[ScriptedAlchemy]

Mobile kept showing threads from disconnected environments with no way to hide them. Add a saved Hide offline environments switch inside Settings → Labs → Zack settings.

Both mobile thread layouts reuse desktop's offline detection and 60-second reconnect grace period. The preference covers threads, unsent drafts, and older settled-thread counts. It persists across app restarts and is independent of the environment/project list filters. Reconnecting environments become visible automatically.

Validation: regression assertions failed on main before implementation. vp run check:changed main passed format, lint, knip, affected typechecks, focused tests, and React Compiler checks. Native iOS verification covered filtering against two isolated servers, reconnect behavior, persistence, and the Zack settings switch with offline cached threads. Claude Opus 5.5 independently inspected the full Zack page in the iPhone simulator, including light/dark layout, scrolling, saved state, and zero connected servers; no visual defects were found. Android shares the implementation but was not exercised on a device.

Before/after simulator screenshots are captured locally; GitHub attachment upload is unavailable because the upload browser is signed out.

Implemented with GPT-6 Astra (high) through the Codex harness.

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