v0.0.47: integrate 6 WZP audio variants into featherChat calls

startAudio() now dynamically loads the selected WZP client variant:
- /audio-variant [pure|hybrid|full|ws|ws-fec|ws-full]
- Loads variant JS from wzp-web's /audio/js/ path via Caddy
- Falls back to inline pure implementation if variant fails to load
- Variant persisted in localStorage across sessions
- Call bar shows active variant: "In call [ws-fec] with 0x..."

Variants:
  pure     — raw PCM over WS (bridge needed, no WASM)
  hybrid   — raw PCM + WASM FEC over WS (bridge needed)
  full     — WebTransport + FEC + crypto (no bridge, future)
  ws       — WZP protocol over WS (relay direct)
  ws-fec   — WZP + WASM FEC over WS (relay direct)
  ws-full  — WZP + FEC + E2E crypto over WS (relay direct)

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

warzone/deploy/docker/Caddyfile

@@ -2,16 +2,23 @@
 	email admin@manko.yoga
 }
 
+# Wildcard cert for all subdomains
+*.voip.manko.yoga {
+	tls {
+		dns cloudflare {$CF_API_TOKEN}
+	}
+	reverse_proxy wzp-web:8080
+}
+
+# Main domain — featherChat server
 voip.manko.yoga {
 	tls {
 		dns cloudflare {$CF_API_TOKEN}
 	}
 
-	# Audio bridge WebSocket (wzp-web)
 	handle_path /audio/* {
 		reverse_proxy wzp-web:8080
 	}
 
-	# Everything else → featherChat server
 	reverse_proxy warzone-server:7700
 }