fix(desktop): rename generic attachment action from ‘Attach image’ to ‘Attach file’ #2381

Problem

The message composer paperclip accepts generic safe attachments—including images, videos, PDFs, archives, and other supported files—but its tooltip and accessible name still say “Attach image.”

This is misleading for sighted users and gives screen-reader users an incomplete description of the action.

Proposed change

• Change the message composer paperclip tooltip from Attach image to Attach file.
• Change the button aria-label from Attach image to Attach file.
• Update affected Desktop E2E selectors/assertions to use the new accessible name.

Scope

This issue is limited to the generic message-composer attachment control. Image-specific actions elsewhere (for example, feedback screenshots) should retain image-specific wording.

Acceptance criteria

• The generic composer paperclip is announced and displayed as Attach file.
• Selecting images, videos, and generic files continues to work unchanged.
• Desktop tests pass with the updated accessible name.