Rebake team logos at 72×72 for crisp notification thumbnails

The notification thumbnail's native display size is ~48 physical pixels
(measured empirically with a size-ladder test attached via the dev menu).
Shipping logos at 512×342 forced macOS to downsample ~10×, which is what
was producing the blurry/aliased team logos in banner thumbnails.

- Pre-render logos at 72×72 (1.5× over native; stays sharp, gives a little
  extra detail for retina displays without triggering aliasing)
- Trim transparent margins before fitting: NHL brand SVGs pad their
  viewBox generously, so the actual logo was only ~60% of the bundled
  image. square_logo.swift now scans the alpha channel, crops to the
  tight bounding box, then fits aspect-preserved into the 72×72 canvas.
- Drop the 32 unused TeamLogo_*.imageset asset-catalog entries (dead code
  since the team-filter feature was removed); notifications load PNGs
  from the filesystem bundle subdir
- Move TeamLogos/ → Resources/TeamLogos/ and update project.yml source
  paths; excludes: on the recursive scan prevents duplicate flat copies
  that were bloating the bundle
- Simplify NotificationManager: drop SVG fallback (macOS doesn't accept
  SVG attachments) and content-hash identifier experiments; back to the
  minimal working config
- Dev menu: add "Thumbnail Size Test" which fires a ladder of 10 test
  notifications (16…128px) for future sizing verification
- Fire a test game-start notification on startup in DEBUG builds so the
  dev loop doesn't require clicking through the menu after each launch
- Scripts/square_logo.swift: alpha-bbox trim + aspect-preserved fit

IceGlass/Services/MainService.swift

@@ -155,10 +155,19 @@ class MainService: @unchecked Sendable {
                 self.allGamesByDate = filtered
                 self.updateSnapshots(from: filtered)
 
+                let wasFirstFetch = self.isFirstFetch
                 if self.isFirstFetch {
                     self.isFirstFetch = false
                 }
 
+#if DEBUG
+                // Fire a test game-start notification on startup so the dev
+                // loop doesn't require clicking through the menu each time.
+                if wasFirstFetch, let game = filtered.flatMap(\.games).first {
+                    self.notificationManager.notifyGameStarted(game, bypassDedup: true)
+                }
+#endif
+
                 self.logger.info("Scoreboard updated: \(filtered.map { "\($0.date): \($0.games.count) games" }.joined(separator: ", "))")
 
                 let interval = self.bestPollingInterval