[beiryu]

Description

Fixes #331

The README did not say clearly which integration modes need llm.auth_token and which use the host agent's login. This PR replaces the vague note with a short comparison:

• Needs llm.auth_token: ocr review, /open-code-review:review and the open-code-review skill.
• No OCR key needed: /open-code-review:delegate-review and the open-code-review-delegate skill. They use the host agent's login.

The note links to the Claude Code install steps. The same change is applied to the zh-CN, ja-JP, ko-KR and ru-RU READMEs.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring (no functional changes)
• Documentation update
• CI / Build / Tooling

How Has This Been Tested?

This is a documentation-only change, so no test was added. I checked the diff to confirm the English text and all four translations match, and that the relative links point to plugins/open-code-review/README.md#claude-code.

• make test passes locally
• Manual testing (describe below)

Checklist

• My code follows the project's coding style (go fmt, go vet)
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or my feature works
• New and existing unit tests pass locally with my changes
• I have updated the documentation accordingly (if applicable)
• I have signed the CLA
• I did not use AI/LLM to create this PR, or I disclosed the tool/model below and reviewed its output; I did not attribute commits to AI and will answer maintainer questions and review comments myself without AI/LLM.

AI disclosure: this change was drafted with GitHub Copilot CLI (model: claude-sonnet-5.5). I reviewed it myself.

Related Issues

Fixes #331

I read the issue and saw that Team and Pro plan users cannot tell if they need a separate API key. The README did not say it clearly, so I wanted to fix that.

[github-actions]

✅ OpenCodeReview: Review skipped: no items were selected.