Rebuild as InnungsApp project: replace stadtwerke analysis with full documentation

- PRD: vollständige Produktspezifikation (5 Module, Scope, Akzeptanzkriterien)
- ARCHITECTURE: Tech Stack, Ordnerstruktur, Multi-Tenancy, Push, Kosten
- DATABASE_SCHEMA: Vollständiges SQL-Schema mit RLS Policies und Views
- USER_STORIES: 40+ Stories nach Rolle (Admin, Mitglied, Azubi, Obermeister)
- PERSONAS: 5 detaillierte Nutzerprofile mit Alltag, Zitaten und Erwartungen
- BUSINESS_MODEL: Preistabellen, Unit Economics, Revenue-Projektionen, Distribution
- ROADMAP: 6 Phasen, Sprint-Planung, Meilensteine und KPIs
- COMPETITIVE_ANALYSIS: Wettbewerbsmatrix, USPs, Preispositionierung
- API_DESIGN: Supabase Query Patterns, Edge Functions, Realtime Subscriptions
- ONBOARDING_FLOWS: 7 User Flows von Setup bis Fehlerfall
- GTM_STRATEGY: 3-Phasen-Vertrieb, Outreach-Sequenz, Einwandbehandlung
- AZUBI_MODULE: Video-Feed, 1-Click-Apply, Chat, Berichtsheft, Quiz
- DSGVO_KONZEPT: Rechtsgrundlagen, TOMs, AVV, Minderjährige, Incident Response
- FEATURES_BACKLOG: 72 Features nach MoSCoW + Technische Schulden

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

innungsapp/apps/mobile/lib/notifications.ts

@@ -0,0 +1,43 @@
+import * as Notifications from 'expo-notifications'
+import { Platform } from 'react-native'
+import { trpc } from './trpc'
+import { queryClient } from './trpc'
+
+Notifications.setNotificationHandler({
+  handleNotification: async () => ({
+    shouldShowAlert: true,
+    shouldPlaySound: true,
+    shouldSetBadge: true,
+  }),
+})
+
+export async function setupPushNotifications() {
+  if (Platform.OS === 'web') return
+
+  const { status: existingStatus } = await Notifications.getPermissionsAsync()
+  let finalStatus = existingStatus
+
+  if (existingStatus !== 'granted') {
+    const { status } = await Notifications.requestPermissionsAsync()
+    finalStatus = status
+  }
+
+  if (finalStatus !== 'granted') return
+
+  const token = await Notifications.getExpoPushTokenAsync({
+    projectId: process.env.EXPO_PUBLIC_PROJECT_ID,
+  })
+
+  // Store push token on the server
+  // We call the tRPC mutation to save the token
+  const caller = trpc.createClient as never
+  // Simple fetch to avoid circular deps:
+  const apiUrl = process.env.EXPO_PUBLIC_API_URL ?? 'http://localhost:3000'
+  await fetch(`${apiUrl}/api/push-token`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ token: token.data }),
+  }).catch(() => {
+    // Silently fail — push is optional
+  })
+}