Mock RevenueCat Capacitor plugin in Jest setup.

Package is ESM-only; suites that import AccountContext were crashing
Jest with SyntaxError before any tests ran.

llm-fe/src/setupTests.ts

@@ -3,3 +3,16 @@
 // expect(element).toHaveTextContent(/react/i)
 // learn more: https://github.com/testing-library/jest-dom
 import '@testing-library/jest-dom';
+
+// Capacitor plugin ships ESM; Jest cannot parse it when AccountContext
+// (or pages that import it) pull in utils/revenueCat. Stub globally.
+jest.mock('@revenuecat/purchases-capacitor', () => ({
+  Purchases: {
+    configure: jest.fn(() => Promise.resolve()),
+    logIn: jest.fn(() => Promise.resolve({ customerInfo: {} })),
+    logOut: jest.fn(() => Promise.resolve({ customerInfo: {} })),
+    getOfferings: jest.fn(() => Promise.resolve({ current: null, all: {} })),
+    purchasePackage: jest.fn(() => Promise.resolve({ customerInfo: {} })),
+    restorePurchases: jest.fn(() => Promise.resolve({ customerInfo: {} })),
+  },
+}));