fix: robust capture source detection + diagnostic logging

- desktopCapturer now searches window+screen types with fallbacks
- Partial title match and screen fallback if exact match fails
- Error messages sent back from capture window via IPC
- Detailed logging for capture source selection

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

lib/remote-capture.html

@@ -111,6 +111,7 @@ window.capture.onSignaling((data) => {
     case 'offer':
       handleOffer(data.clientId, data.offer, data.role).catch(err => {
         console.error('Failed to handle offer:', err);
+        window.capture.sendSignaling({ type: 'error', clientId: data.clientId, error: err.message });
       });
       break;
     case 'ice-candidate':

main.js

@@ -1081,11 +1081,19 @@ function buildModifiers(data) {
 
 // IPC: Get capture source ID (desktopCapturer must run in main process in Electron 33+)
 ipcMain.handle('remote:get-capture-source-id', async () => {
-  if (!mainWindow || mainWindow.isDestroyed()) return null;
+  if (!mainWindow || mainWindow.isDestroyed()) {
+    debugLog('remote: capture source - mainWindow not available');
+    return null;
+  }
   const { desktopCapturer } = require('electron');
-  const sources = await desktopCapturer.getSources({ types: ['window'] });
+  const sources = await desktopCapturer.getSources({ types: ['window', 'screen'] });
   const title = mainWindow.getTitle();
-  const source = sources.find(s => s.name === title);
+  debugLog('remote: capture source - looking for title:', title, 'available:', sources.map(s => s.name).join(', '));
+  // Try exact title match first, then partial match, then fall back to first screen
+  let source = sources.find(s => s.name === title);
+  if (!source) source = sources.find(s => s.name.includes('Multi-Hoster'));
+  if (!source) source = sources.find(s => s.id.startsWith('screen:'));
+  debugLog('remote: capture source -', source ? `found: ${source.name} (${source.id})` : 'NONE FOUND');
   return source ? source.id : null;
 });
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "multi-hoster-uploader",
-  "version": "2.1.2",
+  "version": "2.1.3",
   "description": "Upload files to doodstream, voe, vidmoly, byse simultaneously",
   "main": "main.js",
   "scripts": {