Merge pull request #2 from TheNeikos/claude/fix-screenshare-stream-43ABB

Fix WebRTC stream handling and improve screen share delivery

lanshare/static/index.html

@@ -714,9 +714,17 @@
             console.log(`[${peerId.slice(0,8)}] Received track:`, event.track.kind);
             const peer = state.peers.get(peerId);
             if (peer) {
-                peer.stream = event.streams[0];
+                // Use the associated stream, or build one from the track
+                // (event.streams can be empty in some WebRTC edge cases)
+                if (event.streams[0]) {
+                    peer.stream = event.streams[0];
+                } else if (!peer.stream) {
+                    peer.stream = new MediaStream([event.track]);
+                } else {
+                    peer.stream.addTrack(event.track);
+                }
                 updateUI();
-                
+
                 // Auto-select if this is the first/only stream
                 if (!state.selectedPeerId) {
                     selectPeer(peerId);
@@ -913,13 +921,21 @@
                 stopSharing();
             };
             
-            // Notify server - other peers will send request_stream in response
+            // Notify server
             send({
                 type: 'started_sharing',
                 peer_id: state.peerId,
                 has_audio: stream.getAudioTracks().length > 0,
             });
-            
+
+            // Proactively send offers to all connected peers so they
+            // receive the stream immediately. Without this, we rely on
+            // a request_stream round-trip that can silently fail because
+            // handleSignal is async but never awaited by ws.onmessage.
+            for (const [peerId] of state.peers) {
+                sendOfferTo(peerId);
+            }
+
             updateUI();
         } catch (err) {
             console.error('Error starting screen share:', err);