- Extract inline handleRestore mapping into snapshotToForm(snapshot, defaults) helper
- Export defaultForm from useDeploymentPageState for use in ConfigPanel
- Replace ConfigPanel stub with real read-only snapshot renderer + Snapshot/Diff toggle
- Add fieldDiff deep-equal field-walk helper with nested object + array support
- Forward optional currentForm prop through CheckpointDetailDrawer to ConfigPanel
- 13 new tests across diff.test.ts, snapshotToForm.test.ts, ConfigPanel.test.tsx (all pass)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>