Attachment Management

The attachment management feature modernizes file handling with a drag-and-drop upload interface, server-side image processing, and automatic Markdown image reference insertion.

Features

- Drag-and-drop file upload with progress indicators

- Server-side image thumbnail generation

- Filename validation and sanitization

- Inline Markdown reference insertion (`![alt](attachment:filename)`)

- Attachment listing with delete capability

Implementation

The upload endpoint is in `wikantik-rest`, with the React UI component handling the drag-and-drop interaction and progress display. The `AttachmentManager` in `wikantik-main` handles storage through the provider abstraction.

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