- Backend:
- Added 'forge' output format support (maps to HTML with Forge theme).
- Implemented 'forge' theme with Montserrat font and white-paper styling.
- Fixed 'Plain Text' mode not returning output.
- Added fallback 'output' return when markdown library is missing.
- Frontend:
- Added 'Forge Document' as the default output format.
- Implemented 'Copy Formatted' button for rich text clipboard support (Word/Excel compatible).
- Switched to single-column layout for better document visibility.
- Used iframe for document preview to isolate styles and prevent layout issues.
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