feat(api): expose unifiOs widget summary query through tRPC router and request handler

Create unifiOs request handler with 60s cache and stale-on-error fallback, and tRPC router exposing clientApi.widget.unifiOs.summary query. Include minimal widget stub for type system.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/widgets/src/unifi-os/component.tsx

@@ -0,0 +1,7 @@
+"use client";
+
+import type { WidgetComponentProps } from "../definition";
+
+export default function UnifiOsWidgetComponent({ integrationIds }: WidgetComponentProps<"unifiOs">) {
+  return <div>UniFi OS Widget</div>;
+}

packages/widgets/src/unifi-os/index.ts

@@ -0,0 +1,12 @@
+import { IconWifi } from "@tabler/icons-react";
+
+import { createWidgetDefinition } from "../definition";
+import { optionsBuilder } from "../options";
+
+export const { definition, componentLoader } = createWidgetDefinition("unifiOs", {
+  icon: IconWifi,
+  createOptions() {
+    return optionsBuilder.from((factory) => ({}));
+  },
+  supportedIntegrations: ["unifiOs"],
+}).withDynamicImport(() => import("./component"));