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/hooks/useReminders.ts

@@ -0,0 +1,72 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
+import { reminderService } from '../services/reminderService'
+
+export function useReminders() {
+  return useQuery({
+    queryKey: ['reminders'],
+    queryFn: reminderService.getAll,
+  })
+}
+
+export function useReminder(id: string) {
+  return useQuery({
+    queryKey: ['reminder', id],
+    queryFn: () => reminderService.getById(id),
+    enabled: !!id,
+  })
+}
+
+export function useReminderInsights() {
+  return useQuery({
+    queryKey: ['reminder-insights'],
+    queryFn: reminderService.getInsights,
+  })
+}
+
+export function useCompleteReminder() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ id, note }: { id: string; note?: string }) =>
+      reminderService.complete(id, note),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['reminders'] })
+      queryClient.invalidateQueries({ queryKey: ['reminder-insights'] })
+    },
+  })
+}
+
+export function useDismissReminder() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ id, note }: { id: string; note?: string }) =>
+      reminderService.dismiss(id, note),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['reminders'] })
+      queryClient.invalidateQueries({ queryKey: ['reminder-insights'] })
+    },
+  })
+}
+
+export function useSnoozeReminder() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ id, until }: { id: string; until: string }) =>
+      reminderService.snooze(id, until),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['reminders'] })
+      queryClient.invalidateQueries({ queryKey: ['reminder-insights'] })
+    },
+  })
+}
+
+export function useUpdateReminder() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: Partial<import('../domain/reminder').Reminder> }) =>
+      reminderService.update(id, data),
+    onSuccess: (_result, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['reminders'] })
+      queryClient.invalidateQueries({ queryKey: ['reminder', id] })
+    },
+  })
+}