fix(player): volume slider jumps / flickers

src/lib/components/groove/Footer.svelte

@@ -13,7 +13,6 @@
 	import { Progress } from '$lib/components/ui/progress';
 	import dayjs from 'dayjs';
 	import duration from 'dayjs/plugin/duration';
-	import { Slider } from '$lib/components/ui/slider';
 	import * as Popover from '$lib/components/ui/popover';
 	import { Separator } from '$lib/components/ui/separator';
 	import { getPlayerState } from '$lib/player.svelte';
@@ -77,19 +76,24 @@
 		};
 	};
 
+	const submitVolumeForm: SubmitFunction = async ({ formData }) => {
+		formData.set('volume', player.volume.toString());
+
+		return async ({ update, result }) => {
+			await update({
+				invalidateAll: false
+			});
+
+			if (result.type === 'success' && result.data && 'volume' in result.data) {
+				player.volume = result.data.volume;
+			}
+		};
+	};
+
 	function onMouseMove(e: MouseEvent) {
 		mouse.offsetX = e.offsetX;
 		mouse.offsetY = e.offsetY;
 	}
-
-	let volume = $state({
-		get value() {
-			return [player.volume];
-		},
-		set value(v: number[]) {
-			player.volume = v[0];
-		}
-	});
 </script>
 
 <footer class="border border-x-0 border-t border-border/40 bg-background/95 px-4">
@@ -189,20 +193,23 @@
 					class="flex-1"
 					method="POST"
 					action="/player?/volume"
-					use:enhance
+					use:enhance={submitVolumeForm}
 				>
-					<input type="hidden" name="volume" value={volume.value[0]} />
+					<input
-					<Slider
+						class="volume-slider"
-						class="w-full"
+						type="range"
-						min={0}
+						min={0.0}
-						max={1}
+						max={1.0}
 						step={0.01}
-						bind:value={volume.value}
+						bind:value={player.volume}
-						onValueChange={() => {
+						oninput={() => {
 							volumeForm?.requestSubmit();
 						}}
-						onValueCommit={() => {
+						onmousedown={() => {
-							volumeForm?.requestSubmit();
+							player.adjustingVolume = true;
+						}}
+						onmouseup={() => {
+							player.adjustingVolume = false;
 						}}
 					/>
 				</form>
@@ -240,3 +247,30 @@
 </footer>
 
 <svelte:window onmousemove={onMouseMove} />
+
+<style>
+	.volume-slider {
+		-webkit-appearance: none !important; /* Override default CSS styles */
+		appearance: none !important;
+		width: 100%; /* Full-width */
+		height: 8px; /* Specified height */
+		border-radius: 0.5rem;
+		background: hsl(var(--secondary));
+		outline: none; /* Remove outline */
+		opacity: 0.7; /* Set transparency (for mouse-over effects on hover) */
+		-webkit-transition: 0.2s; /* 0.2 seconds transition on hover */
+		transition: opacity 0.2s;
+	}
+
+	.volume-slider::-webkit-slider-thumb {
+		@apply size-4 bg-background ring ring-secondary ring-offset-0 ring-offset-transparent transition-colors;
+
+		appearance: none;
+		background-color: hsl(var(--primary));
+		border-radius: 100%;
+	}
+
+	.volume-slider::-webkit-slider-thumb:active {
+		@apply ring-offset-2 ring-offset-background;
+	}
+</style>

src/lib/components/groove/SongListing.svelte

@@ -25,6 +25,7 @@
 			if (result.type === 'success' && result.data) {
 				player.currentlyPlaying = result.data.track ?? null;
 				player.progress = result.data.position;
+				player.isPaused = false;
 			}
 		};
 	};

src/lib/player.svelte.ts

@@ -5,10 +5,11 @@ import { PlayerClient } from './proto/player.client';
 import { protoTransport } from '../hooks.client';
 
 class PlayerState {
-	volume = $state(0);
+	volume = $state(0.0);
 	currentlyPlaying = $state<Track | null>(null);
 	progress = $state<bigint>(0n);
 	isPaused = $state(false);
+	adjustingVolume = $state(false);
 	#abortContoller: AbortController | null = null;
 
 	constructor() {
@@ -26,7 +27,10 @@ class PlayerState {
 	}
 
 	applyStatus(status: PlayerStatus) {
-		this.volume = status.volume;
+		if (!this.adjustingVolume) {
+			this.volume = status.volume;
+		}
+
 		this.progress = status.progress;
 		this.currentlyPlaying = status.currentlyPlaying ?? null;
 		this.isPaused = status.isPaused;

src/routes/+layout.server.ts

@@ -1,5 +1,3 @@
-import { PlayerClient } from '$lib/proto/player.client';
-import { protoTransport } from '../hooks.server';
 import type { LayoutServerLoad } from './$types';
 
 export const load: LayoutServerLoad = async () => {