Reduces from 3 tabs (Schedule / Description / Simulations) to 2 (Description / Simulations). Schedule content (start/end/status/created_at + Edit button) moved into a header block at the top of the Description panel, separated from description text by a hairline <hr>. Default tab changed from 'schedule' to 'description'. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>