Speak exercise setup and form cues aloud with AVSpeechSynthesizer:
- Library detail: a speaker toolbar button reads the full reference aloud.
- Active workout: an opt-in "Speak Exercise Cues" setting speaks a brief
cue (Setup/Execution/Cues) when an exercise starts, hands-free.
- Settings › Voice: pick the voice (auto-prefers an installed enhanced/
premium English voice), a premium-download nudge shown only while on a
basic voice, and a Speed/Pitch/Volume sheet with Reset to Defaults.
On-device and offline; ducks other audio rather than stopping it. iPhone
only for now. Shared SpeechSettings is the single source of truth for the
voice/prosody, read fresh per utterance so changes preview live.
Claude-Session: https://claude.ai/code/session_01BQcEWmAPA78338QuEwRkAh
