Improve workspace sidebar and file panel

frontend/app/app/assistant.tsx

@@ -14,16 +14,9 @@ import {
 } from "@/components/assistant-ui/activity-panel";
 import { Thread } from "@/components/assistant-ui/thread";
 import { ThreadListSidebar } from "@/components/assistant-ui/threadlist-sidebar";
-import { Separator } from "@/components/ui/separator";
-import {
-	SidebarInset,
-	SidebarProvider,
-	SidebarTrigger,
-} from "@/components/ui/sidebar";
+import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar";
 import { ClawSessionReplayProvider } from "@/lib/claw-session-replay";
 import { ClawAccountGate, useClawAccount } from "./claw-account-gate";
-import { ClawLlmSettings } from "./claw-llm-settings";
-import { ClawThemeSwitcher } from "./claw-theme-switcher";
 
 export const Assistant = () => {
 	const { account, isLoading, setAccount } = useClawAccount();
@@ -83,24 +76,12 @@ export const Assistant = () => {
 			<ClawSessionReplayProvider value={{ replaySession }}>
 				<ActivityProvider>
 					<SidebarProvider>
-						<div className="flex h-dvh w-full pr-0.5">
+						<div className="flex h-dvh w-full">
 							<ThreadListSidebar
 								account={account}
 								onLogout={() => setAccount(null)}
 							/>
 							<SidebarInset>
-								<header className="flex h-16 shrink-0 items-center gap-2 border-b px-4">
-									<SidebarTrigger />
-									<Separator orientation="vertical" className="mr-2 h-4" />
-									<div className="min-w-0 flex-1">
-										<div className="truncate font-medium text-sm">新会话</div>
-										<div className="text-muted-foreground text-xs">
-											ZK Data Agent
-										</div>
-									</div>
-									<ClawThemeSwitcher />
-									<ClawLlmSettings />
-								</header>
 								<div className="flex min-h-0 flex-1 overflow-hidden">
 									<div className="min-w-0 flex-1 overflow-hidden">
 										<Thread />