feat(turbo): add direct LLM chat mode with runtime toggle

Add 极速 mode that streams via /api/direct-chat without the lead agent stack, plus VITE_TURBO_MODE_VISIBLE in runtime-config.js (default off). Also disable global memory, tighten Qwen/vLLM thinking control for flash mode, and force thinking off on the direct-chat endpoint. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-09-09 21:58:36 +08:00
1 parent 4f7f07504a
commit d765afe2ac
@@ -59,6 +59,9 @@
 # 简介模式左侧菜单类型：与菜单管理页「简介模式」的类型 A / B 对应。两套网页分别填 A 或 B。
 # 不填或留空时按类型 A，继续使用原来的简介菜单数据。
 # VITE_COMPACT_MENU_TYPE=A
+# 问答页「极速」模式：true=在模式菜单显示并直连大模型；false 或未设=隐藏。
+# 部署后优先改 dist/runtime-config.js 的 VITE_TURBO_MODE_VISIBLE，刷新即可。
+# VITE_TURBO_MODE_VISIBLE=false
 # VITE_GITHUB_OAUTH_TOKEN=

 # --- 官方 DeerFlow 风格页面入口（仅 Vite，不引入 Next.js）---
@@ -151,6 +151,11 @@ window.__CM_RUNTIME_CONFIG__ = {
  // GitHub OAuth Token；不使用 GitHub 相关能力时留空。
  VITE_GITHUB_OAUTH_TOKEN: "",

+  // 是否在问答输入框「模式」菜单显示「极速」："true" 显示，"false" 隐藏。
+  // 默认关闭。开启后可直连大模型流式问答，不走智能体工具与技能。
+  // 部署后改 dist/runtime-config.js 再刷新页面即可，无需重新打包。
+  VITE_TURBO_MODE_VISIBLE: "true",
+
  // 是否在智能体管理页显示「舆情分析」类型："true" 显示，"false" 隐藏。
  // 关闭后，该智能体的专用对话地址也会自动跳回智能体管理页。
  VITE_SENTIMENT_AGENT_VISIBLE: "true",
@@ -7,6 +7,7 @@ import {
  CheckIcon,
  FileTextIcon,
  FolderTreeIcon,
+  GaugeIcon,
  GraduationCapIcon,
  LightbulbIcon,
  PaperclipIcon,
@@ -68,6 +69,7 @@ import { isHiddenFromUIMessage } from "@/core/messages/utils";
 import { useModels } from "@/core/models/hooks";
 import type { Model } from "@/core/models/types";
 import type { AgentThreadContext } from "@/core/threads";
+import { isTurboModeVisible } from "@/core/threads/use-direct-chat";
 import { textOfMessage } from "@/core/threads/utils";
 import { desensitize } from "@/lib/desensitize";
 import { cn } from "@/lib/utils";
@@ -93,14 +95,14 @@ import {

 import { useRecommendedQuestions } from "@/core/recommended-questions/hooks";
 import { useUserPreferences } from "@/core/user-preferences";
-import {
-  isThreadRagModeLocked,
-  lockThreadRagMode,
-  useLocalSettings,
-} from "@/core/settings";
-import { useCitationDisplaySettings } from "@/core/system-settings/hooks";
-
-import { CustomPromptBar } from "./custom-prompt-menu";
+import {
+  isThreadRagModeLocked,
+  lockThreadRagMode,
+  useLocalSettings,
+} from "@/core/settings";
+import { useCitationDisplaySettings } from "@/core/system-settings/hooks";
+
+import { CustomPromptBar } from "./custom-prompt-menu";
 import { useThread } from "./messages/context";
 import { ModeHoverGuide } from "./mode-hover-guide";
 import { Tooltip } from "./tooltip";
@@ -223,16 +225,20 @@ export function InputBox({
    context.execution_profile === "single_round_rag";
  const multiRoundRagActive =
    context.execution_profile === "multi_round_rag";
+  const turboModeVisible = isTurboModeVisible();
+  const directChatActive =
+    turboModeVisible && context.execution_profile === "direct";
  const frontendRagActive = singleRoundRagActive || multiRoundRagActive;
+  const bypassAgentActive = frontendRagActive || directChatActive;
  const modelOptions = useMemo(() => {
    return singleRoundRagActive ? extraModels : models;
  }, [extraModels, models, singleRoundRagActive]);
-  const { thread, isMock } = useThread();
-  const { textInput } = usePromptInputController();
-  const promptRootRef = useRef<HTMLDivElement | null>(null);
-  const { data: citationDisplay } = useCitationDisplaySettings();
-  const referenceModeEntryEnabled =
-    citationDisplay?.reference_mode_enabled ?? false;
+  const { thread, isMock } = useThread();
+  const { textInput } = usePromptInputController();
+  const promptRootRef = useRef<HTMLDivElement | null>(null);
+  const { data: citationDisplay } = useCitationDisplaySettings();
+  const referenceModeEntryEnabled =
+    citationDisplay?.reference_mode_enabled ?? false;

  const [followups, setFollowups] = useState<string[]>([]);
  const [followupsHidden, setFollowupsHidden] = useState(false);
@@ -253,11 +259,37 @@ export function InputBox({
    recommendedQuestions.length > 0;

  useEffect(() => {
-    // Multi-round RAG is a frontend execution profile, not a model option.
-    // Do not let the normal model fallback clear it on every render.
+    // Frontend-only execution profiles are not model options.
+    // Do not let the normal model fallback clear them on every render.
+    if (!turboModeVisible && context.execution_profile === "direct") {
+      onContextChange?.({
+        ...context,
+        execution_profile: undefined,
+      });
+      return;
+    }
    if (multiRoundRagActive) {
      return;
    }
+    if (directChatActive) {
+      if (models.length === 0) {
+        return;
+      }
+      const currentModel = models.find((m) => m.name === context.model_name);
+      const fallbackModel = currentModel ?? models[0]!;
+      if (
+        context.model_name === fallbackModel.name &&
+        context.execution_profile === "direct"
+      ) {
+        return;
+      }
+      onContextChange?.({
+        ...context,
+        model_name: fallbackModel.name,
+        execution_profile: "direct",
+      });
+      return;
+    }
    if (modelOptions.length === 0) {
      return;
    }
@@ -281,7 +313,7 @@ export function InputBox({
      mode: nextMode,
      execution_profile: fallbackModel.execution_profile,
    });
-  }, [context, modelOptions, multiRoundRagActive, onContextChange]);
+  }, [context, directChatActive, modelOptions, models, multiRoundRagActive, onContextChange, turboModeVisible]);

  const selectedModel = useMemo(() => {
    if (modelOptions.length === 0) {
@@ -314,7 +346,10 @@ export function InputBox({
        model_name,
        mode: getResolvedMode(context.mode, model.supports_thinking ?? false),
        reasoning_effort: context.reasoning_effort,
-        execution_profile: model.execution_profile,
+        execution_profile:
+          context.execution_profile === "direct"
+            ? "direct"
+            : model.execution_profile,
      });
      setModelDialogOpen(false);
    },
@@ -346,6 +381,16 @@ export function InputBox({
    [onContextChange, context, models, supportThinking],
  );

+  const handleDirectChatSelect = useCallback(() => {
+    const ordinaryModel =
+      models.find((model) => model.name === context.model_name) ?? models[0];
+    onContextChange?.({
+      ...context,
+      model_name: ordinaryModel?.name ?? context.model_name,
+      execution_profile: "direct",
+    });
+  }, [context, models, onContextChange]);
+
  const handleSingleRoundRagSelect = useCallback(() => {
    const ragModel =
      extraModels.find((model) => model.name === context.model_name) ??
@@ -749,7 +794,7 @@ export function InputBox({
              />
            </PromptInputActionMenuContent>
          </PromptInputActionMenu> */}
-            {!frontendRagActive && (
+            {!bypassAgentActive && (
              <AddAttachmentsButton
                className={cn(
                  "rounded-full border-0 bg-transparent px-2.5! shadow-none text-muted-foreground hover:bg-muted/70 hover:text-foreground dark:text-slate-400 dark:hover:bg-slate-700/70 dark:hover:text-slate-100",
@@ -758,7 +803,7 @@ export function InputBox({
                )}
              />
            )}
-            {!frontendRagActive && !hideContextTools && <Tooltip
+            {!bypassAgentActive && !hideContextTools && <Tooltip
              content={
                context.writing_mode
                  ? "写作模式已开启：报告由深度研究管线按「通用分析结构」撰写，优先使用对话中已检索的资料"
@@ -784,7 +829,7 @@ export function InputBox({
                <span className="text-xs font-normal">写作</span>
              </PromptInputButton>
            </Tooltip>}
-            {!frontendRagActive && <Tooltip
+            {!bypassAgentActive && <Tooltip
              content={
                artifactDirectoryModeEnabled
                  ? "文件模式已开启：右侧会显示当前对话生成的全部文件目录"
@@ -813,7 +858,7 @@ export function InputBox({
                <span className="text-xs font-normal">文件</span>
              </PromptInputButton>
            </Tooltip>}
-            {!frontendRagActive && !hideContextTools && !hideMemoryTool && <Tooltip
+            {!bypassAgentActive && !hideContextTools && !hideMemoryTool && <Tooltip
              content={
                memoryInjectionEnabled
                  ? "记忆注入已开启：对话前会注入历史记忆"
@@ -839,9 +884,9 @@ export function InputBox({
                <span className="text-xs font-normal">记忆</span>
              </PromptInputButton>
            </Tooltip>}
-            {referenceModeEntryEnabled && !frontendRagActive && !hideContextTools && <Tooltip
-              content={
-                ragModeEnabled
+            {referenceModeEntryEnabled && !bypassAgentActive && !hideContextTools && <Tooltip
+              content={
+                ragModeEnabled
                  ? "参考文献模式已开启：检索类结果会按编号引用展示"
                  : "参考文献模式已关闭：点击开启"
              }
@@ -869,7 +914,7 @@ export function InputBox({
                <span className="text-xs font-normal">参考文献</span>
              </PromptInputButton>
            </Tooltip>}
-            {!frontendRagActive && <Tooltip
+            {!bypassAgentActive && <Tooltip
              content={
                contextCompressionEnabled
                  ? "上下文压缩已开启：超长对话会自动压缩历史以节省 token"
@@ -909,7 +954,9 @@ export function InputBox({
                    : "flash"
                }
                tooltipContent={
-                  singleRoundRagActive
+                  directChatActive
+                    ? `${t.inputBox.turboMode}：${t.inputBox.turboModeDescription}`
+                    : singleRoundRagActive
                    ? "单轮 RAG 问答：基于知识库检索生成答案，并展示参考资料"
                    : multiRoundRagActive
                      ? "多轮 RAG 问答：多次检索并展示检索过程与参考资料"
@@ -921,7 +968,9 @@ export function InputBox({
                    "gap-1.5! rounded-full border-0 bg-transparent px-3! text-muted-foreground shadow-none hover:bg-muted/70 hover:text-foreground dark:text-slate-400 dark:hover:bg-slate-700/70 dark:hover:text-slate-100",
                    compact && "rounded-lg border px-2.5! py-1! text-[11px] font-medium",
                    compact &&
-                      (frontendRagActive
+                      (directChatActive
+                        ? "border-sky-200 bg-sky-50/60 text-sky-700 hover:bg-sky-100 dark:border-sky-700 dark:bg-sky-950/40 dark:text-sky-200"
+                        : frontendRagActive
                        ? "border-emerald-200 bg-emerald-50/60 text-emerald-700 hover:bg-emerald-100 dark:border-emerald-700 dark:bg-emerald-950/40 dark:text-emerald-200"
                        : context.mode === "thinking"
                        ? "border-indigo-200 bg-indigo-50/60 text-indigo-700 hover:bg-indigo-100 dark:border-indigo-700 dark:bg-indigo-950/40 dark:text-indigo-200"
@@ -933,7 +982,9 @@ export function InputBox({
                  )}
                  >
                    <div>
-                    {frontendRagActive ? (
+                    {directChatActive ? (
+                      <GaugeIcon className="size-3" />
+                    ) : frontendRagActive ? (
                      <BookMarkedIcon className="size-3" />
                    ) : context.mode === "flash" ? (
                      <ZapIcon className="size-3" />
@@ -948,10 +999,14 @@ export function InputBox({
                  <div
                    className={cn(
                      "text-xs font-normal",
-                      context.mode === "ultra" ? "golden-text" : "",
+                      context.mode === "ultra" && !directChatActive && !frontendRagActive
+                        ? "golden-text"
+                        : "",
                    )}
                  >
-                    {frontendRagActive
+                    {directChatActive
+                      ? t.inputBox.turboMode
+                      : frontendRagActive
                      ? multiRoundRagActive
                        ? "多轮 RAG"
                        : "单轮 RAG"
@@ -969,9 +1024,39 @@ export function InputBox({
                    {t.inputBox.mode}
                  </DropdownMenuLabel>
                  <PromptInputActionMenu>
+                    {turboModeVisible && (
                    <PromptInputActionMenuItem
                      className={cn(
-                        !frontendRagActive && context.mode === "flash"
+                        directChatActive
+                          ? "bg-sky-50 text-sky-800 hover:bg-sky-100 focus:bg-sky-100 dark:bg-sky-950/40 dark:text-sky-200 dark:hover:bg-sky-950/60 dark:focus:bg-sky-950/60"
+                          : "text-muted-foreground/65",
+                      )}
+                      onSelect={handleDirectChatSelect}
+                    >
+                      <div className="flex flex-col gap-2">
+                        <div className="flex items-center gap-1 font-bold">
+                          <GaugeIcon
+                            className={cn(
+                              "mr-2 size-4",
+                              directChatActive && "text-sky-700 dark:text-sky-200",
+                            )}
+                          />
+                          {t.inputBox.turboMode}
+                        </div>
+                        <div className="pl-7 text-xs">
+                          {t.inputBox.turboModeDescription}
+                        </div>
+                      </div>
+                      {directChatActive ? (
+                        <CheckIcon className="ml-auto size-4" />
+                      ) : (
+                        <div className="ml-auto size-4" />
+                      )}
+                    </PromptInputActionMenuItem>
+                    )}
+                    <PromptInputActionMenuItem
+                      className={cn(
+                        !bypassAgentActive && context.mode === "flash"
                          ? "text-accent-foreground"
                          : "text-muted-foreground/65",
                      )}
@@ -982,7 +1067,7 @@ export function InputBox({
                          <ZapIcon
                            className={cn(
                              "mr-2 size-4",
-                              !frontendRagActive && context.mode === "flash" &&
+                              !bypassAgentActive && context.mode === "flash" &&
                                "text-accent-foreground",
                            )}
                          />
@@ -992,7 +1077,7 @@ export function InputBox({
                          {t.inputBox.flashModeDescription}
                        </div>
                      </div>
-                      {!frontendRagActive && context.mode === "flash" ? (
+                      {!bypassAgentActive && context.mode === "flash" ? (
                        <CheckIcon className="ml-auto size-4" />
                      ) : (
                        <div className="ml-auto size-4" />
@@ -1001,7 +1086,7 @@ export function InputBox({
                    {supportThinking && (
                      <PromptInputActionMenuItem
                        className={cn(
-                          !frontendRagActive && context.mode === "thinking"
+                          !bypassAgentActive && context.mode === "thinking"
                            ? "text-accent-foreground"
                            : "text-muted-foreground/65",
                        )}
@@ -1012,7 +1097,7 @@ export function InputBox({
                            <LightbulbIcon
                              className={cn(
                                "mr-2 size-4",
-                                !frontendRagActive && context.mode === "thinking" &&
+                                !bypassAgentActive && context.mode === "thinking" &&
                                  "text-accent-foreground",
                              )}
                            />
@@ -1022,7 +1107,7 @@ export function InputBox({
                            {t.inputBox.reasoningModeDescription}
                          </div>
                        </div>
-                        {!frontendRagActive && context.mode === "thinking" ? (
+                        {!bypassAgentActive && context.mode === "thinking" ? (
                          <CheckIcon className="ml-auto size-4" />
                        ) : (
                          <div className="ml-auto size-4" />
@@ -1031,7 +1116,7 @@ export function InputBox({
                    )}
                    <PromptInputActionMenuItem
                      className={cn(
-                        !frontendRagActive && context.mode === "pro"
+                        !bypassAgentActive && context.mode === "pro"
                          ? "text-accent-foreground"
                          : "text-muted-foreground/65",
                      )}
@@ -1042,7 +1127,7 @@ export function InputBox({
                          <GraduationCapIcon
                            className={cn(
                              "mr-2 size-4",
-                              !frontendRagActive && context.mode === "pro" &&
+                              !bypassAgentActive && context.mode === "pro" &&
                                "text-accent-foreground",
                            )}
                          />
@@ -1052,7 +1137,7 @@ export function InputBox({
                          {t.inputBox.proModeDescription}
                        </div>
                      </div>
-                      {!frontendRagActive && context.mode === "pro" ? (
+                      {!bypassAgentActive && context.mode === "pro" ? (
                        <CheckIcon className="ml-auto size-4" />
                      ) : (
                        <div className="ml-auto size-4" />
@@ -1060,7 +1145,7 @@ export function InputBox({
                    </PromptInputActionMenuItem>
                    <PromptInputActionMenuItem
                      className={cn(
-                        !frontendRagActive && context.mode === "ultra"
+                        !bypassAgentActive && context.mode === "ultra"
                          ? "text-accent-foreground"
                          : "text-muted-foreground/65",
                      )}
@@ -1071,14 +1156,14 @@ export function InputBox({
                          <RocketIcon
                            className={cn(
                              "mr-2 size-4",
-                              !frontendRagActive &&
+                              !bypassAgentActive &&
                                context.mode === "ultra" &&
                                "text-[#dabb5e]",
                            )}
                          />
                          <div
                            className={cn(
-                              !frontendRagActive &&
+                              !bypassAgentActive &&
                                context.mode === "ultra" &&
                                "golden-text",
                            )}
@@ -1090,7 +1175,7 @@ export function InputBox({
                          {t.inputBox.ultraModeDescription}
                        </div>
                      </div>
-                      {!frontendRagActive && context.mode === "ultra" ? (
+                      {!bypassAgentActive && context.mode === "ultra" ? (
                        <CheckIcon className="ml-auto size-4" />
                      ) : (
                        <div className="ml-auto size-4" />
@@ -1161,7 +1246,7 @@ export function InputBox({
                </DropdownMenuGroup>
              </PromptInputActionMenuContent>
            </PromptInputActionMenu>
-            {!frontendRagActive && supportReasoningEffort && context.mode !== "flash" && (
+            {!bypassAgentActive && supportReasoningEffort && context.mode !== "flash" && (
              <PromptInputActionMenu>
                <PromptInputActionMenuTrigger className={cn("gap-1.5! rounded-full border-0 bg-transparent px-3! text-muted-foreground shadow-none hover:bg-muted/70 hover:text-foreground dark:text-slate-400 dark:hover:bg-slate-700/70 dark:hover:text-slate-100", compact && "rounded-lg border border-border px-2.5! py-1! text-[13px]")}>
                  <div className="text-xs font-normal">
@@ -1279,7 +1364,7 @@ export function InputBox({
            )}
          </PromptInputTools>
          <PromptInputTools className={cn("gap-1.5", compact && "gap-2")}>
-            {!frontendRagActive && agentSelector && (
+            {!bypassAgentActive && agentSelector && (
              <AgentSelector
                selectedAgentId={agentSelector.selectedAgentId}
                onAgentChange={agentSelector.onAgentChange}
@@ -1287,8 +1372,8 @@ export function InputBox({
                compact={compact}
              />
            )}
-            {!frontendRagActive && knowledgeSelector}
-            {!frontendRagActive && promptPrefix && (
+            {!bypassAgentActive && knowledgeSelector}
+            {!bypassAgentActive && promptPrefix && (
              <Tooltip
                content={
                  promptPrefix.on
@@ -96,6 +96,9 @@ export const enUS: Translations = {
    mode: "Mode",
    flashMode: "Flash",
    flashModeDescription: "Fast and efficient, but may not be accurate",
+    turboMode: "Turbo",
+    turboModeDescription:
+      "Talk to the model directly with no agent tools or skills, for lower first-token latency",
    reasoningMode: "Reasoning",
    reasoningModeDescription:
      "Reasoning before action, balance between time and accuracy",
@@ -448,17 +451,17 @@ export const enUS: Translations = {
      system: "System",
      light: "Light",
      dark: "Dark",
-      lightblue: "Light Blue",
-      lightgreen: "Green",
-      iceblue: "Glacier Blue",
-      lightyellow: "Pale Yellow",
+      lightblue: "Light Blue",
+      lightgreen: "Green",
+      iceblue: "Glacier Blue",
+      lightyellow: "Pale Yellow",
      systemDescription: "Match the operating system preference automatically.",
      lightDescription: "Bright palette with higher contrast for daytime.",
      darkDescription: "Dim palette that reduces glare for focus.",
-      lightblueDescription: "A crisp light palette built around blue.",
-      lightgreenDescription: "A crisp light palette built around fresh green tones.",
-      iceblueDescription: "An airy palette built around #9BCEF1 with accessible blue actions.",
-      lightyellowDescription: "A soft palette built around #F3FBD9 with readable olive actions.",
+      lightblueDescription: "A crisp light palette built around blue.",
+      lightgreenDescription: "A crisp light palette built around fresh green tones.",
+      iceblueDescription: "An airy palette built around #9BCEF1 with accessible blue actions.",
+      lightyellowDescription: "A soft palette built around #F3FBD9 with readable olive actions.",
      languageTitle: "Language",
      languageDescription: "Switch between languages.",
    },
@@ -545,13 +548,13 @@ export const enUS: Translations = {
      filesSaveAction: "Save",
      filesCancelEditAction: "Cancel",
      filesDownloadAction: "Download",
-      filesCopyPathAction: "Copy path",
-      filesDiscardConfirm: "Discard unsaved changes?",
-      filesSaveSuccess: "File saved",
-      filesDeleteAction: "Delete",
-      filesDeleteConfirm: "Delete \"{path}\"? This cannot be undone.",
-      filesDeleteSuccess: "File deleted",
-      filesReadOnlyHint: "Only administrators can edit or delete built-in skill files.",
+      filesCopyPathAction: "Copy path",
+      filesDiscardConfirm: "Discard unsaved changes?",
+      filesSaveSuccess: "File saved",
+      filesDeleteAction: "Delete",
+      filesDeleteConfirm: "Delete \"{path}\"? This cannot be undone.",
+      filesDeleteSuccess: "File deleted",
+      filesReadOnlyHint: "Only administrators can edit or delete built-in skill files.",
      viewDetailAction: "View skill details",
      stateSheet: {
        archivedTitle: "Archived skills",
@@ -591,26 +594,26 @@ export const enUS: Translations = {
        chooseFile: "Choose file",
        validating: "Validating archive…",
        installing: "Installing…",
-        replace: "Upload again and replace",
+        replace: "Upload again and replace",
        install: "Install",
        cancel: "Cancel",
        nameLabel: "Name",
        descriptionLabel: "Description",
        licenseLabel: "License",
        toolsLabel: "Allowed tools",
-        warningsLabel: "Warnings",
-        conflictOwnedByMe:
-          "You already uploaded a skill named '{name}'. You may upload it again and replace your existing copy (its enabled state will be kept).",
-        conflictOwnedByMeWrongTarget:
-          "The custom skill '{name}' belongs to you. Switch the target to 'Custom skill' to replace it.",
-        conflictOwnedByOther:
-          "Skill '{name}' was uploaded by user '{owner}' and cannot be replaced. Rename the skill before uploading.",
-        conflictCustom:
-          "A custom skill named '{name}' already exists, but its uploader could not be identified. Rename it to avoid overwriting someone else's skill.",
+        warningsLabel: "Warnings",
+        conflictOwnedByMe:
+          "You already uploaded a skill named '{name}'. You may upload it again and replace your existing copy (its enabled state will be kept).",
+        conflictOwnedByMeWrongTarget:
+          "The custom skill '{name}' belongs to you. Switch the target to 'Custom skill' to replace it.",
+        conflictOwnedByOther:
+          "Skill '{name}' was uploaded by user '{owner}' and cannot be replaced. Rename the skill before uploading.",
+        conflictCustom:
+          "A custom skill named '{name}' already exists, but its uploader could not be identified. Rename it to avoid overwriting someone else's skill.",
        conflictPublic:
          "A built-in public skill named '{name}' already exists and cannot be overwritten.",
-        conflictPublicAdminHint:
-          "A built-in public skill named '{name}' exists. Click 'Upload again and replace' to overwrite it.",
+        conflictPublicAdminHint:
+          "A built-in public skill named '{name}' exists. Click 'Upload again and replace' to overwrite it.",
        installSuccess: "Skill '{name}' installed.",
        installSuccessReplaced: "Skill '{name}' replaced.",
        rejectInvalidExt: "Only .zip or .skill files are accepted.",
@@ -91,6 +91,8 @@ export interface Translations {
    mode: string;
    flashMode: string;
    flashModeDescription: string;
+    turboMode: string;
+    turboModeDescription: string;
    reasoningMode: string;
    reasoningModeDescription: string;
    proMode: string;
@@ -383,17 +385,17 @@ export interface Translations {
      system: string;
      light: string;
      dark: string;
-      lightblue: string;
-      lightgreen: string;
-      iceblue: string;
-      lightyellow: string;
+      lightblue: string;
+      lightgreen: string;
+      iceblue: string;
+      lightyellow: string;
      systemDescription: string;
      lightDescription: string;
      darkDescription: string;
-      lightblueDescription: string;
-      lightgreenDescription: string;
-      iceblueDescription: string;
-      lightyellowDescription: string;
+      lightblueDescription: string;
+      lightgreenDescription: string;
+      iceblueDescription: string;
+      lightyellowDescription: string;
      languageTitle: string;
      languageDescription: string;
    };
@@ -475,13 +477,13 @@ export interface Translations {
      filesSaveAction: string;
      filesCancelEditAction: string;
      filesDownloadAction: string;
-      filesCopyPathAction: string;
-      filesDiscardConfirm: string;
-      filesSaveSuccess: string;
-      filesDeleteAction: string;
-      filesDeleteConfirm: string;
-      filesDeleteSuccess: string;
-      filesReadOnlyHint: string;
+      filesCopyPathAction: string;
+      filesDiscardConfirm: string;
+      filesSaveSuccess: string;
+      filesDeleteAction: string;
+      filesDeleteConfirm: string;
+      filesDeleteSuccess: string;
+      filesReadOnlyHint: string;
      viewDetailAction: string;
      stateSheet: {
        archivedTitle: string;
@@ -525,12 +527,12 @@ export interface Translations {
        nameLabel: string;
        descriptionLabel: string;
        licenseLabel: string;
-        toolsLabel: string;
-        warningsLabel: string;
-        conflictOwnedByMe: string;
-        conflictOwnedByMeWrongTarget: string;
-        conflictOwnedByOther: string;
-        conflictCustom: string;
+        toolsLabel: string;
+        warningsLabel: string;
+        conflictOwnedByMe: string;
+        conflictOwnedByMeWrongTarget: string;
+        conflictOwnedByOther: string;
+        conflictCustom: string;
        conflictPublic: string;
        conflictPublicAdminHint: string;
        installSuccess: string;
@@ -95,6 +95,8 @@ export const zhCN: Translations = {
    mode: "模式",
    flashMode: "快速",
    flashModeDescription: "快速且高效的完成任务，但可能不够精准",
+    turboMode: "极速",
+    turboModeDescription: "直连大模型流式问答，不走智能体工具与技能，首字更快",
    reasoningMode: "思考",
    reasoningModeDescription: "思考后再行动，在时间与准确性之间取得平衡",
    proMode: "专业问答",
@@ -429,17 +431,17 @@ export const zhCN: Translations = {
      system: "系统",
      light: "浅色",
      dark: "深色",
-      lightblue: "浅蓝",
-      lightgreen: "绿色",
-      iceblue: "冰川蓝",
-      lightyellow: "浅黄色",
+      lightblue: "浅蓝",
+      lightgreen: "绿色",
+      iceblue: "冰川蓝",
+      lightyellow: "浅黄色",
      systemDescription: "自动跟随系统主题。",
      lightDescription: "更明亮的配色，适合日间使用。",
      darkDescription: "更暗的配色，减少眩光方便专注。",
-      lightblueDescription: "以蓝色为主色的清爽浅色配色。",
-      lightgreenDescription: "采用清新绿色的浅色配色。",
-      iceblueDescription: "以 #9BCEF1 为主色，搭配冰蓝留白与沉稳交互色。",
-      lightyellowDescription: "以 #F3FBD9 为主色，搭配柔和浅黄留白与深橄榄交互色。",
+      lightblueDescription: "以蓝色为主色的清爽浅色配色。",
+      lightgreenDescription: "采用清新绿色的浅色配色。",
+      iceblueDescription: "以 #9BCEF1 为主色，搭配冰蓝留白与沉稳交互色。",
+      lightyellowDescription: "以 #F3FBD9 为主色，搭配柔和浅黄留白与深橄榄交互色。",
      languageTitle: "语言",
      languageDescription: "在不同语言之间切换。",
    },
@@ -524,11 +526,11 @@ export const zhCN: Translations = {
      filesDownloadAction: "下载",
      filesCopyPathAction: "复制路径",
      filesDiscardConfirm: "有未保存的修改,确定放弃吗?",
-      filesSaveSuccess: "文件已保存",
-      filesDeleteAction: "删除",
-      filesDeleteConfirm: "确定删除“{path}”？该操作不可撤销。",
-      filesDeleteSuccess: "文件已删除",
-      filesReadOnlyHint: "仅管理员可以编辑或删除内置技能文件。",
+      filesSaveSuccess: "文件已保存",
+      filesDeleteAction: "删除",
+      filesDeleteConfirm: "确定删除“{path}”？该操作不可撤销。",
+      filesDeleteSuccess: "文件已删除",
+      filesReadOnlyHint: "仅管理员可以编辑或删除内置技能文件。",
      viewDetailAction: "查看技能详情",
      stateSheet: {
        archivedTitle: "归档的技能",
@@ -566,24 +568,24 @@ export const zhCN: Translations = {
        chooseFile: "选择文件",
        validating: "正在校验文件…",
        installing: "安装中…",
-        replace: "重复上传并覆盖",
+        replace: "重复上传并覆盖",
        install: "安装",
        cancel: "取消",
        nameLabel: "名称",
        descriptionLabel: "描述",
        licenseLabel: "许可证",
        toolsLabel: "允许的工具",
-        warningsLabel: "警告",
-        conflictOwnedByMe:
-          "您已上传过同名技能 “{name}”，可重复上传并覆盖原版本（原启用状态保留）。",
-        conflictOwnedByMeWrongTarget:
-          "同名技能 “{name}” 是您上传的自定义技能，请切换到「自定义技能」后覆盖。",
-        conflictOwnedByOther:
-          "技能 “{name}” 已由用户 “{owner}” 上传，不能覆盖，请修改技能名称后再上传。",
-        conflictCustom:
-          "已存在同名自定义技能 “{name}”，但无法确认上传用户，为避免误覆盖请修改技能名称。",
+        warningsLabel: "警告",
+        conflictOwnedByMe:
+          "您已上传过同名技能 “{name}”，可重复上传并覆盖原版本（原启用状态保留）。",
+        conflictOwnedByMeWrongTarget:
+          "同名技能 “{name}” 是您上传的自定义技能，请切换到「自定义技能」后覆盖。",
+        conflictOwnedByOther:
+          "技能 “{name}” 已由用户 “{owner}” 上传，不能覆盖，请修改技能名称后再上传。",
+        conflictCustom:
+          "已存在同名自定义技能 “{name}”，但无法确认上传用户，为避免误覆盖请修改技能名称。",
        conflictPublic: `存在同名内置技能 '{name}'，无法覆盖。`,
-        conflictPublicAdminHint: `存在同名内置技能 '{name}'。点击「重复上传并覆盖」可替换。`,
+        conflictPublicAdminHint: `存在同名内置技能 '{name}'。点击「重复上传并覆盖」可替换。`,
        installSuccess: `技能 '{name}' 已安装。`,
        installSuccessReplaced: `技能 '{name}' 已替换。`,
        rejectInvalidExt: `只接受 .zip 或 .skill 文件。`,
@@ -4,11 +4,11 @@ export interface Model {
  model: string;
  display_name: string;
  description?: string | null;
-  supports_thinking?: boolean;
-  supports_reasoning_effort?: boolean;
-  /** Execution profiles handled by the frontend instead of DeerFlow. */
-  execution_profile?: "single_round_rag" | "multi_round_rag";
-}
+  supports_thinking?: boolean;
+  supports_reasoning_effort?: boolean;
+  /** Execution profiles handled by the frontend instead of DeerFlow. */
+  execution_profile?: "single_round_rag" | "multi_round_rag" | "direct";
+}

 export interface TokenUsageSettings {
  enabled: boolean;
@@ -16,14 +16,14 @@ import { rememberAskTime } from "../chat-timestamps";
 import { getBackendBaseURL, getLangGraphBaseURL } from "../config";
 import { useI18n } from "../i18n/hooks";
 import { OptType, writeYLog } from "../log/y-log";
-import type { FileInMessage } from "../messages/utils";
-import type { LocalSettings } from "../settings";
-import {
-  isThreadRagModeLocked,
-  lockThreadRagMode,
-  useLocalSettings,
-} from "../settings";
-import { useCitationDisplaySettings } from "../system-settings/hooks";
+import type { FileInMessage } from "../messages/utils";
+import type { LocalSettings } from "../settings";
+import {
+  isThreadRagModeLocked,
+  lockThreadRagMode,
+  useLocalSettings,
+} from "../settings";
+import { useCitationDisplaySettings } from "../system-settings/hooks";
 import { useUpdateSubtask } from "../tasks/context";
 import type { UploadedFileInfo } from "../uploads";
 import { promptInputFilePartToFile, uploadFiles } from "../uploads";
@@ -571,11 +571,11 @@ export function useThreadStream({
  onToolStart,
  onToolEnd,
 }: ThreadStreamOptions) {
-  const { t } = useI18n();
-  const [localSettings] = useLocalSettings();
-  const { data: citationDisplay } = useCitationDisplaySettings();
-  const referenceModeEntryEnabled =
-    citationDisplay?.reference_mode_enabled ?? false;
+  const { t } = useI18n();
+  const [localSettings] = useLocalSettings();
+  const { data: citationDisplay } = useCitationDisplaySettings();
+  const referenceModeEntryEnabled =
+    citationDisplay?.reference_mode_enabled ?? false;
  // Track the thread ID that is currently streaming to handle thread changes during streaming
  const [onStreamThreadId, setOnStreamThreadId] = useState(() => threadId);
  // Ref to track current thread ID across async callbacks without causing re-renders,
@@ -1507,21 +1507,21 @@ export function useThreadStream({
          ...context,
          ...extraContext,
        };
-        const selectedLlmWikiIds = Array.isArray(
-          mergedContext.llmwiki_knowledge_base_ids,
-        )
-          ? mergedContext.llmwiki_knowledge_base_ids
-          : [];
-        const selectedAssistantKnowledgeIds = Array.isArray(
-          mergedContext.assistant_knowledge_base_ids,
-        )
-          ? mergedContext.assistant_knowledge_base_ids
-          : [];
-        const ragModeEnabled =
-          (referenceModeEntryEnabled && localSettings.display.ragModeEnabled) ||
-          isThreadRagModeLocked(threadId) ||
-          selectedLlmWikiIds.length > 0 ||
-          selectedAssistantKnowledgeIds.length > 0;
+        const selectedLlmWikiIds = Array.isArray(
+          mergedContext.llmwiki_knowledge_base_ids,
+        )
+          ? mergedContext.llmwiki_knowledge_base_ids
+          : [];
+        const selectedAssistantKnowledgeIds = Array.isArray(
+          mergedContext.assistant_knowledge_base_ids,
+        )
+          ? mergedContext.assistant_knowledge_base_ids
+          : [];
+        const ragModeEnabled =
+          (referenceModeEntryEnabled && localSettings.display.ragModeEnabled) ||
+          isThreadRagModeLocked(threadId) ||
+          selectedLlmWikiIds.length > 0 ||
+          selectedAssistantKnowledgeIds.length > 0;
        if (ragModeEnabled) {
          lockThreadRagMode(threadId);
        }
@@ -1579,6 +1579,7 @@ export function useThreadStream({
            context: {
              ...mergedContext,
              thinking_enabled: mergedContext.mode !== "flash",
+              thinking_force_disabled: mergedContext.mode === "flash",
              is_plan_mode:
                mergedContext.mode === "pro" || mergedContext.mode === "ultra",
              subagent_enabled: mergedContext.mode === "ultra",
@@ -1639,18 +1640,18 @@ export function useThreadStream({
        sendInFlightRef.current = false;
      }
    },
-    [
-      thread,
-      _handleOnStart,
-      t.uploads.uploadingFiles,
-      context,
-      referenceModeEntryEnabled,
-      localSettings.display.ragModeEnabled,
-      queryClient,
-      runOptions,
-      confirmOrRejoin,
-    ],
-  );
+    [
+      thread,
+      _handleOnStart,
+      t.uploads.uploadingFiles,
+      context,
+      referenceModeEntryEnabled,
+      localSettings.display.ragModeEnabled,
+      queryClient,
+      runOptions,
+      confirmOrRejoin,
+    ],
+  );

  const handleThreadStop = useCallback(async () => {
    const tid = threadIdRef.current;
@@ -1699,7 +1700,7 @@ export function useThreadStream({
      ? undefined
      : thread.error;

-  const mergedThread = {
+  const mergedThread = {
    ...thread,
    error: visibleThreadError,
    values: mergedValues,
@@ -1709,7 +1710,7 @@ export function useThreadStream({
        : mergedMessages,
    isLoading: thread.isLoading || streamHoldOpen,
    stop: handleThreadStop,
-  } as typeof thread;
+  } as typeof thread;

  // 第 4 个返回值 `onStreamThreadId` = 底层 useStream 当前实际绑定的线程 id（新建/未保存时为 null）。
  // 调用方据此判断「流是否已切到全新线程」，避免在切换会话的那一帧把消息发进上一个会话
@@ -2,18 +2,20 @@ import type { Message, Thread } from "@langchain/langgraph-sdk";

 import type { Todo } from "../todos";

-export interface AgentThreadState extends Record<string, unknown> {
-  title: string;
-  title_provisional?: boolean;
-  messages: Message[];
-  artifacts: string[];
-  todos?: Todo[];
-}
+export interface AgentThreadState extends Record<string, unknown> {
+  title: string;
+  title_provisional?: boolean;
+  messages: Message[];
+  artifacts: string[];
+  todos?: Todo[];
+}

 export interface AgentThreadContext extends Record<string, unknown> {
  thread_id: string;
  model_name: string | undefined;
  thinking_enabled: boolean;
+  /** Flash mode: force vLLM/Qwen ``enable_thinking=false`` even without a per-model disable shape. */
+  thinking_force_disabled?: boolean;
  is_plan_mode: boolean;
  subagent_enabled: boolean;
  reasoning_effort?: "minimal" | "low" | "medium" | "high";
@@ -23,15 +25,15 @@ export interface AgentThreadContext extends Record<string, unknown> {
  rag_mode_enabled?: boolean;
  /** Per-request switch for context compression (上下文压缩). Default off. */
  summarization_enabled?: boolean;
-  /** Per-conversation switch for knowledge-base RAG injection (phase 2). */
-  knowledge_rag_enabled?: boolean;
-  /** DeerFlow LLMWiki mapping ids selected for this conversation. */
-  llmwiki_knowledge_base_ids?: string[];
-  /** Assistant knowledge-base ids selected for this conversation. */
-  assistant_knowledge_base_ids?: string[];
-  /** Direct RAG modes handled in the frontend; these requests never enter Lead Agent. */
-  execution_profile?: "single_round_rag" | "multi_round_rag";
-  agent_id?: string;
+  /** Per-conversation switch for knowledge-base RAG injection (phase 2). */
+  knowledge_rag_enabled?: boolean;
+  /** DeerFlow LLMWiki mapping ids selected for this conversation. */
+  llmwiki_knowledge_base_ids?: string[];
+  /** Assistant knowledge-base ids selected for this conversation. */
+  assistant_knowledge_base_ids?: string[];
+  /** Frontend-only execution paths that never enter Lead Agent (RAG / 极速直连). */
+  execution_profile?: "single_round_rag" | "multi_round_rag" | "direct";
+  agent_id?: string;
  /** @deprecated kept for reading legacy thread metadata; prefer agent_id */
  agent_name?: string;
 }
@@ -0,0 +1,312 @@
+import type { Message } from "@langchain/langgraph-sdk";
+import { useCallback, useEffect, useRef, useState } from "react";
+
+import { apiFetch } from "@/core/api/fetch-client";
+import { getBackendBaseURL } from "@/core/config";
+import { readRuntimeFlag } from "@/env";
+import { createClientId } from "@/lib/client-id";
+
+import { textOfMessage } from "./utils";
+
+const STORAGE_PREFIX = "workspace.direct-chat.";
+const MAX_HISTORY_MESSAGES = 20;
+
+export function isDirectChatProfile(context: unknown): boolean {
+  return (
+    typeof context === "object" &&
+    context !== null &&
+    (context as { execution_profile?: unknown }).execution_profile === "direct"
+  );
+}
+
+/** 是否在模式菜单展示「极速」。仅 runtime-config.js 显式为 "true" 时开启，默认关闭。 */
+export function isTurboModeVisible(): boolean {
+  return readRuntimeFlag("VITE_TURBO_MODE_VISIBLE");
+}
+
+function storageKey(threadId: string) {
+  return `${STORAGE_PREFIX}${threadId}`;
+}
+
+function readStoredMessages(threadId: string): Message[] {
+  if (typeof window === "undefined" || !threadId) return [];
+  try {
+    const raw = window.sessionStorage.getItem(storageKey(threadId));
+    const parsed: unknown = raw ? JSON.parse(raw) : [];
+    return Array.isArray(parsed) ? (parsed as Message[]) : [];
+  } catch {
+    return [];
+  }
+}
+
+function writeStoredMessages(threadId: string, messages: Message[]) {
+  if (typeof window === "undefined" || !threadId) return;
+  try {
+    window.sessionStorage.setItem(storageKey(threadId), JSON.stringify(messages));
+  } catch {
+    // Quota errors must never interrupt an already-running answer.
+  }
+}
+
+function isAbortError(error: unknown): boolean {
+  return error instanceof DOMException
+    ? error.name === "AbortError"
+    : error instanceof Error && error.name === "AbortError";
+}
+
+function historyFromMessages(messages: Message[]): Array<{
+  role: "user" | "assistant";
+  content: string;
+}> {
+  const history: Array<{ role: "user" | "assistant"; content: string }> = [];
+  for (const message of messages) {
+    if (message.type !== "human" && message.type !== "ai") continue;
+    const content = textOfMessage(message)?.trim();
+    if (!content) continue;
+    history.push({
+      role: message.type === "human" ? "user" : "assistant",
+      content,
+    });
+  }
+  return history.slice(-MAX_HISTORY_MESSAGES);
+}
+
+function parseSseBlocks(buffer: string): {
+  events: Array<{ event?: string; data: string }>;
+  rest: string;
+} {
+  const parts = buffer.split("\n\n");
+  const rest = parts.pop() ?? "";
+  const events: Array<{ event?: string; data: string }> = [];
+  for (const part of parts) {
+    let event: string | undefined;
+    const dataLines: string[] = [];
+    for (const line of part.split("\n")) {
+      if (line.startsWith(":")) continue;
+      if (line.startsWith("event:")) event = line.slice(6).trim();
+      else if (line.startsWith("data:")) dataLines.push(line.slice(5).trimStart());
+    }
+    if (dataLines.length > 0) {
+      events.push({ event, data: dataLines.join("\n") });
+    }
+  }
+  return { events, rest };
+}
+
+async function readErrorDetail(response: Response): Promise<string> {
+  try {
+    const payload: unknown = await response.json();
+    if (
+      payload &&
+      typeof payload === "object" &&
+      "detail" in payload &&
+      typeof (payload as { detail: unknown }).detail === "string"
+    ) {
+      return (payload as { detail: string }).detail;
+    }
+  } catch {
+    // Fall through to status text.
+  }
+  return `极速问答失败（${response.status}）`;
+}
+
+/**
+ * Frontend-only adapter that talks to Gateway ``POST /api/direct-chat/stream``.
+ * It never submits a LangGraph run or touches the lead-agent stack.
+ */
+export function useDirectChatMessages(threadId: string | undefined) {
+  const [messages, setMessages] = useState<Message[]>(() =>
+    readStoredMessages(threadId ?? ""),
+  );
+  const messagesRef = useRef(messages);
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const controllerRef = useRef<AbortController | null>(null);
+
+  useEffect(() => {
+    const stored = readStoredMessages(threadId ?? "");
+    messagesRef.current = stored;
+    setMessages(stored);
+    setError(null);
+  }, [threadId]);
+
+  useEffect(() => {
+    messagesRef.current = messages;
+  }, [messages]);
+
+  useEffect(() => () => controllerRef.current?.abort(), []);
+
+  const updateMessages = useCallback(
+    (targetThreadId: string, updater: (current: Message[]) => Message[]) => {
+      setMessages((current) => {
+        const next = updater(current);
+        messagesRef.current = next;
+        writeStoredMessages(targetThreadId, next);
+        return next;
+      });
+    },
+    [],
+  );
+
+  const stop = useCallback(() => controllerRef.current?.abort(), []);
+
+  const submit = useCallback(
+    async ({
+      targetThreadId,
+      query,
+      modelName,
+    }: {
+      targetThreadId: string;
+      query: string;
+      modelName?: string;
+    }) => {
+      if (isLoading) return;
+      const question = query.trim();
+      if (!question) return;
+
+      const humanId = createClientId("direct-human");
+      const assistantId = createClientId("direct-ai");
+      const clientTs = new Date().toISOString();
+      const history = historyFromMessages(messagesRef.current);
+      const userMessage: Message = {
+        id: humanId,
+        type: "human",
+        content: [{ type: "text", text: question }],
+        additional_kwargs: { client_ts: clientTs, direct_chat: true },
+      };
+      const initialAssistant: Message = {
+        id: assistantId,
+        type: "ai",
+        content: "",
+        additional_kwargs: { direct_chat: true },
+      };
+      updateMessages(targetThreadId, (current) => [
+        ...current,
+        userMessage,
+        initialAssistant,
+      ]);
+      setError(null);
+      setIsLoading(true);
+
+      const controller = new AbortController();
+      controllerRef.current = controller;
+      let answer = "";
+
+      const refreshAssistant = (content: string) => {
+        updateMessages(targetThreadId, (current) =>
+          current.map((item) =>
+            item.id === assistantId
+              ? ({
+                  ...item,
+                  content,
+                  additional_kwargs: {
+                    ...item.additional_kwargs,
+                    direct_chat: true,
+                  },
+                } as Message)
+              : item,
+          ),
+        );
+      };
+
+      try {
+        const response = await apiFetch(
+          `${getBackendBaseURL()}/api/direct-chat/stream`,
+          {
+            method: "POST",
+            headers: { "Content-Type": "application/json" },
+            signal: controller.signal,
+            body: JSON.stringify({
+              model_name: modelName,
+              messages: [...history, { role: "user", content: question }],
+            }),
+          },
+        );
+        if (!response.ok) {
+          throw new Error(await readErrorDetail(response));
+        }
+        if (!response.body) {
+          throw new Error("极速问答未返回数据流。");
+        }
+
+        const reader = response.body.getReader();
+        const decoder = new TextDecoder();
+        let buffer = "";
+        while (true) {
+          const { done, value } = await reader.read();
+          if (done) break;
+          buffer += decoder.decode(value, { stream: true });
+          const parsed = parseSseBlocks(buffer);
+          buffer = parsed.rest;
+          for (const block of parsed.events) {
+            let payload: unknown = null;
+            try {
+              payload = JSON.parse(block.data);
+            } catch {
+              continue;
+            }
+            if (block.event === "error") {
+              const detail =
+                payload &&
+                typeof payload === "object" &&
+                "detail" in payload &&
+                typeof (payload as { detail: unknown }).detail === "string"
+                  ? (payload as { detail: string }).detail
+                  : "极速问答失败。";
+              throw new Error(detail);
+            }
+            if (
+              block.event === "delta" &&
+              payload &&
+              typeof payload === "object" &&
+              "text" in payload &&
+              typeof (payload as { text: unknown }).text === "string"
+            ) {
+              answer += (payload as { text: string }).text;
+              refreshAssistant(answer);
+            }
+            if (
+              block.event === "result" &&
+              payload &&
+              typeof payload === "object" &&
+              "answer" in payload &&
+              typeof (payload as { answer: unknown }).answer === "string"
+            ) {
+              answer = (payload as { answer: string }).answer;
+              refreshAssistant(answer);
+            }
+          }
+        }
+        if (!answer) {
+          throw new Error("模型未返回任何文本。");
+        }
+      } catch (caught) {
+        if (!isAbortError(caught)) {
+          const message =
+            caught instanceof Error ? caught.message : "极速问答失败。";
+          setError(message);
+          updateMessages(targetThreadId, (current) =>
+            current.map((item) =>
+              item.id === assistantId
+                ? ({
+                    ...item,
+                    content: answer || message,
+                    additional_kwargs: {
+                      ...item.additional_kwargs,
+                      direct_chat: true,
+                    },
+                  } as Message)
+                : item,
+            ),
+          );
+        }
+      } finally {
+        if (controllerRef.current === controller) controllerRef.current = null;
+        setIsLoading(false);
+      }
+    },
+    [isLoading, updateMessages],
+  );
+
+  return { messages, isLoading, error, submit, stop };
+}
@@ -13,6 +13,7 @@ import { useLocation } from "react-router-dom";
 import { useRouteBase } from "@/core/route-base";
 import { useCallback, useEffect, useMemo, useRef, useState, type ReactNode } from "react";
 import { useQuery } from "@tanstack/react-query";
+import { toast } from "sonner";

 import type { PromptInputMessage } from "@/components/ai-elements/prompt-input";
 import { Button } from "@/components/ui/button";
@@ -48,6 +49,7 @@ import { useNotification } from "@/core/notification/hooks";
 import { saveLastAgentId, useThreadSettings } from "@/core/settings";
 import { stopActiveThreadBeforeClarificationReply, stopThreadRun, useThreadStream } from "@/core/threads/hooks";
 import { useResearchWritingFeed } from "@/core/threads/use-research-writing-feed";
+import { useDirectChatMessages, isDirectChatProfile, isTurboModeVisible } from "@/core/threads/use-direct-chat";
 import { clearResearchReportStream } from "@/core/threads/use-research-report-stream";
 import { textOfMessage } from "@/core/threads/utils";
 import { resolveWritingModeReportPath } from "@/core/threads/writing-mode";
@@ -560,9 +562,26 @@ export default function AgentChatPage({
    },
  });

+  const directChat = useDirectChatMessages(threadId);
+  const directChatSelected =
+    isDirectChatProfile(settings.context) && isTurboModeVisible();
+
  // 写作模式深度研究进度：注入 displayThread 尾部（进度步骤条 + report.md
  // 流式 stub），成功且真实产物落地后自动撤出。
-  const { displayThread } = useResearchWritingFeed(threadId, thread);
+  const { displayThread: researchDisplayThread } = useResearchWritingFeed(threadId, thread);
+  const displayThread = useMemo(() => {
+    const base = researchDisplayThread;
+    if (directChat.messages.length === 0 && !directChat.isLoading) {
+      return base;
+    }
+    const messages = [...base.messages, ...directChat.messages];
+    return {
+      ...base,
+      values: { ...base.values, messages },
+      messages,
+      isLoading: base.isLoading || directChat.isLoading,
+    } as typeof base;
+  }, [directChat.isLoading, directChat.messages, researchDisplayThread]);

  // ── agentfx「入库」协助卡 ──────────────────────────────────────────────────
  // 任务工作区（taskBind）里，内置研判智能体写出的 task-reports.json 产物落地且
@@ -743,6 +762,62 @@ export default function AgentChatPage({

  const handleSubmit = useCallback(
    (message: PromptInputMessage, extraContext?: Record<string, unknown>) => {
+      if (directChatSelected) {
+        if (message.files && message.files.length > 0) {
+          toast.error("极速问答暂不支持附件，请移除附件后重试。");
+          return;
+        }
+        setHasStartedConversation(true);
+        saveLastAgentId(agent_id);
+        window.dispatchEvent(
+          new CustomEvent("workspace:sandbox-resume-autoscroll"),
+        );
+        void (async () => {
+          try {
+            let targetThreadId = threadId;
+            if (isNewThread) {
+              const created = await getAPIClient().threads.create({
+                metadata: {
+                  agent_id,
+                  ...(Object.keys(conversationMetadata).length > 0
+                    ? conversationMetadata
+                    : {}),
+                },
+              });
+              targetThreadId = created.thread_id;
+              knowledgeSelectionThread.current = targetThreadId;
+              activeThreadIdRef.current = targetThreadId;
+              setThreadId(targetThreadId);
+              setIsNewThread(false);
+              history.replaceState(
+                null,
+                "",
+                `${window.location.pathname}${window.location.search}#${agentChatsBase}/${targetThreadId}`,
+              );
+              const title = message.text.trim().replace(/\s+/g, " ").slice(0, 60);
+              if (title) {
+                void getAPIClient().threads
+                  .updateState(targetThreadId, { values: { title } })
+                  .catch(() => undefined);
+              }
+            }
+            if (!targetThreadId) {
+              toast.error("无法创建会话。");
+              return;
+            }
+            await directChat.submit({
+              targetThreadId,
+              query: message.text,
+              modelName: settings.context.model_name,
+            });
+          } catch (error) {
+            toast.error(
+              error instanceof Error ? error.message : "极速问答失败。",
+            );
+          }
+        })();
+        return;
+      }
      setHasStartedConversation(true);
      // Remember this agent so the new-chat landing screen pre-selects it next
      // time (covers both direct agent chats and the ChatPage handoff replay).
@@ -767,7 +842,7 @@ export default function AgentChatPage({
        ...pageReportThemeContext,
      });
    },
-    [sendMessage, threadId, agent_id, settings.context.writing_mode, writingArtifactPath, baseMode],
+    [sendMessage, threadId, agent_id, settings.context.writing_mode, settings.context.model_name, writingArtifactPath, baseMode, directChat, directChatSelected, isNewThread, conversationMetadata, agentChatsBase, setThreadId, setIsNewThread],
  );

  // 任务流程：切换 / 新建会话时，停掉「上一会话服务端在跑」的 run（老对话要停止）。
@@ -852,8 +927,12 @@ export default function AgentChatPage({
  );

  const handleStop = useCallback(async () => {
+    if (directChat.isLoading) {
+      directChat.stop();
+      return;
+    }
    await thread.stop();
-  }, [thread]);
+  }, [directChat, thread]);

  const isLandingState = isNewThread && !hasStartedConversation;
  // 任务闸门面板：仅 rwfx（taskGate）在新建对话且尚未开始时，于问答页顶部展示目的树 + 覆盖确认。
@@ -867,7 +946,7 @@ export default function AgentChatPage({

  const status = thread.error
    ? "error"
-    : thread.isLoading
+    : thread.isLoading || directChat.isLoading
      ? "streaming"
      : "ready";

@@ -1084,7 +1163,7 @@ export default function AgentChatPage({
                        autoFocus
                        status={status}
                        context={settings.context}
-                        disabled={isDemoMode || knowledgeSelectionLoading}
+                        disabled={isDemoMode || knowledgeSelectionLoading || directChat.isLoading}
                        onContextChange={(context) =>
                          setSettings("context", context)
                        }
@@ -1104,7 +1183,7 @@ export default function AgentChatPage({
                                pendingKnowledgeSelection.current === null &&
                                pendingAssistantKnowledgeSelection.current === null
                              }
-                              disabled={isDemoMode || knowledgeSelectionLoading}
+                              disabled={isDemoMode || knowledgeSelectionLoading || directChat.isLoading}
                              label="知识空间"
                            />
                          )
@@ -1175,7 +1254,7 @@ export default function AgentChatPage({
                        assistantId={agent_id}
                        status={status}
                        context={settings.context}
-                        disabled={isDemoMode || knowledgeSelectionLoading}
+                        disabled={isDemoMode || knowledgeSelectionLoading || directChat.isLoading}
                        onContextChange={(context) =>
                          setSettings("context", context)
                        }
@@ -1190,7 +1269,7 @@ export default function AgentChatPage({
                              assistantValue={selectedAssistantKnowledgeBaseIds}
                              onChange={changeKnowledgeSelection}
                              onAssistantChange={changeAssistantKnowledgeSelection}
-                              disabled={isDemoMode || knowledgeSelectionLoading}
+                              disabled={isDemoMode || knowledgeSelectionLoading || directChat.isLoading}
                              readOnly
                              label="知识空间"
                            />
@@ -69,6 +69,7 @@ import { clearResearchReportStream } from "@/core/threads/use-research-report-st
 import { resolveWritingModeReportPath } from "@/core/threads/writing-mode";
 import { queueLlmWikiConversationDeposit } from "@/core/llmwiki/conversation-deposit";
 import { useSingleRoundRagMessages } from "@/core/threads/use-single-round-rag";
+import { useDirectChatMessages, isDirectChatProfile, isTurboModeVisible } from "@/core/threads/use-direct-chat";
 import { useMultiRoundRagMessages, mergeMessagesByTime, toLangGraphMessages } from "@/core/threads/use-multi-round-rag";
 import { useLayoutMode } from "@/core/system-settings/hooks";
 import { useRouteBase } from "@/core/route-base";
@@ -348,9 +349,12 @@ export default function ChatPage() {
  });
  const singleRoundRag = useSingleRoundRagMessages(threadId);
  const multiRoundRag = useMultiRoundRagMessages(threadId);
+  const directChat = useDirectChatMessages(threadId);
  const singleRoundRagSelected = isSingleRoundRagProfile(settings.context);
  const multiRoundRagSelected = isMultiRoundRagProfile(settings.context);
  const frontendRagSelected = isFrontendRagProfile(settings.context);
+  const directChatSelected =
+    isDirectChatProfile(settings.context) && isTurboModeVisible();
  // 写作模式深度研究进度：注入 displayThread 尾部（进度步骤条 + report.md
  // 流式 stub），成功且真实产物落地后自动撤出。
  const { displayThread: researchDisplayThread } = useResearchWritingFeed(threadId, thread);
@@ -360,13 +364,15 @@ export default function ChatPage() {
    if (
      singleRoundRag.messages.length === 0 &&
      ragMessages.length === 0 &&
+      directChat.messages.length === 0 &&
      !singleRoundRag.isLoading &&
-      !multiRoundRag.isLoading
+      !multiRoundRag.isLoading &&
+      !directChat.isLoading
    ) {
      return base;
    }
    const messages = mergeMessagesByTime(
-      [...base.messages, ...singleRoundRag.messages],
+      [...base.messages, ...singleRoundRag.messages, ...directChat.messages],
      ragMessages,
    );
    return {
@@ -374,9 +380,14 @@ export default function ChatPage() {
      values: { ...base.values, messages },
      messages,
      isLoading:
-        base.isLoading || singleRoundRag.isLoading || multiRoundRag.isLoading,
+        base.isLoading ||
+        singleRoundRag.isLoading ||
+        multiRoundRag.isLoading ||
+        directChat.isLoading,
    } as typeof base;
  }, [
+    directChat.isLoading,
+    directChat.messages,
    multiRoundRag.isLoading,
    multiRoundRag.messages,
    researchDisplayThread,
@@ -392,6 +403,52 @@ export default function ChatPage() {

  const handleSubmit = useCallback(
    (message: PromptInputMessage) => {
+      if (directChatSelected) {
+        if (message.files && message.files.length > 0) {
+          toast.error("极速问答暂不支持附件，请移除附件后重试。");
+          return;
+        }
+        setHasStartedConversation(true);
+        window.dispatchEvent(
+          new CustomEvent("workspace:sandbox-resume-autoscroll"),
+        );
+        void (async () => {
+          try {
+            let targetThreadId = threadId;
+            if (isNewThread) {
+              const created = await getAPIClient(isMock).threads.create({});
+              targetThreadId = created.thread_id;
+              setThreadId(targetThreadId);
+              setIsNewThread(false);
+              history.replaceState(
+                null,
+                "",
+                `${window.location.pathname}${window.location.search}#${routeBase}/chats/${targetThreadId}`,
+              );
+              const title = message.text.trim().replace(/\s+/g, " ").slice(0, 60);
+              if (title) {
+                void getAPIClient(isMock).threads
+                  .updateState(targetThreadId, { values: { title } })
+                  .catch(() => undefined);
+              }
+            }
+            if (!targetThreadId) {
+              toast.error("无法创建会话。");
+              return;
+            }
+            await directChat.submit({
+              targetThreadId,
+              query: message.text,
+              modelName: settings.context.model_name,
+            });
+          } catch (error) {
+            toast.error(
+              error instanceof Error ? error.message : "极速问答失败。",
+            );
+          }
+        })();
+        return;
+      }
      if (frontendRagSelected) {
        if (message.files && message.files.length > 0) {
          toast.error("RAG 问答暂不支持附件，请移除附件后重试。");
@@ -560,6 +617,8 @@ export default function ChatPage() {
      multiRoundRag,
      multiRoundRagSelected,
      frontendRagSelected,
+      directChat,
+      directChatSelected,
      routeBase,
      setIsNewThread,
      setThreadId,
@@ -655,6 +714,10 @@ export default function ChatPage() {
    saveLastAgentId(agentId);
  }, []);
  const handleStop = useCallback(async () => {
+    if (directChat.isLoading) {
+      directChat.stop();
+      return;
+    }
    if (singleRoundRag.isLoading) {
      singleRoundRag.stop();
      return;
@@ -664,7 +727,7 @@ export default function ChatPage() {
      return;
    }
    await thread.stop();
-  }, [multiRoundRag, singleRoundRag, thread]);
+  }, [directChat, multiRoundRag, singleRoundRag, thread]);

  const promptPrefixProp = useMemo(() => {
    if (!promptPrefixSettings?.enabled) return undefined;
@@ -914,7 +977,8 @@ export default function ChatPage() {
                        agentHandoffPending ||
                        knowledgeSelectionLoading ||
                        singleRoundRag.isLoading ||
-                        multiRoundRag.isLoading
+                        multiRoundRag.isLoading ||
+                        directChat.isLoading
                      }
                      onContextChange={(context) =>
                        setSettings("context", context)