feat: scheduled messages — schedule_reminder, send_later, list_scheduled, cancel_scheduled

- Broker: schedule/list_scheduled/cancel_scheduled WS message types + in-memory delivery
- Client: scheduleMessage(), listScheduled(), cancelScheduled() with resolver Map pattern
- MCP: schedule_reminder, send_later, list_scheduled, cancel_scheduled tools
- CLI: claudemesh remind <msg> --in 2h | --at 15:00 | list | cancel <id>
- Types: WSScheduleMessage, WSScheduledAckMessage, WSScheduledListMessage, WSCancelScheduledAckMessage

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/cli/src/commands/connect.ts

@@ -0,0 +1,59 @@
+/**
+ * Short-lived WS connection helper for CLI commands (peers, send, inbox, state).
+ *
+ * Opens a connection to one mesh, runs a callback, then closes cleanly.
+ * The caller never deals with connect/close lifecycle.
+ */
+
+import { hostname } from "node:os";
+import { BrokerClient } from "../ws/client";
+import { loadConfig } from "../state/config";
+import type { JoinedMesh } from "../state/config";
+
+export interface ConnectOpts {
+  /** Mesh slug to connect to. Auto-selects if only one mesh joined. */
+  meshSlug?: string | null;
+  /** Display name for this session. Defaults to hostname-pid. */
+  displayName?: string;
+}
+
+export async function withMesh<T>(
+  opts: ConnectOpts,
+  fn: (client: BrokerClient, mesh: JoinedMesh) => Promise<T>,
+): Promise<T> {
+  const config = loadConfig();
+  if (config.meshes.length === 0) {
+    console.error("No meshes joined. Run `claudemesh join <url>` first.");
+    process.exit(1);
+  }
+
+  let mesh: JoinedMesh;
+  if (opts.meshSlug) {
+    const found = config.meshes.find((m) => m.slug === opts.meshSlug);
+    if (!found) {
+      console.error(
+        `Mesh "${opts.meshSlug}" not found. Joined: ${config.meshes.map((m) => m.slug).join(", ")}`,
+      );
+      process.exit(1);
+    }
+    mesh = found;
+  } else if (config.meshes.length === 1) {
+    mesh = config.meshes[0]!;
+  } else {
+    console.error(
+      `Multiple meshes joined. Specify one with --mesh <slug>.\nJoined: ${config.meshes.map((m) => m.slug).join(", ")}`,
+    );
+    process.exit(1);
+  }
+
+  const displayName = opts.displayName ?? config.displayName ?? `${hostname()}-${process.pid}`;
+  const client = new BrokerClient(mesh, { displayName });
+
+  try {
+    await client.connect();
+    const result = await fn(client, mesh);
+    return result;
+  } finally {
+    client.close();
+  }
+}