feat: revamp HomePageClient and dashboard layout

- Updated HomePageClient to replace Kanban board with a modern dashboard layout.
- Integrated DashboardStats, QuickActions, and RecentTasks components for enhanced user experience.
- Marked several tasks as complete in TODO.md, including the creation of a new dashboard and quick action features.
- Added navigation link for the new dashboard in the Header component.

components/ui/Header.tsx

@@ -40,6 +40,12 @@ export function Header({ title = "TowerControl", subtitle = "Task Management", s
               <Link
                 href="/"
                 className="text-[var(--muted-foreground)] hover:text-[var(--primary)] transition-colors font-mono text-sm uppercase tracking-wider"
+              >
+                Dashboard
+              </Link>
+              <Link
+                href="/kanban"
+                className="text-[var(--muted-foreground)] hover:text-[var(--primary)] transition-colors font-mono text-sm uppercase tracking-wider"
               >
                 Kanban
               </Link>