fix(web): review-bot round one + regenerate doc catalogs

- rename same-title no-op moves inside the serialized creation chain
- insertSessionBefore maps only the typed WorkspaceMoveInvalidError to
  workspace-move-invalid; storage failures stay internal
- workspace upsert rejects snapshots older than the installed projection
- flat-mode empty state shows when the query hides the intent row
- intent row no longer forces group expansion; header twist stays live
- group-by menu rides a portal; menu clicks stop propagating to the row
- intent row uses the same single-slot indent in both list modes
- regenerate cordis api/catalog + doc graphs

packages/client/ui-workspace/src/client/WorkspaceBrowser.tsx

@@ -209,7 +209,7 @@ function FlatList({ useSessions, open, query }: Pick<SessionTreeProps, 'useSessi
         {rows.length === 0 && !intentRow && (
           <div className={css.empty}>{query === '' ? 'No sessions yet' : 'No matches'}</div>
         )}
-        {intentRow && <IntentRowItem flat />}
+        {intentRow && <IntentRowItem />}
         {rows.map(node => (
           <SessionNodeItem
             key={node.id}