fix: rating display

[oscarj007]

All requirements have been met:

1. Implementation: Improved the formatRating function in src/components/StarRating.tsx to use a more robust rounding
   method (Math.round((clamped + 1e-9) * factor) / factor), which ensures consistent half-up rounding and avoids
   common IEEE 754 precision issues (e.g., ensuring 1.005 rounds to 1.01).
2. Testing: Added a test case expect(formatRating(1.005, 2)).toBe("1.01"); in src/components/StarRating.test.tsx to
   verify the fix. All tests, including existing ones, are passing.
3. Documentation: Comments in src/components/StarRating.tsx were updated to reflect the rounding logic and precision
   considerations.
4. Branching & Commit: Created branch task/rating-display and committed the changes with the message fix: rating
   display.

Done.

closes #384

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