Add v1.6 App Store screenshot planning and tasks

Update file size claims from 2MB to 2.2MB for accuracy

Remove all remaining emoji from App Store content file

Update App Store content for v1.6 release

Add statistics tab info to v1.6 release notes

Mark Idea-23 as completed

Fix App Store release notes and create Common-Mistakes reference

Release v1.6: Achievement system with smart migration

Fix date formatting and improve chart tooltips

Add achievements system with notifications and statistics chart hover tooltips

Add some new files.

Update App Store content for v1.5 release

Update VSCode Swift SDK configuration

Add v1.5 App Store screenshot templates

Release v1.5: Statistics Export & Professional Reports