## Summary
PR 4 of the notebook-approval-preview stack.
- Adds `NotebookProposalRenderer`, wiring
`create_notebook`/`update_notebook` into `MessagePartSwitcher` and
rendering `NotebookPreview` across all 6 tool states (drafting,
approval-requested, approval-responded, output-available, output-denied,
output-error).
- `update_notebook` fetches the live notebook via `useNotebookQuery`,
checks `expected_updated_at` against the fetched `updated_at`, and gates
the confirm action behind a refresh when stale.
- A tool-input parse failure renders a raw-input admonition instead of
returning `null`, so `ConfirmFooter` — and the ability to Skip/deny —
stays available rather than leaving the chat stuck.
Towards FE-4143
## Test plan
- [x] `tsc --noEmit` clean
- [x] `eslint` clean on touched files
- [x] `prettier --check` clean
- [x] New `NotebookProposalRenderer.test.tsx` (create/update previews +
approve, version-mismatch warning, parse-failure fallback with working
Skip, output-available/output-denied summaries)
- [x] Existing notebook test suites (`notebook-tools.test.ts`,
`notebook-operations`, `NotebookPreview`) still pass
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added AI-assisted notebook creation and updating with previews,
approval controls, and operation summaries.
* Added clear handling for loading, errors, denied actions, stale
notebook versions, and invalid proposals.
* Added links to open notebooks after successful creation or updates.
* Preserved notebook SQL content when displaying proposed changes.
* **Bug Fixes**
* Improved notebook proposal handling for conflicts and incomplete tool
responses.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Charis
79fbe467ba