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}

apps/web/src/components/preferences/preferences-form.tsx

@@ -5,10 +5,12 @@ import {
   CUISINE_TAGS,
   EXCLUSION_GROUPS,
   FASTING_PROTOCOL_VALUES,
+  TRAINING_TYPES,
   type CookingTimeLevel,
   type CuisineTag,
   type ExclusionGroup,
   type PreferencesPatch,
+  type TrainingType,
 } from '@ketopath/shared';
 import { useTranslations } from 'next-intl';
 import { useState } from 'react';
@@ -27,6 +29,10 @@ export interface PreferencesValues {
   cuisinePreferences: CuisineTag[];
   cookingTime: CookingTimeLevel;
   fastingProtocol: (typeof FASTING_PROTOCOL_VALUES)[number] | null;
+  trainingDays: number[];
+  trainingType: TrainingType | null;
+  sessionMinutes: number | null;
+  mealsPerDay: number | null;
 }
 
 export const DEFAULT_PREFERENCES_VALUES: PreferencesValues = {
@@ -34,8 +40,14 @@ export const DEFAULT_PREFERENCES_VALUES: PreferencesValues = {
   cuisinePreferences: [],
   cookingTime: 'MEDIUM',
   fastingProtocol: null,
+  trainingDays: [],
+  trainingType: null,
+  sessionMinutes: null,
+  mealsPerDay: null,
 };
 
+const DAY_LABELS = ['Lun', 'Mar', 'Mer', 'Gio', 'Ven', 'Sab', 'Dom'];
+
 interface PreferencesFormProps {
   initial: PreferencesValues;
   onSubmit: (patch: PreferencesPatch) => Promise<{ ok: boolean; error?: string }>;
@@ -86,6 +98,10 @@ export function PreferencesForm({
       cuisinePreferences: values.cuisinePreferences,
       cookingTime: values.cookingTime,
       fastingProtocol: values.fastingProtocol,
+      trainingDays: values.trainingDays,
+      trainingType: values.trainingType,
+      sessionMinutes: values.sessionMinutes,
+      mealsPerDay: values.mealsPerDay,
     });
     setPending(false);
     if (!result.ok) {
@@ -198,6 +214,108 @@ export function PreferencesForm({
         </fieldset>
       ) : null}
 
+      <fieldset className="space-y-5">
+        <legend className="font-display text-ink text-2xl font-medium leading-tight tracking-tight">
+          {t('trainingTitle')}
+        </legend>
+        <p className="font-display text-ink-soft text-base italic leading-snug">
+          {t('trainingHint')}
+        </p>
+        <div className="flex flex-wrap gap-2">
+          {DAY_LABELS.map((label, idx) => (
+            <Chip
+              key={idx}
+              label={label}
+              active={values.trainingDays.includes(idx)}
+              onToggle={() =>
+                setValues((prev) => ({
+                  ...prev,
+                  trainingDays: prev.trainingDays.includes(idx)
+                    ? prev.trainingDays.filter((d) => d !== idx)
+                    : [...prev.trainingDays, idx].sort((a, b) => a - b),
+                }))
+              }
+            />
+          ))}
+        </div>
+        <div className="grid gap-6 sm:grid-cols-2">
+          <div>
+            <p className="editorial-eyebrow mb-3">{t('trainingType')}</p>
+            <Select
+              value={values.trainingType ?? 'NONE'}
+              onValueChange={(v) =>
+                setValues((prev) => ({
+                  ...prev,
+                  trainingType: v === 'NONE' ? null : (v as TrainingType),
+                }))
+              }
+            >
+              <SelectTrigger>
+                <SelectValue />
+              </SelectTrigger>
+              <SelectContent>
+                <SelectItem value="NONE">{t('trainingNone')}</SelectItem>
+                {TRAINING_TYPES.map((tt) => (
+                  <SelectItem key={tt} value={tt}>
+                    {t(`trainingTypeLabel.${tt}`)}
+                  </SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+          </div>
+          <div>
+            <p className="editorial-eyebrow mb-3">{t('sessionMinutes')}</p>
+            <input
+              type="number"
+              min={10}
+              max={240}
+              step={5}
+              inputMode="numeric"
+              placeholder="60"
+              value={values.sessionMinutes ?? ''}
+              onChange={(e) =>
+                setValues((prev) => ({
+                  ...prev,
+                  sessionMinutes: e.target.value === '' ? null : Number(e.target.value),
+                }))
+              }
+              className="border-ink/30 focus:border-ink w-full border-b bg-transparent py-2 outline-none"
+            />
+          </div>
+        </div>
+      </fieldset>
+
+      <fieldset className="space-y-5">
+        <legend className="font-display text-ink text-2xl font-medium leading-tight tracking-tight">
+          {t('mealsPerDayTitle')}
+        </legend>
+        <p className="font-display text-ink-soft text-base italic leading-snug">
+          {t('mealsPerDayHint')}
+        </p>
+        <div className="max-w-xs">
+          <Select
+            value={values.mealsPerDay != null ? String(values.mealsPerDay) : 'AUTO'}
+            onValueChange={(v) =>
+              setValues((prev) => ({
+                ...prev,
+                mealsPerDay: v === 'AUTO' ? null : Number(v),
+              }))
+            }
+          >
+            <SelectTrigger>
+              <SelectValue />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="AUTO">{t('mealsAuto')}</SelectItem>
+              <SelectItem value="1">{t('mealsLabel.1')}</SelectItem>
+              <SelectItem value="2">{t('mealsLabel.2')}</SelectItem>
+              <SelectItem value="3">{t('mealsLabel.3')}</SelectItem>
+              <SelectItem value="4">{t('mealsLabel.4')}</SelectItem>
+            </SelectContent>
+          </Select>
+        </div>
+      </fieldset>
+
       {error ? (
         <p className="font-display text-pomodoro text-base italic" role="alert">
           {error}