Sprint 5: User profile menu, preferences, org member management, v0.2.0

- Move Settings from sidebar Admin section to User Profile dropdown menu
- Add User Preferences page (placeholder for future: dark mode, timezone,
  notifications, feature visibility)
- Add Manage Members page for tenant admins to invite/manage board members:
  - List all org members with roles, status, join date, last login
  - Add new members (creates user account + org membership)
  - Change member roles (president, treasurer, secretary, board member,
    property manager, viewer)
  - Remove members (soft-deactivate)
  - Role-gated: only president, admin, treasurer can manage members
- Backend: new org member management endpoints on OrganizationsController
  - GET /organizations/members
  - POST /organizations/members
  - PUT /organizations/members/:id/role
  - DELETE /organizations/members/:id
- Bump version to 0.2.0 MVP_P2 (package.json + Settings page)

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

frontend/src/App.tsx

@@ -23,6 +23,8 @@ import { CashFlowPage } from './pages/reports/CashFlowPage';
 import { AgingReportPage } from './pages/reports/AgingReportPage';
 import { YearEndPage } from './pages/reports/YearEndPage';
 import { SettingsPage } from './pages/settings/SettingsPage';
+import { UserPreferencesPage } from './pages/preferences/UserPreferencesPage';
+import { OrgMembersPage } from './pages/org-members/OrgMembersPage';
 import { AdminPage } from './pages/admin/AdminPage';
 import { AssessmentGroupsPage } from './pages/assessment-groups/AssessmentGroupsPage';
 import { CashFlowForecastPage } from './pages/cash-flow/CashFlowForecastPage';
@@ -124,6 +126,8 @@ export function App() {
         <Route path="reports/sankey" element={<SankeyPage />} />
         <Route path="reports/year-end" element={<YearEndPage />} />
         <Route path="settings" element={<SettingsPage />} />
+        <Route path="preferences" element={<UserPreferencesPage />} />
+        <Route path="org-members" element={<OrgMembersPage />} />
       </Route>
     </Routes>
   );