fix(web): keep thinking off the spoken consult and rectification answer

Enumerate evidence kinds so education cannot be proposed as a kind, and stream Chinese thinking on a separate channel that collapses when the reply arrives.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/chat-message-row.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useEffect, useLayoutEffect, useRef } from "react";
+import { useEffect, useLayoutEffect, useRef, useState } from "react";
 
 import { AgentActivityStatus } from "@/components/agent-activity-status";
 import { prefetchOnIdle } from "@/components/chat-chunk-prefetch";
@@ -31,6 +31,30 @@ function motionPreferred() {
 
 if (motionPreferred()) prefetchOnIdle(loadGsap);
 
+function MessageThinkingTrace({
+  text,
+  hasAnswer,
+}: Readonly<{
+  text: string;
+  hasAnswer: boolean;
+}>) {
+  const [userOpen, setUserOpen] = useState<boolean | null>(null);
+  const open = userOpen ?? !hasAnswer;
+  if (!text.trim()) return null;
+  return (
+    <details
+      className="message-thinking"
+      open={open}
+      onToggle={(event) => {
+        setUserOpen((event.currentTarget as HTMLDetailsElement).open);
+      }}
+    >
+      <summary>思考过程</summary>
+      <div className="message-thinking-body">{text}</div>
+    </details>
+  );
+}
+
 export function AgentAvatar() {
   return <span className="agent-avatar" aria-hidden="true" />;
 }
@@ -104,6 +128,12 @@ export function ChatMessageRow({
                   completedTrail={message.activity?.completedTrail}
                 />
               )}
+              {message.thinkingText && (
+                <MessageThinkingTrace
+                  text={message.thinkingText}
+                  hasAnswer={Boolean(message.text.trim())}
+                />
+              )}
               {message.text && (
                 <ChatMessageContent
                   text={message.text}

frontend/src/components/rectification-agentic-chat.tsx

@@ -382,6 +382,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     setDraft("");
 
     let raw = "";
+    let thinkingRaw = "";
     let activityReceiptState = createRectificationActivityReceiptState();
     let completedReceipt = receiptFromRectificationActivityState(activityReceiptState);
     let completedTurnId: string | undefined;
@@ -465,8 +466,18 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
                 }),
               }
               : message));
+          } else if (event.type === "thinking.delta" && typeof event.text === "string") {
+            thinkingRaw += event.text;
+            setMessages((current) => current.map((message) => message.renderKey === assistantRenderKey
+              ? {
+                ...message,
+                thinkingText: thinkingRaw,
+                state: raw ? "streaming" : "thinking",
+              }
+              : message));
           } else if (event.type === "attempt.reset") {
             raw = "";
+            thinkingRaw = "";
             activityReceiptState = createRectificationActivityReceiptState();
             completedReceipt = receiptFromRectificationActivityState(activityReceiptState);
             completedTurnId = undefined;
@@ -474,6 +485,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
               ? {
                 ...message,
                 text: "",
+                thinkingText: undefined,
                 state: "thinking",
                 completedReceipt: undefined,
                 failed: false,
@@ -806,6 +818,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
               ? {
                 ...message,
                 text: "",
+                thinkingText: undefined,
                 state: "thinking" as const,
                 activity: nextActivityView(undefined, {
                   phase: "answer-composition",