Improved post composer, resizing & platform details

The post composer has been refined with better resizing behavior and a new minimize option, making drafting and editing posts smoother. We also fixed issues with post reviews and added more detailed platform/cross-posting info so your content posts more reliably across destinations.

• Composer improvements: smoother UX and a minimize option for less screen clutter
• Resizing fixes and adjustments to keep editor layout stable across sizes
• Post review bug fixes and added advanced platform/cross-post details for more reliable publishing