v0.0.43: FC-P3-T4 — voice calls via WZP audio bridge

Web client:
- After call goes "active", connects to WZP web bridge WS
- Mic capture: getUserMedia → ScriptProcessor → PCM int16 frames → WS
- Playback: WS → PCM int16 → Float32 → AudioContext.createBufferSource
- Room name derived from peer fingerprint (deterministic)
- Relay address fetched from /v1/wzp/relay-config
- Audio auto-starts on accept/answer, auto-stops on hangup/reject
- startAudio()/stopAudio() manage full lifecycle

TUI:
- /call shows "Audio: use web client for voice (TUI audio coming soon)"
- Signaling works, audio requires web client for now

This completes the last critical task — voice calls work end-to-end:
  User A calls → signaling via featherChat WS → User B accepts →
  both connect to WZP relay → audio flows

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/Cargo.toml

@@ -9,7 +9,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.0.42"
+version = "0.0.43"
 edition = "2021"
 license = "MIT"
 rust-version = "1.75"