fix: use tsc for mobile lint-staged + fix 7 test file TS errors

- Replace eslint with tsc --noEmit in lint-staged for mobile (same as extension fix)
- Fix DonateScreen.test.tsx: add lastResult to mock type
- Fix useDeepLink.test.ts: spread, mockGetInitialURL, mockAddEventListener types
- Fix ErrorBoundary.test.tsx: info possibly undefined after array access

Author: scarface-dev1

mobile/__tests__/DonateScreen.test.tsx

@@ -52,6 +52,7 @@ jest.mock("../hooks/useBiometricAuth", () => {
     label: "Biometrics",
     authenticate: jest.fn(),
     refresh: jest.fn(),
+    lastResult: null as { success: boolean; error?: string } | null,
   };
   return {
     __esModule: true,
@@ -75,6 +76,7 @@ const bioMock = useBiometricAuth as unknown as () => {
   enrolled: boolean;
   label: string;
   authenticate: jest.Mock;
+  lastResult: { success: boolean; error?: string } | null;
 };
 
 // Stub theme so the donate screen doesn't pull in the full

mobile/__tests__/useDeepLink.test.ts

@@ -5,16 +5,16 @@
 import { renderHook, act } from "@testing-library/react-native";
 
 const mockPush = jest.fn();
-const mockGetInitialURL = jest.fn(() => Promise.resolve(null));
-const mockAddEventListener = jest.fn(() => ({ remove: jest.fn() }));
+const mockGetInitialURL = jest.fn<Promise<string | null>, []>(() => Promise.resolve(null));
+const mockAddEventListener = jest.fn(() => ({ remove: jest.fn() })) as jest.Mock;
 
 jest.mock("expo-router", () => ({
   useRouter: () => ({ push: mockPush }),
 }));
 
 jest.mock("expo-linking", () => ({
   getInitialURL: () => mockGetInitialURL(),
-  addEventListener: (...args: unknown[]) => mockAddEventListener(...args),
+  addEventListener: (...args: any[]) => mockAddEventListener(...args),
   parse: (url: string) => {
     const match = url.match(/^indigopay:\/\/(.+)/);
     return { path: match ? match[1] : null };

mobile/components/__tests__/ErrorBoundary.test.tsx

@@ -96,7 +96,7 @@ describe("ErrorBoundary", () => {
     const [error, info] = onError.mock.calls[0];
     expect(error).toBeInstanceOf(Error);
     expect(error.message).toBe("intentional render error");
-    expect(typeof info.componentStack).toBe("string");
+    expect(typeof info!.componentStack).toBe("string");
     spy.mockRestore();
   });
 
@@ -111,10 +111,12 @@ describe("ErrorBoundary", () => {
     // the mock resolves a promise we don't observe. Verify the call
     // happened with the correct arguments.
     expect(captureExceptionMock).toHaveBeenCalledTimes(1);
-    const [err, info] = captureExceptionMock.mock.calls[0];
+    const call = captureExceptionMock.mock.calls[0];
+    expect(call).toBeDefined();
+    const [err, info] = call!;
     expect(err).toBeInstanceOf(Error);
     expect(err.message).toBe("intentional render error");
-    expect(typeof info.componentStack).toBe("string");
+    expect(typeof info!.componentStack).toBe("string");
     spy.mockRestore();
   });