Overhaul settings page: clear global vs per-strategy distinction

- Add three visually distinct sections: This Strategy, Map View, Theme Library
- Per-strategy section uses violet accent bar and border for quick recognition
- App-wide sections use muted styling
- Each section has icon + title + subtitle for intuitive understanding
- Compact embedded Active Theme card inside This Strategy
- Export MapThemeActiveThemeCard and MapThemeProfileLibrary for modular use
- Use LucideIcons.settings for settings button (shadcn design system)
- SingleChildScrollView for overflow on smaller viewports

Co-authored-by: Dara Adedeji <SunkenInTime@users.noreply.github.com>
2118eeef7bCursor Agent committed on 3/18/2026, 8:18:00 AMparent9f2bdd9
3 files changedLine totals unavailable