The AI chat panel (AiPanel → useAiAgent) was sending each message as a
standalone request with no prior context. Root cause: useAiAgent.sendMessage
called streamClaudeAgent with raw text, never embedding history.
- Add agentMessagesToChatHistory() to convert AiAgentMessage[] to ChatMessage[]
- Embed trimmed history in each agent request via formatMessageWithHistory
- Use messagesRef/statusRef to avoid stale closures in async callbacks
- Also fix useAIChat (dead code path) with same ref pattern
- Update mock layers to detect history presence for testability
- Add Playwright smoke tests verifying history accumulates and resets
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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