chore(develop): release 4.21.0

[github-actions]

🤖 I have created a release beep boop

4.21.0 (2025-07-29)

Features

• 5553 - add prices for category products (#6552) (9db5c5e)
• 5689 - separate tasks (proof upload and prices adding) (#6781) (2396d04)
• 6479 - price count as badge for proof images (#6795) (849525c)
• 6523 - upgrade to l10n_countries (#6653) (281d803)
• 6591 - update OxF data with Prices data (#6667) (9829a10)
• 6700 - display of "no barcode" data (#6786) (222c5c4)
• 6790 - reuse price tokens (#6793) (800344f)
• Added Matomo event for producers signups from the app (#6418) (12c2569)
• Flutter 3.32 (#6665) (dda75e2)
• Indicator color for Health and Environment tabs (#6715) (df7d9d7)
• Redesign of the list of prices (#6716) (72ec278)
• Redesign the product page to integrate tabs - M2 (#6356) (cfea953)

Bug Fixes

• 5151 - accept '-' as the hidden nutrient text (#6626) (a57704a)
• 6150 - more generous limit to location look-ups (#6698) (f18d6a1)
• 6285 - OxF filter (#6687) (d871848)
• 6565 - put back the fix about long bottom sheets (#6618) (1f0efbf)
• 6587 - fine tuning about prices infinite scrolling (#6620) (c8c4101)
• 6616 - format robotoff extraction as acceptable numeric value (#6625) (e04ed0d)
• 6640 - removed misleading "unsupported barcode" scan card (#6659) (9208f66)
• 6649 - several "no barcode" products can be added in the same page (#6650) (a8a7869)
• 6654 - clean "delete" button for prices (#6656) (49e65f6)
• 6657 - explicit utf8 data for Photon API (#6658) (d9da28d)
• 6685 - centered "no record found" message (#6706) (ac5a208)
• 6701 - correct price list from product page (#6705) (7918884)
• 6732 - price date displayed in local timezone (#6774) (ccfa694)
• 6759 - changed bulk proof uploading display (#6766) (5cb90d9)
• 6761 - improved number format for discount (#6773) (dbbc9fb)
• 6785 - no useless progress indicator (#6787) (0b63457)
• Background tasks and support dirs on iOS devices (#6722) (033f2e5)
• Hotfixes on 4.20.0 (#6600) (6b1c383)
• New UI for the food preferences (#6466) (db036a4)
• Nutrition extract missing nutrients and traces (#6623) (d9e8f0e)
• pt-BR and pt-PT in the Crowdin config to avoid rotating languages (d2f0286)
• pt-BR and pt-PT in the Crowdin config to avoid rotating languages (#6121) (d2f0286)
• Scroll inside bottom sheet (#6693) (a0eb340)
• Search Results Not Updating After Changing Country Without App Restart (#6602) (a8e3947)
• typo for KP in ru (#6760) (e6379a0)
• Update pluralization rules in Dutch localization strings (#6606) (334a5f8)
• Visual glitches (#6724) (e74f94a)

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