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/provider/IReminderProvider.ts

@@ -0,0 +1,11 @@
+import type { Reminder } from '../domain/reminder'
+
+export interface IReminderProvider {
+  getAll(): Promise<Reminder[]>
+  getById(id: string): Promise<Reminder | null>
+  update(id: string, data: Partial<Reminder>): Promise<Reminder>
+  complete(id: string, note?: string): Promise<Reminder>
+  dismiss(id: string, note?: string): Promise<Reminder>
+  snooze(id: string, until: string): Promise<Reminder>
+  create(data: Omit<Reminder, 'id' | 'activity' | 'createdAt' | 'updatedAt'>): Promise<Reminder>
+}

src/provider/MockupReminderProvider.ts

@@ -0,0 +1,73 @@
+import { mockReminders } from '../mock-data/reminders'
+import type { Reminder, ReminderActivity } from '../domain/reminder'
+import { ReminderStatus } from '../domain/reminder'
+import type { IReminderProvider } from './IReminderProvider'
+
+let store: Reminder[] = [...mockReminders]
+
+function now(): string {
+  return new Date().toISOString()
+}
+
+function addActivity(reminder: Reminder, entry: ReminderActivity): Reminder {
+  return { ...reminder, activity: [...reminder.activity, entry], updatedAt: now() }
+}
+
+export const MockupReminderProvider: IReminderProvider = {
+  async getAll() {
+    return [...store]
+  },
+
+  async getById(id) {
+    return store.find(r => r.id === id) ?? null
+  },
+
+  async update(id, data) {
+    const idx = store.findIndex(r => r.id === id)
+    if (idx === -1) throw new Error(`Reminder ${id} not found`)
+    store[idx] = { ...store[idx], ...data, updatedAt: now() }
+    return store[idx]
+  },
+
+  async complete(id, note) {
+    const idx = store.findIndex(r => r.id === id)
+    if (idx === -1) throw new Error(`Reminder ${id} not found`)
+    store[idx] = addActivity(
+      { ...store[idx], status: ReminderStatus.COMPLETED },
+      { at: now(), by: 'current-user', action: 'COMPLETED', note },
+    )
+    return store[idx]
+  },
+
+  async dismiss(id, note) {
+    const idx = store.findIndex(r => r.id === id)
+    if (idx === -1) throw new Error(`Reminder ${id} not found`)
+    store[idx] = addActivity(
+      { ...store[idx], status: ReminderStatus.DISMISSED },
+      { at: now(), by: 'current-user', action: 'DISMISSED', note },
+    )
+    return store[idx]
+  },
+
+  async snooze(id, until) {
+    const idx = store.findIndex(r => r.id === id)
+    if (idx === -1) throw new Error(`Reminder ${id} not found`)
+    store[idx] = addActivity(
+      { ...store[idx], status: ReminderStatus.SNOOZED, snoozedUntil: until },
+      { at: now(), by: 'current-user', action: 'SNOOZED', note: `Snoozed until ${until}` },
+    )
+    return store[idx]
+  },
+
+  async create(data) {
+    const reminder: Reminder = {
+      ...data,
+      id: crypto.randomUUID(),
+      activity: [{ at: now(), by: 'current-user', action: 'CREATED' }],
+      createdAt: now(),
+      updatedAt: now(),
+    }
+    store.push(reminder)
+    return reminder
+  },
+}