gsxdsm ab1f6a7ffa FN-5706: hide chat input overflow until max-height ...

Prevent the chat composer from showing a right-edge scrollbar line before it reaches the autosize cap.

- set chat textarea default overflow to hidden in ChatView CSS
- add resolveChatInputOverflowY to switch overflow to auto only past the 640px cap
- apply overflow mode during composer autosize updates
- extend chat input autosize tests and docs to cover overflow behavior

Files changed:
 docs/dashboard-guide.md                                          | 2 +-
 packages/dashboard/app/components/ChatView.css                   | 1 +
 packages/dashboard/app/components/ChatView.tsx                   | 5 +++++
 packages/dashboard/app/components/__tests__/ChatView.chat-input-autosize.test.tsx   | 9 ++++++++-
 4 files changed, 15 insertions(+), 2 deletions(-)

Fusion-Task-Id: FN-5706

Fusion-Task-Lineage: 4619aa30-c02f-453b-bdf2-f60f360e9372

2026-05-29 20:47:13 -07:00

128 KiB

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