~anthropic/claude-sonnet-latest → B (4:6)

Side A adds a large invite feature with real working mint/redeem/audit flow and end-to-end tests, but it also introduces substantial dead scaffolding — Event::InviteMinted/InviteRedeemed, ActiveInviteState, room_timeline, and an entire new timeline.rs module — none of which are ever wired into the actual RPC/reducer flow (invites are minted/redeemed purely via the separate ephemeral state.invites map), leaving confusing, unused duplicate machinery. Side B is a smaller but coherent and fully-integrated fix: it makes block masking deterministic/typed, correctly tokenizes prose item refs (fixing real link/URL-boundary/code-fence bugs), tightens DSL item-body rules, and backs every change with focused unit tests, with no orphaned code paths.