diff --git a/tools/server/public/index.html.gz b/tools/server/public/index.html.gz
index c02b55f5f27a5..c1e6841d38d2b 100644
Binary files a/tools/server/public/index.html.gz and b/tools/server/public/index.html.gz differ
diff --git a/tools/server/webui/src/app.css b/tools/server/webui/src/app.css
index a9ac80ab9cf00..c74319936149d 100644
--- a/tools/server/webui/src/app.css
+++ b/tools/server/webui/src/app.css
@@ -39,6 +39,7 @@
 	--sidebar-ring: oklch(0.708 0 0);
 	--code-background: oklch(0.225 0 0);
 	--code-foreground: oklch(0.875 0 0);
+	--layer-popover: 1000000;
 }
 
 .dark {
diff --git a/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsDialog.svelte b/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsDialog.svelte
index ebe86c9ccad1b..2099536d74301 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsDialog.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsDialog.svelte
@@ -362,7 +362,8 @@
 
 <Dialog.Root {open} onOpenChange={handleClose}>
 	<Dialog.Content
-		class="z-999999 flex h-[100vh] flex-col gap-0 rounded-none p-0 md:h-[64vh] md:rounded-lg"
+		class="z-999999 flex h-[100dvh] max-h-[100dvh] min-h-[100dvh] flex-col gap-0 rounded-none p-0
+			md:h-[64vh] md:max-h-[64vh] md:min-h-0 md:rounded-lg"
 		style="max-width: 48rem;"
 	>
 		<div class="flex flex-1 flex-col overflow-hidden md:flex-row">
@@ -441,7 +442,7 @@
 				</div>
 			</div>
 
-			<ScrollArea class="max-h-[calc(100vh-13.5rem)] flex-1">
+			<ScrollArea class="max-h-[calc(100dvh-13.5rem)] flex-1 md:max-h-[calc(100vh-13.5rem)]">
 				<div class="space-y-6 p-4 md:p-6">
 					<div>
 						<div class="mb-6 flex hidden items-center gap-2 border-b border-border/30 pb-6 md:flex">
diff --git a/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFields.svelte b/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFields.svelte
index 7e11b2a92fe88..e06399e0bc163 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFields.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFields.svelte
@@ -5,7 +5,6 @@
 	import * as Select from '$lib/components/ui/select';
 	import { Textarea } from '$lib/components/ui/textarea';
 	import { SETTING_CONFIG_DEFAULT, SETTING_CONFIG_INFO } from '$lib/constants/settings-config';
-	import { IsMobile } from '$lib/hooks/is-mobile.svelte';
 	import { supportsVision } from '$lib/stores/server.svelte';
 	import type { Component } from 'svelte';
 
@@ -17,8 +16,6 @@
 	}
 
 	let { fields, localConfig, onConfigChange, onThemeChange }: Props = $props();
-
-	let isMobile = $state(new IsMobile());
 </script>
 
 {#each fields as field (field.key)}
@@ -33,7 +30,7 @@
 				value={String(localConfig[field.key] ?? '')}
 				onchange={(e) => onConfigChange(field.key, e.currentTarget.value)}
 				placeholder={`Default: ${SETTING_CONFIG_DEFAULT[field.key] ?? 'none'}`}
-				class={isMobile ? 'w-full' : 'max-w-md'}
+				class="w-full md:max-w-md"
 			/>
 			{#if field.help || SETTING_CONFIG_INFO[field.key]}
 				<p class="mt-1 text-xs text-muted-foreground">
@@ -50,7 +47,7 @@
 				value={String(localConfig[field.key] ?? '')}
 				onchange={(e) => onConfigChange(field.key, e.currentTarget.value)}
 				placeholder={`Default: ${SETTING_CONFIG_DEFAULT[field.key] ?? 'none'}`}
-				class={isMobile ? 'min-h-[100px] w-full' : 'min-h-[100px] max-w-2xl'}
+				class="min-h-[100px] w-full md:max-w-2xl"
 			/>
 			{#if field.help || SETTING_CONFIG_INFO[field.key]}
 				<p class="mt-1 text-xs text-muted-foreground">
@@ -78,7 +75,7 @@
 					}
 				}}
 			>
-				<Select.Trigger class={isMobile ? 'w-full' : 'max-w-md'}>
+				<Select.Trigger class="w-full md:w-auto md:max-w-md">
 					<div class="flex items-center gap-2">
 						{#if selectedOption?.icon}
 							{@const IconComponent = selectedOption.icon}
diff --git a/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFooter.svelte b/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFooter.svelte
index e862cdb2bc68a..3408fe3ce4257 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFooter.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatSettings/ChatSettingsFooter.svelte
@@ -1,5 +1,6 @@
 <script lang="ts">
 	import { Button } from '$lib/components/ui/button';
+	import * as AlertDialog from '$lib/components/ui/alert-dialog';
 
 	interface Props {
 		onReset?: () => void;
@@ -8,8 +9,15 @@
 
 	let { onReset, onSave }: Props = $props();
 
-	function handleReset() {
+	let showResetDialog = $state(false);
+
+	function handleResetClick() {
+		showResetDialog = true;
+	}
+
+	function handleConfirmReset() {
 		onReset?.();
+		showResetDialog = false;
 	}
 
 	function handleSave() {
@@ -18,7 +26,23 @@
 </script>
 
 <div class="flex justify-between border-t border-border/30 p-6">
-	<Button variant="outline" onclick={handleReset}>Reset to default</Button>
+	<Button variant="outline" onclick={handleResetClick}>Reset to default</Button>
 
 	<Button onclick={handleSave}>Save settings</Button>
 </div>
+
+<AlertDialog.Root bind:open={showResetDialog}>
+	<AlertDialog.Content>
+		<AlertDialog.Header>
+			<AlertDialog.Title>Reset Settings to Default</AlertDialog.Title>
+			<AlertDialog.Description>
+				Are you sure you want to reset all settings to their default values? This action cannot be
+				undone and will permanently remove all your custom configurations.
+			</AlertDialog.Description>
+		</AlertDialog.Header>
+		<AlertDialog.Footer>
+			<AlertDialog.Cancel>Cancel</AlertDialog.Cancel>
+			<AlertDialog.Action onclick={handleConfirmReset}>Reset to Default</AlertDialog.Action>
+		</AlertDialog.Footer>
+	</AlertDialog.Content>
+</AlertDialog.Root>
diff --git a/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebar.svelte b/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebar.svelte
index 6af348e696da7..8dd4b20dcbb97 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebar.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebar.svelte
@@ -87,7 +87,7 @@
 		<Sidebar.GroupContent>
 			<Sidebar.Menu>
 				{#each filteredConversations as conversation (conversation.id)}
-					<Sidebar.MenuItem class="mb-1" onclick={handleMobileSidebarItemClick}>
+					<Sidebar.MenuItem class="mb-1">
 						<ChatSidebarConversationItem
 							conversation={{
 								id: conversation.id,
@@ -95,6 +95,7 @@
 								lastModified: conversation.lastModified,
 								currNode: conversation.currNode
 							}}
+							{handleMobileSidebarItemClick}
 							isActive={currentChatId === conversation.id}
 							onSelect={selectConversation}
 							onEdit={editConversation}
diff --git a/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebarConversationItem.svelte b/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebarConversationItem.svelte
index 71b4d1d5bdb41..6c3fb5764eb95 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebarConversationItem.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatSidebar/ChatSidebarConversationItem.svelte
@@ -8,6 +8,7 @@
 	interface Props {
 		isActive?: boolean;
 		conversation: DatabaseConversation;
+		handleMobileSidebarItemClick?: () => void;
 		onDelete?: (id: string) => void;
 		onEdit?: (id: string, name: string) => void;
 		onSelect?: (id: string) => void;
@@ -16,6 +17,7 @@
 
 	let {
 		conversation,
+		handleMobileSidebarItemClick,
 		onDelete,
 		onEdit,
 		onSelect,
@@ -47,6 +49,7 @@
 
 	function handleConfirmEdit() {
 		if (!editedName.trim()) return;
+		showEditDialog = false;
 		onEdit?.(conversation.id, editedName);
 	}
 
@@ -85,7 +88,12 @@
 		: ''}"
 	onclick={handleSelect}
 >
-	<div class="text flex min-w-0 flex-1 items-center space-x-3">
+	<!-- svelte-ignore a11y_click_events_have_key_events -->
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
+	<div
+		class="text flex min-w-0 flex-1 items-center space-x-3"
+		onclick={handleMobileSidebarItemClick}
+	>
 		<div class="min-w-0 flex-1">
 			<p class="truncate text-sm font-medium">{conversation.name}</p>
 
@@ -178,5 +186,10 @@
 		&:is(:hover) :global([data-slot='dropdown-menu-trigger']) {
 			opacity: 1;
 		}
+		@media (max-width: 768px) {
+			:global([data-slot='dropdown-menu-trigger']) {
+				opacity: 1 !important;
+			}
+		}
 	}
 </style>
diff --git a/tools/server/webui/src/lib/components/app/misc/ActionDropdown.svelte b/tools/server/webui/src/lib/components/app/misc/ActionDropdown.svelte
index e06bbc5086721..da29e2584f967 100644
--- a/tools/server/webui/src/lib/components/app/misc/ActionDropdown.svelte
+++ b/tools/server/webui/src/lib/components/app/misc/ActionDropdown.svelte
@@ -37,6 +37,7 @@
 <DropdownMenu.Root bind:open>
 	<DropdownMenu.Trigger
 		class="flex h-6 w-6 cursor-pointer items-center justify-center rounded-md p-0 text-sm font-medium transition-colors hover:bg-accent hover:text-accent-foreground focus:bg-accent focus:text-accent-foreground focus:outline-none disabled:pointer-events-none disabled:opacity-50 data-[state=open]:bg-accent data-[state=open]:text-accent-foreground {triggerClass}"
+		onclick={(e) => e.stopPropagation()}
 	>
 		{#if triggerTooltip}
 			<Tooltip.Root delayDuration={TOOLTIP_DELAY_DURATION}>
@@ -53,7 +54,7 @@
 		{/if}
 	</DropdownMenu.Trigger>
 
-	<DropdownMenu.Content {align} class="z-999 w-48">
+	<DropdownMenu.Content {align} class="z-[999999] w-48">
 		{#each actions as action, index (action.label)}
 			{#if action.separator && index > 0}
 				<DropdownMenu.Separator />
diff --git a/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-content.svelte b/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-content.svelte
index 2d4a8fd62d4a3..2398daee70b59 100644
--- a/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-content.svelte
+++ b/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-content.svelte
@@ -19,7 +19,15 @@
 		bind:ref
 		data-slot="alert-dialog-content"
 		class={cn(
-			'fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border bg-background p-6 shadow-lg duration-200 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95 sm:max-w-lg',
+			'fixed z-[999999] grid w-full gap-4 border bg-background p-6 shadow-lg duration-200',
+			// Mobile: Bottom sheet behavior
+			'right-0 bottom-0 left-0 max-h-[100dvh] translate-x-0 translate-y-0 overflow-y-auto rounded-t-lg',
+			'data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:slide-out-to-bottom-full',
+			'data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:slide-in-from-bottom-full',
+			// Desktop: Centered dialog behavior
+			'sm:top-[50%] sm:right-auto sm:bottom-auto sm:left-[50%] sm:max-h-[100vh] sm:max-w-lg sm:translate-x-[-50%] sm:translate-y-[-50%] sm:rounded-lg',
+			'sm:data-[state=closed]:slide-out-to-bottom-0 sm:data-[state=closed]:zoom-out-95',
+			'sm:data-[state=open]:slide-in-from-bottom-0 sm:data-[state=open]:zoom-in-95',
 			className
 		)}
 		{...restProps}
diff --git a/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-footer.svelte b/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-footer.svelte
index 4b55eb65d155a..da0f7be74b65a 100644
--- a/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-footer.svelte
+++ b/tools/server/webui/src/lib/components/ui/alert-dialog/alert-dialog-footer.svelte
@@ -13,7 +13,10 @@
 <div
 	bind:this={ref}
 	data-slot="alert-dialog-footer"
-	class={cn('flex flex-col-reverse gap-2 sm:flex-row sm:justify-end', className)}
+	class={cn(
+		'mt-6 flex flex-row gap-2 sm:mt-0 sm:justify-end [&>*]:flex-1 sm:[&>*]:flex-none',
+		className
+	)}
 	{...restProps}
 >
 	{@render children?.()}
diff --git a/tools/server/webui/src/lib/components/ui/dialog/dialog-content.svelte b/tools/server/webui/src/lib/components/ui/dialog/dialog-content.svelte
index 93d97bc4a6687..74df0eacb5708 100644
--- a/tools/server/webui/src/lib/components/ui/dialog/dialog-content.svelte
+++ b/tools/server/webui/src/lib/components/ui/dialog/dialog-content.svelte
@@ -25,7 +25,7 @@
 		bind:ref
 		data-slot="dialog-content"
 		class={cn(
-			'fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border border-border/30 bg-background p-6 shadow-lg duration-200 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95 sm:max-w-lg',
+			`fixed top-[50%] left-[50%] z-50 grid max-h-[100dvh] w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 overflow-y-auto rounded-lg border border-border/30 bg-background p-6 shadow-lg duration-200 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95 sm:max-w-lg md:max-h-[100vh]`,
 			className
 		)}
 		{...restProps}
diff --git a/tools/server/webui/src/lib/components/ui/select/select-content.svelte b/tools/server/webui/src/lib/components/ui/select/select-content.svelte
index a5199584b64f2..4050628cc8769 100644
--- a/tools/server/webui/src/lib/components/ui/select/select-content.svelte
+++ b/tools/server/webui/src/lib/components/ui/select/select-content.svelte
@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { onDestroy, onMount } from 'svelte';
 	import { Select as SelectPrimitive } from 'bits-ui';
 	import SelectScrollUpButton from './select-scroll-up-button.svelte';
 	import SelectScrollDownButton from './select-scroll-down-button.svelte';
@@ -14,6 +15,76 @@
 	}: WithoutChild<SelectPrimitive.ContentProps> & {
 		portalProps?: SelectPrimitive.PortalProps;
 	} = $props();
+
+	let cleanupInternalListeners: (() => void) | undefined;
+
+	onMount(() => {
+		const listenerOptions: AddEventListenerOptions = { passive: false };
+
+		const blockOutsideWheel = (event: WheelEvent) => {
+			if (!ref) {
+				return;
+			}
+
+			const target = event.target as Node | null;
+
+			if (!target || !ref.contains(target)) {
+				event.preventDefault();
+				event.stopPropagation();
+			}
+		};
+
+		const blockOutsideTouchMove = (event: TouchEvent) => {
+			if (!ref) {
+				return;
+			}
+
+			const target = event.target as Node | null;
+
+			if (!target || !ref.contains(target)) {
+				event.preventDefault();
+				event.stopPropagation();
+			}
+		};
+
+		document.addEventListener('wheel', blockOutsideWheel, listenerOptions);
+		document.addEventListener('touchmove', blockOutsideTouchMove, listenerOptions);
+
+		return () => {
+			document.removeEventListener('wheel', blockOutsideWheel, listenerOptions);
+			document.removeEventListener('touchmove', blockOutsideTouchMove, listenerOptions);
+		};
+	});
+
+	$effect(() => {
+		const element = ref;
+
+		cleanupInternalListeners?.();
+
+		if (!element) {
+			return;
+		}
+
+		const stopWheelPropagation = (event: WheelEvent) => {
+			event.stopPropagation();
+		};
+
+		const stopTouchPropagation = (event: TouchEvent) => {
+			event.stopPropagation();
+		};
+
+		element.addEventListener('wheel', stopWheelPropagation);
+		element.addEventListener('touchmove', stopTouchPropagation);
+
+		cleanupInternalListeners = () => {
+			element.removeEventListener('wheel', stopWheelPropagation);
+			element.removeEventListener('touchmove', stopTouchPropagation);
+		};
+	});
+
+	onDestroy(() => {
+		cleanupInternalListeners?.();
+	});
 </script>
 
 <SelectPrimitive.Portal {...portalProps}>
@@ -22,7 +93,7 @@
 		{sideOffset}
 		data-slot="select-content"
 		class={cn(
-			'relative z-50 max-h-(--bits-select-content-available-height) min-w-[8rem] origin-(--bits-select-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border bg-popover text-popover-foreground shadow-md data-[side=bottom]:translate-y-1 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:-translate-x-1 data-[side=left]:slide-in-from-right-2 data-[side=right]:translate-x-1 data-[side=right]:slide-in-from-left-2 data-[side=top]:-translate-y-1 data-[side=top]:slide-in-from-bottom-2 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95',
+			'relative z-[var(--layer-popover,1000000)] max-h-(--bits-select-content-available-height) min-w-[8rem] origin-(--bits-select-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border bg-popover text-popover-foreground shadow-md data-[side=bottom]:translate-y-1 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:-translate-x-1 data-[side=left]:slide-in-from-right-2 data-[side=right]:translate-x-1 data-[side=right]:slide-in-from-left-2 data-[side=top]:-translate-y-1 data-[side=top]:slide-in-from-bottom-2 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95',
 			className
 		)}
 		{...restProps}