Main-thread unhandled exceptions now show the traceback and log path; worker-thread exceptions log without touching Qt widgets. The download watcher catches its own loop failures and reports that it stopped instead of surfacing a blank error dialog. Adds a regression test for the watcher failure path.
Co-Authored-By: Claude Code <noreply@anthropic.com>
Adds the PyQt6 Windows client (Homepage, Scan & results, About & updates, Settings), ClamAV scanning and quarantine, browser-download watch with an exclusive scan gate, Bolt loopback/PKCE sign-in with DPAPI key storage, Gitea release feed with checksum verification, opt-in diagnostics, and Windows/portable build tooling.
Co-Authored-By: Claude Code <noreply@anthropic.com>
