feat: 5326 - add prices to proof from gallery (and thumbnails)

[monsieurtanuki]

What

• Now we have faster proof gallery, as we use thumbnails.
• From the proof page, we have a button to add prices to that proof.
• Still to be done in order to close the issue: when the user clicks on "select a proof: camera / gallery", add the option "proof gallery".

Screenshots

proof page	add price page

Part of

• Allow to pick a price proof from your online proof gallery  #5326

Files

New files:

• background_task_add_other_price.dart: Background task about adding prices to an existing proof.
• background_task_price.dart: Abstract background task about adding prices.

Impacted files:

• background_task_add_price.dart: refactored using new class BackgroundTaskPrice
• get_prices_model.dart: new web app root address
• operation_type.dart: added the new background task
• osm_location.dart: minor refactoring
• price_currency_selector.dart: additional case - proof instead of input; refactored using model
• price_date_card.dart: additional case - proof instead of input
• price_location_card.dart: additional case - proof instead of input
• price_model.dart: added specific constructor and background task for the "existing proof" case
• price_product_widget.dart: minor refactoring
• price_proof_card.dart: additional case - proof instead of input
• price_proof_page.dart: added a FAB to add price from an existing proof; now displaying the thumbnail and then the full proof
• price_user_button.dart: new web app root address
• prices_proofs_page.dart: proof thumnails; new web app root address
• prices_users_page.dart: new web app root address
• product_price_add_page.dart: now accepting a model as parameter, in order to deal with both old proofs and new prices
• pubspec.lock: wtf
• pubspec.yaml: upgraded to openfoodfacts 3.16.0, for proof thumbnails
• user_preferences_account.dart: new web app root address

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 258 lines in your changes missing coverage. Please review.

Project coverage is 6.81%. Comparing base (4d9c7fc) to head (55dabe7).
Report is 348 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ooth_app/lib/background/background_task_price.dart	0.00%	83 Missing ⚠️
...kages/smooth_app/lib/pages/prices/price_model.dart	0.00%	39 Missing ⚠️
...ib/background/background_task_add_other_price.dart	0.00%	22 Missing ⚠️
.../smooth_app/lib/pages/prices/price_proof_card.dart	0.00%	22 Missing ⚠️
.../smooth_app/lib/pages/prices/price_proof_page.dart	0.00%	22 Missing ⚠️
...ooth_app/lib/pages/prices/price_location_card.dart	0.00%	15 Missing ⚠️
...s/smooth_app/lib/pages/prices/price_date_card.dart	0.00%	13 Missing ⚠️
...s/smooth_app/lib/pages/locations/osm_location.dart	0.00%	12 Missing ⚠️
..._app/lib/pages/prices/price_currency_selector.dart	0.00%	9 Missing ⚠️
..._app/lib/background/background_task_add_price.dart	0.00%	7 Missing ⚠️
... and 6 more

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5670      +/-   ##
==========================================
- Coverage     9.54%   6.81%   -2.74%     
==========================================
  Files          325     404      +79     
  Lines        16411   21506    +5095     
==========================================
- Hits          1567    1466     -101     
- Misses       14844   20040    +5196     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[monsieurtanuki]

Oops, detected a bug, working on it...

[monsieurtanuki]

Oops, detected a bug, working on it...

The bug was about Prices sometimes sending incomplete proof data (e.g. the location field being "unexpectedly" null).
We can deal with it: if the proof data we retrieve from the gallery is not "good enough", we don't show the "add prices to that proof" button.
TBH it only happened once in my tests.
BTW the thumbnail is really cool: when we display the thumbnail while the full image is loading, we hardly notice the difference when the full image replaces the thumbnail. Nice compression!

TL;DR
Ready for review ;)

[teolemon]

👍

[monsieurtanuki]

Thank you @teolemon for your review!