refactor: remove legacy assistant compatibility

frontend/src/components/assistant-editor/debug-auto-test.tsx

@@ -447,34 +447,6 @@ function startupAssistantMessages(startup: BatchStartupResult): string[] {
   return [greeting, ...assistantMessages].filter(Boolean);
 }
 
-function legacyStartupRuntimeRecords(
-  startup: BatchStartupResult,
-): Array<Record<string, unknown>> {
-  return startup.autoConfirmedMessages.flatMap((message, index) => {
-    const confirmedAction =
-      message.actions?.find((action) => action.id === "confirmed") ??
-      message.actions?.[0];
-    const legacyId = `${index}-${message.title ?? message.message ?? "message"}`;
-    return [
-      {
-        eventId: `legacy-message-started-${legacyId}`,
-        event: "message_started",
-        phase: "opening",
-        requiresConfirmation: true,
-        messageTitle: message.title?.trim() || "未命名消息",
-        messageContent: message.message?.trim() || "（没有消息正文）",
-        messageActions: message.actions ?? [],
-      },
-      {
-        eventId: `legacy-message-completed-${legacyId}`,
-        event: "message_completed",
-        phase: "opening",
-        action: confirmedAction?.id?.trim() || "confirmed",
-      },
-    ];
-  });
-}
-
 function runtimeRecordKey(
   event: Record<string, unknown>,
   prefix: string,
@@ -514,10 +486,7 @@ function AutoTestTimeline({
     });
 
     const openingMessages = startupAssistantMessages(startup);
-    const records =
-      (startup.runtimeRecords?.length ?? 0) > 0
-        ? startup.runtimeRecords ?? []
-        : legacyStartupRuntimeRecords(startup);
+    const records = startup.runtimeRecords ?? [];
     const firstMessageStartedIndex = records.findIndex(
       (event) => event.event === "message_started",
     );

frontend/src/components/pages/AssistantPage.tsx

@@ -727,8 +727,8 @@ export function AssistantPage(props: AssistantPageProps) {
               graph.settings?.turnConfig ?? assistant.turnConfig,
             ),
           };
-          // 编辑器会把兼容字段和默认值写回 graph。状态与保存基线必须使用
-          // 同一个规范化结果，否则页面刚打开就会被误判为有未保存改动。
+          // 状态与保存基线使用同一个完整 graph，避免页面刚打开就被误判
+          // 为有未保存改动。
           const normalizedGraph = workflowGraphWithSettings(graph, wfSettings);
           setWorkflowName(assistant.name);
           setWorkflowGraph(normalizedGraph);

frontend/src/components/workflow/ConditionEdge.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 /**
- * Workflow v3 edge: LLM judgement, variable expression, or deterministic default.
+ * Workflow v4 edge: LLM judgement, variable expression, or deterministic default.
  */
 
 import {

frontend/src/components/workflow/GenericNode.tsx

@@ -18,7 +18,6 @@ import {
 } from "./context";
 import {
   accentVar,
-  messageCompletionPolicy,
   type WorkflowNodeData,
 } from "./specs";
 
@@ -31,7 +30,7 @@ export function GenericNode({ id, type, data, selected }: NodeProps) {
   if (!spec) return null;
 
   const nodeData = data as WorkflowNodeData;
-  const messagePolicy = messageCompletionPolicy(nodeData);
+  const messagePolicy = nodeData.completionPolicy ?? "playback";
   const Icon = spec.icon;
   const preview = (
     nodeData.prompt ||

frontend/src/components/workflow/panels/ActionNodePanel.tsx

@@ -6,10 +6,7 @@ import { SectionCard } from "@/components/editor/section-card";
 import { ToolBindingEditor } from "@/components/tools/tool-binding-editor";
 
 import { NodeSelect } from "./controls";
-import {
-  actionUserInputPolicy,
-  type WorkflowNodeData,
-} from "../specs";
+import { type WorkflowNodeData } from "../specs";
 import type { ModelOption } from "../types";
 import type { DynamicVariableDefinition } from "@/lib/api";
 
@@ -28,7 +25,7 @@ export function ActionNodePanel({
   dynamicVariableDefinitions,
   runtimeMode,
 }: ActionNodePanelProps) {
-  const userInputPolicy = actionUserInputPolicy(draft);
+  const userInputPolicy = draft.userInputPolicy ?? "queue";
 
   return (
     <SectionCard

frontend/src/components/workflow/panels/GlobalSettingsPanel.tsx

@@ -87,7 +87,7 @@ export function GlobalSettingsPanel({
                 ? [{ value: "edge_tool", label: "边工具（Realtime 必需）" }]
                 : [
                     { value: "edge_tool", label: "边工具（低延迟）" },
-                    { value: "llm_router", label: "独立 LLM Router（兼容）" },
+                    { value: "llm_router", label: "独立 LLM Router" },
                   ]
             }
             onChange={(llmRoutingMode) =>

frontend/src/components/workflow/panels/MessageNodePanel.tsx

@@ -14,7 +14,6 @@ import {
 import { Textarea } from "@/components/ui/textarea";
 
 import {
-  messageCompletionPolicy,
   type MessageCompletionPolicy,
   type WorkflowNodeData,
 } from "../specs";
@@ -51,17 +50,13 @@ export function MessageNodePanel({
   set: (key: string, value: unknown) => void;
   setPatch: (patch: Partial<WorkflowNodeData>) => void;
 }) {
-  const completionPolicy = messageCompletionPolicy(draft);
+  const completionPolicy = draft.completionPolicy ?? "playback";
   const completionDescription = COMPLETION_OPTIONS.find(
     (option) => option.value === completionPolicy,
   )?.description;
 
   const selectCompletionPolicy = (value: MessageCompletionPolicy) => {
-    setPatch({
-      completionPolicy: value,
-      requireConfirmation: undefined,
-      showMessage: undefined,
-    });
+    setPatch({ completionPolicy: value });
   };
 
   return (

frontend/src/components/workflow/specs.ts

@@ -1,4 +1,4 @@
-/** Workflow v3 public graph types and defaults. */
+/** Current Workflow graph types and defaults. */
 
 import * as LucideIcons from "lucide-react";
 import { Circle, type LucideIcon } from "lucide-react";
@@ -68,13 +68,9 @@ export type WorkflowNodeData = {
   updates?: StateUpdateRule[];
   userInputPolicy?: ActionUserInputPolicy;
   speech?: string;
-  /** Legacy field read only while an older graph is open in the editor. */
-  showMessage?: boolean;
   title?: string;
   confirmLabel?: string;
   completionPolicy?: MessageCompletionPolicy;
-  /** Legacy field read only while an older graph is open in the editor. */
-  requireConfirmation?: boolean;
   targetType?: "ai" | "human" | "queue" | "phone";
   target?: string;
   message?: string;
@@ -82,27 +78,6 @@ export type WorkflowNodeData = {
   [key: string]: unknown;
 };
 
-/** Infer the new Message policy for graphs saved before it was explicit. */
-export function messageCompletionPolicy(
-  data: WorkflowNodeData,
-): MessageCompletionPolicy {
-  if (
-    data.completionPolicy === "interruptible" ||
-    data.completionPolicy === "playback" ||
-    data.completionPolicy === "confirmation"
-  ) {
-    return data.completionPolicy;
-  }
-  return data.requireConfirmation === true ? "confirmation" : "playback";
-}
-
-/** Older Action nodes allowed input to continue, which matches queue. */
-export function actionUserInputPolicy(
-  data: WorkflowNodeData,
-): ActionUserInputPolicy {
-  return data.userInputPolicy === "block" ? "block" : "queue";
-}
-
 export type ExpressionRule = {
   variable: string;
   operator: ExpressionOperator;

frontend/src/hooks/use-voice-preview.ts

@@ -827,8 +827,7 @@ export function useVoicePreview(
       void refreshDevices();
 
       // SmallWebRTCTransport discards APIRequest.requestData when endpoint is a
-      // Request object. Keep capabilities in a header as the reliable path;
-      // requestData remains below for compatibility with other transports.
+      // Request object, so client capabilities use the request header only.
       const clientToolNames = Array.from(clientToolHandlersRef.current.keys());
       const request = new Request(`${API_BASE}/api/webrtc/offer`, {
         method: "POST",
@@ -849,7 +848,6 @@ export function useVoicePreview(
             assistant_id: assistantId,
             vision_enabled: Boolean(options.visionEnabled),
             dynamic_variables: options.dynamicVariables ?? {},
-            client_tool_names: clientToolNames,
           },
         },
       });