All Sessions view only loads recent sessions, cannot scroll to older ones

Description

In Craft Agents (v0.5.1, macOS), the All Sessions view only allows scrolling back a few days. Older sessions that exist on disk are not visible in the UI.

Steps to Reproduce

1. Have a workspace with sessions spanning ~30 days (85 sessions from Jan 29 to Feb 27)
2. Open "All Sessions" view
3. Try scrolling to view older sessions

Expected Behavior

All sessions should be accessible by scrolling, or a "load more" mechanism should be provided.

Actual Behavior

The list only shows sessions back to Feb 24 (~3-4 days). Sessions from Jan 29 – Feb 23 exist on disk (~/.craft-agent/workspaces/{id}/sessions/) but are not visible in the UI.

Environment

• Craft Agents v0.5.1
• macOS (Darwin 25.2.0, arm64)
• 85 sessions on disk, only recent ones visible