fix(indexer): recover cleanly from indexing failures

Move sqlite-vec embedding deletions outside the image transaction to avoid transactional virtual-table failures. Emit a terminal indexing progress event on errors so the frontend reloads partial state and clears its active scan state.

src-tauri/src/db.rs

@@ -901,10 +901,14 @@ pub fn get_folder_media_index(conn: &Connection, folder_id: i64) -> Result<Vec<I
 }
 
 pub fn delete_images_by_ids(conn: &Connection, image_ids: &[i64]) -> Result<()> {
+    // Delete from sqlite-vec virtual tables outside the transaction — sqlite-vec
+    // has known issues with transactional DML in early versions.
+    for image_id in image_ids {
+        vector::delete_embedding(conn, *image_id)?;
+        vector::delete_caption_embedding(conn, *image_id)?;
+    }
     let tx = conn.unchecked_transaction()?;
     for image_id in image_ids {
-        vector::delete_embedding(&tx, *image_id)?;
-        vector::delete_caption_embedding(&tx, *image_id)?;
         tx.execute("DELETE FROM images WHERE id = ?1", [image_id])?;
     }
     tx.commit()?;

src-tauri/src/indexer.rs

@@ -150,8 +150,19 @@ pub fn index_folder(app: AppHandle, pool: DbPool, folder_id: i64, folder_path: P
         let storage_profile = detect_storage_profile(&folder_path);
         set_folder_storage_profile(folder_id, RuntimeAdaptiveProfile::new(storage_profile));
         set_folder_indexing_state(folder_id, true);
-        if let Err(error) = do_index(app, pool, folder_id, folder_path) {
-            eprintln!("Indexing error: {}", error);
+        if let Err(error) = do_index(app.clone(), pool, folder_id, folder_path) {
+            eprintln!("Indexing error for folder {}: {}", folder_id, error);
+            // Always emit done so the frontend reloads and recovers from partial state.
+            emit_progress(
+                &app,
+                &IndexProgress {
+                    folder_id,
+                    total: 0,
+                    indexed: 0,
+                    current_file: String::new(),
+                    done: true,
+                },
+            );
         }
         set_folder_indexing_state(folder_id, false);
     });