Add local ADB web remote for Android TV

Node/Express server shells out to adb (connect/pair/keyevent/text/app
launch) and serves a mobile-first installable PWA remote: power, mute,
input switch, volume/channel rockers, D-pad, media transport, text
entry, and one-tap streaming app launch. Supports multiple saved TVs
and the Android 11+ wireless-debugging pairing flow.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RSVyYcrjrbmrMKT85G4fyn

server/test/deviceStore.test.js

@@ -0,0 +1,34 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+test("deviceStore add/list/update/remove roundtrip", async () => {
+  const dir = await mkdtemp(join(tmpdir(), "tv-remote-test-"));
+  process.env.DEVICES_FILE = join(dir, "devices.json");
+
+  // Import fresh so it picks up the env var above.
+  const store = await import(`../src/deviceStore.js?t=${Date.now()}`);
+
+  assert.deepEqual(await store.listSavedDevices(), []);
+
+  const device = await store.addSavedDevice({ name: "Living Room", host: "192.168.1.50" });
+  assert.equal(device.name, "Living Room");
+  assert.ok(device.id);
+
+  let list = await store.listSavedDevices();
+  assert.equal(list.length, 1);
+
+  const updated = await store.updateSavedDevice(device.id, { name: "Lounge" });
+  assert.equal(updated.name, "Lounge");
+
+  const removed = await store.removeSavedDevice(device.id);
+  assert.equal(removed, true);
+
+  list = await store.listSavedDevices();
+  assert.equal(list.length, 0);
+
+  await rm(dir, { recursive: true, force: true });
+  delete process.env.DEVICES_FILE;
+});