<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Introduces fast, scoped code search in local-agent mode and renders
results inline in chat.
> 
> - Adds `grep` tool (ripgrep-backed) with include/exclude globs and
optional case sensitivity; returns `path:line: text` matches
> - New `DyadGrep` component and `DyadMarkdownParser` support for
`dyad-grep`; attribute parsing updated to allow hyphenated names
> - Extracts ripgrep helpers to `ipc/utils/ripgrep_utils.ts` and
refactors `app_handlers` to use them
> - Registers tool in local agent tool set
> - E2E coverage: new fixture, Playwright spec, and ARIA snapshots
validating two searches and rendered output
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
35cd925caf321c1c987b636d9539aed465284f1b. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Adds a grep tool to the local agent using ripgrep and a new <dyad-grep>
UI to show results in chat. Enables fast, scoped code searches with
include/exclude globs and case sensitivity.

- **New Features**
- New local-agent tool grep (ripgrep-backed) that returns file:line:
text matches; case-insensitive by default with include_pattern,
exclude_pattern, and case_sensitive options.
- New DyadGrep chat component and parser support (<dyad-grep>) with
collapsible results, progress/aborted states, and copyable output.
- Shared ripgrep utils (executable path, size limit, default exclude
globs) extracted and reused; tool registered in tool_definitions.

- **Tests**
  - Added E2E spec for grep in local-agent mode with ARIA snapshots.
  - New fixture driving two searches and validating rendered results.

<sup>Written for commit 35cd925caf321c1c987b636d9539aed465284f1b.
Summary will update on new commits.</sup>

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

---------
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>