Current topic: "Propose Fixes for Review Comments"
Topic summary: I have reviewed the PR comments and examined the affected files. I've formulated a straightforward plan to address the requested changes: updating visibility in ServiceBookApplication, refactoring the related test, using the application context for Sentry settings in the ViewModel, changing the test crash button style, and renaming the test. I will now present this plan to the user for informal agreement before creating the formal plan document.

Strategic Intent: Propose a plan to fix the review comments and wait for user confirmation.