audio: add default output sink cycle ipc (caelestia-dots#1200)

* [CI] chore: update flake

* [CI] chore: update flake

* [CI] chore: update flake

* [CI] chore: update flake

* audio: added default audio output cycle IPC

* fix format

---------

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: 2 * r + 2 * t <61896496+soramanew@users.noreply.github.com>

Author: 3 people

services/Audio.qml

@@ -2,6 +2,7 @@ pragma Singleton
 
 import QtQuick
 import Quickshell
+import Quickshell.Io
 import Quickshell.Services.Pipewire
 import Caelestia
 import Caelestia.Services
@@ -67,6 +68,15 @@ Singleton {
         Pipewire.preferredDefaultAudioSource = newSource;
     }
 
+    function cycleNextAudioOutput(): void {
+        if (sinks.length === 0)
+            return;
+
+        const currentIndex = sinks.findIndex(s => s === sink);
+        const nextIndex = (currentIndex + 1) % sinks.length;
+        setAudioSink(sinks[nextIndex]);
+    }
+
     function setStreamVolume(stream: PwNode, newVolume: real): void {
         if (stream?.ready && stream?.audio) {
             stream.audio.muted = false;
@@ -162,4 +172,12 @@ Singleton {
     BeatTracker {
         id: beatTracker
     }
+
+    IpcHandler {
+        function cycleOutput(): void {
+            root.cycleNextAudioOutput();
+        }
+
+        target: "audio"
+    }
 }