Add Super Admin AI prompt templates and business assignment UI.

Templates library plus per-business prompt list with edit, copy public link, and remove.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/super-admin/src/App.tsx

@@ -16,6 +16,7 @@ import { InvoiceTemplateEditorPage } from './pages/InvoiceTemplateEditorPage'
 import { IssueInvoicePage } from './pages/IssueInvoicePage'
 import { PublicInvoicePage } from './pages/PublicInvoicePage'
 import { ProfilePage } from './pages/ProfilePage'
+import { TemplatesPage } from './pages/TemplatesPage'
 import { LoginPage } from './pages/LoginPage'
 
 function ProtectedPages() {
@@ -59,6 +60,7 @@ function App() {
                     />
                     <Route path="users" element={<UsersPage />} />
                     <Route path="websites" element={<WebsitesPage />} />
+                    <Route path="templates" element={<TemplatesPage />} />
                     <Route path="settings" element={<SettingsPage />} />
                     <Route
                       path="settings/invoice-templates/new"