hermes - 💡(How to fix) Fix [Bug]: Desktop: pasting a file from clipboard shows giant Finder preview but does not attach the file on send [1 pull requests]

Bug Description

In the Hermes Desktop app, when a file is copied to the clipboard (e.g., from Finder) and pasted into the chat composer, the composer displays a giant Finder-style preview of the file instead of handling it as a proper file attachment.

When the message is sent, the file is not actually attached to the message — the preview appears to be cosmetic only and does not result in the file being uploaded or sent.

Steps to Reproduce

1. Open Finder and select a file (e.g., an image, PDF, or document).
2. Copy the file to the clipboard (Cmd+C).
3. Open Hermes Desktop app.
4. Paste the file into the chat composer (Cmd+V).
5. Observe that a large Finder-style preview appears in the composer.
6. Send the message.
7. Observe that the file is not actually attached to the sent message.

Expected Behavior

Pasting a file from the clipboard should either:

• Properly attach the file as a message attachment (similar to drag-and-drop), or
• Not render a giant preview if the file cannot be attached.

Actual Behavior

• A large Finder-style preview of the file appears in the composer.
• The file is not attached when the message is sent.
• The preview appears to be a cosmetic rendering of the clipboard file, not a functional attachment.

Affected Component

Other (Hermes Desktop UI)

Messaging Platform (if gateway-related)

N/A

Debug Report

Hermes Desktop clipboard paste behavior issue.

Operating System

macOS 26.5.1 (darwin-arm64)

Python Version

N/A

Hermes Version

v0.15.1 (+303) 43fd63b

Additional Logs / Traceback (optional)

N/A — UI behavior issue

Root Cause Analysis (optional)

No response

Proposed Fix (optional)

No response

Are you willing to submit a PR for this?

• I'd like to fix this myself and submit a PR