Capture mode state lived only in React memory and was lost when
reopening a session or remounting EngineProvider.
- Add per-session localStorage capture snapshot (schema, values, links)
- Restore on session mount; persist on field/schema/link changes
- Seed binder links from storage without spurious bus events
- Clean up capture key when session is deleted
- Integration test for reload persistence
tegwick
b28feaad42