restore-clipboard-image-paste-attachments-in-composer.md

Feature: Restore clipboard image paste attachments in composer

Prerequisites

• Start the app from this repository (pnpm run dev).
• Open any thread where the composer is enabled.
• Have an image copied to system clipboard (for example screenshot copy).

Steps

1. Focus the composer textarea.
2. Paste clipboard content that contains only an image file payload.
3. Confirm an image chip/preview is added to composer attachments.
4. Copy plain text only and paste into composer.
5. Copy mixed content (plain text + image, if source provides both) and paste once.
6. Copy long plain text (at least 2000 characters) and paste into composer.
7. Confirm the long text is attached as a .txt file instead of being inserted into the textarea.
8. Send the message with the pasted image/text attachment.

Expected Results

• Image-only clipboard paste adds an image attachment to composer.
• Plain-text paste still inserts text into the composer and does not create an attachment.
• Mixed payload paste attaches the image while preserving text paste behavior.
• Long plain-text paste (>= 2000 chars) creates a .txt attachment and does not insert raw text into the textarea.
• Sending proceeds with the attached pasted image.

Rollback/Cleanup

• Remove the attached image chip from composer if not needed.