fix: reset capture viewport after keyboard navigation

frontend/create-issue-sheet.js

@@ -53,6 +53,8 @@ function createIssueModalLifecycle({ root, background = [], document, requestClo
       active = false;
       backgroundState.forEach(([element, inert]) => { element.inert = inert; });
       backgroundState = [];
+      const panel = root.querySelector('.create-issue-panel');
+      if (panel) panel.scrollTop = 0;
       if (restore && launcher?.isConnected) launcher.focus();
       launcher = null;
     },