Flowchart delivery and shared-space reliability
- Added and verified a real canvas flowchart in FlowGarden using connected boxes and arrows (not slides).
- Fixed shared-room snapshot overwrite behavior so older sparse updates no longer wipe newer richer canvas content.
- Hardened collaborative snapshot sync to preserve intentional deletions and reduce stale-state reappearing issues.
- Improved Ideas + Bugs follow-through by shipping and validating fixes directly against the live shared space link.