Add optional label gate for PR Visual Recap

[CheckPickerUpper]

Summary

• add VISUAL_RECAP_REQUIRED_LABELS / reusable required-labels so recaps can be opt-in by PR label
• include the labeled pull_request event so applying an allowed label starts the recap immediately
• update setup/generated reusable caller docs, add gate tests, and add a recap-cli changeset

Verification

• pnpm --dir packages/recap-cli test
• pnpm --dir packages/recap-cli typecheck
• pnpm --dir packages/recap-cli build
• git diff --check

Notes

• English docs are updated; localized pr-visual-recap.mdx copies still need the new variable translated in a localization follow-up.

[github-actions]

Visual recap — skipped

The visual recap job did not run for this pull request. This is informational only and does not block the PR.

Recap skipped for 470f4af: external fork PR requires a maintainer to apply the recap label to the current head SHA.

[steve8708]

thanks @CheckPickerUpper! couple AI review comments worth taking a look at

[builder-io-integration]

Builder reviewed your changes — looks good ✅

Review Details

Incremental Code Review Summary

Reviewed the latest PR head after the workflow-generation fixes. Both previously reported issues are resolved: the CLI-generated reusable caller now derives its labeled-event condition from whether the configured label value is present, and the skills installer now emits the labeled/closed triggers plus the required-labels forwarding. I resolved both stale review threads before submitting this review.

The latest diff also updates all localized workflow snippets, expands installer and builder tests for label-trigger behavior, and preserves the case-insensitive OR matching in the gate implementation. No additional confirmed bugs were found by the available review workers. Risk level: standard. 🧪 Browser testing: Skipped — PR only modifies backend/config/docs/tests, no UI impact.