* feat(ui): merge Copy & Paste into a split button group in action bar
Reduce action bar clutter by combining the Copy Text (OCR) and Paste
buttons into a single split button with a dropdown caret. Paste remains
the primary action; Copy Text is accessible via the dropdown menu.
Adds a reusable SplitButton component built on Headless UI Menu.
Made-with: Cursor
* fix(ui): fix className override and remove unused SplitButton wrapper
Merge HeadlessUI className with internal styles in SplitButtonPrimary
instead of silently discarding it. Remove unused SplitButton convenience
wrapper.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(ui): fix lint errors and prettier formatting
Made-with: Cursor
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>