Update app.py

app.py

@@ -114,7 +114,7 @@ def load_logo_base64(path: str) -> str:
         return base64.b64encode(f.read()).decode("utf-8")
 
 # Preload your Bifröst logo
-LOGO_B64 = load_logo_base64(os.path.join("assets", "bifrost_logo.png"))
+LOGO_B64 = load_logo_base64(os.path.join(APP_DIR, "bifrost_logo.png"))
 
 def render_logo_html(px: int = 96) -> str:
     return f"""