ui : add the manage providers view

A provider is added from a preset card or by hand: the dialog probes the endpoint, reads a refusal as a llama.cpp server that wants a key, and shows the connection test as a status block. Presets carry their official artwork and a saved backend keeps its branding through the favicon fallback. The manager dialog gains its third view, and the settings save stops clobbering keys that other surfaces write. Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
2026-10-02 19:07:25 -05:00 · 2026-10-02 11:59:25 +02:00
parent 742fe79906
commit cc229b4b6d
30 changed files with 1228 additions and 9 deletions
@@ -0,0 +1,163 @@
+<script lang="ts">
+	import BackendIcon from './BackendIcon.svelte';
+	import { Pencil, RotateCw, Server, Trash2 } from '@lucide/svelte';
+	import { DialogConfirmation } from '$lib/components/app/dialogs';
+	import Logo from '$lib/components/app/misc/Logo.svelte';
+	import { Button } from '$lib/components/ui/button';
+	import * as Card from '$lib/components/ui/card';
+	import { Switch } from '$lib/components/ui/switch';
+	import * as Tooltip from '$lib/components/ui/tooltip';
+	import { backendsModelsStore } from '$lib/stores/backendsModels.svelte';
+	import type { Backend, BackendProtocol } from '$lib/types';
+
+	const PROTOCOL_LABELS: Record<BackendProtocol, string> = {
+		'llama.cpp': 'Llama-compatible',
+		openai: 'OpenAI-compatible'
+	};
+
+	const CARD_ICON_CLASS = 'h-5 w-5';
+
+	interface Props {
+		backend: Backend;
+		isLocal?: boolean;
+		onDelete?: () => void;
+		onEdit?: () => void;
+		onToggle?: (enabled: boolean) => void;
+	}
+
+	let { backend, isLocal = false, onDelete, onEdit, onToggle }: Props = $props();
+
+	let showDelete = $state(false);
+	let protocolLabel = $derived(PROTOCOL_LABELS[backend.protocol]);
+	let displayUrl = $derived(backend.baseUrl || 'This server');
+
+	// the model listing doubles as the reachability probe
+	let modelsState = $derived(backendsModelsStore.get(backend.id));
+	let isChecking = $derived(backend.enabled && !modelsState.loaded && !modelsState.error);
+	let isOnline = $derived(backend.enabled && modelsState.loaded && !modelsState.error);
+	let isOffline = $derived(backend.enabled && !!modelsState.error);
+	let hasStatus = $derived(isChecking || isOnline || isOffline);
+	let modelCount = $derived(modelsState.models.length);
+	let metaText = $derived(isLocal ? `Built-in · ${protocolLabel}` : protocolLabel);
+
+	// kick off the probe for backends the prefetch has not covered yet
+	$effect(() => {
+		if (isChecking && !modelsState.loading) {
+			void backendsModelsStore.ensureLoaded(backend.id);
+		}
+	});
+
+	function handleRetry() {
+		backendsModelsStore.clear(backend.id);
+		void backendsModelsStore.ensureLoaded(backend.id);
+	}
+</script>
+
+<Card.Root class="!gap-3 bg-muted/30 p-4">
+	<div class="flex items-start justify-between gap-3">
+		<div class="flex min-w-0 items-center gap-2">
+			<BackendIcon {backend} class={CARD_ICON_CLASS}>
+				{#snippet fallback()}
+					{#if isLocal}
+						<Logo class={CARD_ICON_CLASS} style="--size: 1.25rem" />
+					{:else}
+						<Server class={CARD_ICON_CLASS} />
+					{/if}
+				{/snippet}
+			</BackendIcon>
+
+			<div class="min-w-0">
+				<p class="truncate leading-5 font-medium">{backend.name}</p>
+
+				<p class="truncate text-xs text-muted-foreground">{displayUrl}</p>
+			</div>
+		</div>
+
+		<Switch
+			aria-label={backend.enabled ? 'Disable backend' : 'Enable backend'}
+			checked={backend.enabled}
+			onCheckedChange={(value) => onToggle?.(value)}
+		/>
+	</div>
+
+	{#if isOffline && modelsState.error}
+		<Tooltip.Root>
+			<Tooltip.Trigger>
+				<p class="max-w-full truncate text-left text-xs text-destructive">{modelsState.error}</p>
+			</Tooltip.Trigger>
+
+			<Tooltip.Content>
+				<p class="max-w-80 break-words">{modelsState.error}</p>
+			</Tooltip.Content>
+		</Tooltip.Root>
+	{/if}
+
+	<div class="mt-auto flex items-center justify-between gap-4">
+		<div class="flex min-w-0 items-center gap-1.5 text-xs text-muted-foreground">
+			{#if isChecking}
+				<span class="size-1.5 shrink-0 animate-pulse rounded-full bg-amber-500"></span>
+
+				<span class="shrink-0">Checking</span>
+			{:else if isOnline}
+				<span class="size-1.5 shrink-0 rounded-full bg-emerald-500"></span>
+
+				<span class="shrink-0">{modelCount === 1 ? '1 model' : `${modelCount} models`}</span>
+			{:else if isOffline}
+				<span class="size-1.5 shrink-0 rounded-full bg-destructive"></span>
+
+				<span class="shrink-0">Unreachable</span>
+
+				<button
+					aria-label="Retry connection"
+					class="shrink-0 rounded-sm p-0.5 transition-colors duration-150 ease-out hover:bg-muted hover:text-foreground"
+					onclick={handleRetry}
+				>
+					<RotateCw class="h-3 w-3" />
+				</button>
+			{/if}
+
+			{#if hasStatus}
+				<span class="shrink-0 opacity-50">·</span>
+			{/if}
+
+			<span class="truncate">{metaText}</span>
+		</div>
+
+		{#if !isLocal}
+			<div class="flex shrink-0 items-center gap-1">
+				<Button
+					aria-label="Edit backend"
+					class="relative h-7 w-7 after:absolute after:-inset-0.5 after:content-['']"
+					onclick={() => onEdit?.()}
+					size="icon"
+					variant="ghost"
+				>
+					<Pencil />
+				</Button>
+
+				<Button
+					aria-label="Delete backend"
+					class="hover:text-destructive-foreground relative h-7 w-7 text-destructive after:absolute after:-inset-0.5 after:content-[''] hover:bg-destructive/10"
+					onclick={() => (showDelete = true)}
+					size="icon"
+					variant="ghost"
+				>
+					<Trash2 />
+				</Button>
+			</div>
+		{/if}
+	</div>
+</Card.Root>
+
+<DialogConfirmation
+	bind:open={showDelete}
+	confirmText="Delete"
+	description="This removes the backend and its stored API key."
+	onCancel={() => (showDelete = false)}
+	onConfirm={() => {
+		showDelete = false;
+		onDelete?.();
+	}}
+	title="Delete backend?"
+	variant="destructive"
+/>
@@ -0,0 +1,190 @@
+<script lang="ts">
+	import { ChevronDown, ChevronRight } from '@lucide/svelte';
+	import * as Collapsible from '$lib/components/ui/collapsible';
+	import { Input } from '$lib/components/ui/input';
+	import * as Select from '$lib/components/ui/select';
+	import { DEFAULT_BACKEND_CHAT_PATH, DEFAULT_BACKEND_MODELS_PATH } from '$lib/constants';
+	import type { Backend, BackendProtocol } from '$lib/types';
+
+	const PROTOCOL_OPTIONS: Array<{ label: string; value: BackendProtocol }> = [
+		{ label: 'OpenAI-compatible', value: 'openai' },
+		{ label: 'Llama-compatible (llama-server)', value: 'llama.cpp' }
+	];
+
+	interface Props {
+		backend: Backend;
+		/** The endpoint refused the probe for want of a key. */
+		apiKeyRequired?: boolean;
+		/** Protocol the endpoint reported, once it has been probed. */
+		detected?: BackendProtocol | null;
+		detecting?: boolean;
+		id: string;
+		onChange: (patch: Partial<Backend>) => void;
+		urlError?: string | null;
+	}
+
+	let {
+		apiKeyRequired = false,
+		backend,
+		detected = null,
+		detecting = false,
+		id,
+		onChange,
+		urlError = null
+	}: Props = $props();
+
+	let showAdvanced = $state(false);
+
+	let protocolLabel = $derived(
+		PROTOCOL_OPTIONS.find((option) => option.value === backend.protocol)?.label ?? ''
+	);
+	let detectionLabel = $derived.by(() => {
+		if (detecting) return 'Checking what the endpoint speaks...';
+
+		if (detected === 'llama.cpp') {
+			return apiKeyRequired
+				? 'llama.cpp server detected. It asks for an API key.'
+				: 'llama.cpp server detected.';
+		}
+
+		if (detected === 'openai') return 'OpenAI-compatible endpoint detected.';
+
+		return null;
+	});
+</script>
+
+<div class="grid gap-5">
+	<div>
+		<label class="mb-2 block text-xs font-medium select-none" for="backend-url-{id}">
+			Base URL <span class="text-destructive">*</span>
+		</label>
+
+		<Input
+			class={urlError ? 'border-destructive' : ''}
+			id="backend-url-{id}"
+			oninput={(e) => onChange({ baseUrl: e.currentTarget.value })}
+			placeholder="https://api.example.com"
+			type="url"
+			value={backend.baseUrl}
+		/>
+
+		{#if urlError}
+			<p class="mt-1.5 text-xs text-destructive">{urlError}</p>
+		{:else if detectionLabel}
+			<p class="mt-1.5 text-xs text-muted-foreground">{detectionLabel}</p>
+		{/if}
+	</div>
+
+	<div class="grid gap-5 sm:grid-cols-2">
+		<div>
+			<label class="mb-2 block text-xs font-medium select-none" for="backend-name-{id}">
+				Display name
+			</label>
+
+			<Input
+				id="backend-name-{id}"
+				oninput={(e) => onChange({ name: e.currentTarget.value })}
+				placeholder="Name shown in the model selector"
+				type="text"
+				value={backend.name}
+			/>
+		</div>
+
+		<div>
+			<label class="mb-2 block text-xs font-medium select-none" for="backend-key-{id}">
+				API key{#if apiKeyRequired}<span class="text-destructive"> *</span>{/if}
+			</label>
+
+			<Input
+				autocomplete="off"
+				id="backend-key-{id}"
+				oninput={(e) => onChange({ apiKey: e.currentTarget.value || undefined })}
+				placeholder="Optional"
+				type="password"
+				value={backend.apiKey ?? ''}
+			/>
+
+			<p class="mt-1.5 text-xs text-muted-foreground">
+				{#if apiKeyRequired}
+					Required by this endpoint.
+				{:else}
+					Sent as a Bearer token.
+				{/if}
+			</p>
+		</div>
+	</div>
+
+	<Collapsible.Root bind:open={showAdvanced}>
+		<Collapsible.Trigger
+			class="flex items-center gap-1 text-xs font-medium text-muted-foreground select-none hover:text-foreground"
+		>
+			{#if showAdvanced}
+				<ChevronDown class="h-3.5 w-3.5" />
+			{:else}
+				<ChevronRight class="h-3.5 w-3.5" />
+			{/if}
+
+			Advanced
+		</Collapsible.Trigger>
+
+		<Collapsible.Content>
+			<div class="mt-4 grid gap-5">
+				<div>
+					<span class="mb-2 block text-xs font-medium select-none">API format</span>
+
+					<Select.Root
+						onValueChange={(value) =>
+							onChange({ compat: undefined, protocol: value as BackendProtocol })}
+						type="single"
+						value={backend.protocol}
+					>
+						<Select.Trigger class="w-full">{protocolLabel}</Select.Trigger>
+
+						<Select.Content>
+							{#each PROTOCOL_OPTIONS as option (option.value)}
+								<Select.Item label={option.label} value={option.value}>{option.label}</Select.Item>
+							{/each}
+						</Select.Content>
+					</Select.Root>
+
+					<p class="mt-1.5 text-xs text-muted-foreground">
+						Detected from the endpoint. Override it when a server answers unusually.
+					</p>
+				</div>
+
+				<div class="grid gap-5 sm:grid-cols-2">
+					<div>
+						<label class="mb-2 block text-xs font-medium select-none" for="backend-chat-path-{id}">
+							Chat completions path
+						</label>
+
+						<Input
+							id="backend-chat-path-{id}"
+							oninput={(e) => onChange({ chatPath: e.currentTarget.value || undefined })}
+							placeholder={DEFAULT_BACKEND_CHAT_PATH}
+							type="text"
+							value={backend.chatPath ?? ''}
+						/>
+					</div>
+
+					<div>
+						<label
+							class="mb-2 block text-xs font-medium select-none"
+							for="backend-models-path-{id}"
+						>
+							Models path
+						</label>
+
+						<Input
+							id="backend-models-path-{id}"
+							oninput={(e) => onChange({ modelsPath: e.currentTarget.value || undefined })}
+							placeholder={DEFAULT_BACKEND_MODELS_PATH}
+							type="text"
+							value={backend.modelsPath ?? ''}
+						/>
+					</div>
+				</div>
+			</div>
+		</Collapsible.Content>
+	</Collapsible.Root>
+</div>
@@ -0,0 +1,37 @@
+<script lang="ts">
+	import BackendPresetIcon from './BackendPresetIcon.svelte';
+	import type { Backend } from '$lib/types';
+	import { backendFaviconUrl, findBackendPreset } from '$lib/utils';
+	import type { Snippet } from 'svelte';
+	import { SvelteSet } from 'svelte/reactivity';
+
+	/** Favicons that failed to load, so a row remount does not ask again. */
+	const failedFavicons = new SvelteSet<string>();
+
+	interface Props {
+		backend?: Backend;
+		class?: string;
+		/** Rendered when the backend has neither a bundled mark nor a favicon. */
+		fallback?: Snippet;
+	}
+
+	let { backend, class: className = 'size-4', fallback }: Props = $props();
+
+	let preset = $derived(backend ? findBackendPreset(backend.baseUrl) : undefined);
+	let faviconUrl = $derived(preset || !backend ? null : backendFaviconUrl(backend.baseUrl));
+</script>
+
+{#if preset}
+	<BackendPresetIcon class={className} {preset} />
+{:else if faviconUrl && !failedFavicons.has(faviconUrl)}
+	<img
+		alt=""
+		class={['shrink-0 rounded-sm object-contain', className]}
+		decoding="async"
+		loading="lazy"
+		onerror={() => failedFavicons.add(faviconUrl)}
+		src={faviconUrl}
+	/>
+{:else}
+	{@render fallback?.()}
+{/if}
@@ -0,0 +1,41 @@
+<script lang="ts">
+	import BackendPresetIcon from './BackendPresetIcon.svelte';
+	import { Check } from '@lucide/svelte';
+	import { Badge } from '$lib/components/ui/badge';
+	import * as Card from '$lib/components/ui/card';
+	import type { BackendPreset } from '$lib/types';
+
+	interface Props {
+		preset: BackendPreset;
+		onClick?: () => void;
+		selected?: boolean;
+		dimmed?: boolean;
+		/** A backend already points at this provider. */
+		added?: boolean;
+	}
+
+	let { added = false, dimmed = false, onClick, preset, selected = false }: Props = $props();
+
+	// an added provider is a label, not an action: no hover, no selection
+	let interactive = $derived(!added && Boolean(onClick));
+</script>
+
+<Card.Root
+	class={`relative gap-3! select-none bg-muted/30 p-4 transition-[background-color,opacity,transform] duration-150 ${interactive ? 'cursor-pointer hover:bg-muted/50 hover:opacity-100 active:scale-[0.98]' : ''} ${selected && !added ? 'bg-muted/30 ring-1 ring-primary/40' : ''} ${dimmed || added ? 'opacity-50' : ''}`}
+	onclick={interactive ? onClick : undefined}
+>
+	{#if added}
+		<Badge class="absolute top-2 right-2 gap-1 px-1.5 text-[10px]" variant="secondary">
+			<Check class="h-3 w-3" />
+			Added
+		</Badge>
+	{/if}
+
+	<div class="flex min-w-0 items-center gap-2">
+		<BackendPresetIcon class="h-5 w-5" {preset} />
+
+		<h4 class="min-w-0 flex-1 truncate font-medium">{preset.name}</h4>
+	</div>
+
+	<p class="text-xs text-muted-foreground">{preset.description}</p>
+</Card.Root>
@@ -0,0 +1,34 @@
+<script lang="ts">
+	import { Plug } from '@lucide/svelte';
+	import type { BackendPreset } from '$lib/types';
+	import { mode } from 'mode-watcher';
+
+	interface Props {
+		class?: string;
+		preset?: BackendPreset;
+	}
+
+	let { class: className = 'h-4 w-4', preset }: Props = $props();
+
+	let iconUrl = $derived.by(() => {
+		if (!preset) return null;
+
+		return (
+			(mode.current === 'dark'
+				? (preset.iconUrlDark ?? preset.iconUrl)
+				: (preset.iconUrlLight ?? preset.iconUrl)) ?? null
+		);
+	});
+</script>
+
+{#if iconUrl}
+	<img
+		alt=""
+		class={['shrink-0 rounded-sm object-contain', className]}
+		decoding="async"
+		loading="lazy"
+		src={iconUrl}
+	/>
+{:else}
+	<Plug class={className} />
+{/if}
@@ -0,0 +1,356 @@
+<script lang="ts">
+	import BackendForm from './BackendForm.svelte';
+	import BackendPresetCard from './BackendPresetCard.svelte';
+	import { CheckCircle2, Loader2, PlugZap, XCircle } from '@lucide/svelte';
+	import { browser } from '$app/environment';
+	import { Button } from '$lib/components/ui/button';
+	import * as Dialog from '$lib/components/ui/dialog';
+	import {
+		BACKEND_ID_PREFIX,
+		BACKEND_PRESETS,
+		DISMISSED_RECOMMENDED_BACKENDS_LOCALSTORAGE_KEY
+	} from '$lib/constants';
+	import { BooleanString } from '$lib/enums';
+	import { BackendsService } from '$lib/services';
+	import type { BackendTestResult } from '$lib/services/backends.service';
+	import { backendsStore } from '$lib/stores';
+	import type { Backend, BackendPreset, BackendProtocol } from '$lib/types';
+	import { findBackendPreset, uuid } from '$lib/utils';
+	import { untrack } from 'svelte';
+
+	interface Props {
+		backend?: Backend | null;
+		defaultProtocol?: BackendProtocol;
+		open?: boolean;
+		onOpenChange?: (open: boolean) => void;
+		onSaved?: (backend: Backend) => void;
+	}
+
+	let {
+		backend = null,
+		defaultProtocol = 'openai',
+		onOpenChange,
+		onSaved,
+		open = $bindable(false)
+	}: Props = $props();
+
+	let draft = $state<Backend>(createBackend());
+	let testResult = $state<BackendTestResult | null>(null);
+	let testing = $state(false);
+	let detected = $state<BackendProtocol | null>(null);
+	let detecting = $state(false);
+	let apiKeyRequired = $state(false);
+	let detectRun = 0;
+
+	// the card follows the URL, so editing any field deselects it
+	let selectedPresetId = $derived(findBackendPreset(draft.baseUrl)?.id ?? null);
+	// presets a configured backend already points at
+	let addedPresetIds = $derived(
+		backendsStore.external
+			.map((backend) => findBackendPreset(backend.baseUrl)?.id)
+			.filter((id) => id !== undefined)
+	);
+	let unconfiguredPresets = $derived(
+		BACKEND_PRESETS.filter((preset) => !addedPresetIds.includes(preset.id))
+	);
+
+	let isEdit = $derived(backend !== null);
+	let urlError = $derived.by(() => {
+		const url = draft.baseUrl.trim();
+
+		if (!url) return 'Base URL is required';
+
+		try {
+			new URL(url);
+
+			return null;
+		} catch {
+			return 'Invalid URL format';
+		}
+	});
+	let canSave = $derived(
+		!urlError && draft.name.trim().length > 0 && (!apiKeyRequired || Boolean(draft.apiKey?.trim()))
+	);
+
+	// Backward-compatible read: older versions stored a JSON array of dismissed ids.
+	function readRecommendationsDismissed(): boolean {
+		if (!browser) return false;
+
+		const raw = localStorage.getItem(DISMISSED_RECOMMENDED_BACKENDS_LOCALSTORAGE_KEY);
+
+		if (!raw) return false;
+
+		if (raw === BooleanString.TRUE) return true;
+
+		if (raw === BooleanString.FALSE) return false;
+
+		try {
+			const parsed = JSON.parse(raw);
+
+			return Array.isArray(parsed) && parsed.length > 0;
+		} catch {
+			return false;
+		}
+	}
+
+	function writeRecommendationsDismissed(dismissed: boolean) {
+		recommendationsDismissed = dismissed;
+
+		if (browser) {
+			localStorage.setItem(
+				DISMISSED_RECOMMENDED_BACKENDS_LOCALSTORAGE_KEY,
+				dismissed ? BooleanString.TRUE : BooleanString.FALSE
+			);
+		}
+	}
+
+	let recommendationsDismissed = $state<boolean>(readRecommendationsDismissed());
+
+	let presetsToShow = $derived(recommendationsDismissed ? [] : unconfiguredPresets);
+
+	// reset the draft each time the dialog opens
+	$effect(() => {
+		if (!open) return;
+
+		draft = backend ? { ...backend } : createBackend();
+		testResult = null;
+		testing = false;
+		detected = null;
+		apiKeyRequired = false;
+	});
+
+	// Once the URL settles, ask the endpoint what it speaks, the way the MCP dialog
+	// previews a server. A preset already knows, and the answer is applied only when
+	// it differs, so this cannot feed itself.
+	$effect(() => {
+		const url = draft.baseUrl.trim();
+		// the key is a dependency: a refused probe is retried once one is typed
+		const apiKey = draft.apiKey?.trim();
+
+		if (!open || isEdit || urlError || !url) {
+			detected = null;
+			detecting = false;
+			apiKeyRequired = false;
+
+			return;
+		}
+
+		const run = ++detectRun;
+		const timer = setTimeout(async () => {
+			detecting = true;
+
+			const probe = await BackendsService.detectProtocol({
+				...draft,
+				apiKey,
+				baseUrl: url
+			});
+
+			if (run !== detectRun) return;
+
+			detecting = false;
+			detected = probe.protocol;
+			apiKeyRequired = probe.authRequired;
+
+			untrack(() => {
+				if (probe.protocol !== draft.protocol) handleChange({ protocol: probe.protocol });
+			});
+		}, 600);
+
+		return () => clearTimeout(timer);
+	});
+
+	function createBackend(): Backend {
+		return {
+			baseUrl: '',
+			enabled: true,
+			id: uuid() || `${BACKEND_ID_PREFIX}-${Date.now()}`,
+			name: '',
+			protocol: defaultProtocol
+		};
+	}
+
+	function applyPreset(preset: BackendPreset) {
+		draft = {
+			...draft,
+			baseUrl: preset.baseUrl,
+			chatPath: preset.chatPath,
+			compat: preset.compat,
+			modelsPath: preset.modelsPath,
+			name: preset.name,
+			protocol: preset.protocol
+		};
+		testResult = null;
+		detected = null;
+		apiKeyRequired = false;
+	}
+
+	function handleChange(patch: Partial<Backend>) {
+		draft = { ...draft, ...patch };
+		testResult = null;
+	}
+
+	function handleOpenChange(value: boolean) {
+		open = value;
+		onOpenChange?.(value);
+	}
+
+	async function handleTest() {
+		if (urlError) return;
+
+		testing = true;
+		testResult = null;
+
+		try {
+			testResult = await BackendsService.test(draft);
+		} finally {
+			testing = false;
+		}
+	}
+
+	function handleSave() {
+		if (!canSave) return;
+
+		const next: Backend = { ...draft, name: draft.name.trim() || hostOf(draft.baseUrl) };
+
+		if (isEdit && backend) {
+			backendsStore.updateBackend(backend.id, next);
+		} else {
+			backendsStore.addBackend(next);
+		}
+
+		onSaved?.(next);
+		handleOpenChange(false);
+	}
+
+	function handleSubmit(event: SubmitEvent) {
+		event.preventDefault();
+		handleSave();
+	}
+
+	function hostOf(url: string): string {
+		try {
+			return new URL(url).host;
+		} catch {
+			return url;
+		}
+	}
+</script>
+
+<Dialog.Root onOpenChange={handleOpenChange} {open}>
+	<Dialog.Content class="max-w-2xl!">
+		<Dialog.Header>
+			<Dialog.Title class="select-none">
+				{isEdit ? 'Edit Provider' : 'Add New Provider'}
+			</Dialog.Title>
+
+			<Dialog.Description>
+				Point at another llama-server, or connect an OpenAI-compatible endpoint.
+			</Dialog.Description>
+		</Dialog.Header>
+
+		{#if !isEdit && presetsToShow.length > 0}
+			<div class="space-y-3 pt-2">
+				<div class="flex items-center justify-between gap-3">
+					<h3 class="text-sm font-medium">Recommended providers</h3>
+
+					<Button
+						class="text-muted-foreground"
+						onclick={() => writeRecommendationsDismissed(true)}
+						size="sm"
+						variant="ghost">Dismiss</Button
+					>
+				</div>
+
+				<div class="grid grid-cols-1 gap-3 sm:grid-cols-2">
+					{#each presetsToShow as preset (preset.id)}
+						<BackendPresetCard
+							dimmed={Boolean(selectedPresetId) && selectedPresetId !== preset.id}
+							onClick={() => applyPreset(preset)}
+							{preset}
+							selected={selectedPresetId === preset.id}
+						/>
+					{/each}
+				</div>
+			</div>
+		{/if}
+
+		<form class="contents" onsubmit={handleSubmit}>
+			<div class="space-y-4 py-4">
+				<BackendForm
+					{apiKeyRequired}
+					backend={draft}
+					{detected}
+					{detecting}
+					id="backend"
+					onChange={handleChange}
+					{urlError}
+				/>
+			</div>
+
+			<!-- the last thing before the actions: what the endpoint said when asked -->
+			<div
+				aria-live="polite"
+				class="mb-3 flex items-start gap-2.5 rounded-lg border border-border/60 bg-muted/30 p-3"
+			>
+				{#if testing}
+					<Loader2 class="mt-0.5 h-4 w-4 shrink-0 animate-spin text-muted-foreground" />
+
+					<div class="min-w-0">
+						<p class="text-sm font-medium">Testing connection</p>
+
+						<p class="text-xs text-muted-foreground">
+							Asking {hostOf(draft.baseUrl)} for the models it serves.
+						</p>
+					</div>
+				{:else if testResult?.ok}
+					<CheckCircle2 class="mt-0.5 h-4 w-4 shrink-0 text-emerald-500" />
+
+					<div class="min-w-0">
+						<p class="text-sm font-medium">Connected</p>
+
+						<p class="text-xs text-muted-foreground">
+							{testResult.modelCount ?? 0}
+							model{(testResult.modelCount ?? 0) === 1 ? '' : 's'} available.
+						</p>
+					</div>
+				{:else if testResult}
+					<XCircle class="mt-0.5 h-4 w-4 shrink-0 text-destructive" />
+
+					<div class="min-w-0">
+						<p class="text-sm font-medium text-destructive">Connection failed</p>
+
+						<p class="text-xs break-words text-muted-foreground">
+							{testResult.error ?? 'The endpoint did not answer.'}{testResult.status
+								? ` (HTTP ${testResult.status})`
+								: ''}
+						</p>
+					</div>
+				{:else}
+					<PlugZap class="mt-0.5 h-4 w-4 shrink-0 text-muted-foreground" />
+
+					<div class="min-w-0">
+						<p class="text-sm font-medium">Connection not tested</p>
+
+						<p class="text-xs text-muted-foreground">
+							Test it to list the models this provider serves.
+						</p>
+					</div>
+				{/if}
+			</div>
+
+			<Dialog.Footer>
+				<Button onclick={() => handleOpenChange(false)} size="sm" variant="secondary">
+					Cancel
+				</Button>
+
+				<Button disabled={testing} onclick={handleTest} size="sm" type="button" variant="outline">
+					Test connection
+				</Button>
+
+				<Button disabled={!canSave} size="sm" type="submit">
+					{isEdit ? 'Save' : 'Add'}
+				</Button>
+			</Dialog.Footer>
+		</form>
+	</Dialog.Content>
+</Dialog.Root>
@@ -0,0 +1,6 @@
+export { default as BackendCard } from './BackendCard.svelte';
+export { default as BackendForm } from './BackendForm.svelte';
+export { default as BackendIcon } from './BackendIcon.svelte';
+export { default as BackendPresetCard } from './BackendPresetCard.svelte';
+export { default as BackendPresetIcon } from './BackendPresetIcon.svelte';
+export { default as DialogBackendForm } from './DialogBackendForm.svelte';
@@ -1,7 +1,8 @@
 <script lang="ts">
-	import { ArrowLeft, Compass } from '@lucide/svelte';
+	import { ArrowLeft, Compass, Server } from '@lucide/svelte';
 	import ModelsDiscover from '$lib/components/app/models/discover/ModelsDiscover.svelte';
 	import ModelsManager from '$lib/components/app/models/ModelsManager/ModelsManager.svelte';
+	import ModelsManagerModelProviders from '$lib/components/app/models/ModelsManager/ModelsManagerModelProviders.svelte';
 	import { Button } from '$lib/components/ui/button';
 	import * as Dialog from '$lib/components/ui/dialog';
 	import { MODEL_ICON } from '$lib/constants';
@@ -15,7 +16,7 @@

 	let { onOpenChange, open = $bindable(false) }: Props = $props();

-	type View = 'discover' | 'manage';
+	type View = 'discover' | 'manage' | 'providers';

 	/** How long a view takes to fade out before the next one fades in. */
 	const VIEW_FADE_MS = 150;
@@ -50,7 +51,9 @@
 		return () => clearTimeout(timer);
 	});

-	let title = $derived(view === 'discover' ? 'Discover' : 'Models');
+	let title = $derived(
+		view === 'discover' ? 'Discover' : view === 'providers' ? 'Providers' : 'Models'
+	);

 	// the sidebar's Discover entry opens this dialog on its Discover view
 	$effect(() => {
@@ -115,6 +118,13 @@
 							? 'opacity-100'
 							: 'opacity-0'}"
 					/>
+
+					<Server
+						class="col-start-1 row-start-1 h-5 w-5 transition-opacity duration-150 {view ===
+						'providers'
+							? 'opacity-100'
+							: 'opacity-0'}"
+					/>
 				</span>

 				<span>{title}</span>
@@ -135,12 +145,27 @@

 							Discover Models
 						</Button>
+
+						<Button
+							class="gap-1.5"
+							onclick={() => (view = 'providers')}
+							size="sm"
+							variant="tertiary"
+						>
+							<Server class="h-3.5 w-3.5" />
+
+							Manage Providers
+						</Button>
 					{/snippet}
 				</ModelsManager>
-			{:else}
+			{:else if shownView === 'discover'}
 				<div class="grid h-full overflow-hidden" style="grid-template-columns: auto 1fr;">
 					<ModelsDiscover />
 				</div>
+			{:else}
+				<div class="h-full overflow-y-auto">
+					<ModelsManagerModelProviders />
+				</div>
 			{/if}
 		</div>
 	</Dialog.Content>
@@ -1,4 +1,5 @@
 export * from './actions';
+export * from './backends';
 export * from './badges';
 export * from './chat';
 export * from './content';
@@ -0,0 +1,108 @@
+<script lang="ts">
+	import { Plus } from '@lucide/svelte';
+	import { BackendCard, DialogBackendForm } from '$lib/components/app/backends';
+	import { Button } from '$lib/components/ui/button';
+	import { backendsModelsStore, backendsStore, serverStore } from '$lib/stores';
+	import type { Backend, BackendProtocol } from '$lib/types';
+	import { fade } from 'svelte/transition';
+
+	interface Props {
+		class?: string;
+		/** Narrows the list to one protocol; omit it to list every provider at once. */
+		protocol?: BackendProtocol;
+	}
+
+	let { class: className, protocol }: Props = $props();
+
+	let backends = $derived(
+		protocol
+			? backendsStore.external.filter((b) => b.protocol === protocol)
+			: backendsStore.external
+	);
+	// the bundled server belongs to the list whenever llama.cpp providers are in it
+	let showsLocal = $derived(protocol === undefined || protocol === 'llama.cpp');
+	let addTitle = $derived(
+		protocol === 'openai'
+			? 'Add a backend'
+			: protocol === 'llama.cpp'
+				? 'Add a Llama-compatible backend'
+				: 'Add new provider'
+	);
+	let addDescription = $derived(
+		protocol === 'openai'
+			? 'Connect an OpenAI-compatible endpoint.'
+			: protocol === 'llama.cpp'
+				? 'Point at another llama-server.'
+				: 'External llama-server or connect an OpenAI-compatible API.'
+	);
+
+	let isAdding = $state(false);
+	let editing = $state<Backend | null>(null);
+
+	function handleAdd() {
+		editing = null;
+		isAdding = true;
+	}
+
+	function handleEdit(backend: Backend) {
+		editing = backend;
+		isAdding = true;
+	}
+
+	function handleOpenChange(open: boolean) {
+		isAdding = open;
+
+		if (!open) {
+			editing = null;
+		}
+	}
+</script>
+
+<div
+	in:fade={{ duration: 150 }}
+	class={['grid gap-4', className]}
+	style="grid-template-columns: repeat(auto-fill, minmax(min(25rem, calc(100dvw - 4rem)), 1fr));"
+>
+	<DialogBackendForm
+		bind:open={isAdding}
+		backend={editing}
+		defaultProtocol={protocol ?? 'llama.cpp'}
+		onOpenChange={handleOpenChange}
+		onSaved={() => void backendsModelsStore.loadAll()}
+	/>
+
+	{#if showsLocal && !serverStore.localServerMissing}
+		<BackendCard
+			backend={backendsStore.local}
+			isLocal
+			onToggle={(enabled) => backendsStore.setLocalEnabled(enabled)}
+		/>
+	{/if}
+
+	{#each backends as backend (backend.id)}
+		<BackendCard
+			{backend}
+			onDelete={() => {
+				backendsStore.removeBackend(backend.id);
+				void backendsModelsStore.loadAll();
+			}}
+			onEdit={() => handleEdit(backend)}
+			onToggle={(enabled) => {
+				backendsStore.updateBackend(backend.id, { enabled });
+				void backendsModelsStore.loadAll();
+			}}
+		/>
+	{/each}
+
+	<div
+		class="flex w-full flex-col items-center justify-center gap-4 rounded-xl border border-dashed p-6"
+	>
+		<Button onclick={handleAdd} size="sm">
+			<Plus />
+
+			{addTitle}
+		</Button>
+
+		<p class="text-xs text-muted-foreground">{addDescription}</p>
+	</div>
+</div>
@@ -47,12 +47,17 @@

 	let localConfig: SettingsConfigType = $state({ ...settingsStore.config });

+	// Snapshot used to persist only the fields edited in this dialog. Config keys
+	// that other surfaces write directly (backends, MCP servers) must not be
+	// clobbered by the dialog's save.
+	let baseline: SettingsConfigType = $state({ ...settingsStore.config });
+
 	let mobileHeader: { updateCarousel: () => void } | undefined;

 	let fetchInitiated = false;

 	$effect(() => {
-		if (serverStore.isRouterMode && currentSection.fields?.length && !fetchInitiated) {
+		if (serverStore.localIsRouter && currentSection.fields?.length && !fetchInitiated) {
 			fetchInitiated = true;

 			void modelsStore
@@ -74,6 +79,7 @@

 	function handleReset() {
 		localConfig = { ...settingsStore.config };
+		baseline = { ...settingsStore.config };
 		setMode(localConfig.theme as ColorMode);
 		mobileHeader?.updateCarousel();
 	}
@@ -94,7 +100,13 @@
 			}
 		}

-		const processedConfig = { ...localConfig };
+		const processedConfig: SettingsConfigType = {};
+
+		for (const [key, value] of Object.entries(localConfig)) {
+			if (value !== baseline[key]) {
+				processedConfig[key] = value;
+			}
+		}

 		for (const field of NUMERIC_FIELDS) {
 			if (processedConfig[field] !== undefined && processedConfig[field] !== '') {
@@ -126,6 +138,7 @@

 	export function reset() {
 		localConfig = { ...settingsStore.config };
+		baseline = { ...settingsStore.config };
 	}
 </script>

@@ -25,7 +25,7 @@
 	let currentModelParams = $derived.by(() => {
 		void modelsStore.props.cacheVersion;

-		if (serverStore.isRouterMode) {
+		if (serverStore.localIsRouter) {
 			const currentModelName = modelsStore.selectedModelName;

 			if (currentModelName) {
@@ -74,3 +74,8 @@ export { default as SettingsChatFields } from './SettingsChat/SettingsChatFields
 * server favicons and permission management controls.
 */
 export { default as SettingsChatToolsTab } from './SettingsChat/SettingsChatToolsTab.svelte';
+
+/**
+ * Providers panel for chat settings. Switches between the llama.cpp and
+ * OpenAI-compatible protocols and lists the endpoints configured for each.
+ */
@@ -0,0 +1,18 @@
+import Root from './tabs.svelte';
+import Content from './tabs-content.svelte';
+import List, { type TabsListVariant, tabsListVariants } from './tabs-list.svelte';
+import Trigger from './tabs-trigger.svelte';
+
+export {
+	Root,
+	Content,
+	List,
+	Trigger,
+	tabsListVariants,
+	type TabsListVariant,
+	//
+	Root as Tabs,
+	Content as TabsContent,
+	List as TabsList,
+	Trigger as TabsTrigger
+};
@@ -0,0 +1,17 @@
+<script lang="ts">
+	import { cn } from '$lib/components/ui/utils';
+	import { Tabs as TabsPrimitive } from 'bits-ui';
+
+	let {
+		class: className,
+		ref = $bindable(null),
+		...restProps
+	}: TabsPrimitive.ContentProps = $props();
+</script>
+
+<TabsPrimitive.Content
+	bind:ref
+	class={cn('text-sm flex-1 outline-none', className)}
+	data-slot="tabs-content"
+	{...restProps}
+/>
@@ -0,0 +1,40 @@
+<script lang="ts" module>
+	import { tv, type VariantProps } from 'tailwind-variants';
+
+	export const tabsListVariants = tv({
+		base: 'rounded-lg p-[3px] group-data-[orientation=horizontal]/tabs:h-8 data-[variant=line]:rounded-none group/tabs-list inline-flex w-fit items-center justify-center text-muted-foreground group-data-[orientation=vertical]/tabs:h-fit group-data-[orientation=vertical]/tabs:flex-col',
+		defaultVariants: {
+			variant: 'default'
+		},
+		variants: {
+			variant: {
+				default: 'bg-muted',
+				line: 'gap-1 bg-transparent'
+			}
+		}
+	});
+
+	export type TabsListVariant = VariantProps<typeof tabsListVariants>['variant'];
+</script>
+
+<script lang="ts">
+	import { cn } from '$lib/components/ui/utils';
+	import { Tabs as TabsPrimitive } from 'bits-ui';
+
+	let {
+		class: className,
+		ref = $bindable(null),
+		variant = 'default',
+		...restProps
+	}: TabsPrimitive.ListProps & {
+		variant?: TabsListVariant;
+	} = $props();
+</script>
+
+<TabsPrimitive.List
+	bind:ref
+	class={cn(tabsListVariants({ variant }), className)}
+	data-slot="tabs-list"
+	data-variant={variant}
+	{...restProps}
+/>
@@ -0,0 +1,23 @@
+<script lang="ts">
+	import { cn } from '$lib/components/ui/utils';
+	import { Tabs as TabsPrimitive } from 'bits-ui';
+
+	let {
+		class: className,
+		ref = $bindable(null),
+		...restProps
+	}: TabsPrimitive.TriggerProps = $props();
+</script>
+
+<TabsPrimitive.Trigger
+	bind:ref
+	class={cn(
+		"gap-1.5 rounded-md border border-transparent px-1.75 py-0.5 text-sm font-medium group-data-[variant=default]/tabs-list:data-[state=active]:shadow-sm group-data-[variant=line]/tabs-list:data-[state=active]:shadow-none [&_svg:not([class*='size-'])]:size-4 has-data-[icon=inline-end]:pr-1 has-data-[icon=inline-start]:pl-1 relative inline-flex h-[calc(100%_-_1px)] flex-1 items-center justify-center whitespace-nowrap text-foreground/60 transition-all group-data-[orientation=vertical]/tabs:w-full group-data-[orientation=vertical]/tabs:justify-start hover:text-foreground focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 focus-visible:outline-1 focus-visible:outline-ring disabled:pointer-events-none disabled:opacity-50 dark:text-muted-foreground dark:hover:text-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0",
+		'group-data-[variant=line]/tabs-list:bg-transparent group-data-[variant=line]/tabs-list:data-[state=active]:bg-transparent dark:group-data-[variant=line]/tabs-list:data-[state=active]:border-transparent dark:group-data-[variant=line]/tabs-list:data-[state=active]:bg-transparent',
+		'data-[state=active]:bg-background data-[state=active]:text-foreground dark:data-[state=active]:border-input dark:data-[state=active]:bg-input/30 dark:data-[state=active]:text-foreground',
+		'after:absolute after:bg-foreground after:opacity-0 after:transition-opacity group-data-[orientation=horizontal]/tabs:after:inset-x-0 group-data-[orientation=horizontal]/tabs:after:bottom-[-5px] group-data-[orientation=horizontal]/tabs:after:h-0.5 group-data-[orientation=vertical]/tabs:after:inset-y-0 group-data-[orientation=vertical]/tabs:after:-right-1 group-data-[orientation=vertical]/tabs:after:w-0.5 group-data-[variant=line]/tabs-list:data-[state=active]:after:opacity-100',
+		className
+	)}
+	data-slot="tabs-trigger"
+	{...restProps}
+/>
@@ -0,0 +1,19 @@
+<script lang="ts">
+	import { cn } from '$lib/components/ui/utils';
+	import { Tabs as TabsPrimitive } from 'bits-ui';
+
+	let {
+		class: className,
+		ref = $bindable(null),
+		value = $bindable(''),
+		...restProps
+	}: TabsPrimitive.RootProps = $props();
+</script>
+
+<TabsPrimitive.Root
+	bind:ref
+	bind:value
+	class={cn('gap-2 group/tabs flex data-[orientation=horizontal]:flex-col', className)}
+	data-slot="tabs"
+	{...restProps}
+/>
@@ -1,4 +1,9 @@
-import type { BackendCapabilities, BackendCompat, BackendProtocol } from '$lib/types';
+import type {
+	BackendCapabilities,
+	BackendCompat,
+	BackendPreset,
+	BackendProtocol
+} from '$lib/types';

 /** Prefix for generated ids of user-added backends. */
 export const BACKEND_ID_PREFIX = 'backend';
@@ -64,3 +69,31 @@ export const MODEL_CONTEXT_LENGTH_FIELDS = [

 /** Favicon extract keyed by domain, for backends with no bundled mark. */
 export const FAVICON_SERVICE_URL = 'https://www.google.com/s2/favicons?domain=';
+
+/**
+ * Ready-made endpoints offered when adding a backend.
+ *
+ * TODO: pair a llama.cpp server by scanning its QR code (WebRTC transport, so a
+ * hosted PWA can reach a server on the user's network), see
+ * ggml-org/llama.cpp#24577.
+ */
+export const BACKEND_PRESETS: readonly BackendPreset[] = [
+	{
+		baseUrl: 'https://router.huggingface.co',
+		description: 'Open models from the Hub, served by inference providers.',
+		iconUrl: '/backend-presets/huggingface.svg',
+		id: 'huggingface',
+		name: 'Hugging Face',
+		protocol: 'openai'
+	},
+	{
+		baseUrl: 'https://openrouter.ai/api',
+		description: 'Models from many providers behind a single API.',
+		// v2 brand: purple on light, lime on dark
+		iconUrlDark: '/backend-presets/openrouter-dark.svg',
+		iconUrlLight: '/backend-presets/openrouter-light.svg',
+		id: 'openrouter',
+		name: 'OpenRouter',
+		protocol: 'openai'
+	}
+];
@@ -52,6 +52,7 @@ export const REASONING_EFFORT_DEFAULT_LOCALSTORAGE_KEY = `${STORAGE_APP_NAME}.re
 export const CONVERSATION_TABS_LOCALSTORAGE_KEY = `${STORAGE_APP_NAME}.conversationTabs`;
 export const USER_OVERRIDES_LOCALSTORAGE_KEY = `${STORAGE_APP_NAME}.userOverrides`;
 export const DISMISSED_RECOMMENDED_MCP_SERVERS_LOCALSTORAGE_KEY = `${STORAGE_APP_NAME}.dismissedRecommendedMcpServers`;
+export const DISMISSED_RECOMMENDED_BACKENDS_LOCALSTORAGE_KEY = `${STORAGE_APP_NAME}.dismissedRecommendedBackends`;

 /** Key prefix for per-conversation resumable stream state, conversationId is appended */
 export const STREAM_RESUME_LOCALSTORAGE_KEY_PREFIX = `${STORAGE_APP_NAME}.streamResume.`;
@@ -10,6 +10,7 @@ import {
 	BACKEND_CAPABILITIES,
 	BACKEND_COMPAT,
 	BACKEND_ID_PREFIX,
+	BACKEND_PRESETS,
 	BACKEND_PROTOCOLS,
 	DEFAULT_BACKEND_CHAT_PATH,
 	DEFAULT_BACKEND_MODELS_PATH,
@@ -17,7 +18,13 @@ import {
 	LOCAL_BACKEND_ID,
 	MODEL_CONTEXT_LENGTH_FIELDS
 } from '$lib/constants';
-import type { Backend, BackendCapabilities, BackendCompat, BackendProtocol } from '$lib/types';
+import type {
+	Backend,
+	BackendCapabilities,
+	BackendCompat,
+	BackendPreset,
+	BackendProtocol
+} from '$lib/types';

 /** Absolute chat completions URL for a backend. */
 export function backendChatUrl(backend: Backend): string {
@@ -49,6 +56,29 @@ export function backendFaviconUrl(baseUrl: string): string | null {
 	}
 }

+/**
+ * Preset a backend was created from, matched on origin and path so a saved
+ * backend keeps its branding. Returns undefined for edited or custom URLs.
+ */
+export function findBackendPreset(baseUrl: string): BackendPreset | undefined {
+	const target = normalizeBaseUrl(baseUrl);
+
+	if (!target) return undefined;
+
+	return BACKEND_PRESETS.find((preset) => normalizeBaseUrl(preset.baseUrl) === target);
+}
+
+/** Origin and path of a URL, without a trailing slash; null when unparsable. */
+function normalizeBaseUrl(url: string): string | null {
+	try {
+		const parsed = new URL(url);
+
+		return `${parsed.origin}${parsed.pathname.replace(/\/+$/, '')}`.toLowerCase();
+	} catch {
+		return null;
+	}
+}
+
 /**
 * Features a backend supports, derived from its protocol. A missing backend
 * (unknown model, early startup) gets the plain compatible defaults.
@@ -29,6 +29,7 @@ export {
 	backendFaviconUrl,
 	backendModelsUrl,
 	createLocalBackend,
+	findBackendPreset,
 	getBackendCapabilities,
 	parseBackendsSettings
 } from './backend';
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+	/>
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+		fill="#3A3B45"
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+</svg>
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