feat: add useDataTableColumns with toggleable, draggable, resizable, pinnable columns

apps/docs/docs/widgets/downloads/index.mdx

@@ -44,8 +44,11 @@ import contextMenuImg from './img/context-menu.png';
 
 - **Responsive table** — columns automatically adapt to widget width, hiding less important columns at smaller sizes
 - **Sortable columns** — click any column header to sort ascending/descending
+- **Column customization** — toggle, reorder, resize, and pin columns via the header menu; preferences persist in local storage
 - **Right-click context menu** — pause, resume, delete downloads, or copy download names directly from the context menu
 - **Row expansion** — click any row to see full details inline without opening a separate modal
+- **Hover tooltips** — hover a download name to see size, speeds, ETA, ratio, and category
+- **Global stats bar** — toggle a summary bar showing queue progress, total size, speeds, ratio, and per-state counts
 - **Client filtering** — filter downloads by integration or status using the footer filter panel
 - **Global controls** — pause/resume all downloads across all clients from the footer bar
 - **Status indicators** — color-coded badges show download state at a glance
@@ -80,6 +83,9 @@ import contextMenuImg from './img/context-menu.png';
 
 - **Right-click** any download to open a context menu with pause/resume, delete, and copy actions
 - **Click** any row to expand it and see full download details inline
+- **Hover** a download name for a quick stats tooltip
+- **Column header menu** — show/hide, reorder, resize, or pin columns (reset via the columns button in the footer)
+- **Stats toggle** — show or hide the global stats bar from the footer
 - **Pause / Resume** all downloads using the footer controls
 - **Filter** by integration or status using the filter button in the footer
 - **Sort** by clicking column headers (with persistent sort direction)