[Bug]: Snoozed and Settled sections show an up arrow when collapsed #23950

Description

The collapsed Snoozed and Settled lists show an up-arrow chevron.

This is inconsistent with other collapsible sections in T3, which show a down-arrow chevron when collapsed and can be clicked to expand.

Steps to reproduce

1. Open the thread list with Snoozed or Settled threads present.
2. Collapse the Snoozed or Settled section.
3. Observe the chevron direction.

Actual behavior

The collapsed section shows an up arrow.

Expected behavior

Use the same convention as other collapsible sections:

• Collapsed: down arrow; click to expand.
• Expanded: up arrow; click to collapse.

Additional context