## Summary
Added a "Start new chat" button to the ChatErrorBox component that
appears for Dyad Pro enabled users. This provides a quick way to recover
from certain chat errors by creating a fresh conversation.

## Key Changes
- **ChatErrorBox.tsx**: 
  - Added `MessageSquarePlus` icon import from lucide-react
  - Imported Tooltip components for better UX
  - Added `onStartNewChat` optional callback prop
- Rendered a new "Start new chat" button with tooltip when Dyad Pro is
enabled and callback is provided

- **ChatInput.tsx**:
  - Imported `useChats`, `useRouter`, and toast utilities
  - Added `handleNewChat` function that:
    - Creates a new chat via IPC
    - Updates the selected chat ID atom
    - Navigates to the new chat
    - Invalidates the chats cache
    - Shows error toast on failure
  - Passed `handleNewChat` to ChatErrorBox's `onStartNewChat` prop

## Implementation Details
- The button only appears when both `isDyadProEnabled` is true AND
`onStartNewChat` callback is provided
- Includes a helpful tooltip: "Starting a new chat can fix some issues"
- Styled consistently with existing UI (blue-600 background, white text,
hover effects)
- Gracefully handles errors during chat creation with user-facing toast
notifications
- Falls back to home page navigation if appId is unavailable

https://claude.ai/code/session_016vbjv8b4hs5fG52yKHv4oZ
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<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Adds a “Start new chat” button to the chat error box for Dyad Pro users
to quickly recover from errors. Clicking it creates a fresh chat,
navigates to it, refreshes the chat list, and handles failures
gracefully.

- **New Features**
- Button shows only when Dyad Pro is enabled and a callback is provided.
- Creates a new chat via IPC, selects it, navigates to /chat, and
invalidates the chats cache.
- Includes a tooltip (“Starting a new chat can fix some issues”); shows
a toast on failure and falls back to home if no appId.

<sup>Written for commit f71be0aa8c08cdd258bc59daa21939cf91528c62.
Summary will update on new commits.</sup>

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

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk UI/UX change that wires an extra navigation/mutation path
(IPC chat creation + query invalidation) behind an error-state button
for Pro users.
> 
> **Overview**
> Adds a Pro-only recovery action in `ChatErrorBox`: a new **“Start new
chat”** button (with tooltip) shown only when `isDyadProEnabled` and an
`onStartNewChat` callback are provided.
> 
> Wires this action from `ChatInput` via a new `handleNewChat` flow that
creates a chat over IPC, updates the selected chat atom, navigates to
the new chat route, invalidates the chats cache, and shows a toast if
creation fails (fallback navigation to `/` when no `appId`).
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
f71be0aa8c08cdd258bc59daa21939cf91528c62. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->
Co-authored-by: Claude <noreply@anthropic.com>