feat(diet): lagg till nordisk/carnivore/paleo + LCHF som matvanor med mjuk rankning

- DIET_PATTERNS: +nordic, +carnivore, +paleo (migration 0029). Ingen separat
  "lchf" - LCHF tacks av befintliga "low_carb" for att undvika dubblett med
  keto/low_carb. UI visar low_carb med etiketten "LCHF".
- Mobil onboarding + profil: 9 rena val (allatare..carnivore), 12 sprak.
- recommendation-engine: ny mjuk dietAffinity-poangterm (0-1, neutral 0.5).
  Rankar recept mot matvanan - ALDRIG hart filter (uteslutande matvanor,
  religion, allergener hanteras redan deterministiskt i sakerhetsfiltret).
  low_carb/keto: lag kolhydrat. carnivore: hog protein + lag kolhydrat.
  paleo: glutenfri/laktosfri-proxyer. nordic: svenskt/nordiskt kok + sasong.
- 6 nya tester (35 grona). Full typecheck 20/20 + mobil gron.

apps/mobile/src/app/profile.tsx

@@ -54,7 +54,17 @@ const CONSENT_KINDS = [
   "push_notifications",
   "product_analytics",
 ] as const;
-const DIETS = ["omnivore", "flexitarian", "pescatarian", "vegetarian", "vegan"] as const;
+const DIETS = [
+  "omnivore",
+  "flexitarian",
+  "pescatarian",
+  "vegetarian",
+  "vegan",
+  "nordic",
+  "paleo",
+  "low_carb",
+  "carnivore",
+] as const;
 const ALLERGENS = ["gluten", "milk", "eggs", "tree_nuts", "peanuts", "fish", "crustaceans", "soy", "sesame"] as const;
 const RELIGIOUS = ["none", "halal", "kosher", "hindu_no_beef", "buddhist_vegetarian"] as const;