docs: add PR workflow rules to CLAUDE.md

[let-sunny]

Summary

• Add PR workflow conventions to CLAUDE.md under the Conventions section
• Documents the draft PR lifecycle, CodeRabbit review monitoring, rate limit handling, and merge approval process
• Separated from fix: add layout rule exceptions for icons, backgrounds, images, text #100 for cleaner scope

Changes

New ### PR Workflow subsection with 6 rules:

1. Draft-first PR creation
2. Draft conversion on changes
3. subscribe_pr_activity for real-time monitoring
4. CodeRabbit rate limit handling (empty commit re-trigger)
5. Immediate review comment addressing
6. Squash merge with explicit user approval

Made with Cursor

Summary by CodeRabbit

• Documentation
  • Updated internal PR workflow documentation to establish explicit control-flow procedures. New guidelines cover draft PR practices, real-time review and CI monitoring, handling rate-limit messaging with re-trigger options, systematic review comment processing, and explicit approval enforcement before merging.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 9cad4439-037d-46b5-8347-e67656ca7a30

📥 Commits

Reviewing files that changed from the base of the PR and between 6c02581 and 64053e9.

📒 Files selected for processing (1)

• CLAUDE.md

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📝 Walkthrough

Walkthrough

Added a new PR Workflow section to CLAUDE.md documenting an explicit control flow for pull request management, including draft creation, activity monitoring with subscribe_pr_activity, CI/rate-limit handling, review comment addressing, and explicit user approval before merging with squash and branch deletion.

Changes

Cohort / File(s)	Summary
Documentation CLAUDE.md	Added new PR Workflow section describing pull request handling procedures, including draft management, real-time monitoring, rate-limit messaging, and merge approval process.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A workflow so clear, now written in stone,
Draft, review, and merge—step by step, fully known!
CodeRabbit watches, CI confirms the way,
Explicit approval leads to merge day! 📋✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/pr-workflow-rules

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