- Move icon name logic to Attachment and Reference classes
- Create reusable setElementIcon Svelte action in ElementHelper
- Update ChatArea and ChatAttachments to use new icon helper
- Add visual separator and background color for message attachments
- Fix duplicate URIs in drag-and-drop file handling
- Improve attachment icon centering with flexbox layout
- Move MimeTypeToFileTypes and FileTypeToMimeType mappings to dedicated FileTypeMimeTypeMapping enum file
- Add empty content validation for file attachments
- Add PDF support for Gemini
- Display attachment references in user messages with file info
- Fix OpenAI unsupported mime type message formatting
- Improve URI list handling in InputService to include text/plain
- Update chat area padding and styling for better attachment display
- Prevent drag selection on chat padding element
- Update test assertions for new unsupported mime type message format