feat(lyrics): add seek-to-line on clicking lyrics line (#3823)

quickshell/Modules/DDash/Media/LyricsOverlay.qml

@@ -340,6 +340,18 @@ FocusScope {
                         }
                     }
                 }
+
+                StateLayer {
+                    anchors.fill: parent
+                    enabled: root.controller.canSeekLines
+                    stateColor: Theme.onSurfaceVariant
+                    cornerRadius: Theme.cornerRadius
+                    onClicked: {
+                        root.following = true;
+                        root.forceActiveFocus(Qt.MouseFocusReason);
+                        root.controller.seekToLine(lyric.index);
+                    }
+                }
             }
         }
 

quickshell/Modules/DDash/Media/LyricsVocal.qml

@@ -90,6 +90,7 @@ Item {
     }
 
     Item {
+        y: (root.implicitHeight - height) / 2
         width: parent.width
         height: Math.ceil(line.implicitHeight * root.textScale)
 

quickshell/Services/LyricsController.qml

@@ -20,6 +20,7 @@ QtObject {
     property bool enabled: false
 
     readonly property bool available: DMSService.capabilities.includes("lyrics")
+    readonly property bool canSeekLines: synced && (player?.canSeek ?? false) && duration > 0
     readonly property string fileUrl: url.startsWith("file://") ? url : ""
     readonly property string trackKey: track ? JSON.stringify([track.key, track.title, track.artist, track.album, fileUrl, MediaOptions.enabledLyricsProviders]) : ""
     readonly property int duration: Math.round(track?.length ?? 0)
@@ -371,6 +372,16 @@ QtObject {
         state = "ready";
     }
 
+    function seekToLine(index) {
+        if (!synced || duration <= 0 || !player?.canSeek)
+            return false;
+        const line = lines[index];
+        if (!line || !Number.isFinite(line.t))
+            return false;
+        player.position = Math.max(0.1, Math.min(line.t, duration * 0.99));
+        return true;
+    }
+
     function currentTime() {
         if (!anchorPlaying)
             return anchorPosition;