Make the countdown narrow enough for the slot it sits in

Text(style: .timer) renders 1:23:45 once more than an hour out. An
accessoryCorner has room for three or four characters beside its curved label,
and a circular gauge for about the same, so the live timer overlapped what it
sat next to.

Replaced with a compact value — "23m", "2h", "3d" — recomputed per timeline
entry, which is why the timeline now carries a mark every minute for the first
hour. Both corner kinds and the gauge also get lineLimit(1) and a minimum scale
factor, so an unexpectedly wide value shrinks instead of colliding.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CalendarrWatchShared/WatchL10n.swift

@@ -26,6 +26,7 @@ enum WatchL10n {
             "watch.calendars":      "Kalender",
             "watch.allday":         "Ganztägig",
             "watch.no_events":      "Keine Termine",
+            "watch.now":            "jetzt",
             "watch.today":          "Heute",
             "watch.tomorrow":       "Morgen",
             "watch.events_today":   "Termine",
@@ -41,6 +42,7 @@ enum WatchL10n {
             "watch.calendars":      "Calendars",
             "watch.allday":         "All-day",
             "watch.no_events":      "No events",
+            "watch.now":            "now",
             "watch.today":          "Today",
             "watch.tomorrow":       "Tomorrow",
             "watch.events_today":   "events",