Use serving/100g for nutrition information based on the image when importing

[TimMagee]

Problem

When importing nutrition facts from a nutrition label, it is necessary to verify the information for correctness. Currently, when the importer reads a nutrition label that is based on a "serving" instead of 100g, it converts all numbers to 100g. This requires the user to do math if they want to verify the information. This inevitably leads to factual errors.

Proposed solution

During import of nutrition information from an image, use the units and quantities specified on the labels so that verification is doable.

Additional context

There are several related issues already open. This one is different from the following:

• Convert nutrient values when toggling between 'per serving' and 'per 100g'  #3617 is about switching the input when the toggle is flipped. This issue is about automatically choosing the correct value of the toggle based on the imported image
• User Preference for 'per 100g' vs 'per serving' toggle #3615 is about having a user preference for entering nutrition information per 100g or per serving. This issue is about automatically entering the data per serving/100g to match the imported image

Part of

• Nutrition extraction (followup) #6412
• Nutrition input (Tracker) #511