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>

config/default_config.yaml

@@ -16,6 +16,7 @@ transcription:
   # Realtime preview settings (optional faster preview before final transcription)
   enable_realtime_transcription: false
   realtime_model: "tiny.en"  # Faster model for instant preview
+  realtime_processing_pause: 0.1  # Seconds between preview updates (lower = more responsive, default 0.1)
 
   # VAD (Voice Activity Detection) settings
   silero_sensitivity: 0.4  # 0.0-1.0, lower = more sensitive (detects more speech)
@@ -35,16 +36,26 @@ transcription:
   # Performance settings
   no_log_file: true  # Disable RealtimeSTT logging
 
+  # Fast speaker mode - for speakers who talk quickly without pauses
+  # Reduces silence detection thresholds for more frequent transcription outputs
+  continuous_mode: false
+
 server_sync:
   enabled: false
   url: "http://localhost:3000/api/send"
   room: "default"
   passphrase: ""
+  # Font settings are now in the display section (shared for local and server sync)
 
 display:
   show_timestamps: true
   max_lines: 100
-  font_family: "Courier"
+  # Font settings (used for both local display and server sync)
+  font_source: "System Font"  # Options: System Font, Web-Safe, Google Font, Custom File
+  font_family: "Courier"  # System font name (local only, won't work with server sync)
+  websafe_font: "Arial"  # Web-safe font name
+  google_font: "Roboto"  # Google Font name
+  custom_font_file: ""  # Path to custom font file (.ttf, .otf, .woff, .woff2)
   font_size: 12
   theme: "dark"
   fade_after_seconds: 10  # Time before transcriptions fade out (0 = never fade)
@@ -52,3 +63,9 @@ display:
 web_server:
   port: 8080
   host: "127.0.0.1"
+
+remote_processing:
+  enabled: false  # Enable remote transcription offloading
+  server_url: ""  # WebSocket URL of remote transcription service (e.g., ws://your-server:8765/ws/transcribe)
+  api_key: ""  # API key for authentication
+  fallback_to_local: true  # Fall back to local processing if remote fails