Ilia Denisov
cf70e6b1fc
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The per-screen in-memory caches (lobbycache, gamecache) were refreshed only by the screen that owns them while it was mounted, so a state change that crossed screens left the other screen's cache stale and it visibly redrew on the next navigation: - game -> lobby: the player's own move advanced the game cache but not the lobby snapshot, and an own move carries no self-directed push event, so returning to the lobby painted the pre-move status until the background refresh corrected it. - lobby -> game (and from any other screen): an opponent's move / game-over refreshed the lobby (while mounted) but never the per-game cache, so opening that game flashed the pre-move board. Make cache freshness cross-screen, owned by the single global stream handler that runs for every live event regardless of the mounted screen: - patchLobbyGame upserts the affected game's GameView into the lobby snapshot; the global handler calls it on opponent_moved / game_over / opponent_joined and on a match_found / game_started seed (so a game started elsewhere is present too). The game board still mirrors the player's own move and its own load() — the two updates no live event carries. - advanceCached (a pure wrapper over the existing delta reducers) advances a not-currently-viewed game's cache from opponent_moved / game_over; the game in view is skipped so its mounted board stays the sole owner (no double apply). End-state behaviour is unchanged (the background refresh always reconciled); this removes the transient stale frame. Unit-tested patchLobbyGame and advanceCached; docs/UI_DESIGN.md updated.