## Summary
- Fixed chat summarization failing in local-agent mode with "no
technical discussion" error
- Added `messageOverride` parameter to `handleLocalAgentStream` to pass
transformed messages
- When summarize intent is detected, the formatted chat content is now
correctly passed to the local agent handler instead of relying on
database messages

Fixes #2292

## Test plan
- [ ] In local-agent mode, trigger "Summarize to new chat" from a chat
with technical content
- [ ] Verify the summarization completes successfully instead of showing
"no technical discussion" error
- [ ] Verify normal chat functionality in local-agent mode is not
affected

🤖 Generated with [Claude Code](https://claude.com/claude-code)

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Fixes "Summarize to new chat" failing in local-agent mode by passing the
formatted chat content to the local agent instead of reading DB history,
addressing #2292. Prevents the "no technical discussion" error while
keeping normal chat behavior unchanged.

- **Bug Fixes**
- Added messageOverride to handleLocalAgentStream to use transformed
messages.
- chat_stream_handlers passes chatMessages on summarize intent;
otherwise uses DB-derived history.
- Added Playwright E2E test to verify summarize-to-new-chat works in
local-agent mode.

<sup>Written for commit c88a646b22127a655b8e96f77956e3cbd01f4a45.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Fix local-agent summarization**
> 
> - Detects summarize intent and passes formatted `chatMessages` via
`messageOverride` to `handleLocalAgentStream`; handler now prefers
overrides over DB-derived history
> - Uses read-only system prompt in ask-mode local-agent path and wires
both ask/local-agent paths to support overrides
> - Adds E2E test `local_agent_summarize.spec.ts` with snapshot to
verify summarize-to-new-chat works
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
c88a646b22127a655b8e96f77956e3cbd01f4a45. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>