fix: 重置按钮放在头部，返回按钮的逻辑不变

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

@@ -368,7 +368,14 @@ export default function ChatPage() {
                     variant="ghost"
                     className="px-[10px] py-[5px] text-sm font-medium text-ws-base-1 hover:text-ws-base-1/80"
                     disabled={isStreaming}
-                    onClick={() => setShowExitDialog(true)}
+                    onClick={() => {
+                      sendToParent({
+                        type: POST_MESSAGE_TYPES.IS_CHATTING,
+                        isChatting: false,
+                      });
+                      router.replace(`/workspace/chats/${threadId}?is_chatting=false`)
+                    }
+                    }
                   >
                     <svg
                       width="20"
@@ -424,6 +431,20 @@ export default function ChatPage() {
                       </Button>
                     }
                   /> */}
+                  <Tooltip content={t.common.resetThread}>
+                    <Button
+                      size="sm"
+                      variant="ghost"
+                      className="h-full px-[10px] py-[5px] text-sm font-medium text-ws-base-1 hover:text-ws-base-1"
+                      disabled={isStreaming}
+                      onClick={() => setShowExitDialog(true)}
+                    >
+                      <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 18 18" fill="none">
+                        <path d="M2 4H6M16 4H12M6 4H12M6 4C6 2.89543 6.89543 2 8 2H10C11.1046 2 12 2.89543 12 4M4 6V14C4 15.1046 4.89543 16 6 16H12C13.1046 16 14 15.1046 14 14V6M7 8V13M11 8V13" stroke="#150033" stroke-linecap="round" />
+                      </svg>
+                      {t.common.resetThread}
+                    </Button>
+                  </Tooltip>
 
                   {artifacts?.length > 0 && !artifactsOpen && (
                     <Tooltip content={t.chatPage.viewArtifactsTooltip}>
@@ -436,7 +457,12 @@ export default function ChatPage() {
                           setSidebarOpen(false);
                         }}
                       >
-                        <FilesIcon />
+                        <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 18 18" fill="none">
+                          <path d="M16 7V4C16 2.89543 15.1046 2 14 2H4C2.89543 2 2 2.89543 2 4V14C2 15.1046 2.89543 16 4 16H9" stroke="#150033" stroke-linecap="round" />
+                          <path d="M5 5H9M5 8H7" stroke="#150033" stroke-linecap="round" stroke-linejoin="round" />
+                          <circle cx="11.5" cy="10.5" r="3" stroke="#150033" />
+                          <path d="M15.5 14.5L14 13" stroke="#150033" stroke-linecap="round" stroke-linejoin="round" />
+                        </svg>
                         {t.common.artifacts}
                       </Button>
                     </Tooltip>

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

@@ -965,14 +965,14 @@ export function InputBox({
                 />
               </div>
             )}
-            {!showWelcomeStyle && (
+            {/* {!showWelcomeStyle && (
               <div className="shrink-0 h-full">
                 <ExitChattingButton
                   router={router}
                   threadId={threadIdFromProps}
                 />
               </div>
-            )}
+            )} */}
             <div ref={attachmentsButtonTourRef} className="shrink-0 h-full">
               <AddAttachmentsButton />
             </div>

frontend/src/core/i18n/locales/en-US.ts

@@ -53,6 +53,7 @@ export const enUS: Translations = {
     exportSuccess: "Conversation exported",
     removeAttachment: "Remove attachment",
     reference: "Reference",
+    resetThread: "Reset thread",
   },
 
   // Welcome

frontend/src/core/i18n/locales/types.ts

@@ -48,6 +48,7 @@ export interface Translations {
     exportSuccess: string;
     removeAttachment: string;
     reference: string;
+    resetThread: string;
   };
 
   // Welcome

frontend/src/core/i18n/locales/zh-CN.ts

@@ -55,6 +55,7 @@ export const zhCN: Translations = {
     exportSuccess: "对话已导出",
     removeAttachment: "移除附件",
     reference: "引用",
+    resetThread: "重置会话",
   },
 
   // Welcome