feat: Phases 4-7 — Full Feature Expansion (26 features)

Phase 4 — New Widget Types:
- Clock/Weather, System Stats, RSS/Feed, Calendar, Markdown,
  Metric/Counter, Link Group, Camera/Stream widgets
- Backend services with caching for each data source
- Full creation form with dynamic config fields per type

Phase 5 — Visual & Styling Enhancements:
- Glassmorphism card style (solid/glass/outline)
- Board-level themes with per-board hue/saturation
- Animated SVG status rings replacing static dots
- Card size options (compact/medium/large)
- Custom CSS injection (admin + per-board, sanitized)
- Wallpaper backgrounds with blur/overlay/parallax

Phase 6 — Functional Features:
- Favorites bar with drag-and-drop reordering
- Recent apps tracking with privacy toggle
- Uptime dashboard page (/status, guest-accessible)
- Notifications system (Discord/Slack/Telegram/HTTP webhooks)
- App tags with filtering in board view
- Multi-URL app cards with expandable sub-links
- Personal API tokens with scoped permissions
- Audit log with retention and admin viewer

Phase 7 — Quality of Life:
- Onboarding wizard (5-step first-launch setup)
- App URL health preview with favicon/title detection
- Board templates (4 built-in + custom import/export)
- Keyboard shortcut overlay (j/k nav, 1-9 boards, ? help)

212 files changed, 15641 insertions, 980 deletions.
Build, lint, type check, and 222 tests all pass.

src/routes/admin/+layout.svelte

@@ -9,6 +9,8 @@
 	const navItems = $derived([
 		{ href: '/admin/users', labelKey: 'admin.users' },
 		{ href: '/admin/groups', labelKey: 'admin.groups' },
+		{ href: '/admin/tags', label: 'Tags' },
+		{ href: '/admin/audit-log', label: 'Audit Log' },
 		{ href: '/admin/settings', labelKey: 'admin.settings' }
 	]);
 
@@ -30,7 +32,7 @@
 							? 'bg-primary text-primary-foreground'
 							: 'text-muted-foreground hover:bg-accent hover:text-foreground'}"
 					>
-						{$t(item.labelKey)}
+						{item.labelKey ? $t(item.labelKey) : item.label}
 					</a>
 				{/each}
 			</div>