[Bug]: Cannot paste image from clipboard into message field on Windows 11 desktop app

Is there an existing issue for this?

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Platform

Windows

OS version

Windows 11 24H2 26100.4770

App version

6.4-beta.5 (110)

Current Behavior

Copying an image to clipboard (e.g., via Snipping Tool) and attempting to paste (Ctrl+V) into the message input field does not attach the image. Expected: Image becomes an attachment for sending alone or with text, per standard Windows app behavior (e.g., in apps like Signal or WhatsApp Desktop). Actual: No action occurs.

Additional context

Standard Windows design allows seamless clipboard image paste into chat fields as attachments. Source reference: Desktop app uses Haskell with clipboard handling (see PR #3378 for initial implementation).

Initial implementation: https://github.com/simplex-chat/simplex-chat/pull/3378

Related: https://github.com/simplex-chat/simplex-chat/issues/3232

Expected Behavior

Image attaches to message draft.

Steps To Reproduce

1. Copy image to clipboard on Windows 11.
2. Open SimpleX Chat desktop app.
3. Click message input field in a chat.
4. Paste (Ctrl+V).

Relevant log output

Review PR #3378 for the existing desktop clipboard-handling implementation, then check related issue #3232 for context. Reproduce the problem on Windows 11 by copying an image and pressing Ctrl+V in a chat message field; done means the image appears as an attachment in the draft, with or without text.