fix: replace toast with mock PDF generation dialog in Marktsignale tab

BerichtDialog now animates a progress bar (idle → generating → ready),
then triggers a blob download of Marktsignal-Bericht_{id}.pdf on confirm.

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

src/components/supply/PropertyMarketSignalsTab.tsx

@@ -1,8 +1,7 @@
-import { useEffect, useState } from 'react'
-import { Alert, Box, Button, Chip, CircularProgress, LinearProgress, Typography } from '@mui/material'
-import { BarChart2, Building2, FileText, Lightbulb, TrendingUp } from 'lucide-react'
+import { useEffect, useRef, useState } from 'react'
+import { Alert, Box, Button, Chip, CircularProgress, Dialog, DialogContent, DialogTitle, LinearProgress, Typography } from '@mui/material'
+import { BarChart2, Building2, CheckCircle, Download, FileText, Lightbulb, TrendingUp } from 'lucide-react'
 import { marketReportService } from '../../services/marketReportService'
-import { useToastStore } from '../../stores/toastStore'
 import type { MarketReport, PropertyMarketSignal, SignalCategory } from '../../domain/marketReport'
 
 interface Props {
@@ -94,10 +93,133 @@ function SignalCard({ signal }: { signal: PropertyMarketSignal }) {
   )
 }
 
+// ── PDF generation dialog ─────────────────────────────────────────────────────
+
+type PdfState = 'idle' | 'generating' | 'ready'
+
+interface BerichtDialogProps {
+  open: boolean
+  onClose: () => void
+  report: MarketReport | null
+  propertyId: string
+}
+
+function BerichtDialog({ open, onClose, report, propertyId }: BerichtDialogProps) {
+  const [state, setState] = useState<PdfState>('idle')
+  const [progress, setProgress] = useState(0)
+  const timerRef = useRef<ReturnType<typeof setInterval> | null>(null)
+
+  useEffect(() => {
+    if (!open) { setState('idle'); setProgress(0); return }
+    setState('generating')
+    setProgress(0)
+    let p = 0
+    timerRef.current = setInterval(() => {
+      p += Math.random() * 18 + 8
+      if (p >= 100) {
+        p = 100
+        clearInterval(timerRef.current!)
+        setTimeout(() => setState('ready'), 300)
+      }
+      setProgress(Math.min(100, p))
+    }, 200)
+    return () => { if (timerRef.current) clearInterval(timerRef.current) }
+  }, [open])
+
+  function handleDownload() {
+    const signals = report?.signals ?? []
+    const lines: string[] = [
+      'MARKTSIGNAL-BERICHT',
+      '====================',
+      `Objekt-ID: ${propertyId}`,
+      `Erstellt: ${new Date().toLocaleString('de-CH')}`,
+      '',
+    ]
+    for (const s of signals) {
+      lines.push(`[${s.category.toUpperCase()}] ${s.title}`)
+      lines.push(s.body)
+      if (s.source) lines.push(`Quelle: ${s.source}`)
+      lines.push('')
+    }
+    const blob = new Blob([lines.join('\n')], { type: 'application/pdf' })
+    const url = URL.createObjectURL(blob)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = `Marktsignal-Bericht_${propertyId}.pdf`
+    a.click()
+    URL.revokeObjectURL(url)
+    onClose()
+  }
+
+  return (
+    <Dialog open={open} onClose={state === 'generating' ? undefined : onClose} maxWidth="xs" fullWidth>
+      <DialogTitle sx={{ fontWeight: 700, fontSize: '1rem', pb: 1 }}>
+        Bericht erstellen
+      </DialogTitle>
+      <DialogContent>
+        {state === 'generating' && (
+          <Box sx={{ py: 2 }}>
+            <Box sx={{ display: 'flex', alignItems: 'center', gap: 1.5, mb: 2 }}>
+              <CircularProgress size={20} />
+              <Typography variant="body2" sx={{ color: '#374151' }}>
+                PDF-Bericht wird generiert…
+              </Typography>
+            </Box>
+            <LinearProgress
+              variant="determinate"
+              value={progress}
+              sx={{ height: 6, borderRadius: 3, bgcolor: '#e2e8f0', '& .MuiLinearProgress-bar': { bgcolor: '#1e3a5f' } }}
+            />
+            <Typography variant="caption" sx={{ color: '#94a3b8', mt: 0.75, display: 'block' }}>
+              {Math.round(progress)}% — Marktsignale werden aufbereitet
+            </Typography>
+          </Box>
+        )}
+
+        {state === 'ready' && (
+          <Box sx={{ py: 2 }}>
+            <Box sx={{ display: 'flex', alignItems: 'center', gap: 1.5, mb: 2 }}>
+              <CheckCircle size={20} color="#1a7a4a" />
+              <Typography variant="body2" sx={{ color: '#166534', fontWeight: 600 }}>
+                Bericht ist bereit
+              </Typography>
+            </Box>
+            <Box sx={{ p: 2, bgcolor: '#f8fafc', borderRadius: 1.5, border: '1px solid #e2e8f0', mb: 2 }}>
+              <Typography variant="caption" sx={{ color: '#64748b', display: 'block' }}>Dateiname</Typography>
+              <Typography variant="body2" sx={{ fontWeight: 500 }}>
+                Marktsignal-Bericht_{propertyId}.pdf
+              </Typography>
+              <Typography variant="caption" sx={{ color: '#94a3b8', display: 'block', mt: 0.5 }}>
+                {report?.signals.length ?? 0} Signale · {new Date().toLocaleDateString('de-CH')}
+              </Typography>
+            </Box>
+            <Box sx={{ display: 'flex', gap: 1 }}>
+              <Button
+                fullWidth
+                variant="contained"
+                startIcon={<Download size={15} />}
+                onClick={handleDownload}
+                sx={{ textTransform: 'none', bgcolor: '#1e3a5f', '&:hover': { bgcolor: '#16304d' } }}
+              >
+                Herunterladen
+              </Button>
+              <Button fullWidth variant="outlined" onClick={onClose} sx={{ textTransform: 'none' }}>
+                Schliessen
+              </Button>
+            </Box>
+          </Box>
+        )}
+      </DialogContent>
+    </Dialog>
+  )
+}
+
+// ── Main tab component ────────────────────────────────────────────────────────
+
 export function PropertyMarketSignalsTab({ propertyId }: Props) {
   const [report, setReport] = useState<MarketReport | null>(null)
   const [loading, setLoading] = useState(true)
-  const showToast = useToastStore(s => s.showToast)
+  const [dialogOpen, setDialogOpen] = useState(false)
 
   useEffect(() => {
     let cancelled = false