feat: add star feature for tasks to prevent accidental deletion

[roomote]

Summary

This PR implements a star feature for tasks as requested in #6244. Users can now star important tasks to keep them at the top of the list and prevent accidental deletion.

Changes

• ✨ Added a star button to each task item in the history view
• 📌 Starred tasks are always sorted to the top of the task list
• 🛡️ Starred tasks cannot be deleted (shows a warning message instead)
• 🚫 Batch delete operations automatically exclude starred tasks
• 🌐 Added localization support for all star-related messages

Implementation Details

1. Data Model: Added an optional starred field to the HistoryItem type
2. UI Components: Created a new StarButton component with proper styling and tooltips
3. State Management: Implemented toggle functionality through the webview message handler
4. Sorting Logic: Modified the task search hook to always sort starred items to the top
5. Delete Protection: Updated both single and batch delete dialogs to handle starred tasks

Testing

• ✅ TypeScript compilation passes
• ✅ ESLint checks pass
• ✅ All existing tests continue to pass

Screenshots

The star button appears on hover and shows the current starred state:

• Empty star icon for unstarred tasks
• Filled star icon (yellow) for starred tasks

Fixes #6244

---

Important

Add star feature to tasks, allowing users to prioritize and protect tasks from deletion, with updates to data models, UI components, and state management.

• Behavior:
  • Added star button to tasks in history view, allowing users to star/unstar tasks.
  • Starred tasks are sorted to the top and cannot be deleted, showing a warning instead.
  • Batch delete operations exclude starred tasks.
• Data Model:
  • Added starred field to HistoryItem type in history.ts.
• UI Components:
  • Added StarButton component for toggling star state.
  • Updated BatchDeleteTaskDialog.tsx and DeleteTaskDialog.tsx to handle starred tasks.
  • Modified TaskItemHeader.tsx to include StarButton.
• State Management:
  • Implemented star toggle functionality in webviewMessageHandler.ts.
  • Updated task sorting logic in useTaskSearch.ts to prioritize starred tasks.
• Localization:
  • Added star-related messages to history.json.

^{This description was created by for 67b29f2. You can customize this summary. It will automatically update as commits are pushed.}

[ellipsis-dev]

Typographical note: The label "Star task" has inconsistent capitalization compared to similar entries (e.g. "Export Task", "Delete Task"). Consider changing it to "Star Task" for consistency.

Suggested change

	"starTask": "Star task",
	"starTask": "Star Task",

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[ellipsis-dev]

Typographical note: The label "Unstar task" has inconsistent capitalization compared to similar entries (e.g. "Export Task", "Delete Task"). Consider changing it to "Unstar Task" for consistency.

Suggested change

	"unstarTask": "Unstar task",
	"unstarTask": "Unstar Task",

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[daniel-lxs]

Closing for now as the issue needs approval and proper scoping

[daniel-lxs]

Closing for now as the issue needs approval and proper scoping