feat(web-player): filter the explore results with a chip group

Under the search box there are now three checkbox chips choosing what the page
shows. Songs keep the existing grid and Albums searches the albums by title;
Users is rendered disabled until there is something behind it.

web-player/src/lib/components/ui/ChipGroup.svelte

@@ -0,0 +1,57 @@
+<script lang="ts" module>
+	import type { LucideIcon } from '@lucide/svelte';
+
+	export interface ChipOption {
+		value: string;
+		label: string;
+		icon?: LucideIcon;
+		disabled?: boolean;
+		hint?: string;
+	}
+</script>
+
+<script lang="ts">
+	import Check from '@lucide/svelte/icons/check';
+
+	interface Props {
+		options: ChipOption[];
+		selected: string[];
+		label: string;
+		onChange: (selected: string[]) => void;
+		class?: string;
+	}
+
+	let { options, selected, label, onChange, class: klass = '' }: Props = $props();
+
+	function toggle(value: string) {
+		onChange(selected.includes(value) ? selected.filter((v) => v !== value) : [...selected, value]);
+	}
+</script>
+
+<div role="group" aria-label={label} class="flex flex-wrap items-center gap-2 {klass}">
+	{#each options as option (option.value)}
+		{@const active = selected.includes(option.value)}
+		<label
+			title={option.hint}
+			class="inline-flex cursor-pointer items-center gap-1.5 rounded-full border px-3.5 py-1.5 text-sm font-semibold transition select-none
+				{active
+				? 'border-transparent bg-accent text-on-accent'
+				: 'border-line bg-surface text-fg-2 hover:bg-surface-hover'}
+				{option.disabled ? 'pointer-events-none opacity-45' : ''}"
+		>
+			<input
+				type="checkbox"
+				class="sr-only"
+				checked={active}
+				disabled={option.disabled}
+				onchange={() => toggle(option.value)}
+			/>
+			{#if active}
+				<Check class="h-3.5 w-3.5" strokeWidth={3} />
+			{:else if option.icon}
+				<option.icon class="h-3.5 w-3.5" strokeWidth={2} />
+			{/if}
+			{option.label}
+		</label>
+	{/each}
+</div>

web-player/src/lib/config.ts

@@ -6,5 +6,6 @@ export const ALBUMS_PAGE_SIZE = 50;
 export const ALBUM_TRACKS_PAGE_SIZE = 200;
 export const ALBUM_EARLIEST_YEAR = 1877;
 export const LIBRARY_PICKER_PAGE_SIZE = 50;
+export const EXPLORE_ALBUMS_PAGE_SIZE = 18;
 export const HOME_LATEST_PAGE_SIZE = 12;
 export const YOUTUBE_FILLER_LIMIT = 27;