feat: Aktivitätslog tab in PropertyDetailView — per-property timeline

Adds a new "Aktivitätslog" tab (9th tab) to the supply-side property
drawer. Shows match approvals/rejections, need registrations, data
quality flags, and governance actions linked to this specific property.
Only visible to Verwaltung users in their own property view.

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

src/components/supply/PropertyDetailView.tsx

@@ -18,6 +18,7 @@ import type { Property } from '../../domain/property'
 import type { Match } from '../../domain/match'
 import type { FutureSignal } from '../../domain/futureSignal'
 import { usePropertyById, usePropertyMatches, usePropertySignals } from '../../hooks/useProperties'
+import { PropertyActivityLogPanel } from './PropertyActivityLogPanel'
 import { PropertyDetailSkeleton } from './PropertyDetailSkeleton'
 import {
   getAssetTypeColor,
@@ -310,7 +311,7 @@ function SignalsPanel({ signals }: { signals: FutureSignal[] }) {
 
 // ── Main component ────────────────────────────────────────────────────────────
 
-const TABS = ['Übersicht', 'Verhandlung & Markt', 'Hard Facts', 'Soft Factors', 'Matchability', 'Datenqualität', 'Quelle', 'Signale'] as const
+const TABS = ['Übersicht', 'Verhandlung & Markt', 'Hard Facts', 'Soft Factors', 'Matchability', 'Datenqualität', 'Quelle', 'Signale', 'Aktivitätslog'] as const
 
 export function PropertyDetailView({ propertyId, onClose }: PropertyDetailViewProps) {
   const [tab, setTab] = useState(0)
@@ -414,6 +415,7 @@ export function PropertyDetailView({ propertyId, onClose }: PropertyDetailViewPr
         {tab === 5 && <DQPanel property={property} />}
         {tab === 6 && <ProvenancePanel property={property} />}
         {tab === 7 && <SignalsPanel signals={signals} />}
+        {tab === 8 && <PropertyActivityLogPanel propertyId={propertyId} />}
       </Box>
     </Box>
   )