v1.2.0 — works with multiple tabs in one window

Fixes a silent no-op reported on r/SideProject.

The bug. Terminal draws only the selected tab's body and gives the tab bar no colour of its own. So for anyone running several tabs in one window, painting a background tab was invisible exactly when it mattered, and selecting that tab cleared it before they saw it. The feature did nothing for them and never said so.

The fix. A tab that shares a window now gets a dot in front of its tab title instead of the wash:

  ● api          <- finished, you have not looked
    web
    docs         <- selected

The dot is stripped the moment you select the tab. It is located with a zero-width U+2060 sentinel rather than a stored copy of your title, so it is stripped rather than restored and can never overwrite something you set with /rename. Glyph is configurable with TABTINT_MARK.

One-tab windows are unchanged and still get the colour wash, and the Stop hook folds focus detection into the same Apple Event so they pay no extra round trip.

If you do not see the dot, enable Terminal > Settings > Profiles > Window > Title > "Custom title". AppleScript cannot read that checkbox, so the tool cannot warn you automatically.