[codex] add CLI e2e tests

[haltakov]

What changed

Adds a new Jest-based CLI end-to-end suite for the gallery package. The suite exercises real CLI commands against isolated temp directories and validates user-facing generated artifacts.

Coverage includes:

• documented two-command quick start
• current-working-directory defaults and short aliases
• CDN --base-url and --thumbs-base-url rendering
• recursive subgallery navigation and child gallery output
• build scan, --no-scan, and --prune behavior
• thumbnail config passed through real CLI flags
• non-interactive safety guardrails for overwrites, photo copying, and clean --all
• help output, invalid option handling, telemetry preference persistence
• built dist CLI smoke including create-theme

Why

The existing tests cover many module-level and happy-path flows, but there were still CLI contract gaps around command parsing, defaults, generated HTML URLs, packaged output, and non-interactive behavior. These tests increase confidence that user workflows keep working and CLI changes do not silently break documented behavior.

Validation

• yarn check
• yarn test tests/cli-e2e.test.ts --runInBand
• yarn test --runInBand

Final full test result: 16 suites passed, 156 tests passed.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 7ef48de21e

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".