[mpolakov]

This pull request introduces several improvements and fixes to better support GitHub Enterprise installations, enhance configuration flexibility, and increase test coverage for edge cases. The changes ensure the application can correctly handle both organization and enterprise scopes, especially in environments where both configuration values might be present. Additionally, the handling of GitHub App installations is made more robust, and related tests are expanded.

Enterprise and Organization Scope Handling:

• Updated logic in server/sync-entry.ts to prioritize the enterprise identifier (NUXT_PUBLIC_GITHUB_ENT) when the scope is set to 'enterprise', even if an organization variable is also set, and improved error messages for missing required variables.
• Improved resolveDisplayName in shared/utils/resolveDisplayName.ts to derive the effective scope and display name based on the actual configuration, preventing mismatches between displayed scope and identifiers.
• Added and updated tests in tests/sync-entry.spec.ts to cover cases where both org and enterprise variables are set, and to ensure proper error handling when required variables are missing. [1] [2]
• Added a test in tests/MainComponent.displayName.spec.ts to verify display name logic when both scope and identifiers are set.

GitHub App Installation Handling:

• Modified server/modules/github-app-auth.ts to support installations with enterprise accounts that use slug instead of login, and to ignore installations lacking a valid identifier. [1] [2] [3] [4]
• Updated related logic in server/utils/sync-auth.ts to safely handle installations without a login field.
• Added and improved tests in tests/github-app-auth.spec.ts and tests/sync-auth.spec.ts to cover installations with only a slug and to ensure installations without an account login are ignored. [1] [2]

Configuration and Environment Variables:

• Enhanced docker-compose.yml to provide more flexible and consistent environment variable defaults for organization/enterprise scope, GitHub App credentials, and billing variables. [1] [2]

Dependency Management:

• Removed the unnecessary brace-expansion override from package.json.

[nuggie]

see also #469