feat: add boards and tasks management endpoints

frontend/src/components/organisms/DashboardSidebar.tsx

@@ -0,0 +1,42 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+
+import { cn } from "@/lib/utils";
+
+export function DashboardSidebar() {
+  const pathname = usePathname();
+
+  return (
+    <aside className="flex h-full flex-col gap-6 rounded-xl border-2 border-gray-200 bg-white p-6 shadow-lush">
+      <div className="space-y-2">
+        <p className="text-xs font-semibold uppercase tracking-[0.3em] text-gray-500">
+          Work
+        </p>
+        <nav className="space-y-1 text-sm">
+          <Link
+            href="/agents"
+            className={cn(
+              "block rounded-lg border border-transparent px-3 py-2 font-medium text-gray-700 hover:border-gray-200 hover:bg-gray-50",
+              pathname.startsWith("/agents") &&
+                "border-gray-200 bg-gray-50 text-gray-900"
+            )}
+          >
+            Agents
+          </Link>
+          <Link
+            href="/boards"
+            className={cn(
+              "block rounded-lg border border-transparent px-3 py-2 font-medium text-gray-700 hover:border-gray-200 hover:bg-gray-50",
+              pathname.startsWith("/boards") &&
+                "border-gray-200 bg-gray-50 text-gray-900"
+            )}
+          >
+            Boards
+          </Link>
+        </nav>
+      </div>
+    </aside>
+  );
+}