[Bug]: Tab is swallowed in the Add project browse path when there is nothing to complete #32452

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/web

Steps to reproduce

1. Open the command palette and choose Add project → Browse local.
2. With focus in the path input, type something that matches no folder (e.g. zzz), or leave it empty in a folder with several unrelated subfolders.
3. Press Tab.

Expected behavior

When Tab has nothing to complete, focus moves to the next control, like any other input. Tab completion (go up for .., open a single matching folder, fill in a shared prefix) keeps working when there is something to complete.

Actual behavior

Tab does nothing and focus stays in the input. The only way out by keyboard is Shift+Tab.

The browse Tab handler in apps/web/src/components/CommandPalette.tsx calls preventDefault() before deciding whether there is a completion, so a Tab with nothing to complete is swallowed silently. This is especially confusing for screen reader users, who get no feedback at all.

Impact

Minor bug or occasional failure

Version or commit

main @ 67fdc53

Environment

Windows 11, T3 Code desktop (also applies to web, same component)

Workaround

Press Shift+Tab to leave the input.