Add game-ended notification

Fires the first time a game transitions from non-over to any over-state
(OVER/FINAL/OFF), so the notification lands when the clock runs out
rather than hours later when NHL statisticians stamp OFF. Shows the
winning team's logo with a "{TEAM} wins" title and final score body.

Deduped by game ID via gameEndsSent; cleared on resetForNewDay.
Dev menu: "Test Game Ended Notification" for manual trigger.

IceGlass/Services/MainService.swift

@@ -219,6 +219,12 @@ class MainService: @unchecked Sendable {
                     notificationManager.notifyGameStarted(game)
                 }
 
+                // Game ended: transition to any over-state (OVER/FINAL/OFF)
+                if let prevState = previousState, !prevState.isOver, currentState.isOver {
+                    logger.info("Game \(game.id) ended: \(game.awayTeam.abbrev) \(game.awayTeam.score ?? 0) — \(game.homeTeam.abbrev) \(game.homeTeam.score ?? 0)")
+                    notificationManager.notifyGameEnded(game)
+                }
+
                 if game.gameType == 3,
                    let prevState = previousState, !prevState.isOver, currentState.isOver {
                     hadPlayoffFinalTransition = true