Add store installments module with calculator and public API docs.

Business dashboard can manage credit methods and preview plans; cropper and module flags support the new flow.

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

apps/business/src/App.tsx

@@ -37,6 +37,8 @@ import { OrdersPage } from './pages/OrdersPage'
 import { LoginPage } from './pages/LoginPage'
 import { ShoppingCardsPage } from './pages/ShoppingCardsPage'
 import { StoreSettingsPage } from './pages/StoreSettingsPage'
+import { StoreInstallmentsPage } from './pages/StoreInstallmentsPage'
+import { AddStoreInstallmentPage } from './pages/AddStoreInstallmentPage'
 import { BlogPage } from './pages/BlogPage'
 import { BlogListPage } from './pages/BlogListPage'
 import { AddNewBlogPage } from './pages/AddNewBlogPage'
@@ -110,6 +112,9 @@ function App() {
               <Route path="store/items" element={<StoreItemsPage />} />
               <Route path="store/orders" element={<OrdersPage />} />
               <Route path="store/cards" element={<ShoppingCardsPage />} />
+              <Route path="store/installments" element={<StoreInstallmentsPage />} />
+              <Route path="store/installments/new" element={<AddStoreInstallmentPage />} />
+              <Route path="store/installments/edit/:id" element={<AddStoreInstallmentPage />} />
               <Route path="store/settings" element={<StoreSettingsPage />} />
               <Route path="customers" element={<CustomersPage />} />
               <Route path="finance" element={<FinancePage />} />