feat: Auto-detect device name from meshcli prompt

Bridge now detects device name from meshcli prompt ("DeviceName|*")
and exposes it via /health endpoint. mc-webui fetches this at startup
and uses RuntimeConfig for dynamic device name throughout the app.

Fallback chain: prompt detection → .infos command → MC_DEVICE_NAME env var

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

app/routes/api.py

@@ -11,7 +11,7 @@ from datetime import datetime
 from io import BytesIO
 from flask import Blueprint, jsonify, request, send_file
 from app.meshcore import cli, parser
-from app.config import config
+from app.config import config, runtime_config
 from app.archiver import manager as archive_manager
 
 logger = logging.getLogger(__name__)
@@ -209,7 +209,8 @@ def get_status():
         return jsonify({
             'success': True,
             'connected': connected,
-            'device_name': config.MC_DEVICE_NAME,
+            'device_name': runtime_config.get_device_name(),
+            'device_name_source': runtime_config.get_device_name_source(),
             'serial_port': config.MC_SERIAL_PORT,
             'message_count': message_count,
             'latest_message_timestamp': latest_timestamp

app/routes/views.py

@@ -4,7 +4,7 @@ HTML views for mc-webui
 
 import logging
 from flask import Blueprint, render_template, request
-from app.config import config
+from app.config import config, runtime_config
 
 logger = logging.getLogger(__name__)
 
@@ -18,7 +18,7 @@ def index():
     """
     return render_template(
         'index.html',
-        device_name=config.MC_DEVICE_NAME
+        device_name=runtime_config.get_device_name()
     )
 
 
@@ -34,7 +34,7 @@ def direct_messages():
 
     return render_template(
         'dm.html',
-        device_name=config.MC_DEVICE_NAME,
+        device_name=runtime_config.get_device_name(),
         initial_conversation=initial_conversation
     )
 
@@ -46,7 +46,7 @@ def contact_management():
     """
     return render_template(
         'contacts-manage.html',
-        device_name=config.MC_DEVICE_NAME
+        device_name=runtime_config.get_device_name()
     )
 
 
@@ -57,7 +57,7 @@ def contact_pending_list():
     """
     return render_template(
         'contacts-pending.html',
-        device_name=config.MC_DEVICE_NAME
+        device_name=runtime_config.get_device_name()
     )
 
 
@@ -68,7 +68,7 @@ def contact_existing_list():
     """
     return render_template(
         'contacts-existing.html',
-        device_name=config.MC_DEVICE_NAME
+        device_name=runtime_config.get_device_name()
     )
 
 
@@ -81,7 +81,7 @@ def console():
     """
     return render_template(
         'console.html',
-        device_name=config.MC_DEVICE_NAME
+        device_name=runtime_config.get_device_name()
     )