v1.1: Rebrand Hinterstein Immobilien + echtes Auth-System

- Rebrand: Kunden-Logo, Joseph-Hinterstein-Portrait, Kontakt-Banner, Texte
- Login-Pflicht auf /login (Route-Guard), Gruppen Verwaltung/Mieter
- Mieter-Registrierung per einmaligem Registrierungscode
- Benutzerverwaltung als 6. Modul (/benutzer, nur Verwaltung)
- Demo-Zugänge mit Passwort 0815 (j.hinterstein, a.berger, m.wolf)
- Mail-Server-API: Token-Auth (/send, X-Api-Token), Mail-Stack live auf Server
- Store-Key hinterstein-mieterportal-v2, Doku (kimi.md, README) nachgeführt

src/pages/Tickets.tsx

@@ -20,7 +20,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select'
-import { useStore, DEMO_TENANT, DEMO_UNIT_ID } from '../store/store'
+import { useStore } from '../store/store'
 import type { TicketPriority, TicketStatus } from '../types'
 
 const statusStyle: Record<TicketStatus, string> = {
@@ -46,7 +46,7 @@ const categories = [
 ]
 
 function NewTicketDialog() {
-  const { dispatch, role } = useStore()
+  const { dispatch, role, me, meineEinheit } = useStore()
   const [open, setOpen] = useState(false)
   const [title, setTitle] = useState('')
   const [category, setCategory] = useState('Sanitär')
@@ -59,8 +59,8 @@ function NewTicketDialog() {
       type: 'addTicket',
       ticket: {
         id: `t-${Date.now()}`,
-        unitId: role === 'tenant' ? DEMO_UNIT_ID : 'hs-1',
-        tenant: role === 'tenant' ? DEMO_TENANT : 'Hocks Verwaltung (intern)',
+        unitId: role === 'tenant' ? meineEinheit.id : 'hs-1',
+        tenant: role === 'tenant' ? (me?.name ?? 'Mieter') : 'Hinterstein Immobilien (intern)',
         title: title.trim(),
         description: description.trim() || '–',
         category,
@@ -144,16 +144,16 @@ function NewTicketDialog() {
 }
 
 export default function Tickets() {
-  const { tickets, units, role, dispatch } = useStore()
+  const { tickets, units, role, dispatch, meineEinheit } = useStore()
   const [filter, setFilter] = useState<'alle' | TicketStatus>('alle')
 
   const visible = useMemo(
     () =>
       (role === 'tenant'
-        ? tickets.filter((t) => t.unitId === DEMO_UNIT_ID)
+        ? tickets.filter((t) => t.unitId === meineEinheit.id)
         : tickets
       ).filter((t) => filter === 'alle' || t.status === filter),
-    [tickets, role, filter],
+    [tickets, role, filter, meineEinheit],
   )
 
   const counts = {