Merge S4-10: mark scheme editor + SpecPoint picker

- Add /exam-marker/:templateId/marks route with MarkSchemePage
- Per-Part mark scheme editor: points/levels/parts/checklist/free forms
- SpecPoint picker via GET /api/exam/specs/{spec_code}/points (falls back to manual spec_ref when endpoint 404s)
- Manual neo4j-sync button; ASSESSES edge verified in cc.public.exams
- Edit marks button on each template card in dashboard
- Merge-resolved: AppRoutes, index.ts, exam.types.ts, ExamDashboardPage (kept grouped UI + added Edit marks button)

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

src/AppRoutes.admin.test.tsx

@@ -34,6 +34,7 @@ vi.mock('./pages/tldraw/multiplayerUser', () => ({ default: () => <div>Multiplay
 vi.mock('./pages/exam', () => ({
   ExamDashboardPage: () => <div>Exam Marker</div>,
   ExamTemplateSetupPage: () => <div>Exam Template Setup</div>,
+  MarkSchemePage: () => <div>Mark Scheme editor</div>,
 }));
 vi.mock('./pages/user/calendarPage', () => ({ default: () => <div>Calendar</div> }));
 vi.mock('./pages/user/settingsPage', () => ({ default: () => <div>Settings</div> }));
@@ -125,3 +126,22 @@ describe('/admin route authorization', () => {
     expect(screen.getByText('Platform Admin Page')).toBeInTheDocument();
   });
 });
+
+
+describe('exam-marker routes', () => {
+  beforeEach(() => {
+    mockUseAuth.mockReset();
+  });
+
+  it('renders the mark scheme editor route for authenticated users', () => {
+    mockUseAuth.mockReturnValue(authState({
+      user: { id: 'teacher-1', email: '[email protected]', user_type: 'email_teacher' },
+      user_role: 'email_teacher',
+      accessToken: 'token',
+    }));
+
+    renderAt('/exam-marker/template-123/marks');
+
+    expect(screen.getByText('Mark Scheme editor')).toBeInTheDocument();
+  });
+});