test: use better-auth built-in test plugin
refactor: map auth errors server side
refactor: native trusted providers callback usage
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
## Release Notes
* **New Features**
* Enhanced SSO authentication error messaging with specific guidance for different failure scenarios (account linking required, email verification needed, banned accounts, invite-only access).
* **Chores**
* Updated authentication dependencies to version 1.5.0.
* **Tests**
* Extended test coverage for SSO error code handling and authentication scenarios.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
* **Tests**
* Improved test infrastructure and organization across backup, repository, volume, and utility modules with streamlined mock setup and cleaner test patterns.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes#562
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
## Release Notes
* **New Features**
* Improved repository setup with context-aware descriptions for new vs. existing repositories
* Enhanced path handling: unique identifiers automatically appended for new repositories, exact paths preserved when importing existing ones
* **Chores**
* Updated documentation and build configuration
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
When a selected subfolder had the exact same name as its parent volume
mount, the `path.relative` check falsely identified the subfolder path
as an absolute path already inside the volume. This caused the entire
volume root to be backed up instead of the intended subfolder.
Closes#250
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved handling of backup patterns when folder names match volume names.
* Enhanced error handling for snapshot deletion operations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
* **Bug Fixes**
* Enhanced error handling in retention category calculations to gracefully handle missing or invalid repositories, ensuring the system returns safe defaults instead of failing
* Optimized repository cache validation and lookup mechanisms for improved performance
* Strengthened repository validation checks to prevent potential calculation failures
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
* feat: edit repository form
* refactor: local repo path concat as a code migration
* refactor: server constants
* chore: fix lint issue in test file
* refactor: add auth to getServerConstants
* test: backups service
* refactor: create hono app in a separate file
To avoid side effects like db migration or startup scripts when testing
test(backups): add security tests to the backups controller
* ci: run typechecks, build and tests on PR
* test: controllers security tests
* chore: update lock file
* refactor: pr feedbacks
