fix: remove redundant UI controls when editing messages

[roomote]

Description

This PR attempts to address Issue #9163. When editing a message, the redundant mode selector, API config selector, and auto-approve dropdown controls are now hidden to keep the editing interface clean.

Changes

• Wrapped the bottom controls section in ChatTextArea.tsx with a conditional check for !isEditMode
• This prevents duplicate controls from appearing since these options already exist at the bottom of the main chat interface

Testing

• All existing tests pass
• Linting passes
• Type checking passes

Screenshots

The editing interface now only shows the necessary editing controls without the redundant bottom bar.

Fixes #9163

Feedback and guidance are welcome!

---

Important

Hides redundant UI controls in ChatTextArea.tsx during message editing to improve interface clarity.

• Behavior:
  • Hides ModeSelector, ApiConfigSelector, and AutoApproveDropdown in ChatTextArea.tsx when isEditMode is true.
  • Ensures these controls are only visible in non-edit mode to prevent redundancy.
• Testing:
  • All existing tests, linting, and type checking pass.

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[roomote]

Rooviewer   See task on Roo Cloud

Review complete. The implementation correctly wraps the bottom controls section with !isEditMode conditional logic, successfully hiding the redundant ModeSelector, ApiConfigSelector, and AutoApproveDropdown when editing messages. The change is clean, follows existing patterns, and addresses issue #9163 without introducing any issues.

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