feat: Enhance WebDAV file management and UI

- Add functionality to create new collections via API
- Implement copy and move operations between collections
- Improve image rendering in markdown preview with relative path resolution
- Add support for previewing binary files (images, PDFs)
- Refactor modal styling to use flat buttons and improve accessibility

collections/notes/presentation.md

@@ -0,0 +1,40 @@
+## Mycelium Product Presentation
+
+This document provides an overview of the Mycelium technology stack (as commercially sold my our company GeoMind).
+
+<div style={{
+  position: 'relative',
+  width: '100%',
+  height: 0,
+  paddingTop: '56.25%',
+  marginTop: '1.6em',
+  marginBottom: '0.9em',
+  overflow: 'hidden',
+  borderRadius: '8px',
+  willChange: 'transform'
+}}>
+  <iframe
+    src="https://www.canva.com/design/DAG0UtzICsk/rqXpn5f3ibo2OpX-yDWmPQ/view?embed"
+    style={{
+      position: 'absolute',
+      width: '100%',
+      height: '100%',
+      top: 0,
+      left: 0,
+      border: 'none',
+      padding: 0,
+      margin: 0
+    }}
+    allowFullScreen={true}
+    allow="fullscreen">
+  </iframe>
+</div>
+
+<div style={{ marginTop: '10px' }}>
+  <a href="https://www.canva.com/design/DAG0UtzICsk/rqXpn5f3ibo2OpX-yDWmPQ/view"
+     target="_blank"
+     rel="noopener"
+     style={{ textDecoration: 'none' }}>
+    Geomind Product Intro 2025 (based on mycelium technology)
+  </a>
+</div>