Pasting images into contenteditable is not supported consistently

Phenomenon

When attempting to paste images (from clipboard) into a contenteditable region, the behavior is inconsistent across browsers. Some browsers ignore the paste, while others may insert a placeholder or fail silently.

Reproduction example

1. Copy an image to the clipboard (e.g., from an image editor or screenshot).
2. Create a contenteditable div.
3. Focus the contenteditable.
4. Paste (Cmd+V or Ctrl+V).
5. Observe what happens.

Observed behavior

• In Chrome on macOS, pasting images may be ignored or fail silently.
• No visual feedback indicates that the paste was attempted.
• The image data may be available in the clipboard but not inserted.

Expected behavior

• Images should be pasted as <img> elements with appropriate src attributes.
• Or, the beforeinput event should allow intercepting and handling image paste.
• Clear feedback should indicate success or failure of the paste operation.