feat(voice): add iOS VAD runtime support

crates/chanora_audio/Cargo.toml

@@ -44,6 +44,22 @@ reqwest = { version = "0.13", default-features = false, features = ["charset", "
 # Default features keep `audio_toolbox` + `core_audio`, both required
 # for AudioUnit construction + property access.
 coreaudio-rs = "0.14"
+# Grand Central Dispatch bindings — used to run AudioUnit initialize/start
+# on the main queue to avoid the VPIO RPC timeout on iOS simulator.
+dispatch2 = "0.3"
+# ndarray is required by ort's tensor construction API.
+ndarray = "0.16"
+
+[target.'cfg(target_os = "ios")'.dependencies]
+# ONNX Runtime Rust binding for Silero VAD v6 (P1 VAD_002). The official
+# iOS CocoaPod ships ONNX Runtime as a static framework, so iOS links it
+# into chanora_bridge at build time instead of loading a dylib at runtime.
+ort = { version = "2.0.0-rc.10", default-features = false, features = ["std", "ndarray"] }
+
+[target.'cfg(target_os = "macos")'.dependencies]
+# macOS keeps dynamic loading so developer machines can provide ORT via
+# ORT_DYLIB_PATH without forcing a bundled runtime into desktop builds.
+ort = { version = "2.0.0-rc.10", default-features = false, features = ["load-dynamic", "ndarray"] }
 
 [target.'cfg(target_os = "android")'.dependencies]
 # Android cross-builds should not pull OpenSSL. Use rustls here while keeping