Add rename workspace functionality (Vibe Kanban) (#1868)

* I've added the rename workspace functionality. Here's a summary of the changes:

## Summary

The backend already had rename workspace support via the `PUT /api/task-attempts/{attemptId}` endpoint with the `name` field. I added the frontend UI to expose this functionality.

### Files Created

1. **`frontend/src/components/ui-new/dialogs/RenameWorkspaceDialog.tsx`**
   - New dialog component for renaming workspaces
   - Shows the current name (or branch name as fallback)
   - Allows user to input a new name
   - Handles mutation with proper error handling and cache invalidation

### Files Modified

1. **`frontend/src/components/ui-new/actions/index.ts`**
   - Added `PencilSimpleIcon` import
   - Added `RenameWorkspaceDialog` import
   - Added new `RenameWorkspace` action that shows the rename dialog

2. **`frontend/src/components/ui-new/actions/pages.ts`**
   - Added `Actions.RenameWorkspace` to the `workspaceActions` page (at the top of the list)

3. **`frontend/src/i18n/locales/en/common.json`**
   - Added translations for the rename workspace dialog under `workspaces.rename`

### How to Use

Users can now rename a workspace by:
1. Clicking the three-dot menu (⋯) on any workspace in the sidebar
2. Selecting "Rename" from the command bar
3. Entering a new name in the dialog
4. Clicking "Rename" to save

* Cleanup script changes for workspace 4eb64331-cc43-43af-849e-3731664e53b9

* Added the missing translations for the rename workspace dialog to all locale files:
- **es** (Spanish)
- **ja** (Japanese)
- **ko** (Korean)
- **zh-Hans** (Simplified Chinese)
- **zh-Hant** (Traditional Chinese)

frontend/src/components/ui-new/actions/index.ts

@@ -29,6 +29,7 @@ import {
   ArrowsClockwiseIcon,
   CrosshairIcon,
   DesktopIcon,
+  PencilSimpleIcon,
 } from '@phosphor-icons/react';
 import { useDiffViewStore } from '@/stores/useDiffViewStore';
 import { useUiPreferencesStore } from '@/stores/useUiPreferencesStore';
@@ -40,6 +41,7 @@ import { workspaceSummaryKeys } from '@/components/ui-new/hooks/useWorkspaces';
 import { ConfirmDialog } from '@/components/ui-new/dialogs/ConfirmDialog';
 import { ChangeTargetDialog } from '@/components/ui-new/dialogs/ChangeTargetDialog';
 import { RebaseDialog } from '@/components/ui-new/dialogs/RebaseDialog';
+import { RenameWorkspaceDialog } from '@/components/ui-new/dialogs/RenameWorkspaceDialog';
 import { CreatePRDialog } from '@/components/dialogs/tasks/CreatePRDialog';
 import { getIdeName } from '@/components/ide/IdeIcon';
 import { EditorSelectionDialog } from '@/components/dialogs/tasks/EditorSelectionDialog';
@@ -191,6 +193,20 @@ export const Actions = {
     },
   },
 
+  RenameWorkspace: {
+    id: 'rename-workspace',
+    label: 'Rename',
+    icon: PencilSimpleIcon,
+    requiresTarget: true,
+    execute: async (ctx, workspaceId) => {
+      const workspace = getWorkspaceFromCache(ctx.queryClient, workspaceId);
+      await RenameWorkspaceDialog.show({
+        workspaceId,
+        currentName: workspace.name || workspace.branch,
+      });
+    },
+  },
+
   PinWorkspace: {
     id: 'pin-workspace',
     label: (workspace?: Workspace) => (workspace?.pinned ? 'Unpin' : 'Pin'),