feat: change the default path to /chat

web/src/app/chat/main.tsx

@@ -0,0 +1,54 @@
+// Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
+// SPDX-License-Identifier: MIT
+
+"use client";
+
+import { GithubOutlined } from "@ant-design/icons";
+import Link from "next/link";
+import { useMemo } from "react";
+
+import { Button } from "~/components/ui/button";
+import { useReplay } from "~/core/replay";
+import { useStore } from "~/core/store";
+import { cn } from "~/lib/utils";
+
+import { Logo } from "../_components/logo";
+import { MessagesBlock } from "../_components/messages-block";
+import { ResearchBlock } from "../_components/research-block";
+import { ThemeToggle } from "../_components/theme-toggle";
+import { Tooltip } from "../_components/tooltip";
+import { SettingsDialog } from "../_settings/dialogs/settings-dialog";
+
+export default function Main() {
+  const { isReplay } = useReplay();
+  const openResearchId = useStore((state) => state.openResearchId);
+  const doubleColumnMode = useMemo(
+    () => openResearchId !== null,
+    [openResearchId],
+  );
+  return (
+    <div
+      className={cn(
+        "flex h-full w-full justify-center px-4 pt-12 pb-4",
+        doubleColumnMode && "gap-8",
+      )}
+    >
+      <MessagesBlock
+        className={cn(
+          "shrink-0 transition-all duration-300 ease-out",
+          !doubleColumnMode &&
+            `w-[768px] translate-x-[min(calc((100vw-538px)*0.75/2),960px/2)]`,
+          doubleColumnMode && `w-[538px]`,
+        )}
+      />
+      <ResearchBlock
+        className={cn(
+          "w-[min(calc((100vw-538px)*0.75),960px)] pb-4 transition-all duration-300 ease-out",
+          !doubleColumnMode && "scale-0",
+          doubleColumnMode && "",
+        )}
+        researchId={openResearchId}
+      />
+    </div>
+  );
+}