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>

gui/main_window_qt.py

@@ -373,6 +373,11 @@ class MainWindow(QMainWindow):
             websafe_font = self.config.get('display.websafe_font', 'Arial')
             google_font = self.config.get('display.google_font', 'Roboto')
 
+            # Color settings
+            user_color = self.config.get('display.user_color', '#4CAF50')
+            text_color = self.config.get('display.text_color', '#FFFFFF')
+            background_color = self.config.get('display.background_color', '#000000B3')
+
             # Try up to 5 ports if the default is in use
             ports_to_try = [port] + [port + i for i in range(1, 5)]
             server_started = False
@@ -390,7 +395,10 @@ class MainWindow(QMainWindow):
                     fonts_dir=fonts_dir,
                     font_source=font_source,
                     websafe_font=websafe_font,
-                    google_font=google_font
+                    google_font=google_font,
+                    user_color=user_color,
+                    text_color=text_color,
+                    background_color=background_color
                 )
                 self.web_server_thread = WebServerThread(self.web_server)
                 self.web_server_thread.start()
@@ -643,6 +651,10 @@ class MainWindow(QMainWindow):
             self.web_server.font_source = self.config.get('display.font_source', 'System Font')
             self.web_server.websafe_font = self.config.get('display.websafe_font', 'Arial')
             self.web_server.google_font = self.config.get('display.google_font', 'Roboto')
+            # Update color settings
+            self.web_server.user_color = self.config.get('display.user_color', '#4CAF50')
+            self.web_server.text_color = self.config.get('display.text_color', '#FFFFFF')
+            self.web_server.background_color = self.config.get('display.background_color', '#000000B3')
 
         # Update sync link visibility based on server sync settings
         self._update_sync_link()
@@ -728,6 +740,11 @@ class MainWindow(QMainWindow):
             google_font = self.config.get('display.google_font', '')
             custom_font_file = self.config.get('display.custom_font_file', '')
 
+            # Color settings
+            user_color = self.config.get('display.user_color', '#4CAF50')
+            text_color = self.config.get('display.text_color', '#FFFFFF')
+            background_color = self.config.get('display.background_color', '#000000B3')
+
             if not url:
                 print("Server sync enabled but no URL configured")
                 return
@@ -743,7 +760,10 @@ class MainWindow(QMainWindow):
                 font_source=font_source,
                 websafe_font=websafe_font if websafe_font else None,
                 google_font=google_font if google_font else None,
-                custom_font_file=custom_font_file if custom_font_file else None
+                custom_font_file=custom_font_file if custom_font_file else None,
+                user_color=user_color,
+                text_color=text_color,
+                background_color=background_color
             )
             self.server_sync_client.start()