Go to localhost:3000/gallery
4. Click on /gallery/dynamic
5. See dynamic route modal interception
6. Go back
7. Click /gallery/static
8. See that the static route is intercepted when it shouldn't

Current vs. Expected behavior

Modal Interception intercepts static routes as dynamic.

/app
  /gallery
    /[dynamic]
      page.tsx
    /static
      page.tsx
    /@modal
      /[dynamic]
        page.tsx

When linking to /gallery/static, the modal interceptor intercepts it as /gallery/[dynamic].

Without "@modal", the /gallery/static is processed before the /gallery/[dynamic] route. But with "@modal" interception, it is intercepting the /gallery/static path as [dynamic]

So with that, the expectation of "@modal" route interception is the same. "@modal" should not intercept static routes.

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 23.0.0: Fri Sep 15 14:41:43 PDT 2023; root:xnu-10002.1.13~1/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10
Binaries:
  Node: 22.6.0
  npm: 10.8.2
  Yarn: N/A
  pnpm: 9.7.0
Relevant Packages:
  next: 15.0.0-canary.173 // Latest available version is detected (15.0.0-canary.173).
  eslint-config-next: N/A
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.6.2
Next.js Config:
  output: N/A

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

Parallel & Intercepting Routes

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

next dev (local)

Additional context

No response

Run the linked reproduction with npm install and npm run dev, then inspect the app/gallery route tree, including page.tsx under [dynamic], static, and @modal/[dynamic]. Compare navigation to /gallery/dynamic and /gallery/static; done means dynamic routes still intercept while the static route is processed without interception.