[Bug]: Copy-pasting images into a note no longer works (v6.0.0+) #972

Describe the bug

Copying and pasting an image directly into a note has stopped working since version massCode-6.0.0.

I also attempted workaround methods, which also failed:

• Manual asset placement: Manually copying an image file into massCode\markdown-vault\notes.masscode\assets results in massCode failing to recognize the externally added image.
• Markdown reference: Copying an image directly into the markdown Notes folder and referencing it via displays the image as broken.

To reproduce

1. Open massCode (version 6.0.0 or later).
2. Create or open an existing note.
3. Attempt to copy an image to your clipboard and paste it directly into the note editor.
4. Expected behavior: The image should be embedded or uploaded into the note and displayed correctly.
5. Actual behavior: Nothing happens (the image fails to paste/render).

App Version and Architecture

massCode-6.0.0-x64-portable.exe

System info

Windows 11

Validations

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• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
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