fix: extend PR branch setup to all PR event types in claude review

The Setup PR Branch workaround only ran for issue_comment events,
causing claude-code-action to fail with "couldn't find remote ref
pull/N/head" on pull_request_target and other PR events. Extend the
condition to cover all PR-related event types.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Quanyi Ma <eli@patch.sh>

Author: genedna

.github/workflows/claude-review.yml

@@ -89,9 +89,13 @@ jobs:
       # We create the branch from the current HEAD (which is the secure, verified SHA checked out above)
       # This avoids fetching mutable refs from the network, addressing the "Untrusted Checkout" vulnerability
       - name: Setup PR Branch
-        if: github.event_name == 'issue_comment' && github.event.issue.pull_request
+        if: |
+          (github.event_name == 'issue_comment' && github.event.issue.pull_request) ||
+          github.event_name == 'pull_request_target' ||
+          github.event_name == 'pull_request_review_comment' ||
+          github.event_name == 'pull_request_review'
         env:
-          PR_NUMBER: ${{ github.event.issue.number }}
+          PR_NUMBER: ${{ github.event.pull_request.number || github.event.issue.number }}
         run: |
           echo "Setting up local PR branch pr-$PR_NUMBER..."
           git checkout -b pr-$PR_NUMBER