v0.11.3 — it notices new releases while running

The update check now happens more than once

start_update_check() ran exactly once, when the window opened. So a release published while the app was running was never seen — it sat there looking current until the next restart. If the tool has ever seemed to ignore a new version, that is why.

• It re-checks every 30 minutes while the window is open.
• About ▸ Check for updates asks immediately, and says "You are on the newest release" when there is nothing — something a background check can never tell you.
• An explicit check also clears a version you previously skipped, because asking is asking.

The download and the swap are unchanged, including the guard from v0.10.4 that refuses any asset which does not identify itself as the version its tag claims.