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.lock

@@ -2956,7 +2956,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-client"
-version = "0.0.42"
+version = "0.0.43"
 dependencies = [
  "anyhow",
  "argon2",
@@ -2989,7 +2989,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-mule"
-version = "0.0.42"
+version = "0.0.43"
 dependencies = [
  "anyhow",
  "clap",
@@ -2998,7 +2998,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-protocol"
-version = "0.0.42"
+version = "0.0.43"
 dependencies = [
  "base64",
  "bincode",
@@ -3023,7 +3023,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-server"
-version = "0.0.42"
+version = "0.0.43"
 dependencies = [
  "anyhow",
  "axum",
@@ -3054,7 +3054,7 @@ dependencies = [
 
 [[package]]
 name = "warzone-wasm"
-version = "0.0.42"
+version = "0.0.43"
 dependencies = [
  "base64",
  "bincode",