'..' parent row in the file list

Synthetic cursor-navigable first row (hidden at /) — Enter/double-click goes to
the parent like the toolbar button. Excluded from selection, rename, delete,
chmod, and transfers; shown with an up-arrow icon.

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

ui/src/app/file-actions.service.ts

@@ -16,12 +16,12 @@ export class FileActionsService {
   private readonly toast = inject(ToastService);
   private readonly dialogs = inject(DialogsService);
 
-  /** Selection if non-empty, else the cursor entry. */
+  /** Selection if non-empty, else the cursor entry. Never the ".." parent row. */
   targets(panel: PanelState): FileEntry[] {
     const selected = panel.selectedEntries();
     if (selected.length) return selected;
     const atCursor = panel.sorted()[panel.cursor()];
-    return atCursor ? [atCursor] : [];
+    return atCursor && atCursor.name !== '..' ? [atCursor] : [];
   }
 
   mkdir(panel: PanelState): void {
@@ -58,7 +58,7 @@ export class FileActionsService {
 
   rename(panel: PanelState): void {
     const entry = panel.sorted()[panel.cursor()];
-    if (!entry) return;
+    if (!entry || entry.name === '..') return;
     this.dialogs.prompt.set({
       title: `Rename "${entry.name}"`,
       initial: entry.name,