refactor: refine folder structure and rename

frontend/src/app/workspace/chats/[thread_id]/page.tsx

@@ -17,8 +17,12 @@ import {
   WorkspaceFooter,
 } from "@/components/workspace/workspace-container";
 import { getLangGraphClient } from "@/core/api";
-import type { MessageThread, MessageThreadState } from "@/core/thread";
-import { titleOfThread } from "@/core/thread/utils";
+import type {
+  AgentThread,
+  AgentThreadContext,
+  AgentThreadState,
+} from "@/core/threads";
+import { titleOfThread } from "@/core/threads/utils";
 import { uuid } from "@/core/utils/uuid";
 
 const langGraphClient = getLangGraphClient();
@@ -32,6 +36,11 @@ export default function ChatPage() {
     [threadIdFromPath],
   );
   const [threadId, setThreadId] = useState<string | null>(null);
+  const [threadContext, setThreadContext] = useState<AgentThreadContext>({
+    thread_id: "",
+    model: "deepseek-v3.2",
+    thinking_enabled: true,
+  });
   useEffect(() => {
     if (threadIdFromPath !== "new") {
       setThreadId(threadIdFromPath);
@@ -39,7 +48,7 @@ export default function ChatPage() {
       setThreadId(uuid());
     }
   }, [threadIdFromPath]);
-  const thread = useStream<MessageThreadState>({
+  const thread = useStream<AgentThreadState>({
     client: langGraphClient,
     assistantId: "lead_agent",
     threadId: !isNewThread ? threadId : undefined,
@@ -74,15 +83,14 @@ export default function ChatPage() {
           streamSubgraphs: true,
           streamResumable: true,
           context: {
+            ...threadContext,
             thread_id: threadId!,
-            model: "deepseek-v3.2",
-            thinking_enabled: true,
           },
         },
       );
       void queryClient.invalidateQueries({ queryKey: ["threads", "search"] });
     },
-    [isNewThread, queryClient, router, thread, threadId],
+    [isNewThread, queryClient, router, thread, threadContext, threadId],
   );
   const handleStop = useCallback(async () => {
     await thread.stop();
@@ -93,7 +101,7 @@ export default function ChatPage() {
         <BreadcrumbItem className="hidden md:block">
           {isNewThread
             ? "New"
-            : titleOfThread(thread as unknown as MessageThread)}
+            : titleOfThread(thread as unknown as AgentThread)}
         </BreadcrumbItem>
       </WorkspaceHeader>
       <WorkspaceBody>

frontend/src/app/workspace/threads/[thread_id]/page.tsx

@@ -4,13 +4,13 @@ import { useStream } from "@langchain/langgraph-sdk/react";
 import { useParams } from "next/navigation";
 
 import { getLangGraphClient } from "@/core/api";
-import type { MessageThreadState } from "@/core/thread";
+import type { AgentThreadState } from "@/core/threads";
 
 const apiClient = getLangGraphClient();
 
 export default function TestPage() {
   const { thread_id: threadId } = useParams<{ thread_id: string }>();
-  const thread = useStream<MessageThreadState>({
+  const thread = useStream<AgentThreadState>({
     client: apiClient,
     assistantId: "lead_agent",
     threadId,

frontend/src/components/workspace/input-box.tsx

@@ -1,9 +1,11 @@
 import type { ChatStatus } from "ai";
+import { LightbulbIcon, LightbulbOffIcon } from "lucide-react";
 import { useCallback, type ComponentProps } from "react";
 
 import {
   PromptInput,
   PromptInputBody,
+  PromptInputButton,
   PromptInputFooter,
   PromptInputSubmit,
   PromptInputTextarea,
@@ -11,6 +13,8 @@ import {
 } from "@/components/ai-elements/prompt-input";
 import { cn } from "@/lib/utils";
 
+import { Tooltip } from "./tooltip";
+
 export function InputBox({
   className,
   autoFocus,
@@ -57,7 +61,13 @@ export function InputBox({
         />
       </PromptInputBody>
       <PromptInputFooter className="flex">
-        <div></div>
+        <div>
+          <Tooltip content="">
+            <PromptInputButton>
+              <LightbulbOffIcon className="size-4" />
+            </PromptInputButton>
+          </Tooltip>
+        </div>
         <div className="flex items-center gap-2">
           <PromptInputSubmit
             className="rounded-full"

frontend/src/components/workspace/message-list/message-group.tsx

@@ -21,14 +21,13 @@ import {
   ChainOfThoughtStep,
 } from "@/components/ai-elements/chain-of-thought";
 import { MessageResponse } from "@/components/ai-elements/message";
-import { useRehypeSplitWordsIntoSpans } from "@/core/rehype";
-import { extractTitleFromMarkdown } from "@/core/utils/markdown";
-import { cn } from "@/lib/utils";
-
 import {
   extractReasoningContentFromMessage,
   findToolCallResult,
-} from "./utils";
+} from "@/core/messages/utils";
+import { useRehypeSplitWordsIntoSpans } from "@/core/rehype";
+import { extractTitleFromMarkdown } from "@/core/utils/markdown";
+import { cn } from "@/lib/utils";
 
 export function MessageGroup({
   className,

frontend/src/components/workspace/message-list/message-list-item.tsx

@@ -6,11 +6,15 @@ import {
   MessageContent as AIElementMessageContent,
   MessageResponse as AIElementMessageResponse,
 } from "@/components/ai-elements/message";
+import {
+  extractContentFromMessage,
+  hasReasoning,
+  hasToolCalls,
+} from "@/core/messages/utils";
 import { useRehypeSplitWordsIntoSpans } from "@/core/rehype";
 import { cn } from "@/lib/utils";
 
 import { MessageGroup } from "./message-group";
-import { extractContentFromMessage, hasReasoning, hasToolCalls } from "./utils";
 
 export function MessageListItem({
   className,

frontend/src/components/workspace/message-list/message-list.tsx

@@ -5,7 +5,8 @@ import {
   ConversationContent,
   ConversationScrollButton,
 } from "@/components/ai-elements/conversation";
-import type { MessageThreadState } from "@/core/thread";
+import { groupMessages, hasContent } from "@/core/messages/utils";
+import type { AgentThreadState } from "@/core/threads";
 import { cn } from "@/lib/utils";
 
 import { StreamingIndicator } from "../streaming-indicator";
@@ -13,14 +14,13 @@ import { StreamingIndicator } from "../streaming-indicator";
 import { MessageGroup } from "./message-group";
 import { MessageListItem } from "./message-list-item";
 import { MessageListSkeleton } from "./skeleton";
-import { groupMessages, hasContent } from "./utils";
 
 export function MessageList({
   className,
   thread,
 }: {
   className?: string;
-  thread: UseStream<MessageThreadState>;
+  thread: UseStream<AgentThreadState>;
 }) {
   if (thread.isThreadLoading) {
     return <MessageListSkeleton />;

frontend/src/components/workspace/recent-chat-list.tsx

@@ -21,7 +21,7 @@ import {
   SidebarMenuItem,
 } from "@/components/ui/sidebar";
 import { useDeleteThread, useThreads } from "@/core/api";
-import { pathOfThread, titleOfThread } from "@/core/thread/utils";
+import { pathOfThread, titleOfThread } from "@/core/threads/utils";
 
 export function RecentChatList() {
   const router = useRouter();

frontend/src/core/api/hooks.ts

@@ -1,7 +1,7 @@
 import type { ThreadsClient } from "@langchain/langgraph-sdk/client";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 
-import type { MessageThread, MessageThreadState } from "../thread";
+import type { AgentThread, AgentThreadState } from "../threads";
 
 import { getLangGraphClient } from "./client";
 
@@ -13,12 +13,12 @@ export function useThreads(
   },
 ) {
   const langGraphClient = getLangGraphClient();
-  return useQuery<MessageThread[]>({
+  return useQuery<AgentThread[]>({
     queryKey: ["threads", "search", params],
     queryFn: async () => {
       const response =
-        await langGraphClient.threads.search<MessageThreadState>(params);
-      return response as MessageThread[];
+        await langGraphClient.threads.search<AgentThreadState>(params);
+      return response as AgentThread[];
     },
   });
 }
@@ -36,7 +36,7 @@ export function useDeleteThread() {
           queryKey: ["threads", "search"],
           exact: false,
         },
-        (oldData: Array<MessageThread>) => {
+        (oldData: Array<AgentThread>) => {
           return oldData.filter((t) => t.thread_id !== threadId);
         },
       );

frontend/src/core/thread/types.ts

@@ -1,8 +0,0 @@
-import { type BaseMessage } from "@langchain/core/messages";
-import type { Thread } from "@langchain/langgraph-sdk";
-
-export interface MessageThreadState extends Record<string, unknown> {
-  messages: BaseMessage[];
-}
-
-export interface MessageThread extends Thread<MessageThreadState> {}

frontend/src/core/threads/types.ts

@@ -0,0 +1,15 @@
+import { type BaseMessage } from "@langchain/core/messages";
+import type { Thread } from "@langchain/langgraph-sdk";
+
+export interface AgentThreadState extends Record<string, unknown> {
+  title: string;
+  messages: BaseMessage[];
+}
+
+export interface AgentThread extends Thread<AgentThreadState> {}
+
+export interface AgentThreadContext extends Record<string, unknown> {
+  thread_id: string;
+  model: string;
+  thinking_enabled: boolean;
+}

frontend/src/core/threads/utils.ts

@@ -1,8 +1,8 @@
 import type { BaseMessage } from "@langchain/core/messages";
 
-import type { MessageThread } from "./types";
+import type { AgentThread } from "./types";
 
-export function pathOfThread(thread: MessageThread, includeAssistantId = true) {
+export function pathOfThread(thread: AgentThread, includeAssistantId = true) {
   if (includeAssistantId) {
     return `/workspace/chats/${thread.thread_id}`;
   }
@@ -19,9 +19,9 @@ export function textOfMessage(message: BaseMessage) {
   return null;
 }
 
-export function titleOfThread(thread: MessageThread) {
+export function titleOfThread(thread: AgentThread) {
   if (thread.values && "title" in thread.values) {
-    return thread.values.title as string;
+    return thread.values.title;
   }
   return "Untitled";
 }