> [!TIP]
> This PR is best reviewed commit by commit.
### Why?
With `output: 'export'`, an empty array or incomplete params can be
reported as a missing `generateStaticParams` function, even when the
function exists.
### How?
- Throw when any `generateStaticParams` invocation returns `[]`.
- Throw when any composed parent and child params object omits a dynamic
route parameter.
- Extend the troubleshooting page added in #95968 with the
export-specific cases.
Stacked on #95968.
Supersedes #95388.
<!-- NEXT_JS_LLM -->
Co-authored-by: SukkaW <isukkaw@gmail.com>
> [!TIP]
> This PR is best reviewed commit by commit.
### Why?
`generateStaticParams` must return an array of objects, but Next.js does
not currently provide a clear error when it returns something else.
### How?
- Throw when `generateStaticParams` does not return an array.
- Throw when an item in the returned array is not an object.
- Keep allowing `{}`. The follow-up rejects it with `output: 'export'`
when it leaves a dynamic route parameter missing.
Follow-up: #95969
Supersedes #95388.
<!-- NEXT_JS_LLM -->
Co-authored-by: SukkaW <isukkaw@gmail.com>
---------
Co-authored-by: Joseph <joseph.chamochumbi@vercel.com>
Jiwon Choi