Fix biometric auth TypeScript errors

- Add LOGIN_BIOMETRIC to AuditAction enum
- Import AuditAction and EntityType in AuthService
- Fix loginWithExternalAuth return type to match AuthResponse interface
- Update biometric API client to use correct response structure
- Update login page to access tokens from nested data structure

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-web/app/(auth)/login/page.tsx

@@ -91,7 +91,7 @@ export default function LoginPage() {
       );
 
       // Store tokens and navigate
-      tokenStorage.setTokens(result.tokens.accessToken, result.tokens.refreshToken);
+      tokenStorage.setTokens(result.data.tokens.accessToken, result.data.tokens.refreshToken);
       router.push('/');
     } catch (err: any) {
       console.error('Biometric login failed:', err);

maternal-web/lib/api/biometric.ts

@@ -76,7 +76,7 @@ export const biometricApi = {
     response: any,
     email?: string,
     deviceInfo?: { deviceId: string; platform: string }
-  ): Promise<{ success: boolean; message: string; user: any; tokens: any }> {
+  ): Promise<{ success: boolean; data: { user: any; tokens: any; deviceRegistered: boolean; deviceTrusted: boolean } }> {
     const verifyResponse = await axios.post(
       `${API_BASE_URL}/api/v1/auth/biometric/authenticate/verify`,
       { response, email, deviceInfo }