Module audio 

Audio embed synthesizer.

Receives a TitleParams (Stage 2 dispatcher already parsed it), the source URL, and an AssetSnapshot. Emits final <audio> HTML — preserving the shape moss-core’s AudioRenderer used to emit before Phase 0’s Stage 1 migration.

Pre-Phase-0 reference shape (from crates/moss-core/src/resolve/embed_renderer.rs at commit 8f9b6b55a):

<audio class="moss-embed moss-embed-audio" controls preload="metadata">
  <source src="{url}" type="{mime}">
  Your browser does not support the audio tag.
</audio>

The AudioRenderer always emitted controls and preload="metadata", with a <source type="{mime}"> derived from the asset extension. Phase 1 preserves that exact byte shape; TitleParams (controls, loop, autoplay, muted, preload) currently surface no behavioral overrides because the markdown emitter does not author them — they are reserved for future param plumbing without changing the dispatcher contract.

Functions

synthesize_audio_html

Synthesize audio embed HTML for Tag::Link with moss:kind=audio title.