feat: expand NewListing with AI, soft factors, hard facts, images + MyListings manager

- KI-Hilfe: text description → auto-fills all fields (parseListingText mock parser)
- Lage & Ausstrahlung: 9 soft factor selects (Tief/Mittel/Hoch) mapped to scoring engine
- Technische Details: floor, fit-out, parking, ceiling height
- Bilder: URL list with add/remove
- New /supply/my-listings page: list, status toggle, delete for DIRECT listings
- Added sourceType filter to PropertyFilters + MockupPropertyProvider
- Nav entry "Meine Inserate" added to supply sidebar

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

src/App.tsx

@@ -28,6 +28,7 @@ const DataQuality = lazy(() => import('./pages/supply/DataQuality'))
 const ReminderManager = lazy(() => import('./pages/supply/ReminderManager'))
 const MarketLeads = lazy(() => import('./pages/supply/MarketLeads'))
 const NewListing = lazy(() => import('./pages/supply/NewListing'))
+const MyListings = lazy(() => import('./pages/supply/MyListings'))
 
 const AISearch = lazy(() => import('./pages/demand/AISearch'))
 const Results = lazy(() => import('./pages/demand/Results'))
@@ -64,6 +65,7 @@ function App() {
                 <Route path="/supply/market-leads" element={<MarketLeads />} />
                 <Route path="/supply/market-intelligence" element={<MarketIntelligence />} />
                 <Route path="/supply/new-listing" element={<NewListing />} />
+                <Route path="/supply/my-listings" element={<MyListings />} />
               </Route>
 
               {/* Demand Workspace */}