fix document delete last document

src/Controller/Admin/DocumentController.php

@@ -425,6 +425,7 @@ class DocumentController extends AbstractController
         EntityManagerInterface $em,
         IngestJobService       $jobService,
         LockService            $lockService,
+        DocumentService        $documentService
     ): RedirectResponse
     {
         if (!$this->isCsrfTokenValid('delete_document_' . $id, $request->request->get('_token'))) {

src/Vector/VectorIndexBuilder.php

@@ -46,12 +46,35 @@ final class VectorIndexBuilder
     {
         $this->assertPreconditions();
 
+        // --------------------------------------------
+        // 🔵 FALL: NDJSON ist leer → kein Vector Index
+        // --------------------------------------------
+        if (filesize($this->indexNdjsonPath) === 0) {
+
+            // Alten Index entfernen
+            @unlink($this->vectorIndexPath);
+            @unlink($this->vectorMetaPath);
+
+            if ($logPath !== null) {
+                @file_put_contents(
+                    $logPath,
+                    "NDJSON empty → Vector index removed\n",
+                    FILE_APPEND
+                );
+            }
+
+            return; // WICHTIG: kein Python, kein tmp, kein Fehler
+        }
+
+        // --------------------------------------------
+        // 🟢 FALL: NDJSON enthält Chunks
+        // --------------------------------------------
+
         if (!is_file($this->indexMetaPath)) {
             $this->initializeIndexMeta();
         }
 
         $indexMeta = $this->readIndexMeta();
-
         $embeddingModel = $indexMeta['embedding_model'];
 
         $tmpVectorIndexPath = $this->vectorIndexPath . '.tmp';

src/Vector/vector_ingest.py

@@ -80,8 +80,16 @@ with open(index_path, "r", encoding="utf-8") as f:
         ids.append(chunk_id)
 
 if not texts:
-    print("ERROR: No valid chunks found in index.ndjson")
+    print("No chunks found. Removing vector index.")
-    sys.exit(21)
+
+    if out_path.exists():
+        out_path.unlink()
+
+    meta_path = out_path.with_suffix(".meta.json")
+    if meta_path.exists():
+        meta_path.unlink()
+
+    sys.exit(0)
 
 print(f"Loaded {len(texts)} chunks.")