Add test coverage for TaskAutoSync hook

[Hell1213]

Description

Add test coverage for TaskAutoSync hook component. Tests cover interval management, sync functionality, loading states, error handling, and cleanup behavior for useTaskAutoSync hook.

• Contributes: Add frontend test suites/cases for src/components/utils #299

Checklist

• Ran npx prettier --write . (for formatting)
• Ran gofmt -w . (for Go backend)
• Ran npm test (for JS/TS testing)
• Added unit tests, if applicable
• Verified all tests pass
• Updated documentation, if needed

Additional Notes

Implemented 10 test cases achieving 100% coverage across all metrics (statements, branches, functions, lines). Tests validate timer intervals, sync operations, loading state management, error scenarios, and proper cleanup on unmount using Jest fake timers and proper mocking patterns.

[github-actions]

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[Hell1213]

Added tests for TaskAutoSync hook covering timer management, sync behavior, and error scenarios. Tests validate real functionality and ensure proper cleanup to prevent memory leaks.