release: ship T4 Code v0.1.19 on appserver-2

[lyc-aon]

Summary

• Show accepted prompts immediately and preserve them through reconnect, replay, and context compaction without duplicate sends.
• Reconcile sidebar activity from authoritative session inventory, expose compaction state, and collapse duplicate recovery notices.
• Render semantic tool, plan, todo, collaboration, child-agent, and transcript-image events with bounded client retention.
• Bound terminal, file, transcript-image, and projection-cache memory across warm sessions, including stalled reads and digest finalization.
• Ship user-initiated verified desktop and Android updates, split CI behind one required verify check, and require exact-main-SHA CI before release publication.
• Pin the public OMP 17 appserver-2 runtime at 3cba4bda41d2b8e4d304c43471735657893d3b62.

Local release gate

• pnpm check
• pnpm test: 1,070 passed
• pnpm build
• pnpm test:e2e: 17 passed
• Android debug: 19 unit tests, lintDebug, assembleDebug
• pnpm test:packaging: 37 passed
• pnpm test:tooling: 220 passed
• Linux deb and AppImage packaged and inspected; updater metadata verified
• Independent final diff review: no remaining P0-P2 findings
• git diff --check