feat: add favicon to Castbox web interface using relative path lookup

src/auracast/server/multicast_frontend.py

@@ -1,11 +1,14 @@
 # frontend/app.py
 import os
 import time
-import streamlit as st
-import requests
-from auracast import auracast_config
 import logging as log
+from PIL import Image
+
+import requests
 from dotenv import load_dotenv
+import streamlit as st
+
+from auracast import auracast_config
 from auracast.utils.frontend_auth import (
     is_pw_disabled,
     load_pw_record,
@@ -15,7 +18,11 @@ from auracast.utils.frontend_auth import (
 )
 
 # Set page configuration (tab title and icon) before using other Streamlit APIs
-st.set_page_config(page_title="Castbox", page_icon="", layout="centered")
+# Always use the favicon from the utils folder relative to this file
+_THIS_DIR = os.path.dirname(__file__)
+_FAVICON_PATH = os.path.abspath(os.path.join(_THIS_DIR, '..', 'utils', 'favicon.ico'))
+favicon = Image.open(_FAVICON_PATH)
+st.set_page_config(page_title="Castbox", page_icon=favicon, layout="centered")
 
 # Load environment variables from a .env file if present
 load_dotenv()