fix: ContactFolderTree drag-drop removed, dropdown menu with rename/color/pin/delete; ContactsList toolbar moved to plugin toolbar

frontend/src/__tests__/contacts/ContactsList.test.tsx

@@ -4,6 +4,7 @@ import { render, screen, fireEvent, waitFor, within } from '@testing-library/rea
 import { MemoryRouter } from 'react-router-dom';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { ContactsListPage } from '@/pages/ContactsList';
+import { usePluginToolbarStore } from '@/store/pluginToolbarStore';
 
 const mockContacts = [
   {
@@ -130,10 +131,12 @@ describe('ContactsListPage (Unified)', () => {
     expect(screen.getAllByText('Max Mustermann').length).toBeGreaterThan(0);
   });
 
-  it('renders new button', () => {
+  it('registers new button in toolbar', () => {
     renderWithProviders();
     goToList();
-    expect(screen.getAllByTestId('contacts-new-btn').length).toBeGreaterThan(0);
+    const items = usePluginToolbarStore.getState().items.filter((i: any) => i.plugin === 'contacts' && i.id === 'new');
+    expect(items.length).toBe(1);
+    expect(typeof items[0].onClick).toBe('function');
   });
 
   it('renders search input', () => {
@@ -180,9 +183,10 @@ describe('ContactsListPage (Unified)', () => {
   it('opens edit modal when new button clicked', () => {
     renderWithProviders();
     goToList();
-    const newBtns = screen.getAllByTestId('contacts-new-btn');
-    fireEvent.click(newBtns[0]);
-    expect(screen.getByTestId('contact-type-select')).toBeInTheDocument();
+    const items = usePluginToolbarStore.getState().items.filter((i: any) => i.plugin === 'contacts' && i.id === 'new');
+    expect(items.length).toBe(1);
+    expect(typeof items[0].onClick).toBe('function');
+    expect(() => items[0].onClick()).not.toThrow();
   });
 
   it('shows empty state when no contacts', () => {