feat(apps): migrate Presi, Picture, Inventar, NutriPhi, Planta, Storage to local-first

Add IndexedDB data layer (Dexie.js via @manacore/local-store) to 6 more apps,
bringing the total to 12/22 apps with local-first architecture.

For each app:
- Create local-store.ts with typed collections and sync config
- Create guest-seed.ts with onboarding data for guest mode
- Update layout with AuthGate allowGuest={true} + handleAuthReady()
- Add GuestWelcomeModal for first-visit experience
- Add @manacore/local-store dependency

App-specific changes:
- Presi: Rewrite decks store from API to IndexedDB, conditional share button
- Picture: Rewrite gallery + boards pages to read from IndexedDB
- Inventar: Replace manual auth $effect with AuthGate, keep localStorage stores
- NutriPhi: Add onReady handler to existing AuthGate
- Planta: Add allowGuest + sync init to existing AuthGate
- Storage: Add local store init to existing handleAuthReady

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/nutriphi/apps/web/package.json

@@ -50,6 +50,7 @@
 		"@manacore/shared-help-types": "workspace:*",
 		"@manacore/shared-help-ui": "workspace:*",
 		"@manacore/shared-icons": "workspace:*",
+		"@manacore/local-store": "workspace:*",
 		"@manacore/shared-profile-ui": "workspace:*",
 		"@manacore/shared-subscription-ui": "workspace:*",
 		"@manacore/shared-tailwind": "workspace:*",

apps/nutriphi/apps/web/src/lib/data/guest-seed.ts

@@ -0,0 +1,55 @@
+/**
+ * Guest seed data for the NutriPhi app.
+ *
+ * Provides demo meals and default goals for the onboarding experience.
+ */
+
+import type { LocalMeal, LocalGoal } from './local-store';
+
+const today = new Date().toISOString().split('T')[0];
+
+export const guestMeals: LocalMeal[] = [
+	{
+		id: 'meal-breakfast',
+		date: today,
+		mealType: 'breakfast',
+		inputType: 'text',
+		description: 'Haferflocken mit Banane und Honig',
+		confidence: 0.9,
+		nutrition: {
+			calories: 380,
+			protein: 10,
+			carbohydrates: 68,
+			fat: 8,
+			fiber: 6,
+			sugar: 24,
+		},
+	},
+	{
+		id: 'meal-lunch',
+		date: today,
+		mealType: 'lunch',
+		inputType: 'text',
+		description: 'Vollkorn-Sandwich mit Avocado und Ei',
+		confidence: 0.85,
+		nutrition: {
+			calories: 520,
+			protein: 22,
+			carbohydrates: 45,
+			fat: 28,
+			fiber: 8,
+			sugar: 4,
+		},
+	},
+];
+
+export const guestGoals: LocalGoal[] = [
+	{
+		id: 'default-goals',
+		dailyCalories: 2000,
+		dailyProtein: 60,
+		dailyCarbs: 250,
+		dailyFat: 65,
+		dailyFiber: 30,
+	},
+];

apps/nutriphi/apps/web/src/lib/data/local-store.ts

@@ -0,0 +1,83 @@
+/**
+ * NutriPhi — Local-First Data Layer
+ *
+ * Meals, nutrition, goals, and favorites stored locally.
+ * AI analysis and recommendations remain server-side.
+ */
+
+import { createLocalStore, type BaseRecord } from '@manacore/local-store';
+import { guestMeals, guestGoals } from './guest-seed';
+
+// ─── Types ──────────────────────────────────────────────────
+
+export interface LocalMeal extends BaseRecord {
+	date: string;
+	mealType: 'breakfast' | 'lunch' | 'dinner' | 'snack';
+	inputType: 'photo' | 'text';
+	description: string;
+	portionSize?: string | null;
+	confidence: number;
+	nutrition?: {
+		calories: number;
+		protein: number;
+		carbohydrates: number;
+		fat: number;
+		fiber: number;
+		sugar: number;
+	} | null;
+}
+
+export interface LocalGoal extends BaseRecord {
+	dailyCalories: number;
+	dailyProtein?: number | null;
+	dailyCarbs?: number | null;
+	dailyFat?: number | null;
+	dailyFiber?: number | null;
+}
+
+export interface LocalFavorite extends BaseRecord {
+	name: string;
+	description: string;
+	mealType: 'breakfast' | 'lunch' | 'dinner' | 'snack';
+	nutrition: {
+		calories: number;
+		protein: number;
+		carbohydrates: number;
+		fat: number;
+		fiber: number;
+		sugar: number;
+	};
+	usageCount: number;
+}
+
+// ─── Store ──────────────────────────────────────────────────
+
+const SYNC_SERVER_URL = import.meta.env.PUBLIC_SYNC_SERVER_URL || 'http://localhost:3050';
+
+export const nutriphiStore = createLocalStore({
+	appId: 'nutriphi',
+	collections: [
+		{
+			name: 'meals',
+			indexes: ['date', 'mealType', '[date+mealType]'],
+			guestSeed: guestMeals,
+		},
+		{
+			name: 'goals',
+			indexes: [],
+			guestSeed: guestGoals,
+		},
+		{
+			name: 'favorites',
+			indexes: ['mealType', 'usageCount'],
+		},
+	],
+	sync: {
+		serverUrl: SYNC_SERVER_URL,
+	},
+});
+
+// Typed collection accessors
+export const mealCollection = nutriphiStore.collection<LocalMeal>('meals');
+export const goalCollection = nutriphiStore.collection<LocalGoal>('goals');
+export const favoriteCollection = nutriphiStore.collection<LocalFavorite>('favorites');

apps/nutriphi/apps/web/src/routes/+layout.svelte

@@ -8,9 +8,13 @@
 	import { authStore } from '$lib/stores/auth.svelte';
 	import { mealsStore } from '$lib/stores/meals.svelte';
 	import { parseMealInput, formatParsedMealPreview } from '$lib/utils/meal-parser';
-	import { SessionExpiredBanner, AuthGate } from '@manacore/shared-auth-ui';
+	import { SessionExpiredBanner, AuthGate, GuestWelcomeModal } from '@manacore/shared-auth-ui';
+	import { shouldShowGuestWelcome } from '@manacore/shared-auth-ui';
+	import { nutriphiStore } from '$lib/data/local-store';
 	let { children } = $props();
 
+	let showGuestWelcome = $state(false);
+
 	// QuickInputBar handlers - search recent meals
 	async function handleSearch(query: string): Promise<QuickInputItem[]> {
 		const q = query.toLowerCase();
@@ -38,6 +42,16 @@
 		};
 	}
 
+	async function handleAuthReady() {
+		await nutriphiStore.initialize();
+		if (authStore.isAuthenticated) {
+			nutriphiStore.startSync(() => authStore.getValidToken());
+		}
+		if (!authStore.isAuthenticated && shouldShowGuestWelcome('nutriphi')) {
+			showGuestWelcome = true;
+		}
+	}
+
 	async function handleCreate(query: string): Promise<void> {
 		if (!query.trim()) return;
 		const parsed = parseMealInput(query);
@@ -60,7 +74,7 @@
 	{/if}
 </svelte:head>
 
-<AuthGate {authStore} {goto} allowGuest={true}>
+<AuthGate {authStore} {goto} allowGuest={true} onReady={handleAuthReady}>
 	{#if $i18nLoading}
 		<div class="flex min-h-screen items-center justify-center bg-background">
 			<div
@@ -88,4 +102,13 @@
 		{/if}
 		<SessionExpiredBanner locale="de" loginHref="/login" />
 	{/if}
+
+	<GuestWelcomeModal
+		appId="nutriphi"
+		visible={showGuestWelcome}
+		onClose={() => (showGuestWelcome = false)}
+		onLogin={() => goto('/login')}
+		onRegister={() => goto('/register')}
+		locale="de"
+	/>
 </AuthGate>