refactor: extract setTaskTitle handler to separate module

[roomote]

Related GitHub Issue

Depends on: #8689 (should be merged after #8689)

Description

This PR extracts the setTaskTitle message handler logic from webviewMessageHandler.ts into a dedicated module (taskTitleHandler.ts), improving code organization and maintainability.

Changes:

• Created src/core/webview/taskTitleHandler.ts with the extracted handler logic
• Updated webviewMessageHandler.ts to use the extracted handler
• Removed unused HistoryItem import from webviewMessageHandler.ts
• Added a helper normalizeTitle() function for cleaner title normalization

Benefits:

• Reduces the size of the already large webviewMessageHandler.ts file
• Follows the existing pattern of other handlers (e.g., checkpointRestoreHandler.ts, diagnosticsHandler.ts)
• Makes the task title logic independently testable
• Improves code discoverability

Test Procedure

• TypeScript compilation passes
• Linting passes
• All existing tests pass (no behavioral changes)

Documentation Updates

• No documentation updates are required.

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Important

Refactor setTaskTitle handler into a separate module and introduce editable task titles feature across UI components and settings.

• Refactor:
  • Extract setTaskTitle handler from webviewMessageHandler.ts to taskTitleHandler.ts.
  • Introduce normalizeTitle() function in taskTitleHandler.ts for title sanitization and normalization.
• UI Changes:
  • Add editable task titles feature in TaskHeader.tsx and TaskItem.tsx.
  • Update UISettings.tsx to include a toggle for enabling task titles.
• Settings and State:
  • Add taskTitlesEnabled to global settings schema in global-settings.ts.
  • Update ExtensionState in vscode-extension-host.ts to include taskTitlesEnabled.
• Tests:
  • Add tests for task title editing in TaskHeader.spec.tsx and TaskItem.spec.tsx.
• Misc:
  • Remove unused HistoryItem import from webviewMessageHandler.ts.

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[roomote]

Rooviewer   See task on Roo Cloud

Review complete. No issues found. This is a clean refactoring that extracts the setTaskTitle handler logic into a dedicated module (taskTitleHandler.ts), following existing patterns in the codebase. The new handler adds improved title sanitization (control character removal, whitespace normalization) and the UI changes are purely styling improvements.

Previous reviews

• 7d234d2: Review #1
• 170975d: Review #2
• 170975d: Review #3

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}

[roomote]

Rooviewer   See task on Roo Cloud

Review complete. No issues found. This is a clean refactoring that extracts the setTaskTitle handler logic into a dedicated module, following existing patterns in the codebase.

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}