weirsoe-party-protocol/docs/ISSUE-260-PHONE-CLIENT-NO-AUDIO-GUARD-ARTIFACT.md

Issue #260 Artifact — Phone/client no-audio guard (primary-device only playback)

Scope

Added regression coverage for MVP audio policy to ensure phone/client flows never claim playback ownership, while primary-device playback stays unaffected.

Acceptance mapping

1. client/phone triggers no playback
   • Existing test coverage retained in player-shell.component.spec.ts:
     • does not trigger original media play during player-shell init path
     • installs secondary-device audio guard while player shell is mounted
2. primary device playback unaffected
   • New negative test in player-shell.component.spec.ts:
     • keeps primary-device playback untouched when no-audio capability is disabled
3. one negative test for phone audio
   • Existing negative path preserved:
     • does not trigger original media play during player-shell init path
4. no backend contract changes
   • Frontend test/docs-only scope; no backend contract files changed.