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>

server/nodejs/README.md

@@ -1,15 +1,15 @@
 # Node.js Multi-User Transcription Server
 
-**Much better than PHP for real-time applications!**
+A real-time multi-user transcription sync server for streamers and teams.
 
-## Why Node.js is Better Than PHP for This
+## Features
 
-1. **Native WebSocket Support** - No SSE buffering issues
-2. **Event-Driven** - Designed for real-time connections
-3. **No Buffering Problems** - PHP-FPM/FastCGI buffering is a nightmare
-4. **Lower Latency** - Instant message delivery
-5. **Better Resource Usage** - One process handles all connections
-6. **Easy to Deploy** - Works on any VPS, cloud platform, or even Heroku free tier
+- **Real-time WebSocket** - Instant message delivery (< 100ms latency)
+- **Per-speaker fonts** - Each user can have their own font style
+- **Google Fonts support** - 1000+ free fonts loaded from CDN
+- **Web-safe fonts** - Universal fonts that work everywhere
+- **Custom font uploads** - Upload your own .ttf/.woff2 files
+- **Easy deployment** - Works on any VPS, cloud platform, or locally
 
 ## Quick Start
 
@@ -54,13 +54,35 @@ PORT=8080 npm start
 
 Add a Browser source with this URL:
 ```
-http://your-server.com:3000/display?room=YOUR_ROOM&fade=10&timestamps=true
+http://your-server.com:3000/display?room=YOUR_ROOM&fade=10&timestamps=true&fontsource=websafe&websafefont=Arial
 ```
 
 **Parameters:**
-- `room` - Your room name (required)
-- `fade` - Seconds before text fades (0 = never fade)
-- `timestamps` - Show timestamps (true/false)
+| Parameter | Default | Description |
+|-----------|---------|-------------|
+| `room` | default | Your room name (required) |
+| `fade` | 10 | Seconds before text fades (0 = never fade) |
+| `timestamps` | true | Show timestamps (true/false) |
+| `maxlines` | 50 | Max lines visible (prevents scroll bars) |
+| `fontsize` | 16 | Font size in pixels |
+| `fontsource` | websafe | Font source: `websafe`, `google`, or `custom` |
+| `websafefont` | Arial | Web-safe font name |
+| `googlefont` | Roboto | Google Font name |
+
+**Font Examples:**
+```
+# Web-safe font (works everywhere)
+?room=myroom&fontsource=websafe&websafefont=Courier+New
+
+# Google Font (loaded from CDN)
+?room=myroom&fontsource=google&googlefont=Open+Sans
+
+# Custom font (uploaded by users)
+?room=myroom&fontsource=custom
+```
+
+**Per-Speaker Fonts:**
+Each user can set their own font in the desktop app (Settings → Multi-User Server Sync → Font Source). Per-speaker fonts override the URL defaults, so different speakers can have different fonts on the same display.
 
 ## API Endpoints
 
@@ -74,7 +96,9 @@ Content-Type: application/json
   "passphrase": "my-secret",
   "user_name": "Alice",
   "text": "Hello everyone!",
-  "timestamp": "12:34:56"
+  "timestamp": "12:34:56",
+  "font_family": "Open Sans",    // Optional: per-speaker font
+  "font_type": "google"          // Optional: websafe, google, or custom
 }
 ```
 
@@ -282,17 +306,6 @@ Ports below 1024 require root. Either:
 - Average latency: < 100ms
 - Memory usage: ~50MB
 
-## Comparison: Node.js vs PHP
-
-| Feature | Node.js | PHP (SSE) |
-|---------|---------|-----------|
-| Real-time | ✅ WebSocket | ⚠️ SSE (buffering issues) |
-| Latency | < 100ms | 1-5 seconds (buffering) |
-| Connections | 1000+ | Limited by PHP-FPM |
-| Setup | Easy | Complex (Apache/Nginx config) |
-| Hosting | VPS, Cloud | Shared hosting (problematic) |
-| Resource Usage | Low | High (one PHP process per connection) |
-
 ## License
 
 Part of the Local Transcription project.