player scrubber

src/lib/components/GlobalPlayer.svelte

@@ -62,6 +62,11 @@
 	let currentTime = $state(0);
 	let duration = $state(0);
 
+	// Seek scrubber value that both mobile + desktop sliders bind to.
+	// We keep it in sync with `currentTime` unless the user is actively dragging.
+	let scrubValue = $state(0);
+	let isScrubbing = $state(false);
+
 	// local UI derived from viewport; not persisted
 	let isMobile = $state(false);
 
@@ -105,7 +110,7 @@
 	// Media Session bindings
 	const media = createMediaSessionBindings({
 		play: () => void audioEl?.play(),
-		pause: () => audioEl?.pause(),
+		pause: () => void audioEl?.pause(),
 		next: () => {
 			next();
 			void syncAndAutoplay();
@@ -124,6 +129,21 @@
 		},
 	});
 
+	function onScrubInput(e: Event) {
+		if (!audioEl) return;
+		const next = Number((e.currentTarget as HTMLInputElement).value);
+		if (!Number.isFinite(next)) return;
+
+		isScrubbing = true;
+		scrubValue = next;
+		audioEl.currentTime = Math.max(0, next);
+	}
+
+	function onScrubCommit() {
+		// Release "user is dragging" mode so timeupdate can drive the UI again.
+		isScrubbing = false;
+	}
+
 	function syncAudioToCurrentTrack() {
 		if (!audioEl) return;
 
@@ -240,6 +260,12 @@
 	function onAudioTimeUpdate() {
 		if (!audioEl) return;
 		currentTime = audioEl.currentTime || 0;
+
+		// Keep the shared scrubber value synced to playback time unless the user is dragging.
+		if (!isScrubbing) {
+			scrubValue = currentTime;
+		}
+
 		media.updatePositionState({
 			duration,
 			position: currentTime,
@@ -249,6 +275,12 @@
 	function onAudioLoadedMetadata() {
 		if (!audioEl) return;
 		duration = Number.isFinite(audioEl.duration) ? audioEl.duration : 0;
+
+		// On metadata load (track change), ensure scrubber aligns with currentTime.
+		if (!isScrubbing) {
+			scrubValue = currentTime;
+		}
+
 		media.updatePositionState({
 			duration,
 			position: currentTime,
@@ -519,6 +551,24 @@
 				<div class="text-xs text-muted-foreground">
 					{formatTime(currentTime)} / {formatTime(duration)}
 				</div>
+
+				<label class="mt-2 block">
+					<span class="sr-only">Seek</span>
+					<input
+						class="w-full"
+						type="range"
+						min="0"
+						max={Math.max(0, duration)}
+						step="0.1"
+						value={Math.min(scrubValue, duration || 0)}
+						disabled={!snap.currentTrack || duration <= 0}
+						oninput={onScrubInput}
+						onchange={onScrubCommit}
+						onpointerup={onScrubCommit}
+						ontouchend={onScrubCommit}
+						onkeyup={onScrubCommit}
+					/>
+				</label>
 			</div>
 
 			<button
@@ -761,6 +811,24 @@
 						</div>
 					</div>
 
+					<label class="block">
+						<span class="sr-only">Seek</span>
+						<input
+							class="w-full"
+							type="range"
+							min="0"
+							max={Math.max(0, duration)}
+							step="0.1"
+							value={Math.min(scrubValue, duration || 0)}
+							disabled={!snap.currentTrack || duration <= 0}
+							oninput={onScrubInput}
+							onchange={onScrubCommit}
+							onpointerup={onScrubCommit}
+							ontouchend={onScrubCommit}
+							onkeyup={onScrubCommit}
+						/>
+					</label>
+
 					<div class="flex items-center gap-2">
 						<button
 							class="inline-flex h-8 w-8 items-center justify-center rounded border"