Data + dedup logic for the speaker-avatar reaction overlay (T1 #3):
RoomReaction — one ephemeral kind-7 reaction. Carries the
source pubkey, the target pubkey (null for
room-wide), the emoji/content, and the
createdAt second. Standard data-class equality
so the StateFlow can suppress no-op tick
re-emits via map.equals.
RoomReactionsAggregator
— `apply(event, nowSec, windowSec)` records a
fresh reaction and returns the post-evict
Map<targetPubkey, List<RoomReaction>>.
`evictAndSnapshot(olderThanSec)` is the
per-tick sweep — caller drives the cadence
(typically every second so the floating-up
animation frame rate is set by the eviction
tick rather than per-component timers).
Room-wide reactions (no `p` tag) land under
the empty-string key so the value-type stays
uniform.
Tests cover:
* Tag projection (with + without `p` target)
* Multi-source grouping by target speaker
* Window-edge eviction (a reaction at T=70 is gone at now=110,
window=30; a reaction at T=105 stays)
* Empty-string key for room-wide reactions
* Idempotent eviction snapshot — same input twice produces equal
Maps so the UI doesn't recompose on no-op ticks
Zap reactions (kind 9735) carry an amount + zapper that aren't in
the v1 RoomReaction shape; that's a follow-up if/when the UI grows
a "satoshi rain" treatment. The ledger stays generic on `content` so
adding it later is additive.
Claude
87a54bf479