feat: shadcn quant selects with dynamic trigger width in download command

Replaces the native quant selects with the ui/select component using a
new xs trigger size: h-6, mono text, w-fit so the trigger width follows
the selected quant instead of reserving space for the widest option.
The primary-tinted look and the dashed default-preview state carry over
via trigger classes; SELECT_CLASS is no longer needed.

Assisted-by: Claude Sonnet

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverAvatar.svelte

@@ -4,6 +4,7 @@
 	import { HuggingFaceService } from '$lib/services';
 
 	interface Props {
+        class?: string;
 		/** Org whose avatar is shown (may differ from the repo's org for base models). */
 		org: string;
 		/** Repo's own org, shown as a small corner badge when provided. */
@@ -22,6 +23,7 @@
 
 	let {
 		baseImageClass = '',
+	    class: className = '',
 		org,
 		quantImageClass = 'h-full w-full',
 		quantOrg,
@@ -57,7 +59,7 @@
 	});
 </script>
 
-<span class="relative mt-0.5 inline-flex shrink-0">
+<span class="relative mt-0.5 inline-flex shrink-0 {className}">
 	{#if avatarError}
 		<span
 			aria-hidden="true"

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverListItem.svelte

@@ -135,7 +135,7 @@
 		onclick={() => onSelect?.(model.id)}
 		type="button"
 	>
-		<ModelsDiscoverAvatar org={avatarOrg} quantOrg={showBaseModelAvatar ? org : undefined} />
+		<ModelsDiscoverAvatar class="mt-1" org={avatarOrg} quantOrg={showBaseModelAvatar ? org : undefined} />
 
 		<span class="min-w-0 flex-1">
 			<ModelId

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverModelDetailsDownloadOptionsDownloadCommand.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
-	import { type QuantOption, SELECT_CLASS } from './download-options.utils';
+	import { type QuantOption } from './download-options.utils';
 	import { Check, Copy } from '@lucide/svelte';
+	import * as Select from '$lib/components/ui/select';
 	import { type ModelSidecar } from '$lib/constants';
 	import { copyToClipboard } from '$lib/utils';
 
@@ -43,6 +44,14 @@
 
 	let copied = $state(false);
 
+	// Trigger labels: the select trigger has no automatic value rendering.
+	let baseSelectedLabel = $derived(
+		baseOptions.find((option) => option.path === basePick)?.label ?? basePick
+	);
+	let draftSelectedLabel = $derived(
+		draftOptions.find((option) => option.path === draftPick)?.label ?? draftPick
+	);
+
 	async function copy() {
 		await copyToClipboard(command);
 		copied = true;
@@ -67,19 +76,33 @@
 
 		<!-- Base quant: always part of the command, the 8-bit file by default. -->
 		{#if baseOptions.length}
-			<select
-				aria-label="Base model quantization"
-				class="{SELECT_CLASS} {mainSelected ? '' : 'border-dashed'} -ml-2"
-				onchange={(e) => onBasePick(e.currentTarget.value)}
-				title={mainSelected ? undefined : 'Default quant - pick a file above or another quant here'}
-				value={basePick}
-			>
-				{#each baseOptions as option (option.path)}
-					<option disabled={option.disabled} value={option.path}>
-						{option.label}
-					</option>
-				{/each}
-			</select>
+			<Select.Root onValueChange={(v) => v && onBasePick(v)} type="single" value={basePick}>
+				<Select.Trigger
+					aria-label="Base model quantization"
+					class="-ml-2 border-primary/15 bg-primary/[0.07] font-mono text-foreground hover:bg-primary/15 focus-visible:border-primary/40 focus-visible:ring-0 {mainSelected
+						? ''
+						: 'border-dashed'}"
+					size="xs"
+					title={mainSelected
+						? undefined
+						: 'Default quant - pick a file above or another quant here'}
+				>
+					{baseSelectedLabel}
+				</Select.Trigger>
+
+				<Select.Content class="font-mono text-xs">
+					{#each baseOptions as option (option.path)}
+						<Select.Item
+							class="text-xs"
+							disabled={option.disabled}
+							label={option.label}
+							value={option.path}
+						>
+							{option.label}
+						</Select.Item>
+					{/each}
+				</Select.Content>
+			</Select.Root>
 		{/if}
 
 		<!-- Draft segment: appears once a draft is picked, quant inline too. -->
@@ -88,18 +111,28 @@
 
 			<span class="shrink-0">{modelId}{draftQuant ? ':' : ''}</span>
 
-			<select
-				aria-label="Draft model quantization"
-				class="{SELECT_CLASS} -ml-2"
-				onchange={(e) => onDraftPick(e.currentTarget.value)}
-				value={draftPick}
-			>
-				{#each draftOptions as option (option.path)}
-					<option disabled={option.disabled} value={option.path}>
-						{option.label}
-					</option>
-				{/each}
-			</select>
+			<Select.Root onValueChange={(v) => v && onDraftPick(v)} type="single" value={draftPick}>
+				<Select.Trigger
+					aria-label="Draft model quantization"
+					class="-ml-2 border-primary/15 bg-primary/[0.07] font-mono text-foreground hover:bg-primary/15 focus-visible:border-primary/40 focus-visible:ring-0"
+					size="xs"
+				>
+					{draftSelectedLabel}
+				</Select.Trigger>
+
+				<Select.Content class="font-mono text-xs">
+					{#each draftOptions as option (option.path)}
+						<Select.Item
+							class="text-xs"
+							disabled={option.disabled}
+							label={option.label}
+							value={option.path}
+						>
+							{option.label}
+						</Select.Item>
+					{/each}
+				</Select.Content>
+			</Select.Root>
 
 			<span>--spec-type</span>
 

tools/ui/src/lib/components/app/models/discover/download-options.utils.ts

@@ -43,9 +43,3 @@ export function labelFor(path: string): string {
 
 	return basename.replace(/\.gguf$/i, '');
 }
-
-// min-w keeps the value clear of the native chevron: Safari sizes a select
-// to its widest option, so an exactly-as-wide value would otherwise let the
-// chevron overlap the text (draft selects are all same-width quants).
-export const SELECT_CLASS =
-	'h-6 min-w-22 max-w-36 shrink-0 cursor-pointer rounded border border-primary/15 bg-primary/[0.07] py-0 pr-3 pl-2 font-mono text-xs text-foreground outline-none transition-colors hover:bg-primary/15 focus-visible:border-primary/40 focus-visible:ring-0';

tools/ui/src/lib/components/ui/select/select-trigger.svelte

@@ -11,18 +11,24 @@
 		variant = 'default',
 		...restProps
 	}: WithoutChild<SelectPrimitive.TriggerProps> & {
-		size?: 'sm' | 'default';
+		size?: 'xs' | 'sm' | 'default';
 		variant?: 'default' | 'plain';
 	} = $props();
 
+	// Super small trigger: fits its selected value, for dense inline use.
+	const xsClasses =
+		"flex h-6 w-fit items-center justify-between gap-1 rounded-md border border-input bg-transparent px-2 py-0 text-xs whitespace-nowrap outline-none select-none transition-colors focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 data-[placeholder]:text-muted-foreground dark:bg-input/30 dark:hover:bg-input/50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='text-'])]:text-muted-foreground";
+
 	const baseClasses = $derived(
 		variant === 'plain'
 			? "group inline-flex w-full items-center justify-end gap-2 whitespace-nowrap px-0 py-0 text-sm font-medium text-muted-foreground transition-colors focus-visible:outline-none focus-visible:ring-0 focus-visible:ring-offset-0 disabled:cursor-not-allowed disabled:opacity-50 data-[placeholder]:text-muted-foreground data-[size=default]:h-9 data-[size=sm]:h-8 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-3 [&_svg:not([class*='text-'])]:text-muted-foreground"
-			: "flex w-fit items-center justify-between gap-2 rounded-md border border-input bg-transparent px-3 py-2 text-sm whitespace-nowrap shadow-xs transition-[color,box-shadow] outline-none select-none focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-destructive/20 data-[placeholder]:text-muted-foreground data-[size=default]:h-9 data-[size=sm]:h-8 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-2 dark:bg-input/30 dark:hover:bg-input/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 [&_svg:not([class*='text-'])]:text-muted-foreground"
+			: size === 'xs'
+				? xsClasses
+				: "flex w-fit items-center justify-between gap-2 rounded-md border border-input bg-transparent px-3 py-2 text-sm whitespace-nowrap shadow-xs transition-[color,box-shadow] outline-none select-none focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-destructive/20 data-[placeholder]:text-muted-foreground data-[size=default]:h-9 data-[size=sm]:h-8 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-2 dark:bg-input/30 dark:hover:bg-input/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 [&_svg:not([class*='text-'])]:text-muted-foreground"
 	);
 
 	const chevronClasses = $derived(
-		variant === 'plain'
+		variant === 'plain' || size === 'xs'
 			? 'size-3 opacity-60 transition-transform group-data-[state=open]:-rotate-180'
 			: 'size-4 opacity-50'
 	);