fix: serialize WebRTC objects before IPC transfer

RTCSessionDescription and RTCIceCandidate objects lose their properties
when sent through Electron's contextBridge IPC. Convert to plain objects
with explicit property extraction before sending.

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

lib/remote-capture.html

@@ -58,13 +58,18 @@ async function handleOffer(clientId, offer, role) {
     };
   };
 
-  // ICE candidates
+  // ICE candidates — serialize to plain object (WebRTC objects don't survive IPC)
   pc.onicecandidate = (event) => {
     if (event.candidate) {
       window.capture.sendSignaling({
         type: 'ice-candidate',
         clientId,
-        candidate: event.candidate
+        candidate: {
+          candidate: event.candidate.candidate,
+          sdpMid: event.candidate.sdpMid,
+          sdpMLineIndex: event.candidate.sdpMLineIndex,
+          usernameFragment: event.candidate.usernameFragment
+        }
       });
     }
   };
@@ -79,10 +84,11 @@ async function handleOffer(clientId, offer, role) {
   const answer = await pc.createAnswer();
   await pc.setLocalDescription(answer);
 
+  // Serialize to plain object (RTCSessionDescription doesn't survive IPC)
   window.capture.sendSignaling({
     type: 'answer',
     clientId,
-    answer: pc.localDescription
+    answer: { type: pc.localDescription.type, sdp: pc.localDescription.sdp }
   });
 
   window.capture.notifyClientCount(clients.size);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "multi-hoster-uploader",
-  "version": "2.1.3",
+  "version": "2.1.4",
   "description": "Upload files to doodstream, voe, vidmoly, byse simultaneously",
   "main": "main.js",
   "scripts": {