Demo-Modus entfernt

isDemoMode war nie aktiv: appwrite.js hat immer eine Projekt-ID als
Fallback. Weg sind die Demo-Zweige in Anmeldung und Hooks sowie die
Beispieldaten aus der alten IT-Welt (Serverausfall, Drucker, Kunde A–E).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/hooks/useCustomers.js

@@ -4,7 +4,6 @@ import {
   DATABASE_ID,
   Query,
   databases,
-  isDemoMode,
 } from '../lib/appwrite'
 import {
   createCustomerWithPortalAccess,
@@ -13,26 +12,12 @@ import {
   updateCustomerWithPortalAccess,
 } from '../lib/customerAdminApi'
 
-const DEMO_MODE = isDemoMode
-
-// Demo-Kunden für Testing
-const DEMO_CUSTOMERS = [
-  { $id: '1', code: 'C001', name: 'Kunde A', location: 'Berlin', email: 'kunde.a@example.com', phone: '030-123456' },
-  { $id: '2', code: 'C002', name: 'Kunde B', location: 'München', email: 'kunde.b@example.com', phone: '089-654321' }
-]
-
 export function useCustomers() {
   const [customers, setCustomers] = useState([])
   const [loading, setLoading] = useState(true)
   const [error, setError] = useState(null)
 
   const fetchCustomers = useCallback(async () => {
-    if (DEMO_MODE) {
-      setCustomers(DEMO_CUSTOMERS)
-      setLoading(false)
-      return
-    }
-
     try {
       try {
         const response = await listCustomersForAdmin()
@@ -67,17 +52,6 @@ export function useCustomers() {
   }, [fetchCustomers])
 
   const createCustomer = async (data) => {
-    if (DEMO_MODE) {
-      const { password, ...rest } = data
-      const newCustomer = {
-        ...rest,
-        portalPassword: password || rest.portalPassword || '',
-        $id: Date.now().toString(),
-      }
-      setCustomers(prev => [...prev, newCustomer])
-      return { success: true, data: newCustomer }
-    }
-
     try {
       const { password, ...fields } = data
       const result = await createCustomerWithPortalAccess({ ...fields, password })
@@ -93,19 +67,6 @@ export function useCustomers() {
   }
 
   const updateCustomer = async (id, data) => {
-    if (DEMO_MODE) {
-      const { password, ...rest } = data
-      setCustomers(prev =>
-        prev.map(c => {
-          if (c.$id !== id) return c
-          const next = { ...c, ...rest }
-          if (password) next.portalPassword = password
-          return next
-        })
-      )
-      return { success: true }
-    }
-
     try {
       const { password, ...fields } = data
       const payload = { ...fields }
@@ -135,11 +96,6 @@ export function useCustomers() {
   }
 
   const deleteCustomer = async (id) => {
-    if (DEMO_MODE) {
-      setCustomers(prev => prev.filter(c => c.$id !== id))
-      return { success: true }
-    }
-
     try {
       await deleteCustomerWithPortalAccess(id)
       setCustomers(prev => prev.filter(c => c.$id !== id))