ENH - add DarkChat media attachments

frontend/src/utils/clipboard.ts

@@ -0,0 +1,23 @@
+export function copyText(value: string): boolean {
+  const activeElement =
+    document.activeElement instanceof HTMLElement
+      ? document.activeElement
+      : undefined
+  const textarea = document.createElement('textarea')
+
+  textarea.value = value
+  textarea.readOnly = true
+  textarea.style.position = 'fixed'
+  textarea.style.left = '-9999px'
+  textarea.style.opacity = '0'
+  document.body.appendChild(textarea)
+  textarea.select()
+  textarea.setSelectionRange(0, value.length)
+
+  try {
+    return document.execCommand('copy')
+  } finally {
+    textarea.remove()
+    activeElement?.focus({ preventScroll: true })
+  }
+}