Initial commit: mumh5, a modern Mumble client

Electron desktop app with a Svelte 5 interface for any Mumble server.

- Mumble protocol core: TLS, handshake, channels, users, text, plugin data,
  client-side pacing of Murmur's rate limits
- Voice: WebCodecs Opus over the TCP tunnel, voice activity, push to talk,
  always-on, devices, per-user volume and local mute
- Several servers at once, voice on one; server rail with icons and ordering
- Chat: channels, direct messages, side chat, file sharing through f0ckm,
  inline images without it, click-to-play YouTube
- Profiles with rich descriptions, registration, rename, nicknames,
  connection information and moderation menus
- Identity wizard, multiple identities, PKCS#12 import/export, desktop
  Mumble certificate import, certificate pinning and viewer
- Tray icon with voice state
- Unit, server and end-to-end tests against a real Murmur

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/proto.test.ts

@@ -0,0 +1,26 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { createCodec, FrameReader } from '../src/core/proto.ts';
+
+const codec = createCodec();
+
+test('encode/decode roundtrip with framing split across chunks', () => {
+  const a = codec.encode('TextMessage', { channel_id: [0], message: 'hello <b>world</b>' });
+  const b = codec.encode('Ping', { timestamp: 1790796000000 });
+  const stream = new Uint8Array([...a, ...b]);
+  const reader = new FrameReader();
+  const out: any[] = [];
+  for (let i = 0; i < stream.length; i += 3) {
+    reader.push(stream.subarray(i, i + 3), (id, body) => out.push(codec.decode(id, body)));
+  }
+  assert.equal(out.length, 2);
+  assert.equal(out[0].name, 'TextMessage');
+  assert.equal(out[0].msg.message, 'hello <b>world</b>');
+  assert.deepEqual(out[0].msg.channel_id, [0]);
+  assert.equal(out[1].name, 'Ping');
+  assert.equal(out[1].msg.timestamp, 1790796000000);
+});
+
+test('encode rejects invalid payloads', () => {
+  assert.throws(() => codec.encode('ChannelRemove', { channel_id: 'nope' }));
+});