feat: macos, audio, loopback (#10025)

Signed-off-by: fufesou <linlong1266@gmail.com>

src/ui_interface.rs

@@ -321,6 +321,8 @@ pub fn get_sound_inputs() -> Vec<String> {
         fn get_sound_inputs_() -> Vec<String> {
             let mut out = Vec::new();
             use cpal::traits::{DeviceTrait, HostTrait};
+            // Do not use `cpal::host_from_id(cpal::HostId::ScreenCaptureKit)` for feature = "screencapturekit"
+            // Because we explicitly handle the "System Sound" device.
             let host = cpal::default_host();
             if let Ok(devices) = host.devices() {
                 for device in devices {