aesthetic-improvements: apply design direction to pages batch 3 (Action 11.5.1.5)
- Pages: Updated remaining spacing issues (p-6 → p-8, space-y-6 → space-y-8, gap-6 → gap-8)
- DashboardPage, DeveloperPage, GearPage, DesignSystemDemoPage, MarketplaceHome
- Views: Updated spacing (space-y-6 → space-y-8, gap-6 → gap-8, p-6 → p-8)
- FileManagerView, NotificationsView, SocialView, FileDetailsView, UploadView, MarketplaceView, GearView, LiveView, ProfileView
- Action 11.5.1.5: Apply direction to all pages - Batch 3 complete (5 pages + 9 views = 14 files)