fusion

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gsxdsm c073fdc85c FN-6522: load earlier task chat messages

Preserve task-detail chat reading position while paging older agent log entries.

- Add top-of-transcript pagination with an explicit Load previous messages control and loading state.
- Preserve scroll anchoring when earlier log entries are prepended while keeping live bottom-follow behavior for new output.
- Cover scroll-to-top loading and manual loading with regression tests and document the behavior.

Files changed:
 docs/dashboard-guide.md                            |   2 +-
 packages/dashboard/app/components/TaskChatTab.css  |  28 ++++
 packages/dashboard/app/components/TaskChatTab.tsx  |  82 ++++++++++-
 .../app/components/__tests__/TaskChatTab.test.tsx  | 163 ++++++++++++++++++++-
 4 files changed, 269 insertions(+), 6 deletions(-)

Fusion-Task-Id: FN-6522

Fusion-Task-Lineage: b93464cf-0b9a-4a73-b4f5-4f3a5e34cc89

2026-06-16 23:04:45 -07:00