ui : show in-progress downloads in the model selector

A "Download in progress" section above the loaded models lists the
in-flight and paused downloads with a live progress bar and the same
pause, resume and cancel actions as the discover quant chips, with the
same avatar and model id presentation as the regular option rows.

Assisted-by: pi

tools/ui/src/lib/components/app/models/ModelsSelectorDownloadItem.svelte

@@ -0,0 +1,117 @@
+<script lang="ts">
+	import DownloadProgressBar from './discover/DownloadProgressBar.svelte';
+	import ModelsDiscoverAvatar from './discover/ModelsDiscoverAvatar.svelte';
+	import { Loader2, Pause, Play, X } from '@lucide/svelte';
+	import { ModelId } from '$lib/components/app';
+	import { HuggingFaceService, ModelsService } from '$lib/services';
+	import { modelsStore } from '$lib/stores';
+	import type { ModelDownloadProgress } from '$lib/types';
+
+	interface Props {
+		/** One entry from the status feed: an in-flight or paused download. */
+		entry: { isPaused: boolean; progress: ModelDownloadProgress | null; repoWithTag: string };
+	}
+
+	let { entry }: Props = $props();
+
+	let percent = $derived(
+		entry.progress && entry.progress.totalBytes > 0
+			? Math.round((entry.progress.downloadedBytes / entry.progress.totalBytes) * 100)
+			: null
+	);
+
+	let actionText = $derived(entry.isPaused ? 'Resume downloading' : 'Pause downloading');
+
+	// Avatar: the repo org with the quantizer org corner badge, as in the model
+	// option rows; the base model org resolves lazily via HF when unknown
+	let orgName = $derived(ModelsService.parseModelId(entry.repoWithTag).orgName);
+	let fetchedBaseModelOrg = $state<string | null>(null);
+
+	$effect(() => {
+		const repoWithTag = entry.repoWithTag;
+
+		fetchedBaseModelOrg = null;
+
+		let cancelled = false;
+
+		void HuggingFaceService.getBaseModel(repoWithTag).then((base) => {
+			if (!cancelled && base?.org) fetchedBaseModelOrg = base.org;
+		});
+
+		return () => {
+			cancelled = true;
+		};
+	});
+</script>
+
+<!-- One in-flight download; same actions as the discover quant chips: the row
+     itself pauses / resumes, the trailing X cancels (stops and discards the
+     partial files). Both affordances fade in on hover, the slots are reserved
+     so the list never reflows. -->
+<div
+	class="group relative flex items-center gap-2 rounded-sm p-2 text-left text-sm transition-colors hover:bg-accent/50"
+>
+	<button
+		aria-label={actionText}
+		class="flex min-w-0 flex-1 cursor-pointer items-center gap-2 text-left"
+		onclick={() => {
+			if (entry.isPaused) void modelsStore.status.downloadModel(entry.repoWithTag).catch(() => {});
+			else void modelsStore.status.pauseDownload(entry.repoWithTag);
+		}}
+		type="button"
+	>
+		{#if orgName}
+			<ModelsDiscoverAvatar
+				class="mt-0"
+				org={fetchedBaseModelOrg ?? orgName}
+				quantOrg={orgName}
+				quantPositionClass="-bottom-1 -right-1"
+				quantSize="h-3 w-3"
+				size="h-6 w-6"
+			/>
+		{/if}
+
+		<ModelId class="flex-1" hideOrgName modelId={entry.repoWithTag} showRawTooltip />
+
+		{#if percent !== null}
+			<span class="shrink-0 font-mono text-xs tabular-nums text-muted-foreground">{percent}%</span>
+		{:else if entry.isPaused}
+			<span class="shrink-0 text-xs text-muted-foreground">Paused</span>
+		{/if}
+
+		<!-- status action: spinner -> pause on hover while in flight, play on hover
+				 when paused; opacity only for the spinner, the spin owns the transform -->
+		<span class="relative inline-flex h-4 w-4 shrink-0 items-center justify-center">
+			{#if entry.isPaused}
+				<Play
+					class="absolute h-4 w-4 scale-75 opacity-0 transition-[opacity,transform] duration-150 ease-[cubic-bezier(0.23,1,0.32,1)] group-hover:scale-100 group-hover:opacity-100 [@media(pointer:coarse)]:scale-100 [@media(pointer:coarse)]:opacity-100"
+				/>
+			{:else}
+				<Loader2
+					class="absolute h-4 w-4 animate-spin text-muted-foreground transition-opacity duration-150 ease-[cubic-bezier(0.23,1,0.32,1)] group-hover:opacity-0 [@media(pointer:coarse)]:hidden"
+				/>
+
+				<Pause
+					class="absolute h-4 w-4 opacity-0 transition-opacity duration-150 ease-[cubic-bezier(0.23,1,0.32,1)] group-hover:opacity-100 [@media(pointer:coarse)]:opacity-100"
+				/>
+			{/if}
+		</span>
+	</button>
+
+	<button
+		aria-label="Cancel downloading"
+		class="inline-flex h-4 w-4 shrink-0 scale-75 cursor-pointer items-center justify-center rounded-sm text-muted-foreground/70 opacity-0 transition-[opacity,transform,color] duration-150 ease-[cubic-bezier(0.23,1,0.32,1)] hover:text-destructive group-hover:scale-100 group-hover:opacity-100 [@media(pointer:coarse)]:scale-100 [@media(pointer:coarse)]:opacity-100"
+		onclick={() => void modelsStore.status.cancelDownload(entry.repoWithTag)}
+		type="button"
+	>
+		<X class="h-4 w-4" />
+	</button>
+
+	{#if entry.progress && entry.progress.totalBytes > 0}
+		<DownloadProgressBar
+			downloadedBytes={entry.progress.downloadedBytes}
+			overlay
+			totalBytes={entry.progress.totalBytes}
+		/>
+	{/if}
+</div>

tools/ui/src/lib/components/app/models/ModelsSelectorList.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+	import ModelsSelectorDownloadItem from './ModelsSelectorDownloadItem.svelte';
 	import { ModelsSelectorOption } from '$lib/components/app';
 	import type { GroupedModelOptions, ModelItem } from '$lib/components/app/navigation/utils';
 	import { modelsStore } from '$lib/stores';
@@ -23,6 +24,9 @@
 		sectionHeaderClass = 'm-0 px-2 py-2 text-[13px] font-semibold text-muted-foreground/70 select-none'
 	}: Props = $props();
 	let render = $derived(renderOption ?? defaultOption);
+
+	/** In-flight / paused downloads, tracked by the status feed. */
+	let downloadEntries = $derived(modelsStore.status.downloadEntries());
 </script>
 
 {#snippet defaultOption(item: ModelItem, _hideOrgName: boolean)}
@@ -44,8 +48,16 @@
 	/>
 {/snippet}
 
+{#if downloadEntries.length > 0}
+	<p class="{sectionHeaderClass} mt-0">Download in progress</p>
+
+	{#each downloadEntries as entry (entry.repoWithTag)}
+		<ModelsSelectorDownloadItem {entry} />
+	{/each}
+{/if}
+
 {#if groups.loaded.length > 0}
-	<p class="{sectionHeaderClass} mt-0">Loaded models</p>
+	<p class={sectionHeaderClass}>Loaded models</p>
 
 	{#each groups.loaded as item (`loaded-${item.option.id}`)}
 		{@render render(item, false)}

tools/ui/src/lib/components/app/models/index.ts

@@ -56,6 +56,15 @@ export { default as ModelsSelectorDropdown } from './ModelsSelectorDropdown.svel
  */
 export { default as ModelsSelectorList } from './ModelsSelectorList.svelte';
 
+/**
+ * **ModelsSelectorDownloadItem** - Single in-flight download row
+ *
+ * One "Download in progress" row for the models selector: live progress bar,
+ * pause / resume on click and a hover-revealed cancel, mirroring the discover
+ * quant chips.
+ */
+export { default as ModelsSelectorDownloadItem } from './ModelsSelectorDownloadItem.svelte';
+
 /**
  * **ModelsSelectorOption** - Single model option row
  *