Add user-configurable colors for transcription display

- Add color settings (user_color, text_color, background_color) to config
- Add color picker buttons in Settings dialog with alpha support for backgrounds
- Update local web display to use configurable colors
- Send per-user colors with transcriptions to multi-user server
- Update Node.js server to apply per-user colors on display page
- Improve server landing page: replace tech details with display options reference
- Bump version to 1.3.2

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

client/server_sync.py

@@ -19,7 +19,10 @@ class ServerSyncClient:
                  font_source: str = "None",
                  websafe_font: Optional[str] = None,
                  google_font: Optional[str] = None,
-                 custom_font_file: Optional[str] = None):
+                 custom_font_file: Optional[str] = None,
+                 user_color: str = "#4CAF50",
+                 text_color: str = "#FFFFFF",
+                 background_color: str = "#000000B3"):
         """
         Initialize server sync client.
 
@@ -33,6 +36,9 @@ class ServerSyncClient:
             websafe_font: Web-safe font name (e.g., "Arial", "Times New Roman")
             google_font: Google Font name (e.g., "Roboto", "Open Sans")
             custom_font_file: Path to a custom font file for this speaker
+            user_color: User name color (hex format)
+            text_color: Text color (hex format)
+            background_color: Background color (hex format with optional alpha)
         """
         self.url = url
         self.room = room
@@ -43,6 +49,9 @@ class ServerSyncClient:
         self.websafe_font = websafe_font
         self.google_font = google_font
         self.custom_font_file = custom_font_file
+        self.user_color = user_color
+        self.text_color = text_color
+        self.background_color = background_color
 
         # Font info to send with transcriptions
         self.font_family: Optional[str] = None
@@ -303,7 +312,11 @@ class ServerSyncClient:
                 'user_name': self.user_name,
                 'text': trans_data['text'],
                 'timestamp': trans_data['timestamp'],
-                'is_preview': trans_data.get('is_preview', False)
+                'is_preview': trans_data.get('is_preview', False),
+                # Always include user's color settings
+                'user_color': self.user_color,
+                'text_color': self.text_color,
+                'background_color': self.background_color
             }
 
             # Add font info if user has a custom font configured