Add a prompt to add the category and or the ingredients to compute the NOVA group if it is missing

[teolemon]

if nova is empty, then:

if ( 
status= category-to-be-completed && 
status = ingredients-to-be-completed 
)
then "Add ingredients and a category to see the level of food processing and potential additives"

if ( 
status= category-to-be-completed
)
then "Add a category to see the level of food processing and potential additives"

if ( 
status = ingredients-to-be-completed 
)
then "Add ingredients to see the level of food processing and potential additives"

• The relevant fields are here: https://world.openfoodfacts.org/api/v0/product/5425600101745.json?fields=states_tags
• The button and the logic system already exists for the Nutri-Score, so extending it should be simple.
• We should then jump at the right place (either ingredient tab if no ingredient picture is there, or editing in the summary tab if the category is missing)
• Better yet, a custom simplified edit mode with just what's needed to get the NOVA

Mockup of the Nutri-Score buttons for iOS (you can see them live on some products in the Android version)