island: open the window source's properties from the pill

A Wayland window capture is chosen in the portal picker, which only OBS's
source dialog can open. In a scene whose only source is a PipeWire capture,
the panel gets a Window button that opens that dialog. A window scene with
more than one source needs a per-scene designation the pill does not have yet.

1 files changed, 7 insertions, 5 deletions

diff --git a/desktop/island/README.md b/desktop/island/README.md
index 71455f3..7bd7b10 100644
--- a/desktop/island/README.md
+++ b/desktop/island/README.md
@@ -84,11 +84,13 @@ click opens its panel in the capsule: Record or Stop, Pause or Resume
 (while recording), Webcam (the first `v4l2_input` item in the current
 scene; absent without one), Audio (mute the global "Desktop Audio" input),
 four corner buttons that move the webcam on the canvas, and a scene grid,
-four columns of icon tiles, current one highlighted, click to switch. The
-scene glyphs come from `~/.config/quickshell/obs-scene-icons.json`, watched
-and edited from the settings window's "OBS scenes" page; an unmapped scene
-shows `?`. While recording the sliver pulses red, and holds dim while
-paused.
+four columns of icon tiles, current one highlighted, click to switch. In a
+scene whose only source is a PipeWire capture (the window scene), a Window
+button opens that source's properties, where OBS's portal picker chooses the
+window. The scene glyphs come from
+`~/.config/quickshell/obs-scene-icons.json`, watched and edited from the
+settings window's "OBS scenes" page; an unmapped scene shows `?`. While
+recording the sliver pulses red, and holds dim while paused.
 
 QML's `WebSocket` does not expose the close code, so a wrong password
 reads the same as OBS quitting; it is logged once as "closed before