Fix display user not updating locally until app restart

Engines now read user.name from the config object at transcription time
instead of caching it at init, so name changes take effect immediately.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

client/transcription_engine_realtime.py

@@ -58,8 +58,8 @@ class RealtimeTranscriptionEngine:
         no_log_file: bool = True,
         # Audio device
         input_device_index: Optional[int] = None,
-        # User name
-        user_name: str = ""
+        # App config (for reading user.name at transcription time)
+        app_config=None
     ):
         """
         Initialize RealtimeSTT transcription engine.
@@ -82,7 +82,7 @@ class RealtimeTranscriptionEngine:
             initial_prompt: Optional prompt to guide transcription
             no_log_file: Disable RealtimeSTT logging
             input_device_index: Audio input device index
-            user_name: User name for transcriptions
+            app_config: App Config object for reading user.name dynamically
         """
         self.model = model
         self.language = language
@@ -100,7 +100,7 @@ class RealtimeTranscriptionEngine:
         self.enable_realtime = enable_realtime_transcription
         self.realtime_model = realtime_model
         self.realtime_processing_pause = realtime_processing_pause
-        self.user_name = user_name
+        self.app_config = app_config
 
         # Callbacks
         self.realtime_callback: Optional[Callable[[TranscriptionResult], None]] = None
@@ -162,6 +162,11 @@ class RealtimeTranscriptionEngine:
         self.realtime_callback = realtime_callback
         self.final_callback = final_callback
 
+    def _get_user_name(self) -> str:
+        if self.app_config:
+            return self.app_config.get('user.name', '')
+        return ''
+
     def _on_realtime_transcription(self, text: str):
         """Internal callback for realtime transcriptions."""
         if self.realtime_callback and text.strip():
@@ -169,7 +174,7 @@ class RealtimeTranscriptionEngine:
                 text=text,
                 is_final=False,
                 timestamp=datetime.now(),
-                user_name=self.user_name
+                user_name=self._get_user_name()
             )
             self.realtime_callback(result)
 
@@ -180,7 +185,7 @@ class RealtimeTranscriptionEngine:
                 text=text,
                 is_final=True,
                 timestamp=datetime.now(),
-                user_name=self.user_name
+                user_name=self._get_user_name()
             )
             self.final_callback(result)
 
@@ -406,10 +411,6 @@ class RealtimeTranscriptionEngine:
         if self.is_recording:
             print("VAD settings updated. Restart transcription to apply changes.")
 
-    def set_user_name(self, user_name: str):
-        """Set the user name for transcriptions."""
-        self.user_name = user_name
-
     def __repr__(self) -> str:
         return f"RealtimeTranscriptionEngine(model={self.model}, device={self.device}, running={self.is_recording})"