Blankey 0.2.6

• Automatic updates: Blankey looks for a new version shortly after launch and every six hours. On macOS and Windows it
  downloads the update in the background and offers "Restart to update" in the menu and on the Connections page; the
  restart locks the vault. Linux packages say a new version is out and link to its release. Turn the checks off on the
  Connections page (Updates); Check now works either way.
• On macOS the first launch after an update may ask for keychain access again before Touch ID unlock works, as after a
  manual reinstall: the app is signed ad hoc, so each build has a new signature.
• check_bindings checks real values only for plain {{ role.key }} bindings and never evaluates computed expressions
  on vault data; it no longer reports fit ratios or missing glyphs.
• Agents on Blankey Online (claude.ai) ask before reading a file from your template folders: request_file with
  source: "lib:<id>" shows the file, and you allow it. Local agents read them directly as before.
• The fill window's preview no longer shows large boxes over blanks that have no value yet.