Bug: Expected "PM" but received "pm" in formatted time

[ANCHITAYUSH]

The convertUnixToTime function is returning lowercase "pm" instead of uppercase "PM".

• Expected: 01:00 PM
• Received: 01:00 pm

This mismatch is causing the test case in src/tests/lib/formatters.test.js to fail due to case-sensitive string comparison.

Test Failure Screenshot