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>

client/config.py

@@ -19,6 +19,10 @@ class Config:
         self.app_dir = Path.home() / ".local-transcription"
         self.app_dir.mkdir(parents=True, exist_ok=True)
 
+        # Fonts directory for custom font files
+        self.fonts_dir = self.app_dir / "fonts"
+        self.fonts_dir.mkdir(parents=True, exist_ok=True)
+
         if config_path is None:
             self.config_path = self.app_dir / "config.yaml"
         else:
@@ -34,7 +38,7 @@ class Config:
                 self.config = yaml.safe_load(f) or {}
         else:
             # Load default configuration
-            default_config_path = Path(__file__).parent.parent / "config" / "default_config.yaml"
+            default_config_path = Path(__file__).resolve().parent.parent / "config" / "default_config.yaml"
             if default_config_path.exists():
                 with open(default_config_path, 'r') as f:
                     self.config = yaml.safe_load(f) or {}
@@ -137,5 +141,24 @@ class Config:
         self.config = self._get_default_config()
         self.save()
 
+    def get_custom_fonts(self) -> list:
+        """
+        Get list of custom font files in the fonts directory.
+
+        Returns:
+            List of (font_name, font_path) tuples
+        """
+        fonts = []
+        font_extensions = {'.ttf', '.otf', '.woff', '.woff2'}
+
+        if self.fonts_dir.exists():
+            for font_file in self.fonts_dir.iterdir():
+                if font_file.suffix.lower() in font_extensions:
+                    # Use filename without extension as font name
+                    font_name = font_file.stem
+                    fonts.append((font_name, font_file))
+
+        return sorted(fonts, key=lambda x: x[0].lower())
+
     def __repr__(self) -> str:
         return f"Config(path={self.config_path})"