feat: Pipeline↔Anfragen integration + Compare→Pipeline + KI stage detection

Navigation: Deal Pipeline moved after Vergleich (before Anfragen)

Compare → Pipeline:
- Bookmark icon per column header; BookmarkCheck when already in pipeline
- Passes propertyId, propertyAddress, area/rent labels on save

Pipeline cards now unit-level:
- propertyAddress shown with MapPin on every card
- Chat icon (MessageSquare) on cards with linked inquiry → navigates to /demand/anfragen?inquiry=xxx
- Detail panel: Chat chip links to specific inquiry thread, propertyAddress displayed

Anfragen → Pipeline KI detection:
- Keyword scan on every sent message (besichtigung → VISITED, mietvertrag → NEGOTIATION, unterschrieben → CLOSED_WON)
- Only advances stage, never goes back
- Purple KI alert banner with direct Pipeline link, auto-dismisses after 6s
- Pipeline badge in inquiry list + stage chip in chat header with nav link
- URL param ?inquiry=xxx pre-selects inquiry (used from Pipeline chat button)

Domain: PipelineItem gains propertyId, unitId, propertyAddress, inquiryId
Mock data: pl-001/pl-002/pl-004 linked to inq-001/inq-005/inq-004

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

src/components/compare/CompareColumnHeader.tsx

@@ -1,5 +1,6 @@
 import { Box, Chip, IconButton, Tooltip, Typography } from '@mui/material'
-import { X, AlertTriangle } from 'lucide-react'
+import { X, AlertTriangle, Bookmark, BookmarkCheck } from 'lucide-react'
+import { usePipelineStore } from '../../stores/pipelineStore'
 import type { UnifiedMatchResult } from '../../domain/unifiedResult'
 
 const TYPE_META: Record<string, { label: string; color: string }> = {
@@ -17,30 +18,70 @@ interface Props {
 }
 
 export function CompareColumnHeader({ item, onRemove }: Props) {
+  const { items: pipelineItems, openSavedDialog } = usePipelineStore()
+
   const meta = TYPE_META[item.resultType] ?? { label: item.resultType, color: '#64748b' }
   const prop = item.resultType !== 'FUTURE_AVAILABILITY' ? (item as any).property : null
   const sig  = item.resultType === 'FUTURE_AVAILABILITY' ? (item as any).signal  : null
 
-  const title       = prop?.title ?? sig?.companyName ?? sig?.locationHint ?? '–'
-  const subtitle    = prop?.location?.city ?? sig?.locationHint ?? '–'
+  const title        = prop?.title ?? sig?.companyName ?? sig?.locationHint ?? '–'
+  const subtitle     = prop?.location?.city ?? sig?.locationHint ?? '–'
+  const district     = prop?.location?.district
   const availability = prop?.availabilityDate ?? (sig ? `~${sig.timeHorizonMonths} Monate` : null)
-  const confidence  = Math.round(item.match.confidenceLevel * 100)
-  const source      = prop?.sourceLabel ?? sig?.source?.type ?? '–'
+  const confidence   = Math.round(item.match.confidenceLevel * 100)
+  const source       = prop?.sourceLabel ?? sig?.source?.type ?? '–'
+
+  const isInPipeline = pipelineItems.some(
+    pi => pi.id === item.matchId || (prop?.id && pi.propertyId === prop.id)
+  )
+
+  function handleSave() {
+    if (isInPipeline) return
+    openSavedDialog({
+      resultId: item.matchId,
+      resultType: item.resultType,
+      title,
+      location: prop?.location?.city ?? sig?.locationHint,
+      matchScore: item.matchScore,
+      propertyId: prop?.id,
+      propertyAddress: prop ? `${title}, ${subtitle}${district ? `, ${district}` : ''}` : undefined,
+      areaLabel: prop?.areaSqm ? `${prop.areaSqm.toLocaleString('de-CH')} m²` : undefined,
+      rentLabel: prop?.rentPricePerSqm ? `CHF ${prop.rentPricePerSqm}/m²` : undefined,
+      availabilityLabel: prop?.availabilityDate ?? undefined,
+    })
+  }
 
   return (
     <Box sx={{ p: 0.5 }}>
       <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start', mb: 1 }}>
         <Chip label={meta.label} size="small" sx={{ bgcolor: meta.color, color: 'white', fontWeight: 600, fontSize: 10 }} />
-        <IconButton size="small" onClick={onRemove} sx={{ p: 0.25, ml: 1 }}>
-          <X size={14} />
-        </IconButton>
+        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.25 }}>
+          <Tooltip title={isInPipeline ? 'Bereits in Pipeline' : 'In Pipeline merken'}>
+            <IconButton
+              size="small"
+              onClick={handleSave}
+              sx={{
+                p: 0.25,
+                color: isInPipeline ? '#1a7a4a' : '#94a3b8',
+                '&:hover': { color: isInPipeline ? '#1a7a4a' : '#1e3a5f' },
+              }}
+            >
+              {isInPipeline
+                ? <BookmarkCheck size={14} />
+                : <Bookmark size={14} />}
+            </IconButton>
+          </Tooltip>
+          <IconButton size="small" onClick={onRemove} sx={{ p: 0.25, ml: 0.25 }}>
+            <X size={14} />
+          </IconButton>
+        </Box>
       </Box>
 
       <Typography variant="subtitle2" sx={{ fontWeight: 700, mb: 0.25, lineHeight: 1.3 }}>
         {title}
       </Typography>
       <Typography variant="caption" color="text.secondary" sx={{ display: 'block', mb: 1 }}>
-        {subtitle}
+        {subtitle}{district ? `, ${district}` : ''}
       </Typography>
 
       <Box sx={{ display: 'flex', alignItems: 'baseline', gap: 0.5, mb: 0.5 }}>