Replaces simple metric cards with the design's rich two-row bento grid:
- Row 1: Today (active tasks), Waiting on you (quick-approve), Monthly budget
- Row 2: In progress work, Team roster, Quarter goal (dark card with progress bar)
Personalized greeting based on time of day. All data bound to real snapshot.
- Add search bar with ⌘K hint between org logo and nav in sidebar
- Move Settings nav item to bottom section above sidebar footer
- Fix minimize button icon from MoreHorizontal to Minus on non-macOS
- Replace work/social nav icons with design-spec custom SVG paths
- Add --r-xl and --shadow-md CSS tokens from design system
- Set letter-spacing -0.005em and font-feature-settings on body