Add playoff round view, game numbers, goal scorer notifications, standings

- Fetch NHL standings and surface league/season game counts in the menu bar
- Prefix regular-season rows with the league-wide game number (from gameId)
- New ROUND section shows each active playoff series (matchup, series score,
  next game number + time) derived from /v1/playoff-bracket; rows always open
  the NHL series page so completed series remain clickable
- Goal notifications include scorer sweater, abbreviated name, and strength
  (PPG/SHG/EN), resolved via /v1/gamecenter/{id}/play-by-play
- Drop the per-team filter submenu and NHLTeam enum
- Regenerate AppIcon with the full 10-size macOS set (alpha preserved) so
  notifications render the app icon correctly; rename the iOS marketing PNG
  to icon-ios-1024.png
- gitignore .claude/ local tooling settings

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## April 2026
 
+- Goal notifications now include the scorer's sweater number, name, and strength tag (PPG / SHG / EN) when available (derived from `/gamecenter/{id}/play-by-play`)
+- Regular-season game rows now show the league-wide game number (derived from the NHL gameId)
+- New PLAYOFFS ROUND section lists every active series with series score, next game number, and upcoming tip-off time
+- Playoff bracket fetched from `api-web.nhle.com/v1/playoff-bracket/{year}` only when needed (initial load and after a playoff game finalizes)
+- Removed Team filter option (per-team filtering and team-specific menu bar icon)
 - Initial project setup with macOS menu bar app
 - NHL scoreboard API integration showing yesterday/today/tomorrow games
 - Dynamic polling based on game state (7s live, 10min game day, 1hr idle)