fix: allow compact mode while media is loading

Checks/system-playback.swift

@@ -48,6 +48,24 @@ struct SystemPlaybackChecks {
         let directory = URL(fileURLWithPath: CommandLine.arguments[1], isDirectory: true)
         let center = MPNowPlayingInfoCenter.default()
         let commands = MPRemoteCommandCenter.shared()
+        let window = NSWindow(contentRect: NSRect(x: -10_000, y: -10_000, width: 640, height: 360),
+                              styleMask: [.titled, .closable, .miniaturizable, .resizable],
+                              backing: .buffered, defer: false)
+        window.isReleasedWhenClosed = false
+        defer { window.close() }
+        model.attachWindow(window)
+        model.open(directory.appendingPathComponent("anamorphic.mp4"))
+        require(model.isBusy && model.perform(.enterCompact) && model.isCompact,
+                "compact entry is available before native media opening acknowledges")
+        until("decoded anamorphic metadata replaces provisional compact geometry") {
+            model.state.status == PLAYER_PLAYING && model.isCompact && !model.compactWindow.isTransitioning &&
+                abs(window.frame.width / window.frame.height - 8.0 / 3.0) < 0.01
+        }
+        model.closeFile()
+        require(!model.isCompact && !model.compactWindow.isTransitioning,
+                "closing loading/loaded media restores immediately")
+        until("anamorphic source closes before the ordinary playback checks") { model.state.status == PLAYER_EMPTY }
+        require(!model.canPerform(.enterCompact), "empty playback does not enable compact entry")
 
         model.open(directory.appendingPathComponent("av.mp4"))
         until("open starts authoritative playback") { model.canTogglePlayback && model.state.status == PLAYER_PLAYING }