Replaces all references to hohoho.mp3 with notification.mp3 for notification sounds across the app. Moves AudioPreloader to layout component and removes duplicate usage. Adds a guard in BroadcastDialog to prevent duplicate sends.
Christmas decorations and theme logic have been disabled throughout the app, including the isDecember utility, layout, and related imports. Layout now shows a skeleton UI while mounting to prevent layout shift. Minor improvements to RevenueChart tooltip colors and ChatDetail request headers for better consistency.
Added an AudioPreloader React component to preload the /hohoho.mp3 audio file for notifications, and included it in the app layout. Also updated _document.tsx to add a preload link for the audio file. Added yt-dlp.exe binary to the repository.
