fix(web): keep unsupported browsers out of the import menu

Two review findings: the import menu only hid uninstalled sources, so a
platform that can never import from a browser (a macOS-only fork on Linux)
still listed it and clicking led to a dead-end blocked screen — those are now
left out too. And the "Default profile" search entry lost the word "browser"
when its settings row went away, which broke the "default browser profile"
query and read ambiguously beside its siblings; the search-only title says
"Default browser profile" again.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
29003db1d2Julius Marminge committed on 9/4/2026, 6:20:41 AMparentc932203
2 files changedLine totals unavailable