fix: WebDAV in Backup-Tab, mkdirp robuster, Sync-Fehler blockieren keine Uploads

backend/src/routes/admin.js

@@ -263,7 +263,7 @@ router.post('/webdav/sync', authenticate, requireAdmin, async (req, res) => {
 
     // User-Basisordner
     try { await webdav.mkdirp(userBase); results.folders++; } catch(e) {
-      results.errors.push(`Ordner ${userBase}: ${e.message}`);
+      console.warn('[sync] mkdirp', userBase, e.message);
     }
 
     // Upload-Freigabe Ordner

backend/src/tools/dateien/webdav.js

@@ -77,8 +77,10 @@ async function mkdirp(davPath) {
   for (const part of parts) {
     current += '/' + part;
     const r = await davRequest('MKCOL', current);
-    if (r.status !== 201 && r.status !== 405) { // 405 = schon vorhanden
-      throw new Error(`MKCOL ${current} → ${r.status}`);
+    // 201 = erstellt, 301/405/409/423 = schon vorhanden oder Konflikt (ignorieren)
+    const ok = [201, 301, 405, 409, 423].includes(r.status);
+    if (!ok) {
+      console.warn(`[webdav mkdirp] MKCOL ${current} → ${r.status} (ignoriert)`);
     }
   }
 }
@@ -97,7 +99,9 @@ function userPath(cfg, username) {
  * @param {string} mimeType
  */
 async function uploadFile(buffer, davPath, mimeType = 'application/octet-stream') {
-  await mkdirp(davPath.split('/').slice(0, -1).join('/'));
+  try { await mkdirp(davPath.split('/').slice(0, -1).join('/')); } catch(e) {
+    console.warn('[webdav] mkdirp warning:', e.message);
+  }
   const r = await new Promise((resolve, reject) => {
     const cfg = getConfig();
     const base = new URL(cfg.url);

frontend/src/App.jsx

@@ -2991,9 +2991,6 @@ function AdminPanel({ toast, mobile, user, nav }) {
           <Sec title="TMDB API (KINO-FEATURE)">
             <TmdbSettings toast={toast}/>
           </Sec>
-          <Sec title="SYNOLOGY NAS / WEBDAV">
-            <WebDavSettings toast={toast}/>
-          </Sec>
         </div>
       )}
 
@@ -3031,6 +3028,9 @@ function AdminPanel({ toast, mobile, user, nav }) {
             </div>
             {file && <div style={{ color:'rgba(255,255,255,0.55)', fontSize:10, fontFamily:'monospace', marginTop:5 }}>{file.name}</div>}
           </Sec>
+          <Sec title="SYNOLOGY NAS / WEBDAV">
+            <WebDavSettings toast={toast}/>
+          </Sec>
         </div>
       )}
     </div>