winget install . unexpectedly installs an unrelated Microsoft Store app

Relevant area(s)

WinGet CLI

Relevant command(s)

winget install

Brief description of your issue

winget install resolves a query consisting only of a single punctuation
character (e.g. .) to a single, seemingly confident match from the
msstore source, and proceeds directly to the license-agreement prompt —
with no disambiguation list and no indication that the match is essentially
arbitrary.

Steps to reproduce

1. Open a terminal in any folder (does not need to contain a manifest).
2. Run: winget install .

Expected behavior

Either:

• No results are returned (a punctuation-only string is not meaningful
  search input), or
• If a low-confidence match exists, winget shows it as part of a
  disambiguation list ("Multiple/weak packages found, please refine the
  input") rather than proceeding straight to the package-agreement /
  install flow.

Actual behavior

winget install . immediately resolves to a single package from the
Microsoft Store (in my case: WhatsApp, 9NKSQGP7F2NH) and shows the
license agreement prompt, ready to install on a single Enter/Y.

Environment

Windows-Paket-Manager v1.29.20-preview
Windows.Desktop v10.0.26200.8655
Microsoft.DesktopAppInstaller v1.30.20.0

Start by reproducing winget install . in the WinGet CLI and trace how the command resolves a punctuation-only query against the msstore source. Done means the command either returns no result or presents the match for disambiguation instead of proceeding directly to the license-agreement and install flow; add coverage for this behavior.