port-layer papercuts for the playtest: #69 Denkou rename, #71 plasma X=minimize, #157 round-end UX (foreground handoff + lastrun clean-exit markers + bat sign-off rewording); tester-facing open-issues handout (docs/) + field-log anatomy notes

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

engine/MUNGA_L4/L4PLASMAWIN.cpp

@@ -25,7 +25,11 @@ static LRESULT CALLBACK
 		return 0;
 
 	case WM_CLOSE:
-		ShowWindow(window, SW_HIDE);	// hide only; the renderer owns it
+		// Minimize, never hide (#71): SW_HIDE left no way back short of a
+		// restart.  A minimized window keeps its taskbar button (both framed
+		// and ,noframe styles), so the player can recover the display.  The
+		// renderer still owns the window either way.
+		ShowWindow(window, SW_MINIMIZE);
 		return 0;
 	}
 	return DefWindowProcW(window, message, wparam, lparam);