- Deduplicate API calls: syncStackPRs now returns PRDetails for
LoadBranchNodes to reuse, eliminating redundant FindPRDetailsForBranch calls
- Parallelize API calls in syncStackPRs (capped at 6 concurrent requests)
- Parallelize git operations in LoadBranchNodes (capped at 4 concurrent)
- Show "Loading stack..." indicator for interactive sessions
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>