feat(frontend): add top prompt anchor navigation

frontend/src/components/assistant-editor/prompt-editor.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import { useEffect, useRef, useState } from "react";
 import {
   Bot,
   Brain,
@@ -37,6 +38,15 @@ import type { DynamicVariableDefinition, Tool } from "@/lib/api";
 
 type ResourceOption = { value: string; label: string };
 
+const promptSections = [
+  { id: "conversation", label: "对话内容" },
+  { id: "models", label: "模型与语音" },
+  { id: "capabilities", label: "知识与工具" },
+  { id: "interaction", label: "交互策略" },
+] as const;
+
+type PromptSectionId = (typeof promptSections)[number]["id"];
+
 type PromptEditorProps = {
   assistantId: string | null;
   form: AssistantForm;
@@ -86,6 +96,102 @@ export function PromptEditor({
   handlePromptModelChange,
 }: PromptEditorProps) {
   const openingMessage = form.startup.openingMessage;
+  const scrollContainerRef = useRef<HTMLDivElement>(null);
+  const sectionRefs = useRef<Record<PromptSectionId, HTMLElement | null>>({
+    conversation: null,
+    models: null,
+    capabilities: null,
+    interaction: null,
+  });
+  const selectedAnchorRef = useRef<PromptSectionId | null>(null);
+  const [activeSection, setActiveSection] =
+    useState<PromptSectionId>("conversation");
+
+  useEffect(() => {
+    const container = scrollContainerRef.current;
+    if (!container) return;
+    const scrollContainer: HTMLDivElement = container;
+
+    let animationFrame = 0;
+
+    function updateActiveSection() {
+      if (selectedAnchorRef.current) {
+        setActiveSection(selectedAnchorRef.current);
+        return;
+      }
+
+      const containerTop = scrollContainer.getBoundingClientRect().top;
+      const activationLine = containerTop + 24;
+      let nextSection: PromptSectionId = promptSections[0].id;
+
+      for (const section of promptSections) {
+        const element = sectionRefs.current[section.id];
+        if (element && element.getBoundingClientRect().top <= activationLine) {
+          nextSection = section.id;
+        }
+      }
+
+      const reachedBottom =
+        scrollContainer.scrollHeight > scrollContainer.clientHeight + 8 &&
+        scrollContainer.scrollHeight -
+          scrollContainer.scrollTop -
+          scrollContainer.clientHeight <
+          8;
+      if (reachedBottom) {
+        nextSection = promptSections[promptSections.length - 1].id;
+      }
+
+      setActiveSection((current) =>
+        current === nextSection ? current : nextSection,
+      );
+    }
+
+    function scheduleUpdate() {
+      window.cancelAnimationFrame(animationFrame);
+      animationFrame = window.requestAnimationFrame(updateActiveSection);
+    }
+
+    function releaseSelectedAnchor() {
+      selectedAnchorRef.current = null;
+      scheduleUpdate();
+    }
+
+    scheduleUpdate();
+    scrollContainer.addEventListener("scroll", scheduleUpdate, {
+      passive: true,
+    });
+    scrollContainer.addEventListener("wheel", releaseSelectedAnchor, {
+      passive: true,
+    });
+    scrollContainer.addEventListener("touchstart", releaseSelectedAnchor, {
+      passive: true,
+    });
+    window.addEventListener("resize", scheduleUpdate);
+
+    return () => {
+      window.cancelAnimationFrame(animationFrame);
+      scrollContainer.removeEventListener("scroll", scheduleUpdate);
+      scrollContainer.removeEventListener("wheel", releaseSelectedAnchor);
+      scrollContainer.removeEventListener("touchstart", releaseSelectedAnchor);
+      window.removeEventListener("resize", scheduleUpdate);
+    };
+  }, [form.runtimeMode]);
+
+  function scrollToSection(sectionId: PromptSectionId) {
+    const container = scrollContainerRef.current;
+    const section = sectionRefs.current[sectionId];
+    if (!container || !section) return;
+
+    const containerTop = container.getBoundingClientRect().top;
+    const sectionTop = section.getBoundingClientRect().top;
+
+    selectedAnchorRef.current = sectionId;
+    setActiveSection(sectionId);
+    container.scrollTo({
+      top: container.scrollTop + sectionTop - containerTop,
+      behavior: "smooth",
+    });
+  }
 
   function setOpeningMessage(enabled: boolean) {
     updateForm("startup", {
@@ -156,227 +262,295 @@ export function PromptEditor({
       />
 
       <div className="flex min-h-0 flex-1 gap-4">
-        <div className="scrollbar-subtle min-w-0 flex-1 space-y-3 overflow-y-auto pr-1">
-          <SectionCard
-            icon={<MessageSquareText size={15} />}
-            title="提示词"
-            description="描述助手的角色、能力和回答要求"
+        <div className="flex min-h-0 min-w-0 flex-1 flex-col gap-3">
+          <nav
+            aria-label="提示词配置分区"
+            className="shrink-0 overflow-x-auto"
           >
-            <TextAreaField
-              value={form.prompt}
-              onChange={(value) => updateForm("prompt", value)}
-              placeholder="请输入提示词，描述助手的角色、能力和回答要求"
-              rows={8}
-            />
-            <DynamicVariableEditorHint
-              count={Object.keys(dynamicVariableDefinitions).length}
-              onOpen={() => setDynamicVariablesOpen(true)}
-            />
-          </SectionCard>
+            <div className="grid min-w-[22rem] grid-cols-4 border-b border-hairline">
+              {promptSections.map((section) => {
+                const active = activeSection === section.id;
 
-          <SectionCard
-            icon={<Bot size={15} />}
-            title="开场白"
-            description="助手与用户首次对话时的开场语"
+                return (
+                  <button
+                    key={section.id}
+                    type="button"
+                    aria-current={active ? "location" : undefined}
+                    onClick={() => scrollToSection(section.id)}
+                    className={[
+                      "-mb-px whitespace-nowrap border-b-2 px-2 py-2.5 text-center text-xs transition-colors sm:px-3 sm:text-sm",
+                      active
+                        ? "border-primary text-foreground"
+                        : "border-transparent text-muted-foreground hover:bg-surface-strong/50 hover:text-foreground",
+                    ].join(" ")}
+                  >
+                    {section.label}
+                  </button>
+                );
+              })}
+            </div>
+          </nav>
+
+          <div
+            ref={scrollContainerRef}
+            className="scrollbar-subtle min-h-0 min-w-0 flex-1 space-y-3 overflow-y-auto pr-1"
           >
-            <TextAreaField
-              value={form.greeting}
-              onChange={(value) => updateForm("greeting", value)}
-              placeholder="请输入助手开场白"
-            />
-            <DynamicVariableEditorHint
-              count={Object.keys(dynamicVariableDefinitions).length}
-              onOpen={() => setDynamicVariablesOpen(true)}
-            />
-            {form.runtimeMode === "pipeline" && (
-              <div className="mt-4 space-y-3 border-t border-hairline pt-4">
-                <ToggleRow
-                  title="开场确认弹窗"
-                  description="与开场白同时显示，用户确认后即可开始对话，不等待播报完成。"
-                  checked={Boolean(openingMessage)}
-                  onChange={setOpeningMessage}
+            <section
+              ref={(element) => {
+                sectionRefs.current.conversation = element;
+              }}
+              className="scroll-mt-3 space-y-3"
+            >
+              <SectionCard
+                icon={<MessageSquareText size={15} />}
+                title="提示词"
+                description="描述助手的角色、能力和回答要求"
+              >
+                <TextAreaField
+                  value={form.prompt}
+                  onChange={(value) => updateForm("prompt", value)}
+                  placeholder="请输入提示词，描述助手的角色、能力和回答要求"
+                  rows={8}
                 />
+                <DynamicVariableEditorHint
+                  count={Object.keys(dynamicVariableDefinitions).length}
+                  onOpen={() => setDynamicVariablesOpen(true)}
+                />
+              </SectionCard>
 
-                {openingMessage && (
-                  <div className="space-y-3 rounded-xl border border-hairline bg-canvas-soft p-4">
-                    <label className="block">
-                      <span className="mb-1.5 block text-sm font-medium text-foreground">
-                        弹窗标题
-                      </span>
-                      <Input
-                        value={openingMessage.title}
-                        onChange={(event) =>
-                          updateOpeningMessage({ title: event.target.value })
-                        }
-                        placeholder="重要提示"
-                        className="border-hairline-strong bg-background"
-                      />
-                    </label>
-                    <TextAreaField
-                      label="重要信息"
-                      value={openingMessage.message}
-                      onChange={(message) => updateOpeningMessage({ message })}
-                      placeholder="请输入需要用户确认的重要信息"
-                      rows={4}
+              <SectionCard
+                icon={<Bot size={15} />}
+                title="开场白"
+                description="助手与用户首次对话时的开场语"
+              >
+                <TextAreaField
+                  value={form.greeting}
+                  onChange={(value) => updateForm("greeting", value)}
+                  placeholder="请输入助手开场白"
+                />
+                <DynamicVariableEditorHint
+                  count={Object.keys(dynamicVariableDefinitions).length}
+                  onOpen={() => setDynamicVariablesOpen(true)}
+                />
+                {form.runtimeMode === "pipeline" && (
+                  <div className="mt-4 space-y-3 border-t border-hairline pt-4">
+                    <ToggleRow
+                      title="开场确认弹窗"
+                      description="与开场白同时显示，用户确认后即可开始对话，不等待播报完成。"
+                      checked={Boolean(openingMessage)}
+                      onChange={setOpeningMessage}
                     />
-                    <label className="block">
-                      <span className="mb-1.5 block text-sm font-medium text-foreground">
-                        确认按钮
-                      </span>
-                      <Input
-                        value={openingMessage.confirmLabel}
-                        onChange={(event) =>
-                          updateOpeningMessage({
-                            confirmLabel: event.target.value,
-                          })
-                        }
-                        placeholder="确认"
-                        className="border-hairline-strong bg-background"
-                      />
-                    </label>
-                    <p className="text-xs leading-5 text-muted-foreground">
-                      弹窗不可跳过；失败时将结束本次通话。这是平台内置开场阶段，
-                      不会作为工具暴露给模型。
-                    </p>
+
+                    {openingMessage && (
+                      <div className="space-y-3 rounded-xl border border-hairline bg-canvas-soft p-4">
+                        <label className="block">
+                          <span className="mb-1.5 block text-sm font-medium text-foreground">
+                            弹窗标题
+                          </span>
+                          <Input
+                            value={openingMessage.title}
+                            onChange={(event) =>
+                              updateOpeningMessage({ title: event.target.value })
+                            }
+                            placeholder="重要提示"
+                            className="border-hairline-strong bg-background"
+                          />
+                        </label>
+                        <TextAreaField
+                          label="重要信息"
+                          value={openingMessage.message}
+                          onChange={(message) =>
+                            updateOpeningMessage({ message })
+                          }
+                          placeholder="请输入需要用户确认的重要信息"
+                          rows={4}
+                        />
+                        <label className="block">
+                          <span className="mb-1.5 block text-sm font-medium text-foreground">
+                            确认按钮
+                          </span>
+                          <Input
+                            value={openingMessage.confirmLabel}
+                            onChange={(event) =>
+                              updateOpeningMessage({
+                                confirmLabel: event.target.value,
+                              })
+                            }
+                            placeholder="确认"
+                            className="border-hairline-strong bg-background"
+                          />
+                        </label>
+                        <p className="text-xs leading-5 text-muted-foreground">
+                          弹窗不可跳过；失败时将结束本次通话。这是平台内置开场阶段，
+                          不会作为工具暴露给模型。
+                        </p>
+                      </div>
+                    )}
                   </div>
                 )}
-              </div>
-            )}
-          </SectionCard>
+              </SectionCard>
+            </section>
 
-          <SectionCard
-            icon={<Brain size={15} />}
-            title="模型与语音"
-            description={
-              form.runtimeMode === "pipeline"
-                ? "选择运行方式，以及大语言模型、语音识别与语音合成资源"
-                : "选择运行方式；Realtime 模型内置语音识别与语音合成"
-            }
-          >
-            <RuntimeModeSelector
-              value={form.runtimeMode}
-              onChange={(runtimeMode) => {
-                updateForm("runtimeMode", runtimeMode);
-                if (
-                  runtimeMode === "realtime" &&
-                  (form.startup.actions.length || form.startup.openingMessage)
-                ) {
-                  updateForm("startup", {
-                    executionMode: "sequential",
-                    actions: [],
-                    openingMessage: null,
-                  });
-                }
+            <section
+              ref={(element) => {
+                sectionRefs.current.models = element;
               }}
-            />
-
-            {form.runtimeMode === "pipeline" ? (
-              <>
-                <ResourceSelectField
-                  label="大语言模型"
-                  value={form.model}
-                  onChange={handlePromptModelChange}
-                  options={llmOptions}
-                  noneLabel="无"
-                />
-                <ResourceSelectField
-                  label="语音识别"
-                  value={form.asr}
-                  onChange={(value) => updateForm("asr", value)}
-                  options={asrOptions}
-                  noneLabel="无"
-                />
-                <ResourceSelectField
-                  label="语音合成"
-                  value={form.voice}
-                  onChange={(value) => updateForm("voice", value)}
-                  options={ttsOptions}
-                  noneLabel="无"
-                />
-              </>
-            ) : (
-              <ResourceSelectField
-                label="Realtime 模型"
-                value={form.realtimeModel}
-                onChange={(value) => updateForm("realtimeModel", value)}
-                options={realtimeOptions}
-                noneLabel="无"
-              />
-            )}
-          </SectionCard>
-
-          {form.runtimeMode === "pipeline" && (
-            <VisionConfigSection
-              description="配置提示词助手是否可以按需理解用户摄像头画面"
-              hint="开启后，助手会获得读取当前视频画面的工具。选择「模型自己」时，大语言模型必须支持图片输入。"
-              enabled={form.visionEnabled}
-              modelResourceId={form.visionModelResourceId}
-              mainModelResourceId={form.model}
-              modelOptions={visionModelOptions}
-              onEnabledChange={handlePromptVisionEnabledChange}
-              onModelResourceIdChange={(value) =>
-                updateForm("visionModelResourceId", value)
-              }
-            />
-          )}
-
-          {form.runtimeMode === "pipeline" && (
-            <SectionCard
-              icon={<Database size={15} />}
-              title="知识库配置"
-              description="选择助手回答时可检索的业务知识来源"
+              className="scroll-mt-3 space-y-3"
             >
-              <div className="flex items-center gap-1.5">
-                <span className="text-sm font-medium text-foreground">
-                  知识库选择
-                </span>
-                <KnowledgeRetrievalConfigDialog
-                  disabled={!form.knowledgeBase}
-                  value={form.knowledgeRetrievalConfig}
-                  onChange={(config) =>
-                    updateForm("knowledgeRetrievalConfig", config)
+              <SectionCard
+                icon={<Brain size={15} />}
+                title="模型与语音"
+                description={
+                  form.runtimeMode === "pipeline"
+                    ? "选择运行方式，以及大语言模型、语音识别与语音合成资源"
+                    : "选择运行方式；Realtime 模型内置语音识别与语音合成"
+                }
+              >
+                <RuntimeModeSelector
+                  value={form.runtimeMode}
+                  onChange={(runtimeMode) => {
+                    updateForm("runtimeMode", runtimeMode);
+                    if (
+                      runtimeMode === "realtime" &&
+                      (form.startup.actions.length ||
+                        form.startup.openingMessage)
+                    ) {
+                      updateForm("startup", {
+                        executionMode: "sequential",
+                        actions: [],
+                        openingMessage: null,
+                      });
+                    }
+                  }}
+                />
+
+                {form.runtimeMode === "pipeline" ? (
+                  <>
+                    <ResourceSelectField
+                      label="大语言模型"
+                      value={form.model}
+                      onChange={handlePromptModelChange}
+                      options={llmOptions}
+                      noneLabel="无"
+                    />
+                    <ResourceSelectField
+                      label="语音识别"
+                      value={form.asr}
+                      onChange={(value) => updateForm("asr", value)}
+                      options={asrOptions}
+                      noneLabel="无"
+                    />
+                    <ResourceSelectField
+                      label="语音合成"
+                      value={form.voice}
+                      onChange={(value) => updateForm("voice", value)}
+                      options={ttsOptions}
+                      noneLabel="无"
+                    />
+                  </>
+                ) : (
+                  <ResourceSelectField
+                    label="Realtime 模型"
+                    value={form.realtimeModel}
+                    onChange={(value) => updateForm("realtimeModel", value)}
+                    options={realtimeOptions}
+                    noneLabel="无"
+                  />
+                )}
+              </SectionCard>
+            </section>
+
+            <section
+              ref={(element) => {
+                sectionRefs.current.capabilities = element;
+              }}
+              className="scroll-mt-3 space-y-3"
+            >
+              {form.runtimeMode === "pipeline" && (
+                <VisionConfigSection
+                  description="配置提示词助手是否可以按需理解用户摄像头画面"
+                  hint="开启后，助手会获得读取当前视频画面的工具。选择「模型自己」时，大语言模型必须支持图片输入。"
+                  enabled={form.visionEnabled}
+                  modelResourceId={form.visionModelResourceId}
+                  mainModelResourceId={form.model}
+                  modelOptions={visionModelOptions}
+                  onEnabledChange={handlePromptVisionEnabledChange}
+                  onModelResourceIdChange={(value) =>
+                    updateForm("visionModelResourceId", value)
                   }
                 />
-              </div>
-              <ResourceSelectField
-                value={form.knowledgeBase}
-                onChange={(value) => updateForm("knowledgeBase", value)}
-                options={kbOptions}
-                noneLabel="无"
-              />
-            </SectionCard>
-          )}
+              )}
 
-          <SectionCard
-            icon={<Wrench size={15} />}
-            title="工具"
-            description="配置该提示词助手可以调用的工具"
-          >
-            <ToolPicker
-              tools={tools.filter((tool) => tool.status === "active")}
-              selectedIds={form.toolIds}
-              onChange={(toolIds) => updateForm("toolIds", toolIds)}
-            />
-          </SectionCard>
+              {form.runtimeMode === "pipeline" && (
+                <SectionCard
+                  icon={<Database size={15} />}
+                  title="知识库配置"
+                  description="选择助手回答时可检索的业务知识来源"
+                >
+                  <div className="flex items-center gap-1.5">
+                    <span className="text-sm font-medium text-foreground">
+                      知识库选择
+                    </span>
+                    <KnowledgeRetrievalConfigDialog
+                      disabled={!form.knowledgeBase}
+                      value={form.knowledgeRetrievalConfig}
+                      onChange={(config) =>
+                        updateForm("knowledgeRetrievalConfig", config)
+                      }
+                    />
+                  </div>
+                  <ResourceSelectField
+                    value={form.knowledgeBase}
+                    onChange={(value) => updateForm("knowledgeBase", value)}
+                    options={kbOptions}
+                    noneLabel="无"
+                  />
+                </SectionCard>
+              )}
 
-          <SectionCard
-            icon={<Sparkles size={15} />}
-            title="交互策略"
-            description="设置实时视频对话时的交互体验"
-          >
-            {form.runtimeMode === "pipeline" ? (
-              <TurnConfigEditor
-                enabled={form.enableInterrupt}
-                config={form.turnConfig}
-                onEnabledChange={(checked) => updateForm("enableInterrupt", checked)}
-                onConfigChange={(config) => updateForm("turnConfig", config)}
-              />
-            ) : (
-              <p className="text-sm text-muted-foreground">
-                高级抢话与轮次检测当前仅支持 Pipeline 模式。
-              </p>
-            )}
-          </SectionCard>
+              <SectionCard
+                icon={<Wrench size={15} />}
+                title="工具"
+                description="配置该提示词助手可以调用的工具"
+              >
+                <ToolPicker
+                  tools={tools.filter((tool) => tool.status === "active")}
+                  selectedIds={form.toolIds}
+                  onChange={(toolIds) => updateForm("toolIds", toolIds)}
+                />
+              </SectionCard>
+            </section>
+
+            <section
+              ref={(element) => {
+                sectionRefs.current.interaction = element;
+              }}
+              className="scroll-mt-3 space-y-3"
+            >
+              <SectionCard
+                icon={<Sparkles size={15} />}
+                title="交互策略"
+                description="设置实时视频对话时的交互体验"
+              >
+                {form.runtimeMode === "pipeline" ? (
+                  <TurnConfigEditor
+                    enabled={form.enableInterrupt}
+                    config={form.turnConfig}
+                    onEnabledChange={(checked) =>
+                      updateForm("enableInterrupt", checked)
+                    }
+                    onConfigChange={(config) =>
+                      updateForm("turnConfig", config)
+                    }
+                  />
+                ) : (
+                  <p className="text-sm text-muted-foreground">
+                    高级抢话与轮次检测当前仅支持 Pipeline 模式。
+                  </p>
+                )}
+              </SectionCard>
+            </section>
+          </div>
         </div>
 
         <DebugDrawer