fix: clear enter lock when select is disabled - #1248

Approved exact head 6449ac52419fbd2ef278a4809ba2fb4ed1dfeea6.

The reset is correctly scoped to the existing disabled-state effect: an interrupted Enter interaction clears only the stale selection lock while the same effect already closes the popup and removes focus. Re-enabling the Select therefore restores the first Enter selection without changing ordinary keyup/blur handling.

The complete repository passes 21/21 suites, 437/437 tests, and 21/21 snapshots. TypeScript, ESM/CJS/declaration builds, Less compilation, and lint with zero errors also pass; the reported warnings are existing hook/demo warnings outside this three-line behavior change.

I additionally performed a causal base/head check with the submitted regression. Removing only the new lock reset made the expected [3, 2, 1] selection sequence fail as [3, 2], proving that the first post-enable Enter remained swallowed. Restoring the exact head made the same focused regression pass.

The only remote failure is the fork Vercel authorization gate, not a source check.

Codex-assisted review: Codex traced the Enter lock lifecycle, ran the complete repository and build validation, and executed the isolated causal reversal against the exact head. No repository files were changed.