feat: add Maison Work source type, rename ExternalMarket to Direktinserat, hide own portfolio from demand search by default

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

src/lib/ds.ts

@@ -8,6 +8,7 @@ export const DS_COLORS = {
   resultType: {
     VERIFIED_PORTFOLIO:  { bg: 'rgba(30,58,95,0.10)',    fg: '#1e3a5f' },
     EXTERNAL_MARKET:     { bg: 'rgba(180,83,9,0.10)',    fg: '#b45309' },
+    MAISON_WORK:         { bg: 'rgba(3,105,161,0.10)',   fg: '#0369a1' },
     FUTURE_AVAILABILITY: { bg: 'rgba(109,40,217,0.10)',  fg: '#6d28d9' },
   },
   confidence: {