Description

This PR improves settings layout hierarchy, implements edge-to-edge rendering, and other general improvements.

Key highlights include:

• Edge-to-Edge Display: Enabled full edge-to-edge rendering to make system bars transparent and content draw behind them ([Feature Request]: Implement edge-to-edge display (full-screen layout) #35).
• Settings & Theme Groups: Grouped general/appearance settings with similar tiles and optimized initial app launch theme.
• Visual Contrast: Added a red error tint to the "Delete All Journals" action button to alert users to destructive operations (Suggestion: Error tint to "Delete All Journals" button #41).
• Timeline Journal tile Refinements: Hidden the "Untitled" title label for entries with no title, keeping list items clean and maintaining consistent item heights (Enhancement: Hide “Untitled” label in Calendar View for entries without a title #44).
• Timeline Map Refinements: Improved layout, moved attributions, fixed reloading indicator and colors.

resolves #44
resolves #41
resolves #35