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weishu
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HapiProtocol/Window/ — pure port of web/src/lib/message-window-store.ts + messages.ts, mirroring the Android reference port 1:1: - MessageWindowState: constants (400/600/800/800/200), MessagePosition, OlderLoadOutcome, full InternalState fields, persisted v2 snapshot shape - MessageWindowLogic: every transition (merge/trim preserving queued rows, latest replace with request-baseline identity preservation, tail sync begin/apply/finish, older pages + epoch-mismatch reset, enterTailMode that deliberately keeps requiresLatestReset, activate, SSE ingest with hidden-row cursor advance, markConsumed stamping server rows to 'sent', optimistic lifecycle, queued reconcile, hydrate/persist, seededState) - MessageMerge: position comparator (ASCII tie-break), localId echo replacement preserving status/invokedAt, 10s sent-dedup fallback - MessageRetention: calls the fixtures-green chat pipeline's normalizeDecryptedMessage directly (no hand-mirrored tree to drift) - WindowMessage: identity-carrying final class (web's !== baseline classification), tri-state invokedAt, buildOptimisticMessage HapiClient/Stores/ — async half: - MessagesProviding seam (three-variant MessagesPageQuery; APIClient conforms via its existing endpoints) - MessageWindowController actor: single-flight tail controller with trailing drain and a synchronous generation bump before the first await (the web runs to its first suspension; Android used UNDISPATCHED), fetchOlder with onBeforeApply veto, SSE hooks, optimistic append/status/ cancel-invoked, queued-state reconciliation in 1000-id batches, seedFrom - WindowSnapshotStore: per-session JSON snapshots, LRU 10 (dedup TODO with the session-list package's cache) + MessageWindowControllers registry Tests (swift-testing): - PaginationFixtureTests: parameterized replay of shared/fixtures/ pagination/*.json against the real controller via a scripted provider; asserts expectedRequests (canonical JSON incl. explicit-null untils), expectedOutcome, expectedCandidates, and the final expectedState projection with per-op labels and first-differing-line diffs - MessageWindowControllerTests: tail-sync coalescing + trailing drain, concurrent-SSE preservation across a reset replace, cursor-no-advance guard, snapshot round-trip/LRU, seedFrom All 11 fixtures verified green against a line-by-line Python mirror of these exact algorithms (no local Swift toolchain; CI runs the real suite).