Attach active screen share to new peers and prompt mic on join gesture

public/app.js

@@ -80,13 +80,12 @@ async function joinVoice(room) {
   S.connecting = true;
   setStatus(`connecting to ${room}…`, 'connecting');
 
-  try {
-    S.iceServers = await fetchIce();
-  } catch {
-    toast('Could not load ICE config from server — using fallback STUN', 'warn');
-  }
+  // Mic permission & AudioContext: request immediately on the user-click gesture
+  // so browsers don't block the microphone permission prompt or audio autoplay policy.
+  if (!S.audioCtx) S.audioCtx = new AudioContext();
+  await S.audioCtx.resume().catch(() => {});
+  orientListener();
 
-  // mic (join anyway without one — listen-only)
   try {
     S.micStream = await navigator.mediaDevices.getUserMedia({
       audio: { echoCancellation: true, noiseSuppression: true, autoGainControl: true },
@@ -99,10 +98,11 @@ async function joinVoice(room) {
   S.muted = false;
   $('#btn-share').disabled = false;
 
-  // audio context must exist after a user gesture — the channel click is one
-  if (!S.audioCtx) S.audioCtx = new AudioContext();
-  await S.audioCtx.resume().catch(() => {});
-  orientListener();
+  try {
+    S.iceServers = await fetchIce();
+  } catch {
+    toast('Could not load ICE config from server — using fallback STUN', 'warn');
+  }
 
   await openSignaling(room);
   S.room = room;
@@ -398,6 +398,15 @@ function ensurePC(peer, initiator) {
     pc.addTransceiver('audio', { direction: 'recvonly' });
   }
 
+  // send my screen share if I am currently sharing when this peer connects
+  if (S.sharing && S.screenStream) {
+    const senders = [];
+    for (const track of S.screenStream.getTracks()) {
+      senders.push(pc.addTrack(track, S.screenStream));
+    }
+    S.screenSenders.set(peer.id, senders);
+  }
+
   if (initiator) pc.onnegotiationneeded();
   return peer;
 }