Add config UI for webdav uploader

daemon/src/main.rs

@@ -288,12 +288,12 @@ async fn run_with_config(
         wifi_status.clone(),
     );
 
-    if let Some(webdav_config) = config.webdav.clone() {
+    if !config.webdav.url.trim().is_empty() {
         run_webdav_upload_worker(
             &task_tracker,
             shutdown_token.clone(),
             qmdl_store_lock.clone(),
-            webdav_config.into(),
+            config.webdav.clone().into(),
         );
     }