[viralcodex]

Changes

• Share H.264 decoding across Android and iOS, including native AVCC normalization.
• Make decoder generations and terminal viewer disposal explicit.
• Bound video backpressure, keep resets video-only, and rotate isolated viewer credentials when capture changes.
• Retain retryable helper stops and cancellable HID input.
• Consolidate old decoder tests into transition tables and rebuild the shipped bundles.

Verification

• Exact PR tree: release:check passes on Node 24.13.0.
• 251 tests pass, one existing Bun-only skip.
• Installed-package server and GUI loading pass.

Sequence

1 of 3. Native/controller lifecycle and desktop watcher recovery follow in separate PRs.

[viralcodex]

Reviewed the transport/token boundary, decoder replacement and terminal disposal paths, cancellation before/after HID dispatch, backpressure recovery, and cleanup ownership. Exact-tree release validation passes locally and in Linux CI: https://github.com/viralcodex/opencode-demul/actions/runs/42027129695. Existing lifecycle tests were consolidated without dropping distinct transition cases.