Fix search_and_replace tool button consistency

[roomote]

Summary

This PR fixes issue #5756 where the search_and_replace tool was using "Approve"/"Reject" buttons instead of "Save"/"Cancel" buttons like other write tools, causing textarea content to be cleared instead of sent to the chat.

Changes

• Added searchAndReplace to the case statement that handles write tools in ChatView.tsx
• This ensures search_and_replace uses "Save"/"Cancel" buttons like other write tools (editedExistingFile, appliedDiff, newFileCreated, insertContent)
• Maintains consistent UX where users can provide feedback in the textarea and it gets sent to the chat when clicking buttons

Testing

• ✅ All existing tests pass
• ✅ Linting and type checking pass
• ✅ Build completes successfully

Impact

• Fixes inconsistent button behavior for search_and_replace tool
• Users can now provide feedback that gets sent to the chat instead of being lost
• Maintains consistency with other write tools

Fixes #5756

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Important

Fixes button inconsistency for search_and_replace tool in ChatView.tsx by using "Save"/"Cancel" buttons.

• Behavior:
  • Adds searchAndReplace to the case statement in ChatView.tsx to use "Save"/"Cancel" buttons instead of "Approve"/"Reject".
  • Ensures textarea content is sent to chat when buttons are clicked, maintaining consistency with other write tools.
• Testing:
  • All existing tests pass.
  • Linting and type checking pass.
  • Build completes successfully.

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