feat: preferences, exclusion-aware planner, /onboarding (PRD §5.1, §3)

Preferences (PRD §5.1)
- @ketopath/shared: zod schemas + EXCLUSION_GROUPS, CUISINE_TAGS,
  COOKING_TIMES, FASTING_PROTOCOL_VALUES
- apps/api: GET/PATCH /me/preferences (exclusions, cuisinePreferences,
  cookingTime, fastingProtocol)
- apps/web: PreferencesForm chip-based + PreferencesSection wired into
  /profile so existing users can edit
- Plan generation now aggregates Ingredient.exclusionGroups → Recipe
  exclusionTags so matchMeals filters out excluded recipes

Onboarding (PRD §3)
- /onboarding multi-step (profile → preferences → done) with smart-jump:
  starts at the first incomplete step
- ProfileForm gains optional onSaved/saveLabel for reuse outside /profile
- Redirect chain updated: /welcome accept → /onboarding (was /profile);
  /plan, /tracking, /shopping redirect missing profiles to /onboarding
- /profile remains the editing surface for returning users

i18n
- New Onboarding + Preferences namespaces (it)

Smoke tested end-to-end: selected fish exclusion, regenerated the plan,
verified Salmone/Branzino/Tonno are filtered out and unaffected recipes
(Frittata, Pollo, Mandorle, Polpette) remain.

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

apps/web/src/app/[locale]/profile/page.tsx

@@ -9,6 +9,8 @@ import { getServerSession } from '@/lib/auth';
 import { fetchProfile } from './actions';
 import { fetchNotificationConfig } from './notifications-actions';
 import { NotificationsPanel } from './notifications-panel';
+import { fetchPreferences } from './preferences-actions';
+import { PreferencesSection } from './preferences-section';
 import { ProfileForm } from './profile-form';
 
 export default async function ProfilePage({ params: { locale } }: { params: { locale: string } }) {
@@ -24,16 +26,21 @@ export default async function ProfilePage({ params: { locale } }: { params: { lo
 
   const profile = (await fetchProfile()) as Parameters<typeof ProfileForm>[0]['initial'];
   const notifications = await fetchNotificationConfig();
+  const preferences = await fetchPreferences();
 
-  return <ProfilePageContent initial={profile} notifications={notifications} />;
+  return (
+    <ProfilePageContent initial={profile} notifications={notifications} preferences={preferences} />
+  );
 }
 
 function ProfilePageContent({
   initial,
   notifications,
+  preferences,
 }: {
   initial: Parameters<typeof ProfileForm>[0]['initial'];
   notifications: Awaited<ReturnType<typeof fetchNotificationConfig>>;
+  preferences: Awaited<ReturnType<typeof fetchPreferences>>;
 }) {
   const t = useTranslations('Profile');
 
@@ -56,9 +63,15 @@ function ProfilePageContent({
           <ProfileForm initial={initial} />
         </div>
 
-        <div className="rule animate-rule-in my-16 [animation-delay:480ms]" />
+        <div className="rule animate-rule-in my-16 [animation-delay:420ms]" />
 
-        <div className="animate-fade-up [animation-delay:540ms]">
+        <div className="animate-fade-up [animation-delay:480ms]">
+          <PreferencesSection initial={preferences} />
+        </div>
+
+        <div className="rule animate-rule-in my-16 [animation-delay:600ms]" />
+
+        <div className="animate-fade-up [animation-delay:660ms]">
           <NotificationsPanel initial={notifications} />
         </div>
       </main>