UI redesign: data-dense professional treatment across entire app

Foundation:
- Rewrote CSS design tokens for light/dark modes (compact density default)
- Added JetBrains Mono for monospace accents on numeric data/timestamps
- Vibrant semantic color palette (tasks=blue, habits=green, projects=purple, notes=amber)
- Removed accent color toggle system, pinned interactive accent blue
- New shell surface tokens (sidebar-bg, sidebar-border, topbar-bg)

Shell:
- Sidebar: colored entity-type icons, always-visible shortcuts, left accent border
- Topbar: reduced to h-10, backdrop blur, monospace search shortcut

Pages (all 12 existing):
- Border treatment (no shadows), hover:bg-muted/20 transitions
- font-mono for all numeric data, timestamps, IDs, status codes
- Tighter spacing (gap-3, space-y-3), text-xl headers

New pages:
- Inbox (/inbox) - focused attention view with overdue/today habits/recent notes
- Reports (/reports) - richer analytics with stat cards, charts, CSV export
- Templates (/templates) - localStorage-based task/note template management

Entity detail pages:
- Consistent border-t pt-3 dividers, monospace timestamps
- Added TagManager to projects (consistency fix)
- Removed Card wrappers from activity/comments (flat sections)

Login: split-layout with branding panel and floating colored dots
Shared components: colored EmptyState icons, monospace error messages
Command palette & shortcuts: new nav items for Inbox/Reports/Analytics
Cleanup: removed all hover:shadow-md and ACCENT_PALETTE references

apps/web/src/hooks/use-keyboard-shortcuts.ts

@@ -34,6 +34,7 @@ export function useKeyboardShortcuts() {
 
     // g+letter navigation sequences
     const navMap: Record<string, string> = {
+      "g i": "/inbox",
       "g d": "/",
       "g t": "/tasks",
       "g h": "/habits",
@@ -41,6 +42,7 @@ export function useKeyboardShortcuts() {
       "g n": "/notes",
       "g c": "/calendar",
       "g g": "/graph",
+      "g r": "/reports",
       "g s": "/settings",
     };