feat: Phase 9 — Web client SPA with WebRTC P2P transport

Complete browser-based client: Preact SPA with login, group file browser,
encrypted download, video playback, group chat, i18n, and dark/light theme.
Browser connects P2P to nodes behind residential NAT via WebRTC DataChannel
(aiortc). Hub handles signaling only — all data flows E2E.

Performance: pipelined downloads (8-chunk sliding window), binary msgpack
wire format (no base64), redundant I/O elimination. Large file downloads
stream to disk via File System Access API (showSaveFilePicker).

Validated on SFR + Orange residential NATs, Chrome + Firefox, IPv4/IPv6.
132 tests passing. Deployed to meshbay.org + Orange node.

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

1 files changed, 13 insertions, 6 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/webrtc-test.html b/packages/meshbay-hub/src/meshbay_hub/static/webrtc-test.html
index 0d5750b..46003a7 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/webrtc-test.html
+++ b/packages/meshbay-hub/src/meshbay_hub/static/webrtc-test.html
@@ -68,7 +68,7 @@
   <div id="log"></div>
 </div>
 
-<script src="/transport.js"></script>
+<script src="/transport.js?v=2"></script>
 <script>
 const HUB_URL = window.location.origin;
 const params = new URLSearchParams(window.location.search);
@@ -76,13 +76,14 @@ let accessToken = null;
 let jwtToken = null;
 let transport = null;
 let fileIndex = null;
+let connecting = false;
 
 // Pre-fill from URL params
 if (params.get('user')) document.getElementById('username').value = params.get('user');
 if (params.get('pass')) document.getElementById('password').value = params.get('pass');
 if (params.get('node')) document.getElementById('node-id').value = params.get('node');
 if (params.get('group')) document.getElementById('group-id').value = params.get('group');
-if (params.get('file')) document.getElementById('file-id').value = params.get('file');
+if (params.get('file')) document.getElementById('file-id').value = params.get('file').replace(/\s+/g, '');
 
 // Auto-run if all params provided
 if (params.get('auto')) {
@@ -143,10 +144,14 @@ async function doLogin() {
 }
 
 async function doConnect() {
+  if (connecting) { logMsg('warn', 'Connect already in progress'); return; }
   const nodeId = document.getElementById('node-id').value;
   const groupId = document.getElementById('group-id').value;
   if (!nodeId) { logMsg('warn', 'Enter a node ID'); return; }
 
+  connecting = true;
+  if (transport) { transport.close(); transport = null; }
+
   logMsg('info', `Connecting to node ${nodeId.substring(0, 8)}... via WebRTC`);
   setStep('step-connect', 'active');
 
@@ -164,7 +169,7 @@ async function doConnect() {
 
     logMsg('ok', `WebRTC connected in ${elapsed}ms`);
     logMsg('ok', `  MNP handshake_ack — node_pk: ${ack.node_pk?.substring(0, 16)}...`);
-    logMsg('ok', `  DataChannel: open, ordered, reliable`);
+    logMsg('ok', `  DataChannel state: ${transport._channel?.readyState}`);
     setStep('step-connect', 'done');
     document.getElementById('connect-status').innerHTML = '<span class="badge">P2P OK</span>';
     document.getElementById('btn-index').disabled = false;
@@ -173,11 +178,13 @@ async function doConnect() {
     logMsg('err', `Connection FAILED: ${e.message}`);
     setStep('step-connect', 'fail');
     document.getElementById('connect-status').innerHTML = '<span class="badge fail">FAIL</span>';
+  } finally {
+    connecting = false;
   }
 }
 
 async function doFetchIndex() {
-  logMsg('info', 'Fetching Mesh Group Index via DataChannel...');
+  logMsg('info', `Fetching Mesh Group Index... (channel: ${transport?._channel?.readyState})`);
   try {
     const t0 = performance.now();
     const indexBytes = await transport.fetchIndex();
@@ -210,7 +217,7 @@ async function doFetchIndex() {
 }
 
 async function doFetchChunk() {
-  let fileId = document.getElementById('file-id').value.trim();
+  let fileId = document.getElementById('file-id').value.replace(/\s+/g, '');
 
   if (!fileId) {
     logMsg('warn', 'Enter a file_id (blake3 hex hash from node indexer log)');
@@ -219,7 +226,7 @@ async function doFetchChunk() {
     return;
   }
 
-  logMsg('info', `Fetching chunk 0 of file ${fileId.substring(0, 16)}... via DataChannel...`);
+  logMsg('info', `Fetching chunk 0 of ${fileId.substring(0, 16)}... (channel: ${transport?._channel?.readyState})`);
 
   try {
     const t0 = performance.now();