feat: navigate from Marktsignale tab to Anfragencenter latente Anfragen

'Angebot erstellen' button in Marktsignale tab pre-selects the property
in the offer store and navigates to /supply/anfragen on the Latente
Anfragen tab. Also fixes offerWizardStore.open() to preserve
selectedPropertyIds so pre-selection survives the wizard open call.

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

src/pages/supply/Anfragencenter.tsx

@@ -1,9 +1,12 @@
 import { useState } from 'react'
+import { useLocation } from 'react-router'
 import { Box, Tab, Tabs, Typography } from '@mui/material'
 import { ActiveInquiriesTab, LatentInquiriesTab, OfferWizard } from '../../components/anfragencenter'
 
 export default function Anfragencenter() {
-  const [tab, setTab] = useState(0)
+  const location = useLocation()
+  const initialTab = (location.state as { tab?: number } | null)?.tab ?? 0
+  const [tab, setTab] = useState(initialTab)
   return (
     <Box sx={{ display: 'flex', flexDirection: 'column', height: '100%', overflow: 'hidden' }}>
       <Box sx={{ borderBottom: '1px solid #e2e8f0', px: 3, bgcolor: 'white', flexShrink: 0 }}>