Replaces hardcoded \"https://yourapp.com\" with a Spring property.
- application.yml: app.base-url defaults to http://localhost:5173
- application-docker.yml: reads APP_BASE_URL env var, same default
- HouseholdService: injects @Value("${app.base-url}") and uses it in
toInviteResponse() to build shareUrl
- HouseholdServiceTest: sets field via ReflectionTestUtils in @BeforeEach;
adds test asserting shareUrl starts with configured base URL
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>