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/useRoadmaps.js

@@ -1,5 +1,5 @@
 import { useState, useCallback } from 'react'
-import { databases, DATABASE_ID, COLLECTIONS, Query, isDemoMode } from '../lib/appwrite'
+import { databases, DATABASE_ID, COLLECTIONS, Query } from '../lib/appwrite'
 import {
   createRoadmapPlan,
   deleteRoadmapPlan,
@@ -13,7 +13,6 @@ export function useRoadmaps() {
   const [error, setError] = useState(null)
 
   const fetchAll = useCallback(async () => {
-    if (isDemoMode) return []
     setLoading(true)
     setError(null)
     try {
@@ -32,7 +31,7 @@ export function useRoadmaps() {
   }, [])
 
   const fetchById = useCallback(async (roadmapId) => {
-    if (!roadmapId || isDemoMode) return null
+    if (!roadmapId) return null
     try {
       return await databases.getDocument(DATABASE_ID, COLLECTIONS.ROADMAPS, roadmapId)
     } catch {
@@ -41,7 +40,6 @@ export function useRoadmaps() {
   }, [])
 
   const fetchByTicketId = useCallback(async (ticketId) => {
-    if (isDemoMode) return null
     try {
       return await fetchRoadmapByTicketId(ticketId)
     } catch {
@@ -50,7 +48,6 @@ export function useRoadmaps() {
   }, [])
 
   const createRoadmap = async (project, data, user) => {
-    if (isDemoMode) return { success: false, error: 'Demo-Modus' }
     try {
       const result = await createRoadmapPlan(project, data, user)
       setRoadmaps((prev) => [result.roadmap, ...prev])
@@ -61,7 +58,6 @@ export function useRoadmaps() {
   }
 
   const updateRoadmap = async (roadmapId, data) => {
-    if (isDemoMode) return { success: false, error: 'Demo-Modus' }
     try {
       const doc = await databases.updateDocument(DATABASE_ID, COLLECTIONS.ROADMAPS, roadmapId, {
         ...data,
@@ -75,7 +71,6 @@ export function useRoadmaps() {
   }
 
   const deleteRoadmap = async (roadmap, user) => {
-    if (isDemoMode) return { success: false, error: 'Demo-Modus' }
     try {
       await deleteRoadmapPlan(roadmap, user)
       setRoadmaps((prev) => prev.filter((r) => r.$id !== roadmap.$id))
@@ -86,7 +81,6 @@ export function useRoadmaps() {
   }
 
   const completePlan = async (roadmap, user) => {
-    if (isDemoMode) return { success: false, error: 'Demo-Modus' }
     try {
       const updated = await completeRoadmap(roadmap, user)
       setRoadmaps((prev) => prev.map((r) => (r.$id === updated.$id ? updated : r)))