Insights report hardcodes PT timezone instead of using system timezone

Description

The /insights report displays "Messages by time of day" using PT (Pacific Time) regardless of the user's actual system timezone.

Expected Behavior

The insights report should use the system timezone (e.g., date +%Z returns MST on my machine) when displaying time-based metrics.

Actual Behavior

Times are displayed in PT even though my system is configured for Mountain Time (MST).

Suggested Fix

Read the system timezone and use it for all time-based displays in the insights report, or add a timezone configuration option to ~/.claude/settings.json.

🤖 _Written with AI assistance_