refactor(header, layout): simplify header component by removing unused tabs and mobile checks; enhance RightPanel and LayoutShell with improved styling and sidebar functionality

surfsense_web/components/layout/ui/header/Header.tsx

@@ -4,12 +4,10 @@ import { useAtomValue } from "jotai";
 import { usePathname } from "next/navigation";
 import { currentThreadAtom } from "@/atoms/chat/current-thread.atom";
 import { activeSearchSpaceIdAtom } from "@/atoms/search-spaces/search-space-query.atoms";
-import { activeTabAtom, tabsAtom } from "@/atoms/tabs/tabs.atom";
+import { activeTabAtom } from "@/atoms/tabs/tabs.atom";
 import { ChatHeader } from "@/components/new-chat/chat-header";
 import { ChatShareButton } from "@/components/new-chat/chat-share-button";
-import { useIsMobile } from "@/hooks/use-mobile";
 import type { ChatVisibility, ThreadRecord } from "@/lib/chat/thread-persistence";
-import { RightPanelExpandButton } from "../right-panel/RightPanel";
 
 interface HeaderProps {
 	mobileMenuTrigger?: React.ReactNode;
@@ -18,14 +16,11 @@ interface HeaderProps {
 export function Header({ mobileMenuTrigger }: HeaderProps) {
 	const pathname = usePathname();
 	const searchSpaceId = useAtomValue(activeSearchSpaceIdAtom);
-	const isMobile = useIsMobile();
 	const activeTab = useAtomValue(activeTabAtom);
-	const tabs = useAtomValue(tabsAtom);
 
 	const isFreePage = pathname?.startsWith("/free") ?? false;
 	const isChatPage = pathname?.includes("/new-chat") ?? false;
 	const isDocumentTab = activeTab?.type === "document";
-	const hasTabBar = tabs.length > 1;
 
 	const currentThreadState = useAtomValue(currentThreadAtom);
 
@@ -72,7 +67,6 @@ export function Header({ mobileMenuTrigger }: HeaderProps) {
 				{hasThread && (
 					<ChatShareButton thread={threadForButton} onVisibilityChange={handleVisibilityChange} />
 				)}
-				{!isMobile && !hasTabBar && <RightPanelExpandButton />}
 			</div>
 		</header>
 	);

surfsense_web/components/layout/ui/right-panel/RightPanel.tsx

@@ -48,7 +48,12 @@ function CollapseButton({ onClick }: { onClick: () => void }) {
 	return (
 		<Tooltip>
 			<TooltipTrigger asChild>
-				<Button variant="ghost" size="icon" onClick={onClick} className="h-8 w-8 shrink-0">
+				<Button
+					variant="ghost"
+					size="icon"
+					onClick={onClick}
+					className="h-8 w-8 shrink-0 text-muted-foreground hover:text-foreground hover:bg-muted/40"
+				>
 					<PanelRight className="h-4 w-4" />
 					<span className="sr-only">Collapse panel</span>
 				</Button>
@@ -88,7 +93,7 @@ export function RightPanelExpandButton() {
 						variant="ghost"
 						size="icon"
 						onClick={() => startTransition(() => setCollapsed(false))}
-						className="h-8 w-8 shrink-0 -m-0.5"
+						className="h-8 w-8 shrink-0 -m-0.5 text-muted-foreground hover:text-foreground hover:bg-muted/40"
 					>
 						<PanelRight className="h-4 w-4" />
 						<span className="sr-only">Expand panel</span>
@@ -161,7 +166,7 @@ export function RightPanel({ documentsPanel }: RightPanelProps) {
 	return (
 		<aside
 			style={{ width: targetWidth }}
-			className="flex h-full shrink-0 flex-col rounded-xl border bg-sidebar text-sidebar-foreground overflow-hidden transition-[width] duration-200 ease-out"
+			className="flex h-full shrink-0 flex-col border-l border-b bg-sidebar text-sidebar-foreground overflow-hidden transition-[width] duration-200 ease-out"
 		>
 			<div className="relative flex-1 min-h-0 overflow-hidden">
 				{effectiveTab === "sources" && documentsOpen && documentsPanel && (

surfsense_web/components/layout/ui/shell/LayoutShell.tsx

@@ -120,22 +120,45 @@ interface LayoutShellProps {
 
 function MainContentPanel({
 	isChatPage,
+	isSidebarCollapsed,
 	onTabSwitch,
 	onNewChat,
 	leftActions,
+	showResizeHandle = false,
+	onResizeMouseDown,
 	children,
 }: {
 	isChatPage: boolean;
+	isSidebarCollapsed: boolean;
 	onTabSwitch?: (tab: Tab) => void;
 	onNewChat?: () => void;
 	leftActions?: React.ReactNode;
+	showResizeHandle?: boolean;
+	onResizeMouseDown?: (e: React.MouseEvent) => void;
 	children: React.ReactNode;
 }) {
 	const activeTab = useAtomValue(activeTabAtom);
 	const isDocumentTab = activeTab?.type === "document";
 
 	return (
-		<div className="relative flex flex-1 flex-col min-w-0">
+		<div
+			className={cn(
+				"relative flex flex-1 flex-col min-w-0 -ml-2",
+				isSidebarCollapsed ? "" : "border-l border-border/60"
+			)}
+		>
+			{showResizeHandle && onResizeMouseDown && (
+				<div
+					role="slider"
+					aria-label="Resize sidebar"
+					aria-valuemin={0}
+					aria-valuemax={100}
+					aria-valuenow={50}
+					tabIndex={0}
+					onMouseDown={onResizeMouseDown}
+					className="absolute left-0 top-0 hidden md:block h-full w-2 -translate-x-1/2 cursor-col-resize z-30 focus:outline-none"
+				/>
+			)}
 			<TabBar
 				onTabSwitch={onTabSwitch}
 				onNewChat={onNewChat}
@@ -143,7 +166,7 @@ function MainContentPanel({
 				rightActions={<RightPanelExpandButton />}
 				className="min-w-0"
 			/>
-			<div className="relative flex flex-1 flex-col rounded-xl border bg-main-panel overflow-hidden min-w-0">
+			<div className="relative flex flex-1 flex-col border border-l-0 border-r-0 border-t-0 bg-main-panel overflow-hidden min-w-0">
 				<Header />
 
 				{isDocumentTab && activeTab.documentId && activeTab.searchSpaceId ? (
@@ -515,26 +538,14 @@ export function LayoutShell({
 						</SidebarSlideOutPanel>
 					</div>
 
-					{/* Resize handle — negative margins eat the flex gap so spacing stays unchanged */}
-					{!isCollapsed && (
-						<div
-							role="slider"
-							aria-label="Resize sidebar"
-							aria-valuemin={0}
-							aria-valuemax={100}
-							aria-valuenow={50}
-							tabIndex={0}
-							onMouseDown={onResizeMouseDown}
-							className="hidden md:block h-full cursor-col-resize z-30 focus:outline-none"
-							style={{ width: 8, marginLeft: -8, marginRight: -8 }}
-						/>
-					)}
-
 					{/* Main content panel */}
 					<MainContentPanel
 						isChatPage={isChatPage}
+						isSidebarCollapsed={isCollapsed}
 						onTabSwitch={onTabSwitch}
 						onNewChat={onNewChat}
+						showResizeHandle={!isCollapsed}
+						onResizeMouseDown={onResizeMouseDown}
 						leftActions={
 							isCollapsed ? (
 								<SidebarCollapseButton isCollapsed={isCollapsed} onToggle={toggleCollapsed} />
@@ -546,12 +557,14 @@ export function LayoutShell({
 
 					{/* Right panel — tabbed Sources/Report (desktop only) */}
 					{documentsPanel && (
-						<RightPanel
-							documentsPanel={{
-								open: documentsPanel.open,
-								onOpenChange: documentsPanel.onOpenChange,
-							}}
-						/>
+						<div className="-ml-2 -mr-2">
+							<RightPanel
+								documentsPanel={{
+									open: documentsPanel.open,
+									onOpenChange: documentsPanel.onOpenChange,
+								}}
+							/>
+						</div>
 					)}
 				</div>
 			</TooltipProvider>

surfsense_web/components/layout/ui/sidebar/DocumentsSidebar.tsx

@@ -1207,7 +1207,7 @@ function AuthenticatedDocumentsSidebarBase({
 
 	const documentsContent = (
 		<>
-			<div className="shrink-0 flex h-12 items-center px-4">
+			<div className="shrink-0 flex h-12 items-center px-3 border-b">
 				<div className="flex w-full items-center justify-between">
 					<div className="flex items-center gap-3">
 						{isMobile && (
@@ -1692,7 +1692,7 @@ function AnonymousDocumentsSidebar({
 			/>
 
 			{/* Header */}
-			<div className="shrink-0 flex h-12 items-center px-4">
+			<div className="shrink-0 flex h-12 items-center px-3 border-b">
 				<div className="flex w-full items-center justify-between">
 					<div className="flex items-center gap-2">
 						<h2 className="select-none text-base font-semibold">{t("title") || "Documents"}</h2>

surfsense_web/components/layout/ui/sidebar/SidebarCollapseButton.tsx

@@ -22,7 +22,12 @@ export function SidebarCollapseButton({
 	const { shortcutKeys } = usePlatformShortcut();
 
 	const button = (
-		<Button variant="ghost" size="icon" onClick={onToggle} className="h-8 w-8 shrink-0">
+		<Button
+			variant="ghost"
+			size="icon"
+			onClick={onToggle}
+			className="h-8 w-8 shrink-0 text-muted-foreground hover:text-foreground hover:bg-muted/40"
+		>
 			<PanelLeft className="h-4 w-4" />
 			<span className="sr-only">{isCollapsed ? t("expand_sidebar") : t("collapse_sidebar")}</span>
 		</Button>

surfsense_web/components/layout/ui/tabs/TabBar.tsx

@@ -77,21 +77,19 @@ export function TabBar({
 
 	// Keep action slots visible even with one/no tabs
 	const hasAuxActions = !!leftActions || !!rightActions || !!onNewChat;
-	const hasMultipleChats = tabs.length > 1;
 	if (tabs.length <= 1 && !hasAuxActions) return null;
 
 	return (
 		<div
 			className={cn(
-				"mb-2 flex h-9 items-center shrink-0 px-1 gap-0.5 select-none",
-				hasMultipleChats && "mt-1",
+				"mb-0 flex h-12 items-center shrink-0 px-1 gap-0.5 select-none border-b border-border/60",
 				className
 			)}
 		>
 			{leftActions ? <div className="flex items-center gap-0.5 shrink-0">{leftActions}</div> : null}
 			<div
 				ref={scrollRef}
-				className="flex h-full items-center flex-1 gap-0.5 overflow-x-auto overflow-y-hidden scrollbar-hide [scrollbar-width:none] [-ms-overflow-style:none] [&::-webkit-scrollbar]:hidden py-1"
+				className="flex h-8 items-center flex-1 gap-3 overflow-x-auto overflow-y-hidden scrollbar-hide [scrollbar-width:none] [-ms-overflow-style:none] [&::-webkit-scrollbar]:hidden py-0"
 			>
 				{tabs.map((tab) => {
 					const isActive = tab.id === activeTabId;
@@ -103,7 +101,7 @@ export function TabBar({
 							data-tab-id={tab.id}
 							onClick={() => handleTabClick(tab)}
 							className={cn(
-								"group relative flex h-full w-[150px] items-center px-3 min-h-0 overflow-hidden text-[13px] font-medium rounded-lg transition-all duration-150 shrink-0",
+								"group relative flex h-full w-[150px] items-center px-3 min-h-0 overflow-hidden text-[13px] font-medium rounded-md transition-all duration-150 shrink-0",
 								isActive
 									? "bg-muted/60 text-foreground"
 									: "bg-transparent text-muted-foreground hover:bg-muted/30 hover:text-foreground"
@@ -136,15 +134,15 @@ export function TabBar({
 					);
 				})}
 			</div>
-			<div className="flex items-center gap-0.5 shrink-0">
+			<div className="flex items-center gap-0.5 shrink-0 pr-2">
 				{onNewChat && (
 					<button
 						type="button"
 						onClick={onNewChat}
-						className="flex h-6 w-6 items-center justify-center shrink-0 rounded-md text-muted-foreground transition-all duration-150 hover:text-foreground hover:bg-muted/40"
+						className="flex h-8 w-8 items-center justify-center shrink-0 rounded-md text-muted-foreground transition-all duration-150 hover:text-foreground hover:bg-muted/40"
 						title="New Chat"
 					>
-						<Plus className="size-3.5" />
+						<Plus className="size-4" />
 					</button>
 				)}
 				{rightActions}