Remove queue sidebar tab (#6724)

## Summary
- drop the queue sidebar entry, its component, and the supporting
composable so only the overlay-based queue UI remains
- clean up the related tests and keybindings so nothing references the
removed tab
- prune the unused queue task card components to keep the repo tidy
- remove unused queue sidebar translations and command strings across
all locales

## Testing
- pnpm typecheck
- pnpm lint:fix

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6724-Remove-queue-sidebar-tab-2ae6d73d3650811db0d4c5ad4c5ffc8d)
by [Unito](https://www.unito.io)

---------

Co-authored-by: pythongosssss <125205205+pythongosssss@users.noreply.github.com>
Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: Jin Yi <jin12cc@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: Johnpaul Chiwetelu <49923152+Myestery@users.noreply.github.com>
Co-authored-by: Christian Byrne <cbyrne@comfy.org>
Co-authored-by: Comfy Org PR Bot <snomiao+comfy-pr@gmail.com>
Co-authored-by: christian-byrne <72887196+christian-byrne@users.noreply.github.com>

src/locales/ja/main.json

@@ -1670,18 +1670,6 @@
     },
     "openWorkflow": "ローカルでワークフローを開く",
     "queue": "キュー",
-    "queueTab": {
-      "backToAllTasks": "すべてのタスクに戻る",
-      "clearPendingTasks": "保留中のタスクをクリア",
-      "containImagePreview": "画像プレビューを含める",
-      "coverImagePreview": "画像プレビューに合わせる",
-      "filter": "出力をフィルタ",
-      "filters": {
-        "hideCached": "キャッシュを非表示",
-        "hideCanceled": "キャンセル済みを非表示"
-      },
-      "showFlatList": "フラットリストを表示"
-    },
     "templates": "テンプレート",
     "themeToggle": "テーマを切り替え",
     "workflowTab": {