Fix: Extract owner/repo from URL instead of head repository fields

The script was extracting owner and repo from headRepositoryOwner and
headRepository, which refer to the fork (source) repository. For fork PRs,
this caused all API calls to target the wrong repository since PRs live on
the base (target) repository.

Fixed by parsing owner and repo from the URL field, which always points to
the base repository where the PR actually exists.

Author: cursoragent

.cursor/skills/gh-review/scripts/gh-review.sh

@@ -25,14 +25,15 @@ cmd_start() {
   local pr="${1:?PR number required}"
 
   local pr_json
-  pr_json=$(gh pr view "$pr" --json number,headRefOid,headRepository,headRepositoryOwner,url)
+  pr_json=$(gh pr view "$pr" --json number,headRefOid,url)
 
   local number head_sha owner repo url
   number=$(echo "$pr_json" | jq -r '.number')
   head_sha=$(echo "$pr_json" | jq -r '.headRefOid')
-  owner=$(echo "$pr_json" | jq -r '.headRepositoryOwner.login')
-  repo=$(echo "$pr_json" | jq -r '.headRepository.name')
   url=$(echo "$pr_json" | jq -r '.url')
+  # Parse owner and repo from URL which always points to the base repository
+  owner=$(echo "$url" | sed -E 's|https://github.com/([^/]+)/([^/]+)/pull/[0-9]+.*|\1|')
+  repo=$(echo "$url" | sed -E 's|https://github.com/([^/]+)/([^/]+)/pull/[0-9]+.*|\2|')
 
   local pending
   pending=$(gh api graphql -f query='