Server: - Add split_depth and loop_depth columns (V9 migration) - Persist splitDepth/loopDepth with reflection fallback for older agent versions UI: - Detect iterations via wrapper processorTypes (loopIteration, splitIteration, multicastBranch) - Filter overlay by selected iteration at the wrapper level - Skip non-selected iteration wrappers entirely (wrapper + children) - Don't add synthetic wrappers to overlay (no diagram node correspondence) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>