ui : extract discover pipeline tags, memory and serve-command constants

Move remaining magic strings in the discover UI into $lib/constants:
- HF modalities: HF_MODALITY_PIPELINE_TAGS (vision/audio/video pipeline_tag
  groups) and HF_MMPROJ_FILENAME_TOKEN; reuse MODEL_ID.ORG_SEPARATOR for the
  org split.
- Bit-depth row: OTHER_BIT_DEPTH_LABEL, BIT_DEPTH_LABEL_SUFFIX and the
  existing GIGABYTE_LABEL / OTHER_BIT_DEPTH instead of 'Other', '-bit', 'GB'.
- Serve command preview: a SERVE_COMMAND constants object (llama/serve/-hf/
  -hfd/--spec-type) plus MODEL_ID.QUANTIZATION_SEPARATOR for the ':' join.

Assisted-by: llama-ui:Qwen3.8-Flash-Next

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverDetails/ModelsDiscoverDetailsDownloadOptions/ModelsDiscoverDetailsDownloadOptionsDownloadCommand.svelte

@@ -2,7 +2,13 @@
 	import { quantBitDepth } from './download-options.utils';
 	import { Check, Copy, Plus, X } from '@lucide/svelte';
 	import * as Select from '$lib/components/ui/select';
-	import { DEFAULT_BASE_BIT_DEPTH, type ModelSidecar,SPEC_TYPE } from '$lib/constants';
+	import {
+		DEFAULT_BASE_BIT_DEPTH,
+		MODEL_ID,
+		type ModelSidecar,
+		SERVE_COMMAND,
+		SPEC_TYPE
+	} from '$lib/constants';
 	import { HuggingFaceService } from '$lib/services';
 	import type { QuantOption } from '$lib/types';
 	import { copyToClipboard } from '$lib/utils';
@@ -91,10 +97,20 @@
 
 	/** The llama serve command, composed from the inline picks. */
 	let command = $derived.by(() => {
-		const parts = ['llama', 'serve', '-hf', mainQuant ? `${modelId}:${mainQuant}` : modelId];
+		const parts = [
+			SERVE_COMMAND.BIN,
+			SERVE_COMMAND.SUBCOMMAND,
+			SERVE_COMMAND.MODEL_FLAG,
+			mainQuant ? `${modelId}${MODEL_ID.QUANTIZATION_SEPARATOR}${mainQuant}` : modelId
+		];
 
 		if (draftOption && draftQuant) {
-			parts.push('-hfd', `${modelId}:${draftQuant}`, '--spec-type', specType ?? '');
+			parts.push(
+				SERVE_COMMAND.DRAFT_FLAG,
+				`${modelId}${MODEL_ID.QUANTIZATION_SEPARATOR}${draftQuant}`,
+				SERVE_COMMAND.SPEC_TYPE_FLAG,
+				specType ?? ''
+			);
 		}
 
 		return parts.join(' ');
@@ -124,13 +140,15 @@
 	<div
 		class="flex min-w-0 flex-1 items-center gap-x-2 overflow-x-auto py-0.5 font-mono text-xs whitespace-nowrap text-foreground/90"
 	>
-		<span class="shrink-0">llama</span>
+		<span class="shrink-0">{SERVE_COMMAND.BIN}</span>
 
-		<span class="shrink-0">serve</span>
+		<span class="shrink-0">{SERVE_COMMAND.SUBCOMMAND}</span>
 
-		<span class="shrink-0">-hf</span>
+		<span class="shrink-0">{SERVE_COMMAND.MODEL_FLAG}</span>
 
-		<span class="shrink-0">{modelId}{mainQuant ? ':' : ''}</span>
+		<span class="shrink-0">
+			{modelId}{mainQuant ? MODEL_ID.QUANTIZATION_SEPARATOR : ''}
+		</span>
 
 		<!-- Base quant: always part of the command, the 4-bit file by default. -->
 		{#if baseOption}
@@ -172,9 +190,11 @@
 				 it only appears while hovering the segment, or directly on touch -->
 		{#if draftOption}
 			<span class="group/draft inline-flex shrink-0 items-center gap-x-2">
-				<span>-hfd</span>
+				<span>{SERVE_COMMAND.DRAFT_FLAG}</span>
 
-				<span class="shrink-0">{modelId}{draftQuant ? ':' : ''}</span>
+				<span class="shrink-0">
+					{modelId}{draftQuant ? MODEL_ID.QUANTIZATION_SEPARATOR : ''}
+				</span>
 
 				<Select.Root
 					onValueChange={(v) => v && (draftPick = v)}
@@ -199,7 +219,7 @@
 				</Select.Root>
 
 				{#if draftType}
-					<span>--spec-type</span>
+					<span>{SERVE_COMMAND.SPEC_TYPE_FLAG}</span>
 
 					<!-- the select only earns its chrome when there is a real choice to make -->
 					{#if specTypes.length > 1}

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverDetails/ModelsDiscoverDetailsDownloadOptions/ModelsDiscoverDetailsDownloadOptionsRow.svelte

@@ -1,5 +1,11 @@
 <script lang="ts">
 	import ModelsDiscoverDetailsDownloadOptionsQuantDownloadButton from './ModelsDiscoverDetailsDownloadOptionsQuantDownloadButton.svelte';
+	import {
+		BIT_DEPTH_LABEL_SUFFIX,
+		GIGABYTE_LABEL,
+		OTHER_BIT_DEPTH,
+		OTHER_BIT_DEPTH_LABEL
+	} from '$lib/constants';
 	import { SelectableFileKind } from '$lib/enums';
 	import type { DownloadEntryState, SelectableFile } from '$lib/types';
 	import { minMemoryTierGb } from '$lib/utils';
@@ -22,15 +28,17 @@
 
 <div class="grid grid-cols-[5rem_1fr] items-center gap-3 py-3">
 	<div class="pt-1 text-sm tabular-nums text-muted-foreground">
-		{#if bitDepth === 99}
-			Other
+		{#if bitDepth === OTHER_BIT_DEPTH}
+			{OTHER_BIT_DEPTH_LABEL}
 		{:else}
-			{bitDepth}-bit
+			{bitDepth}{BIT_DEPTH_LABEL_SUFFIX}
 		{/if}
 
 		{#if mainMemGb}
 			<span class="block text-[10px] whitespace-nowrap text-muted-foreground/60">
-				needs at least {mainMemGb}GB{draftMemGb ? ` + ${draftMemGb}GB` : ''}+ memory
+				needs at least {mainMemGb}{GIGABYTE_LABEL}{draftMemGb
+					? ` + ${draftMemGb}${GIGABYTE_LABEL}`
+					: ''}+ memory
 			</span>
 		{/if}
 	</div>

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

@@ -1,7 +1,13 @@
 <script lang="ts">
 	import ModelId from '../../ModelId.svelte';
 	import ModelsDiscoverAvatar from '../ModelsDiscoverAvatar.svelte';
-	import { isAuxSidecar, type ModelSidecar } from '$lib/constants';
+	import {
+		HF_MMPROJ_FILENAME_TOKEN,
+		HF_MODALITY_PIPELINE_TAGS,
+		isAuxSidecar,
+		MODEL_ID,
+		type ModelSidecar
+	} from '$lib/constants';
 	import { HuggingFaceService, ModelsService } from '$lib/services';
 	import { modelsHubStore } from '$lib/stores';
 	import type { ModelsHubSizeRange } from '$lib/stores/models-hub/index.svelte';
@@ -20,7 +26,7 @@
 
 	let { active = false, model, onSelect, showBaseModelAvatar = false }: Props = $props();
 
-	let org = $derived(model.id.split('/')[0] ?? model.id);
+	let org = $derived(model.id.split(MODEL_ID.ORG_SEPARATOR)[0] ?? model.id);
 
 	// Org whose avatar is shown: the base model's org when showBaseModelAvatar
 	// (e.g. the Qwen logo for ggml-org/Qwen3.8-27B-GGUF), else the repo's org.
@@ -74,16 +80,12 @@
 	let modalities = $derived.by<ModelModalities>(() => {
 		const tag = model.pipeline_tag ?? '';
 		const vision =
-			['image-text-to-text', 'image-to-text', 'text-to-image', 'image-to-video'].includes(tag) ||
-			Boolean(model.siblings?.some((s) => s.rfilename.toLowerCase().includes('mmproj')));
-		const audio = [
-			'audio-classification',
-			'audio-to-audio',
-			'automatic-speech-recognition',
-			'text-to-speech',
-			'voice-activity-detection'
-		].includes(tag);
-		const video = ['text-to-video', 'image-to-video', 'video-to-video'].includes(tag);
+			HF_MODALITY_PIPELINE_TAGS.vision.includes(tag) ||
+			Boolean(
+				model.siblings?.some((s) => s.rfilename.toLowerCase().includes(HF_MMPROJ_FILENAME_TOKEN))
+			);
+		const audio = HF_MODALITY_PIPELINE_TAGS.audio.includes(tag);
+		const video = HF_MODALITY_PIPELINE_TAGS.video.includes(tag);
 
 		return { audio, video, vision };
 	});

tools/ui/src/lib/constants/huggingface.constants.ts

@@ -100,6 +100,28 @@ export const HF_SAFETENSORS_TAG = 'safetensors';
 
 // Pipeline tasks (logic use only - matching `pipeline_tag` values against tags)
 
+/**
+ * `pipeline_tag` values grouped by the input/output modality they imply, used
+ * to derive a discover row's modality icons. A tag in more than one group (e.g.
+ * `image-to-video`) lights up each modality it belongs to.
+ */
+export const HF_MODALITY_PIPELINE_TAGS: Readonly<
+	Record<'audio' | 'video' | 'vision', readonly string[]>
+> = {
+	audio: [
+		'audio-classification',
+		'audio-to-audio',
+		'automatic-speech-recognition',
+		'text-to-speech',
+		'voice-activity-detection'
+	],
+	video: ['text-to-video', 'image-to-video', 'video-to-video'],
+	vision: ['image-text-to-text', 'image-to-text', 'text-to-image', 'image-to-video']
+};
+
+/** Filename token marking an mmproj sidecar sibling (unlocks vision / audio). */
+export const HF_MMPROJ_FILENAME_TOKEN = 'mmproj';
+
 export const HF_TASK_TAGS: readonly string[] = [
 	'audio-classification',
 	'audio-to-audio',

tools/ui/src/lib/constants/models-discover-download.constants.ts

@@ -27,6 +27,27 @@ export const SPEC_TYPE: Record<ModelSidecar, string> = {
 /** Bit-depth bucket for files that carry no quant token; rendered as "Other". */
 export const OTHER_BIT_DEPTH = 99;
 
+/** Label for the OTHER_BIT_DEPTH bucket. */
+export const OTHER_BIT_DEPTH_LABEL = 'Other';
+
+/** Suffix appended after a bit-depth number to label a row, e.g. `4-bit`. */
+export const BIT_DEPTH_LABEL_SUFFIX = '-bit';
+
+/**
+ * Fixed tokens of the standalone `llama serve` command preview, so the command
+ * builder and its rendered spans share one source of the CLI spelling.
+ */
+export const SERVE_COMMAND = {
+	BIN: 'llama',
+	/** Draft model repo:tag argument (download sidecar / draft weights). */
+	DRAFT_FLAG: '-hfd',
+	/** Main model repo:tag argument. */
+	MODEL_FLAG: '-hf',
+	/** Speculative-decoding type argument for the draft. */
+	SPEC_TYPE_FLAG: '--spec-type',
+	SUBCOMMAND: 'serve'
+} as const;
+
 /** Bit depth preferred for the command's default base quant. */
 export const DEFAULT_BASE_BIT_DEPTH = 4;