feat(sound): per-app volume on the drawer page, output to 150%

The island spec put per-app volume on the drawer page, and it was never
built. Each application playing audio now gets a row with its name, what it
is playing (two browser tabs are otherwise identical rows), a click-to-mute
level and its own slider.

Streams are matched on PwNodeType.AudioOutStream. Quickshell reports isSink
true for a playback stream, so the obvious isStream && !isSink filter found
nothing while Firefox played. Their properties are empty until bound, so the
page carries a PwObjectTracker for them, which stops with the drawer.
speech-dispatcher-dummy is always present and never audible, and is hidden.

The output slider runs to 150%, the ceiling the volume keybind already uses
(wpctl -l 1.5), with a tick at 100%. Input and apps stop at 100%: a boosted
microphone only clips. The meter became an inline component shared by both,
and wheel-up never lowers a level already past its maximum.

Now playing is dropped from the page: the OSD already carries it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/desktop/modules/sound/Service.qml b/desktop/modules/sound/Service.qml
index 22a4520..5f10c34 100644
--- a/desktop/modules/sound/Service.qml
+++ b/desktop/modules/sound/Service.qml
@@ -36,6 +36,14 @@ Scope {
         Pipewire.nodes.values.filter(n => n.audio && !n.isStream && !n.isSink
                                           && !String(n.name).endsWith(".monitor"))
 
+    // Applications playing audio. Matched on the node type: `isSink` reads
+    // true for a playback stream (Firefox, measured), the reverse of what it
+    // means for a device, so it cannot tell playback from recording here.
+    readonly property var streams:
+        Pipewire.nodes.values.filter(n => n.type === PwNodeType.AudioOutStream
+                                          // always present, never audible
+                                          && n.name !== "speech-dispatcher-dummy")
+
     // Which node changed last, and whether it was the input. The OSD draws
     // this one; null means nothing to show.
     property PwNode active: null