Remove all deprecated Shoutrrr integration artifacts and dead legacy fallback
code from the notification subsystem.
- Remove legacySendFunc field, ErrLegacyFallbackDisabled error, and
legacyFallbackInvocationError() from notification service
- Delete ShouldUseLegacyFallback() from notification router; simplify
ShouldUseNotify() by removing now-dead providerEngine parameter
- Remove EngineLegacy engine constant; EngineNotifyV1 is the sole engine
- Remove legacy.fallback_enabled feature flag, retiredLegacyFallbackEnvAliases,
and parseFlagBool/resolveRetiredLegacyFallback helpers from flags handler
- Remove orphaned EmailRecipients field from NotificationConfig model
- Delete feature_flags_coverage_v2_test.go (tested only the retired flag path)
- Delete security_notifications_test.go.archived (stale archived file)
- Move FIREFOX_E2E_FIXES_SUMMARY.md to docs/implementation/
- Remove root-level scan artifacts tracked in error; add gitignore patterns to
prevent future tracking of trivy-report.json and related outputs
- Update ARCHITECTURE.instructions.md: Notifications row Shoutrrr → Notify
No functional changes to active notification dispatch or mail delivery.
- Enhanced Notifications component tests to include support for Discord, Gotify, and Webhook provider types.
- Updated test cases to validate the correct handling of provider type options and ensure proper payload structure during creation, preview, and testing.
- Introduced new tests for Gotify token handling and ensured sensitive information is not exposed in the UI.
- Refactored existing tests for clarity and maintainability, including improved assertions and error handling.
- Added comprehensive coverage for payload validation scenarios, including malformed requests and security checks against SSRF and oversized payloads.
- Implement tests for feature flags coverage in `feature_flags_coverage_v2_test.go` to validate behavior with invalid persisted and environment values, as well as default settings.
- Create tests in `notification_provider_patch_coverage_test.go` to ensure correct handling of notification provider updates, including blocking type mutations for non-Discord providers.
- Add tests in `security_notifications_patch_coverage_test.go` to verify deprecated headers, handle invalid CIDR warnings, and ensure correct severity handling for security events.
- Introduce migration error handling tests in `routes_coverage_test.go` to ensure graceful handling of migration errors during registration.
- Enhance `cerberus_blockers_test.go` with tests for disabled security event notifications and error handling for dispatch failures.
- Update `router_test.go` to validate notify routing based on feature flags.
- Refactor `mail_service.go` to normalize base URLs for invites, ensuring proper handling of trailing slashes.
- Modify `notification_service_json_test.go` and `notification_service_test.go` to mock Discord validation and improve webhook testing.
- Update `proxyhost_service.go` to enhance hostname validation by parsing URLs.
- Refine `uptime_service.go` to extract ports correctly from URLs, including handling edge cases.
- Enhance frontend tests in `notifications.test.ts` and `Notifications.test.tsx` to ensure correct behavior for Discord notification providers and enforce type constraints.
- Refactored notification provider tests to use Discord webhook URLs.
- Updated frontend forms and API interactions to restrict provider type to Discord.
- Modified translations to reflect the change in supported provider types.
- Enhanced UI to indicate deprecated status for non-Discord providers.
- Adjusted documentation to align with the new provider structure.
- Implemented `useManualChallenge`, `useChallengePoll`, and `useManualChallengeMutations` hooks for managing manual DNS challenges.
- Created tests for the `useManualChallenge` hooks to ensure correct fetching and mutation behavior.
- Added `ManualDNSChallenge` component for displaying challenge details and actions.
- Developed end-to-end tests for the Manual DNS Provider feature, covering provider selection, challenge UI, and accessibility compliance.
- Included error handling tests for verification failures and network errors.
- Updated UsersPage tests to check for specific URL formats instead of regex patterns.
- Increased timeout for Go coverage report generation to handle larger repositories.
- Cleaned up generated artifacts before running CodeQL analysis to reduce false positives.
- Removed outdated QA testing report for authentication fixes on the certificates page.
- Added final report confirming successful resolution of authentication issues with certificate endpoints.
- Deleted previous test output files to maintain a clean test results directory.
