fix(electron): use proper UTF-8 in screen picker

Replace escaped unicode sequences (\uD83D\uDD0A, \u00e4) with actual
UTF-8 characters so the picker displays 🔊 and ä correctly.

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

electron/package.json

@@ -1,7 +1,7 @@
 {
   "name": "gaming-hub-desktop",
   "productName": "Gaming Hub",
-  "version": "1.8.15",
+  "version": "1.8.16",
   "description": "Gaming Hub Desktop App mit Ad-Blocker",
   "author": "Gaming Hub",
   "main": "main.js",