Review PR Comments

Review unresolved comments on the GitHub pull request associated with the current branch. Validate each comment, then fix legitimate issues.

Step 1 — Identify the Pull Request

1. If $ARGUMENTS contains a PR number, use it.
2. Otherwise, detect the current git branch and find its open PR:

   gh pr view --json number,url,headRefName,baseRefName
   

3. If no PR is found, stop and tell the user.

Step 2 — Fetch All Unresolved Review Comments

Fetch PR review comments (not issue-level comments) using the GitHub CLI: