fix(jira-knowledge): save config before sync to prevent stale base URL error

_trigger_sync reads jira config from self.ctx.config.data, but if the
user hasn't clicked Save yet the config still holds old/empty values.
Add self._save() at the top of _trigger_sync so the current form
values (base URL, email, token, project mapping) are persisted to
config before the background sync job reads them.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

ui/connectors_panel.py

@@ -235,6 +235,9 @@ class JiraConnectDialog(QDialog):
 
     def _trigger_sync(self) -> None:
         """Trigger a background sync job using JiraSyncService."""
+        # Save current form values to config before syncing — otherwise the
+        # sync job reads stale/empty config if the user hasn't clicked Save yet.
+        self._save()
         self.sync_status.setText(tr("connectors.jira_kb_syncing"))
         self.sync_btn.setEnabled(False)