Support Ctrl+V / Cmd+V to paste images from clipboard into chat

Description
Currently it is not possible to paste images (screenshots, JPGs, PNGs) directly into the chat input using Ctrl+V (Windows/Linux) or Cmd+V (macOS).
You have to use the upload button or drag & drop, which is much slower for a tool that positions itself as a work/productivity app.
Expected behavior

Copy any image to the clipboard (e.g. screenshot)
Press Ctrl+V / Cmd+V in the message composer
The image should be attached to the message (same as file upload)

Why this matters

Standard behavior in Slack, Discord, Telegram, Teams, etc.
Screenshots are used constantly in work contexts
Current workflow is unnecessarily cumbersome

Environment

OS: Linux (Kubuntu)
Buzz version: latest

Would be great to have this implemented. Thanks!