commit AI suggested performance enhancements

src/ui/dialogs/progress.py

@@ -32,6 +32,7 @@ class CheckThread(QtCore.QThread):
             range(len(self.items)),
             unit_scale=True,
         )
+        swb_client = SWB()
         for i in tqdm_object:
             book: BookData = self.items[i]
             author = (
@@ -43,7 +44,7 @@ class CheckThread(QtCore.QThread):
             # remove trailing punctuation from title
             title = book.title.rstrip(" .:,;!?")
             response: list[BookData] = []
-            response = SWB().getBooks(
+            response = swb_client.getBooks(
                 [
                     "pica.bib=20735",
                     f"pica.tit={title.split(':')[0].strip()}",
@@ -88,4 +89,6 @@ class ProgressDialog(QDialog):
         layout.addWidget(self.start_button)
 
     def start(self):
-        
+        # Start logic is managed externally; keep method for UI wiring
+        pass
+