fix(web): say why Blank profile is disabled, and drop a dead probe

At the profile cap the Blank profile item went grey with no explanation while the import rows stayed live, so the menu read as broken rather than full; a noninteractive item now names the cap, matching the menu's other explained states. Also deletes entryExists, which nothing reached once discovery moved to databaseFileExists and the lock probe inlined readLink.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
02672a0b20Julius Marminge committed on 9/4/2026, 6:20:41 AMparent27e528d
2 files changedLine totals unavailable