feat: smarter expiry-to-shopping-list logic

- Extend isExpiringSoon threshold: 3d -> 7d
- Expired items: add isRegular/buyCount>=2 guard so one-off
  expired products don't appear in shopping list (expiry
  banner already covers them)
- Expiring-soon block: require isRegular for 7-day window;
  add 'willExpireBeforeUsed' check (daysLeft > daysToExpiry);
  new reason string 'Scade in Ngg — ricompra' when stock is
  adequate but won't be consumed in time

CHANGELOG.md

@@ -11,6 +11,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **Recipe scraps tips** — During cooking steps, detect "waste" generated (peels, cores, bones, eggshells, coffee grounds, citrus zest, etc.) and surface AI-powered tips on how to reuse them (compost, natural cleaner, broth, candied peel, etc.). Could be shown as an optional collapsible hint card below the step that generates the scrap.
 
+## [1.7.32] - 2026-05-29
+
+### Changed
+- **Smarter expiry u2192 shopping list logic** — The "expiring soon" threshold is now 7 days (was 3), giving enough time to plan the next shopping trip. Items expiring soon are only flagged for restocking when the user is a **regular buyer** (`isRegular`) and either stock is low (<50%) or the consumption rate predicts the item will expire before being used. Non-regular products keep the old 3-day safety-net. Expired items are now only added to the shopping list when `isRegular || buyCount >= 2` — products that expired unused without ever being a staple no longer pollute the list; the expiry banner handles them.
+
+
 ## [1.7.31] - 2026-05-29
 
 ### Fixed