Add unified per-speaker font support and remote transcription service

Font changes:
- Consolidate font settings into single Display Settings section
- Support Web-Safe, Google Fonts, and Custom File uploads for both displays
- Fix Google Fonts URL encoding (use + instead of %2B for spaces)
- Fix per-speaker font inline style quote escaping in Node.js display
- Add font debug logging to help diagnose font issues
- Update web server to sync all font settings on settings change
- Remove deprecated PHP server documentation files

New features:
- Add remote transcription service for GPU offloading
- Add instance lock to prevent multiple app instances
- Add version tracking

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

version.py

@@ -0,0 +1,15 @@
+"""Version information for Local Transcription."""
+
+__version__ = "1.2.4"
+__version_info__ = (1, 2, 4)
+
+# Version history:
+# 1.0.0 - Initial release with:
+#   - Real-time speech-to-text transcription using Whisper models
+#   - Local web display for OBS browser source integration
+#   - Multi-user server sync with Node.js backend
+#   - Two-stage transcription (fast preview + refined final)
+#   - Custom font support (local and forwarded to sync server)
+#   - Single instance prevention
+#   - Fast speaker mode for continuous speech
+#   - Remote GPU processing offload support