[TEST] Upscale Image tool

[jbaddley]

Route

/upscale-image

Scenarios to test

Upload

• Dropzone visible on load
• Uploading a small JPEG (e.g. 200×150) loads the image and shows original dimensions
• Uploading a PNG works

Scale selector

• Scale options 2×, 3×, 4× are present and selectable
• Selecting 2× shows expected output dimensions (2× the input)
• Selecting 4× shows expected output dimensions (4× the input)

Mode selector

• "Smooth" mode option is present (for photos)
• "Crisp" mode option is present (for pixel art / line art)
• Selecting different modes updates the processing approach

Upscale processing

• Clicking "Upscale" starts the process
• A progress indicator or loading state is shown during processing
• The output image is displayed when done
• The output dimensions match the selected scale factor × input dimensions

Download

• Download button triggers a file download after upscaling completes
• Downloaded file dimensions are correct (verified via image metadata or canvas)

Auth gating (if applicable)

• If upscaling is restricted to Pro users, a logged-out user sees an upgrade prompt rather than crashing

Error handling

• Uploading a very large image (>10 MB) shows a file-size warning if applicable
• Network errors during upscale API call show a user-readable error message

Acceptance criteria

• Upscale completes for a 200×150 input at 2× → 400×300 output
• Download produces a file with correct dimensions