regression in `Context`/`c.json()` type inference in `v4.9.8`

[sigmachirality]

What version of Hono are you using?

4.9.8

What runtime/platform is your app running on? (with version if possible)

Bun (1.2.16), TypeScript (^5.8.2)

What steps can reproduce the bug?

import type { Context } from "hono";

export function test(c: Context) {
  return c.json("test", 200);
}

What is the expected behavior?

For this to typecheck/for TS language server to be able to infer the returned type without annotation here.

What do you see instead?

In 4.9.8, this gives the following type error:

The inferred type of 'test' cannot be named without a reference to '../../../../node_modules/hono/dist/types/context'. This is likely not portable. A type annotation is necessary.ts(2742)

Additional information

Reverting to 4.9.7 allows the TS language server to infer the returned type correctly.