fix: correct moment.js duration formatting in format-time utilities

[yashlahase]

Fix incorrect moment.js usage in time formatting functions

Summary

This PR fixes a bug in the time formatting functions where moment().millisecond() was incorrectly used instead of moment().add() to format durations. The millisecond() method only sets the millisecond component (0-999), not total milliseconds, which could cause incorrect time formatting for durations over 1 second.

Problem

Both main/utils/format-time.ts and renderer/utils/format-time.js use moment().startOf('day').millisecond(time * 1000) to format time durations. This is semantically incorrect because:

• millisecond() sets only the millisecond component (0-999), not total milliseconds
• For example, if time = 65 seconds, time * 1000 = 65000 milliseconds
• millisecond(65000) would set milliseconds to 65000 % 1000 = 0, losing the actual duration

Solution

Replace moment().startOf('day').millisecond(time * 1000) with moment().startOf('day').add(time, 'seconds') in both files. This correctly adds the duration as seconds to a moment at the start of the day, which can then be formatted properly.

Changes

• ✅ Fixed main/utils/format-time.ts (line 19)
• ✅ Fixed renderer/utils/format-time.js (line 19)
• ✅ Added comprehensive test coverage in test/format-time.ts

Testing

Added tests covering:

• Seconds formatting (0, 5, 30, 65, 125 seconds)
• Minutes and seconds (60, 90, 3665 seconds)
• Hours formatting (3600, 3661, 7325 seconds)
• Milliseconds display
• Extra time parameter handling

Why This Is Safe

1. Semantic Fix: Corrects incorrect API usage to use proper moment.js API
2. No Breaking Changes: Function signature and return format unchanged
3. Minimal Surface Area: Only 2 lines changed across 2 files
4. Well-Tested: Comprehensive test coverage added
5. Type-Safe: No type changes required