Files
fusion/packages/dashboard/app/hooks
gsxdsm 3d28b3b212 FN-6632: preserve reattached chat stream chunks
Seed streaming accumulators from durable in-flight snapshots so reattached chat bubbles keep prior chunks.

- Add initial text, thinking, and tool-call snapshots to chat stream handlers.
- Wire main chat and QuickChat reattach flows to seed handler accumulators before replayed deltas arrive.
- Cover text, thinking, and tool-call continuation across shared handler, main chat, and QuickChat tests.
- Document the reattach accumulator invariant and add a published package changeset.

Files changed:
 .changeset/fn-6632-chat-stream-reattach.md         |   5 +
 docs/architecture.md                               |   2 +-
 docs/dashboard-guide.md                            |   2 +-
 .../__tests__/createChatStreamHandlers.test.ts     |  63 +++++++
 .../dashboard/app/hooks/__tests__/useChat.test.ts  | 182 +++++++++++++++++++++
 .../app/hooks/__tests__/useQuickChat.test.ts       | 147 +++++++++++++++++
 .../app/hooks/createChatStreamHandlers.ts          |  19 ++-
 packages/dashboard/app/hooks/useChat.ts            |   7 +
 packages/dashboard/app/hooks/useQuickChat.ts       |   7 +
 9 files changed, 429 insertions(+), 5 deletions(-)

Fusion-Task-Id: FN-6632
Fusion-Task-Lineage: e2f2eb42-08aa-4bae-a79f-60cfc9fb03d4
2026-06-18 06:36:03 -07:00
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