<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Introduces a reusable `ExperimentalBadge` and refines chat mode labels
in `ChatModeSelector`.
> 
> - Adds `ExperimentalBadge` and displays it next to `Agent v2`
> - Removes "(experimental)" suffix from MCP mode title and tweaks
layout (flex with gap) for mode headers
> - Updates `Agent v2` description to "Better at bigger tasks and
debugging"
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
f513f856f7a223fddfadbb4b0762bf9998295414. 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
Added an Experimental badge component and applied it to Agent v2 in
ChatModeSelector. Removed "(experimental)" from labels and updated Agent
v2 description to "Better at bigger tasks and debugging" for clearer
guidance.

<sup>Written for commit f513f856f7a223fddfadbb4b0762bf9998295414.
Summary will update on new commits.</sup>

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