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On a touch device the characters the user has typed live only in the local-echo overlay until Enter; they have never reached the PTY. The replay re-enters `selectSession` with `forceReload` on the session that is still active, and that branch nulled `activeSessionId` before `_cleanupPreviousSession` ran. The flush there is guarded on a session it can still see, so it was skipped, and the unconditional `_localEchoOverlay.clear()` that follows took the characters with it. Measured in chromium against the previous head: typing into the overlay and then making the call the replay makes left `pendingText` empty with nothing crossing into the delivery layer on either transport. The flush moves into `_flushLocalEchoTo(sessionId)`, called from both `_cleanupPreviousSession` and the `forceReload` branch before it nulls the id. The session is a parameter because the two callers mean different ones: cleanup flushes to the tab being left, the branch to the tab being reloaded. This was reachable before this branch, through the one gesture that already takes the `forceReload` path on an active session. What is new is that nothing the user does triggers it. The replay fires on its own the moment a tab switch finishes, which is exactly when someone typing into a still-loading terminal has text in the overlay, and on a phone beside an active desktop tab that is every tab switch. A seventh browser case pins it: it forces the overlay on, since headless chromium reports no touch support and the case would otherwise pass vacuously, asserts the typed characters really are sitting unsent, then triggers the replay and asserts they reached the session. Without the fix it fails with nothing delivered at all. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>