Fix: Replace MediaQuery.removePadding with SafeArea to prevent auto-collapse on keyboard

[mdikcinar]

🐛 Bug Fix

Problem:

• SlidingUpPanel was automatically collapsing when keyboard opened
• MediaQuery.removePadding was causing unnecessary didChangeDependencies calls
• Performance issues due to excessive widget rebuilds on MediaQuery changes

Solution:

• Replaced MediaQuery.removePadding with SafeArea(bottom: false)
• Maintains same functionality (removes bottom padding)
• Prevents automatic panel collapse on keyboard events
• Significantly improves performance by reducing MediaQuery-triggered rebuilds

Technical Details:

• MediaQuery.removePadding creates new MediaQuery context that triggers rebuilds
• SafeArea(bottom: false) achieves same padding behavior without MediaQuery dependency
• Fixes keyboard interaction issues in sliding panel components