fix

backend/app/migrations/init_db.py

@@ -52,6 +52,8 @@ DEFAULT_SETTINGS = [
     ("embedding.model", settings.default_embedding_model, "Embedding model name (e.g. text-embedding-3-small, bge-m3, nomic-embed-text)"),
     ("embedding.dim", settings.default_embedding_dim, "Vector dimension. 0 = auto-probe from endpoint on first use"),
     ("embedding.request_timeout", settings.default_embedding_request_timeout, "Embeddings request timeout, seconds"),
+    # UI customization
+    ("ui.logo_url", "/logo.png", "Logo image URL or path shown in navbar, home page, and favicon. Use a URL (https://...), an absolute path (/logo.png), or a data: URI. Default is the bundled Mikan logo."),
 ]