feat(web): fleet settings UI (MS22-P1h) (#617)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/components/settings/FleetSettingsNav.tsx

@@ -0,0 +1,51 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { Card, CardContent } from "@/components/ui/card";
+
+interface FleetSettingsLink {
+  href: string;
+  label: string;
+}
+
+const FLEET_SETTINGS_LINKS: FleetSettingsLink[] = [
+  { href: "/settings/providers", label: "Providers" },
+  { href: "/settings/agent-config", label: "Agent Config" },
+  { href: "/settings/auth", label: "Authentication" },
+];
+
+export function FleetSettingsNav(): React.JSX.Element {
+  const pathname = usePathname();
+
+  return (
+    <Card>
+      <CardContent className="px-4 py-3 flex flex-wrap items-center gap-2">
+        <Link
+          href="/settings"
+          className="inline-flex h-9 items-center rounded-md px-3 text-sm font-medium text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
+        >
+          All Settings
+        </Link>
+
+        {FLEET_SETTINGS_LINKS.map((link) => {
+          const isActive = pathname === link.href;
+
+          return (
+            <Link
+              key={link.href}
+              href={link.href}
+              className={`inline-flex h-9 items-center rounded-md px-3 text-sm font-medium transition-colors ${
+                isActive
+                  ? "bg-primary text-primary-foreground"
+                  : "text-muted-foreground hover:text-foreground hover:bg-muted"
+              }`}
+            >
+              {link.label}
+            </Link>
+          );
+        })}
+      </CardContent>
+    </Card>
+  );
+}