feat: storia diete, schedule allenamento, frequenza pasti (PRD §5.1)

Tre leve aggiuntive che migliorano la personalizzazione del piano dopo
le tre del commit precedente (BF%, deficit, condizioni mediche).

1. Storia delle diete precedenti (adattamento metabolico)
   - Profile.dietHistory ∈ {NONE,SOME,EXTENSIVE,SEVERE} cifrato at-rest
   - bmrAdjustForDietHistory: 0.97 / 0.93 / 0.85 — aggiustamento BMR per
     riflettere l'adattamento metabolico osservato in studi a lungo termine
     (Fothergill 2016 Biggest Loser, Rosenbaum 2008)
   - Select in ProfileForm con copy diretto sulla "questione yo-yo"

2. Schedule allenamento (kcal extra training-day)
   - Preferences.trainingDays Int[] (0=Lun..6=Dom)
   - Preferences.trainingType ∈ {CARDIO,STRENGTH,MIXED,SPORT}
   - Preferences.sessionMinutes Int?
   - extraKcalForSession: equazione MET (Ainsworth 2011) con MET prevalenti
     8/5/6/7 a tipo. Output arrotondato a 25 kcal per evitare false-precisioni
   - Plan generation aggiunge l'extra solo nei training days
   - Chips Lun-Dom + select tipo + input durata in PreferencesForm

3. Frequenza pasti preferita
   - Preferences.mealsPerDay Int? (1..4)
   - mealShareForFrequency: 1=solo cena, 2=pranzo+cena, 3=no spuntino, 4=default
   - Quando mealsPerDay è impostato e non c'è fastingProtocol attivo,
     sostituisce la share del protocollo (il digiuno IF ha precedenza)
   - Slot a share=0 saltati alla creazione (niente colazione/spuntino "vuoti")

Schema migration 20260429220XXX_add_lifestyle_fields.

Smoke verificato via API: con mealsPerDay=3 e nessun protocollo IF, ogni
giorno del piano ha esattamente 3 pasti (Colazione+Pranzo+Cena, niente
Spuntino). 54/54 unit test verdi (11 nuovi).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/app/[locale]/onboarding/onboarding-flow.tsx

@@ -579,5 +579,9 @@ function toFormValues(view: PreferencesView): PreferencesValues {
     cuisinePreferences: view.cuisinePreferences as CuisineTag[],
     cookingTime: view.cookingTime as CookingTimeLevel,
     fastingProtocol: view.fastingProtocol as PreferencesValues['fastingProtocol'],
+    trainingDays: view.trainingDays,
+    trainingType: view.trainingType as PreferencesValues['trainingType'],
+    sessionMinutes: view.sessionMinutes,
+    mealsPerDay: view.mealsPerDay,
   };
 }

apps/web/src/app/[locale]/profile/preferences-actions.ts

@@ -15,6 +15,10 @@ export interface PreferencesView {
   cuisinePreferences: string[];
   cookingTime: 'LOW' | 'MEDIUM' | 'HIGH';
   fastingProtocol: string | null;
+  trainingDays: number[];
+  trainingType: string | null;
+  sessionMinutes: number | null;
+  mealsPerDay: number | null;
 }
 
 export async function fetchPreferences(): Promise<PreferencesView | null> {

apps/web/src/app/[locale]/profile/preferences-section.tsx

@@ -46,6 +46,10 @@ export function PreferencesSection({ initial }: { initial: PreferencesView | nul
 
 function toFormValues(view: PreferencesView): PreferencesValues {
   return {
+    trainingDays: view.trainingDays,
+    trainingType: view.trainingType as PreferencesValues['trainingType'],
+    sessionMinutes: view.sessionMinutes,
+    mealsPerDay: view.mealsPerDay,
     exclusions: view.exclusions as ExclusionGroup[],
     cuisinePreferences: view.cuisinePreferences as CuisineTag[],
     cookingTime: view.cookingTime as CookingTimeLevel,

apps/web/src/app/[locale]/profile/profile-form.tsx

@@ -1,7 +1,13 @@
 'use client';
 
 import { zodResolver } from '@hookform/resolvers/zod';
-import { ACTIVITY_LEVELS, GENDERS, profileInputSchema, type ProfileInput } from '@ketopath/shared';
+import {
+  ACTIVITY_LEVELS,
+  DIET_HISTORIES,
+  GENDERS,
+  profileInputSchema,
+  type ProfileInput,
+} from '@ketopath/shared';
 import { useRouter } from 'next/navigation';
 import { useTranslations } from 'next-intl';
 import { useState } from 'react';
@@ -56,6 +62,10 @@ export function ProfileForm({
             weightCurrentKg: initial.weightCurrentKg,
             weightGoalKg: initial.weightGoalKg,
             activityLevel: initial.activityLevel,
+            ...(initial.targetWeeklyLossKg != null
+              ? { targetWeeklyLossKg: initial.targetWeeklyLossKg }
+              : {}),
+            ...(initial.dietHistory ? { dietHistory: initial.dietHistory } : {}),
           },
         }
       : {}),
@@ -249,6 +259,34 @@ export function ProfileForm({
             )}
           />
 
+          <FormField
+            control={form.control}
+            name="dietHistory"
+            render={({ field }) => (
+              <FormItem className="space-y-3">
+                <FormLabel>{t('dietHistory')}</FormLabel>
+                <Select onValueChange={field.onChange} value={field.value ?? ''}>
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder={t('selectPlaceholder')} />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    {DIET_HISTORIES.map((d) => (
+                      <SelectItem key={d} value={d}>
+                        {t(`dietHistoryLabel.${d}`)}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <p className="font-display text-ink-soft text-sm italic leading-snug">
+                  {t('dietHistoryHint')}
+                </p>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
           {serverError ? (
             <p role="alert" className="font-display text-pomodoro text-base italic">
               {serverError}