feat: Reminder Manager + Schattenmarkt-Freigabe + mock data overhaul

- Add Reminder Manager page (/supply/reminder-manager) with KPI bar,
  filter bar, list/card feed, and detail drawer (7 sections incl.
  activity log, snooze, complete, dismiss actions)
- Add Schattenmarkt-Freigabe toggle on PropertyDetailView: Verwaltung
  can opt-in properties for early market exposure before contract expiry
- Auto-generate FutureSignal cards via useSchattenmarktSignals hook
  when leaseEndDate - leadTimeMonths <= MOCK_TODAY
- Fix useUnifiedResults: use property.resultType as fallback (was
  defaulting everything to VERIFIED_PORTFOLIO)
- Fix demand Results: hide VERIFIED_PORTFOLIO from non-manager users
  even when showOwnProperties toggle was previously enabled
- Fix AppShell: redirect to allowed workspace on user role switch
- Fix 3 wrong match scores (match-002: 93→62, match-009: 86→55,
  match-017: 87→52)
- Add 7 new match records (match-050–056) for need-001, need-002,
  need-011
- Add need-011 (Retail Bern Innenstadt)
- Add prop-031–036 (EXTERNAL_MARKET / MAISON_WORK / FUTURE_AVAILABILITY)
- Fix duplicate image URLs across all properties
- Add signal-011 (Bern Altstadt, Mode Boutique) + propertyId to
  signal-001

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

src/mock-data/needs.ts

@@ -345,6 +345,45 @@ export const mockNeeds: Need[] = [
     updatedAt: '2025-04-18T09:00:00Z',
   },
 
+  // --- need-011: Stadtladen Bern GmbH — RETAIL Bern Innenstadt ---
+  {
+    id: 'need-011',
+    companyName: 'Stadtladen Bern GmbH',
+    contactName: 'Katrin Müller',
+    assetType: AssetType.RETAIL,
+    requiredArea: { min: 200, max: 400 },
+    preferredLocations: ['Bern Innenstadt', 'Bern Altstadt', 'Bern Marktgasse'],
+    excludedLocations: [],
+    budgetRange: { maxPerSqm: 1800, currency: 'CHF' },
+    timing: {
+      earliestMoveIn: '2025-09-01',
+      latestMoveIn: '2026-03-01',
+      contractDurationMonths: 48,
+      flexibleTiming: false,
+    },
+    mustCriteriaText: ['Fussgängerzone', 'Schaufensterfront', 'Erdgeschoss', 'Laufkundschaft'],
+    softFactors: {
+      minPrestige: 80,
+      requireParking: false,
+      maxPublicTransportMinutes: 5,
+    },
+    weightingProfile: {
+      area: 0.15,
+      location: 0.35,
+      budget: 0.15,
+      timing: 0.10,
+      prestige: 0.15,
+      accessibility: 0.05,
+      expansionPotential: 0.02,
+      flexibility: 0.03,
+    },
+    confidenceInCriteria: 0.92,
+    extractedFromText: 'Suche Retailfläche in Bern Innenstadt, 200–400m², Schaufensterfront, Fussgängerzone, max. CHF 150/m².',
+    organizationId: 'org-wincasa',
+    createdAt: '2025-05-18T10:00:00Z',
+    updatedAt: '2025-05-18T10:00:00Z',
+  },
+
   // --- need-010: St.Galler Büros AG — OFFICE St.Gallen ---
   {
     id: 'need-010',