Proof price tag assistant: allow edits on price tags without predictions

[TTalex]

Problem

• Because of backend performances or pictures quality, waiting for price tags predictions is pointless
• However, the label bounding boxes detection and cropping still have value
• We should be less strict about it, and also display detected bounding boxes that have no Gemini prediction, to let users act on them
• We can either wait shorter amounts of time (50 seconds max currently), or adding the toggle to skip the wait altogether (thus ignoring the Gemini predictions).
• This would also help with the flow currently failing if backend cannot handle newly drawn bounding boxes in less than 50 seconds.