feat: merge Merkliste into Pipeline (SAVED stage) + Anfragen chat page

- Remove standalone Merkliste/Shortlists nav item; pipeline now covers the full funnel
- Add SAVED as first PipelineStage — 'Merken' on result cards lands here
- pipelineStore (Zustand) holds shared items; AddToPipelineDialog replaces AddToShortlistDialog in demand workspace
- New /demand/anfragen split-panel: searchable inquiry list + chat thread with compose
- Pipeline detail panel: KI insight, stage actions, editable notes, mock documents
- ShortlistItemCard: cards clickable → property detail, Anfrage button with inline dialog
- Supply workspace (FutureAvailability, Anfragencenter) unchanged

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

src/components/results/UnifiedResultCard.tsx

@@ -3,7 +3,7 @@ import { MatchCardCompact } from '../match-card/MatchCardCompact'
 import { IntelligenceMatchCard } from '../match-card/IntelligenceMatchCard'
 import { buildMatchCardViewModel } from '../../features/matching/matchCardAdapter'
 import { useCompareStore } from '../../stores/compareStore'
-import { useShortlistStore } from '../../stores/shortlistStore'
+import { usePipelineStore } from '../../stores/pipelineStore'
 import type { UnifiedMatchResult } from '../../domain/unifiedResult'
 import type { MatchCardAction } from '../match-card/MatchCardViewModel'
 
@@ -22,7 +22,7 @@ function getResultTitle(result: UnifiedMatchResult): string {
 export function UnifiedResultCard({ result, view = 'list' }: Props) {
   const navigate = useNavigate()
   const { addToCompare, removeFromCompare, isInCompare, isFull } = useCompareStore()
-  const { openAddDialog } = useShortlistStore()
+  const { openSavedDialog } = usePipelineStore()
   const inCompare = isInCompare(result.matchId)
 
   const isPortfolio = result.resultType === 'VERIFIED_PORTFOLIO'
@@ -30,17 +30,15 @@ export function UnifiedResultCard({ result, view = 'list' }: Props) {
   const actions: MatchCardAction[] = [
     {
       id: 'shortlist',
-      label: 'Shortlist',
+      label: 'Merken',
       actionType: 'SAVE_SHORTLIST',
       variant: 'secondary',
-      onClick: () => openAddDialog({
+      onClick: () => openSavedDialog({
         resultId: result.matchId,
         resultType: result.resultType,
         title: getResultTitle(result),
         matchScore: result.matchScore,
-        confidenceScore: result.match.confidenceLevel,
-        sourceLabel: result.resultType,
-        addedBy: 'admin@ideal-sharing.ch',
+        location: result.resultType !== 'FUTURE_AVAILABILITY' ? result.property.location?.city : undefined,
       }),
     },
     {