[feat] add CrossDesk MCP with remote desktop panels

apps/mcp/src/ui-actions.ts

@@ -0,0 +1,46 @@
+import { z } from "zod";
+import { parse, uiConnect, Failure, type Data } from "./common.js";
+import { Sessions, type View } from "./sessions.js";
+
+export const uiSchemas = {
+  ready: z.strictObject({}),
+  devices: z.strictObject({}),
+  status: z.strictObject({}),
+  connect: uiConnect,
+  video_open: z.strictObject({}),
+  control: z.strictObject({
+    operation: z.enum(["pause", "resume", "disconnect"]),
+  }),
+};
+export type UIAction = keyof typeof uiSchemas;
+export async function uiAction(
+  sessions: Sessions,
+  view: View,
+  name: string,
+  args: unknown,
+  signal?: AbortSignal,
+): Promise<Data> {
+  if (!Object.hasOwn(uiSchemas, name)) throw new Failure("UNKNOWN_ACTION");
+  const p = parse(uiSchemas[name as UIAction], args) as Data;
+  view.lastSeen = Date.now();
+  switch (name) {
+    case "ready":
+      view.ready = true;
+      return sessions.describe(view);
+    case "devices": {
+      const config = await sessions.store.config();
+      return {
+        devices: await sessions.store.list(),
+        defaults: { server: config.server, port: config.port },
+      };
+    }
+    case "status":
+      return sessions.status(undefined, view.id);
+    case "connect":
+      return sessions.connectUI(view, p, signal);
+    case "control":
+      return sessions.viewerControl(view, p.operation);
+    default:
+      throw new Failure("UNKNOWN_ACTION");
+  }
+}