feat(chat): add conversation history and message actions#20

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Dennis-Huangm wants to merge 3 commits into

OpenDCAI:mainfrom

Dennis-Huangm:pr/chat-history

Commits on Mar 7, 2026

feat(ui): add persistent chat conversation history
Dennis-Huangm
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Commits on Mar 8, 2026

fix(chat): avoid stale state when retrying assistant messages
Dennis-Huangm
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fix(chat): guard conversation state against project switch races
Dennis-Huangm
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