diff --git a/web/pages/Assistants.tsx b/web/pages/Assistants.tsx
index 2428bf6..ba41598 100644
--- a/web/pages/Assistants.tsx
+++ b/web/pages/Assistants.tsx
@@ -3,6 +3,22 @@ import React, { useState, useEffect, useMemo, useRef } from 'react';
 import { createPortal } from 'react-dom';
 import { Plus, Search, Play, Square, Copy, Trash2, Mic, MessageSquare, Save, Video, PhoneOff, Camera, ArrowLeftRight, Send, Phone, Rocket, AlertTriangle, PhoneCall, CameraOff, Image, Images, CloudSun, Calendar, TrendingUp, Coins, Wrench, Globe, Terminal, X, ClipboardCheck, Sparkles, Volume2, Timer, ChevronDown, Database, Server, Zap, ExternalLink, Key, BrainCircuit, Ear, Book, Filter } from 'lucide-react';
 import { Button, Input, Badge, Drawer, Dialog, Switch } from '../components/UI';
+import TranscriptList from '../components/debug-transcript/TranscriptList';
+import type { DebugTranscriptRow } from '../components/debug-transcript/types';
+import {
+  appendNoticeRow,
+  appendTextRow,
+  attachAssistantTtfb,
+  finalizeAssistantTextRow,
+  finalizeUserDraftRow,
+  normalizeToolStatus,
+  resetTranscriptRows,
+  resolveToolResultRow,
+  trimInterruptedResponseRows,
+  updateAssistantDeltaRow,
+  updateUserDraftRow,
+  upsertToolCallRow,
+} from '../components/debug-transcript/message-utils';
 import { ASRModel, Assistant, AssistantOpenerToolCall, KnowledgeBase, LLMModel, TabValue, Tool, Voice } from '../types';
 import { createAssistant, deleteAssistant, fetchASRModels, fetchAssistantOpenerAudioPcmBuffer, fetchAssistants, fetchKnowledgeBases, fetchLLMModels, fetchTools, fetchVoices, generateAssistantOpenerAudio, previewVoice, updateAssistant as updateAssistantApi } from '../services/backendApi';
 import { useDebugPrefsStore } from '../stores/debugPrefsStore';
@@ -877,9 +893,13 @@ export const AssistantsPage: React.FC = () => {
 
                       {selectedAssistant.configMode === 'fastgpt' && (
                         <div className="space-y-2">
-                          <label className="text-sm font-medium text-white flex items-center">
+                          <label className="hidden">
                             <Key className="w-4 h-4 mr-2 text-primary" /> 搴旂敤 ID (APP ID)
+                            <span className="text-sm text-white">?? ID (APP ID)</span>
                           </label>
+                          <div className="text-sm font-medium text-white flex items-center">
+                            <Key className="w-4 h-4 mr-2 text-primary" /> 应用 ID (APP ID)
+                          </div>
                           <Input
                             value={selectedAssistant.appId || ''}
                             onChange={(e) => updateAssistant('appId', e.target.value)}
@@ -2221,13 +2241,6 @@ const extractDynamicTemplateKeys = (text: string): string[] => {
   return Array.from(keys);
 };
 
-type DebugTranscriptMessage = {
-  role: 'user' | 'model' | 'tool';
-  text: string;
-  responseId?: string;
-  ttfbMs?: number;
-};
-
 type DebugPromptPendingResult = {
   toolCallId: string;
   toolName: string;
@@ -2399,33 +2412,6 @@ const normalizeFastGPTInteractiveFields = (rawForm: unknown[]): DebugFastGPTInte
   return resolved;
 };
 
-// Stable transcription log so the scroll container is not recreated on every render (avoids scroll jumping)
-const TranscriptionLog: React.FC<{
-  scrollRef: React.RefObject<HTMLDivElement | null>;
-  messages: DebugTranscriptMessage[];
-  isLoading: boolean;
-  className?: string;
-}> = ({ scrollRef, messages, isLoading, className = '' }) => (
-  <div ref={scrollRef} className={`overflow-y-auto overflow-x-hidden space-y-4 p-2 border border-white/5 rounded-md bg-black/20 min-h-0 custom-scrollbar ${className}`}>
-    {messages.length === 0 && <div className="text-center text-muted-foreground text-xs py-4">暂无转写记录</div>}
-    {messages.map((m, i) => (
-      <div key={i} className={`flex ${m.role === 'user' ? 'justify-end' : 'justify-start'}`}>
-        <div className={`max-w-[85%] rounded-lg px-3 py-2 text-sm ${m.role === 'user' ? 'bg-primary text-primary-foreground' : m.role === 'tool' ? 'bg-amber-500/10 border border-amber-400/30 text-amber-100' : 'bg-card border border-white/10 shadow-sm text-foreground'}`}>
-          <div className="mb-0.5 flex items-center gap-1.5">
-            <span className="text-[10px] opacity-70 uppercase tracking-wider">{m.role === 'user' ? 'Me' : m.role === 'tool' ? 'Tool' : 'AI'}</span>
-            {m.role === 'model' && typeof m.ttfbMs === 'number' && Number.isFinite(m.ttfbMs) && (
-              <span className="rounded border border-cyan-300/40 bg-cyan-500/10 px-1.5 py-0.5 text-[10px] text-cyan-200">
-                TTFB {Math.round(m.ttfbMs)}ms
-              </span>
-            )}
-          </div>
-          {m.text}
-        </div>
-      </div>
-    ))}
-  </div>
-);
-
 // --- Debug Drawer Component ---
 export const DebugDrawer: React.FC<{
   isOpen: boolean;
@@ -2483,7 +2469,7 @@ export const DebugDrawer: React.FC<{
     };
 
     const [mode, setMode] = useState<'text' | 'voice' | 'video'>('text');
-    const [messages, setMessages] = useState<DebugTranscriptMessage[]>([]);
+    const [messages, setMessages] = useState<DebugTranscriptRow[]>([]);
     const [inputText, setInputText] = useState('');
     const [isLoading, setIsLoading] = useState(false);
     const [callStatus, setCallStatus] = useState<'idle' | 'calling' | 'active'>('idle');
@@ -2581,8 +2567,7 @@ export const DebugDrawer: React.FC<{
     const pendingResolveRef = useRef<(() => void) | null>(null);
     const pendingRejectRef = useRef<((e: Error) => void) | null>(null);
     const submittedMetadataRef = useRef<Record<string, any> | null>(null);
-    const assistantDraftIndexRef = useRef<number | null>(null);
-    const assistantResponseIndexByIdRef = useRef<Map<string, number>>(new Map());
+    const assistantDraftRowIdRef = useRef<string | null>(null);
     const pendingTtfbByResponseIdRef = useRef<Map<string, number>>(new Map());
     const interruptedResponseIdsRef = useRef<Set<string>>(new Set());
     const interruptedDropNoticeKeysRef = useRef<Set<string>>(new Set());
@@ -2606,7 +2591,7 @@ export const DebugDrawer: React.FC<{
     const micProcessorRef = useRef<ScriptProcessorNode | null>(null);
     const micGainRef = useRef<GainNode | null>(null);
     const micFrameBufferRef = useRef<Uint8Array>(new Uint8Array(0));
-    const userDraftIndexRef = useRef<number | null>(null);
+    const userDraftRowIdRef = useRef<string | null>(null);
     const lastUserFinalRef = useRef<string>('');
     const debugVolumePercentRef = useRef<number>(50);
     const clientToolEnabledMapRef = useRef<Record<string, boolean>>(clientToolEnabledMap);
@@ -2647,8 +2632,7 @@ export const DebugDrawer: React.FC<{
     }, [assistant.tools, tools, clientToolEnabledMap]);
 
     const clearResponseTracking = () => {
-      assistantDraftIndexRef.current = null;
-      assistantResponseIndexByIdRef.current.clear();
+      assistantDraftRowIdRef.current = null;
       pendingTtfbByResponseIdRef.current.clear();
       interruptedResponseIdsRef.current.clear();
       interruptedDropNoticeKeysRef.current.clear();
@@ -2660,6 +2644,18 @@ export const DebugDrawer: React.FC<{
       return responseId || undefined;
     };
 
+    const extractTurnId = (payload: any): string | undefined => {
+      const turnIdRaw = payload?.data?.turn_id ?? payload?.turn_id ?? payload?.turnId;
+      const turnId = String(turnIdRaw || '').trim();
+      return turnId || undefined;
+    };
+
+    const extractUtteranceId = (payload: any): string | undefined => {
+      const utteranceIdRaw = payload?.data?.utterance_id ?? payload?.utterance_id ?? payload?.utteranceId;
+      const utteranceId = String(utteranceIdRaw || '').trim();
+      return utteranceId || undefined;
+    };
+
     const noteInterruptedDrop = (responseId: string, kind: 'ttfb' | 'delta' | 'final') => {
       const key = `${responseId}:${kind}`;
       if (interruptedDropNoticeKeysRef.current.has(key)) return;
@@ -2668,13 +2664,9 @@ export const DebugDrawer: React.FC<{
         const oldest = interruptedDropNoticeKeysRef.current.values().next().value as string | undefined;
         if (oldest) interruptedDropNoticeKeysRef.current.delete(oldest);
       }
-      setMessages((prev) => [
-        ...prev,
-        {
-          role: 'tool',
-          text: `drop stale ${kind} from interrupted response ${responseId}`,
-        },
-      ]);
+      setMessages((prev) =>
+        appendNoticeRow(prev, `drop stale ${kind} from interrupted response ${responseId}`)
+      );
     };
 
     // Initialize
@@ -2682,11 +2674,11 @@ export const DebugDrawer: React.FC<{
       if (isOpen) {
         if (mode === 'text') {
           clearResponseTracking();
-          setMessages([]);
+          setMessages(resetTranscriptRows());
           setTextSessionStarted(false);
         } else {
           clearResponseTracking();
-          setMessages([]);
+          setMessages(resetTranscriptRows());
           setCallStatus('idle');
           setAgentState('listening');
         }
@@ -2967,17 +2959,18 @@ export const DebugDrawer: React.FC<{
       const statusCode = Number(resultPayload?.status?.code || 500);
       const statusMessage = String(resultPayload?.status?.message || 'error');
       const displayName = toolDisplayName || String(resultPayload?.name || 'unknown_tool');
-      const resultText =
-        statusCode === 200 && typeof resultPayload?.output?.result === 'number'
-          ? `result ${displayName} = ${resultPayload.output.result}`
-          : `result ${displayName} status=${statusCode} ${statusMessage}`;
-      setMessages((prev) => [
-        ...prev,
-        {
-          role: 'tool',
-          text: resultText,
-        },
-      ]);
+      setMessages((prev) =>
+        resolveToolResultRow(prev, {
+          toolCallId: String(resultPayload?.tool_call_id || '').trim(),
+          toolName: normalizeToolId(resultPayload?.name || 'unknown_tool'),
+          toolDisplayName: displayName,
+          source: 'client',
+          status: normalizeToolStatus(statusCode, statusMessage),
+          result: resultPayload?.output,
+          error: statusCode >= 200 && statusCode < 300 ? undefined : resultPayload?.output ?? statusMessage,
+          rawResult: resultPayload,
+        })
+      );
     };
 
     const stopPromptVoicePlayback = () => {
@@ -3404,7 +3397,12 @@ export const DebugDrawer: React.FC<{
         setCallStatus('calling');
         setTimeout(() => {
           setCallStatus('active');
-          setMessages([{ role: 'model', text: assistant.opener || "Hello!" }]);
+          setMessages(
+            appendTextRow(resetTranscriptRows(), {
+              role: 'assistant',
+              text: assistant.opener || 'Hello!',
+            })
+          );
         }, 1500);
         return;
       }
@@ -3412,7 +3410,7 @@ export const DebugDrawer: React.FC<{
         try {
           setCallStatus('calling');
           clearResponseTracking();
-          setMessages([]);
+          setMessages(resetTranscriptRows());
           lastUserFinalRef.current = '';
           setWsError('');
           setDynamicVariablesError('');
@@ -3454,7 +3452,7 @@ export const DebugDrawer: React.FC<{
       setCallStatus('idle');
       setAgentState('listening');
       clearResponseTracking();
-      setMessages([]);
+      setMessages(resetTranscriptRows());
       setTextPromptDialog({ open: false, message: '', promptType: 'text' });
       setChoicePromptDialog({ open: false, question: '', options: [] });
       lastUserFinalRef.current = '';
@@ -3464,8 +3462,14 @@ export const DebugDrawer: React.FC<{
     const handleSend = async () => {
       if (!inputText.trim()) return;
       const userMsg = inputText;
-      assistantDraftIndexRef.current = null;
-      setMessages(prev => [...prev, { role: 'user', text: userMsg }]);
+      assistantDraftRowIdRef.current = null;
+      setMessages((prev) =>
+        appendTextRow(prev, {
+          role: 'user',
+          text: userMsg,
+          isStreaming: false,
+        })
+      );
       setInputText('');
       setIsLoading(true);
 
@@ -3485,7 +3489,13 @@ export const DebugDrawer: React.FC<{
           wsRef.current?.send(JSON.stringify({ type: 'input.text', text: userMsg }));
         } else {
           setTimeout(() => {
-            setMessages(prev => [...prev, { role: 'model', text: `[Mock Response]: Received "${userMsg}"` }]);
+            setMessages((prev) =>
+              appendTextRow(prev, {
+                role: 'assistant',
+                text: `[Mock Response]: Received "${userMsg}"`,
+                isStreaming: false,
+              })
+            );
             setIsLoading(false);
           }, 1000);
         }
@@ -3497,7 +3507,13 @@ export const DebugDrawer: React.FC<{
           return;
         }
         const errMessage = err?.message || 'Failed to connect to AI service.';
-        setMessages(prev => [...prev, { role: 'model', text: `Error: ${errMessage}` }]);
+        setMessages((prev) =>
+          appendTextRow(prev, {
+            role: 'assistant',
+            text: `Error: ${errMessage}`,
+            isStreaming: false,
+          })
+        );
         setWsError(errMessage);
         setIsLoading(false);
       } finally {
@@ -3511,7 +3527,7 @@ export const DebugDrawer: React.FC<{
         setDynamicVariablesError('');
         // Start every text debug run as a fresh session transcript.
         clearResponseTracking();
-        setMessages([]);
+        setMessages(resetTranscriptRows());
         lastUserFinalRef.current = '';
         // Force a fresh WS session so updated assistant runtime config
         // (voice/model/provider/speed) is applied on session.start.
@@ -3809,7 +3825,7 @@ export const DebugDrawer: React.FC<{
       pendingResolveRef.current = null;
       pendingRejectRef.current = null;
       clearResponseTracking();
-      userDraftIndexRef.current = null;
+      userDraftRowIdRef.current = null;
       lastUserFinalRef.current = '';
       micFrameBufferRef.current = new Uint8Array(0);
       stopPromptVoicePlayback();
@@ -3916,8 +3932,10 @@ export const DebugDrawer: React.FC<{
                 const oldest = interruptedResponseIdsRef.current.values().next().value as string | undefined;
                 if (oldest) interruptedResponseIdsRef.current.delete(oldest);
               }
+              pendingTtfbByResponseIdRef.current.delete(interruptedResponseId);
+              setMessages((prev) => trimInterruptedResponseRows(prev, interruptedResponseId));
             }
-            assistantDraftIndexRef.current = null;
+            assistantDraftRowIdRef.current = null;
             setIsLoading(false);
             stopPlaybackImmediately();
             setAgentState('waiting');
@@ -3934,29 +3952,16 @@ export const DebugDrawer: React.FC<{
               return;
             }
             if (responseId) {
-              const indexed = assistantResponseIndexByIdRef.current.get(responseId);
-              if (typeof indexed === 'number') {
-                setMessages((prev) => {
-                  if (!prev[indexed] || prev[indexed].role !== 'model') return prev;
-                  const next = [...prev];
-                  next[indexed] = { ...next[indexed], ttfbMs };
-                  return next;
-                });
-              } else {
-                pendingTtfbByResponseIdRef.current.set(responseId, ttfbMs);
-              }
+              setMessages((prev) => {
+                const nextRows = attachAssistantTtfb(prev, { responseId, ttfbMs });
+                if (nextRows === prev) {
+                  pendingTtfbByResponseIdRef.current.set(responseId, ttfbMs);
+                }
+                return nextRows;
+              });
               return;
             }
-            setMessages((prev) => {
-              for (let i = prev.length - 1; i >= 0; i -= 1) {
-                if (prev[i]?.role === 'model') {
-                  const next = [...prev];
-                  next[i] = { ...next[i], ttfbMs };
-                  return next;
-                }
-              }
-              return prev;
-            });
+            setMessages((prev) => attachAssistantTtfb(prev, { ttfbMs }));
             return;
           }
 
@@ -3967,24 +3972,35 @@ export const DebugDrawer: React.FC<{
             const toolDisplayName = String(payload?.tool_display_name || toolCall?.displayName || toolName);
             const executor = String(toolCall?.executor || 'server').toLowerCase();
             const rawArgs = String(toolCall?.function?.arguments || '');
-            const argText = rawArgs.length > 160 ? `${rawArgs.slice(0, 160)}...` : rawArgs;
-            setMessages((prev) => [
-              ...prev,
-              {
-                role: 'tool',
-                text: `call ${toolDisplayName} executor=${executor}${argText ? ` args=${argText}` : ''}`,
-              },
-            ]);
-            if (executor === 'client' && toolCallId && ws.readyState === WebSocket.OPEN) {
-              let parsedArgs: Record<string, any> = {};
-              if (rawArgs) {
-                try {
-                  const candidate = JSON.parse(rawArgs);
-                  parsedArgs = candidate && typeof candidate === 'object' ? candidate : {};
-                } catch {
-                  parsedArgs = {};
-                }
+            const turnId = extractTurnId(payload);
+            const utteranceId = extractUtteranceId(payload);
+            const responseId = extractResponseId(payload);
+            let parsedArgsValue: unknown = rawArgs || undefined;
+            if (rawArgs) {
+              try {
+                parsedArgsValue = JSON.parse(rawArgs);
+              } catch {
+                parsedArgsValue = rawArgs;
               }
+            }
+            setMessages((prev) =>
+              upsertToolCallRow(prev, {
+                toolCallId,
+                toolName,
+                toolDisplayName,
+                executor,
+                turnId,
+                utteranceId,
+                responseId,
+                args: parsedArgsValue,
+                rawCall: payload,
+              })
+            );
+            if (executor === 'client' && toolCallId && ws.readyState === WebSocket.OPEN) {
+              const parsedArgs =
+                parsedArgsValue && typeof parsedArgsValue === 'object' && !Array.isArray(parsedArgsValue)
+                  ? (parsedArgsValue as Record<string, any>)
+                  : {};
               const waitForResponseRaw = Boolean(
                 payload?.wait_for_response ?? toolCall?.wait_for_response ?? toolCall?.waitForResponse ?? false
               );
@@ -4252,17 +4268,29 @@ export const DebugDrawer: React.FC<{
 
           if (type === 'assistant.tool_result') {
             const result = payload?.result || {};
+            const toolCallId = String(payload?.tool_call_id || result?.tool_call_id || '').trim();
             const toolName = normalizeToolId(result?.name || 'unknown_tool');
-            const toolDisplayName = String(payload?.tool_display_name || toolName);
+            const toolDisplayName = String(payload?.tool_display_name || result?.tool_display_name || toolName);
             const statusCode = Number(result?.status?.code || 500);
             const statusMessage = String(result?.status?.message || 'error');
             const source = String(payload?.source || 'server');
-            const output = result?.output;
-            const resultText =
-              statusCode === 200
-                ? `result ${toolDisplayName} source=${source} ${JSON.stringify(output)}`
-                : `result ${toolDisplayName} source=${source} status=${statusCode} ${statusMessage}`;
-            setMessages((prev) => [...prev, { role: 'tool', text: resultText }]);
+            const turnId = extractTurnId(payload);
+            const utteranceId = extractUtteranceId(payload);
+            setMessages((prev) =>
+              resolveToolResultRow(prev, {
+                toolCallId,
+                toolName,
+                toolDisplayName,
+                turnId,
+                utteranceId,
+                responseId: extractResponseId(payload),
+                source,
+                status: normalizeToolStatus(statusCode, statusMessage),
+                result: result?.output,
+                error: statusCode >= 200 && statusCode < 300 ? undefined : result?.output ?? statusMessage,
+                rawResult: payload,
+              })
+            );
             return;
           }
 
@@ -4304,17 +4332,17 @@ export const DebugDrawer: React.FC<{
           if (type === 'transcript.delta') {
             const delta = String(payload.text || '');
             if (!delta) return;
+            const turnId = extractTurnId(payload);
+            const utteranceId = extractUtteranceId(payload);
             setMessages((prev) => {
-              const idx = userDraftIndexRef.current;
-              if (idx === null || !prev[idx] || prev[idx].role !== 'user') {
-                const next = [...prev, { role: 'user' as const, text: delta }];
-                userDraftIndexRef.current = next.length - 1;
-                return next;
-              }
-              const next = [...prev];
-              // ASR interim is typically the latest partial text, not a true text delta.
-              next[idx] = { ...next[idx], text: delta };
-              return next;
+              const nextState = updateUserDraftRow(prev, {
+                draftRowId: userDraftRowIdRef.current,
+                text: delta,
+                turnId,
+                utteranceId,
+              });
+              userDraftRowIdRef.current = nextState.draftRowId;
+              return nextState.rows;
             });
             return;
           }
@@ -4322,31 +4350,25 @@ export const DebugDrawer: React.FC<{
           if (type === 'transcript.final') {
             const finalText = String(payload.text || '');
             if (!finalText) {
-              userDraftIndexRef.current = null;
+              userDraftRowIdRef.current = null;
               return;
             }
             if (lastUserFinalRef.current === finalText) {
-              userDraftIndexRef.current = null;
+              userDraftRowIdRef.current = null;
               return;
             }
+            const turnId = extractTurnId(payload);
+            const utteranceId = extractUtteranceId(payload);
             setMessages((prev) => {
-              const idx = userDraftIndexRef.current;
-              userDraftIndexRef.current = null;
-              if (idx !== null && prev[idx] && prev[idx].role === 'user') {
-                const next = [...prev];
-                next[idx] = { ...next[idx], text: finalText || next[idx].text };
-                lastUserFinalRef.current = finalText;
-                return next;
-              }
-              const last = prev[prev.length - 1];
-              if (last?.role === 'user') {
-                const next = [...prev];
-                next[next.length - 1] = { ...last, text: finalText };
-                lastUserFinalRef.current = finalText;
-                return next;
-              }
+              const nextState = finalizeUserDraftRow(prev, {
+                draftRowId: userDraftRowIdRef.current,
+                text: finalText,
+                turnId,
+                utteranceId,
+              });
+              userDraftRowIdRef.current = nextState.draftRowId;
               lastUserFinalRef.current = finalText;
-              return [...prev, { role: 'user', text: finalText }];
+              return nextState.rows;
             });
             return;
           }
@@ -4354,143 +4376,56 @@ export const DebugDrawer: React.FC<{
           if (type === 'assistant.response.delta') {
             const delta = String(payload.text || '');
             if (!delta) return;
+            const turnId = extractTurnId(payload);
+            const utteranceId = extractUtteranceId(payload);
             const responseId = extractResponseId(payload);
             if (responseId && interruptedResponseIdsRef.current.has(responseId)) {
               noteInterruptedDrop(responseId, 'delta');
               return;
             }
             setMessages((prev) => {
-              let idx = assistantDraftIndexRef.current;
-              if (idx === null || !prev[idx] || prev[idx].role !== 'model') {
-                // Tool records can be appended between assistant chunks; recover the
-                // latest model row instead of creating a duplicate assistant row.
-                for (let i = prev.length - 1; i >= 0; i -= 1) {
-                  if (prev[i]?.role === 'model') {
-                    if (
-                      responseId
-                      && prev[i].responseId
-                      && prev[i].responseId !== responseId
-                    ) {
-                      break;
-                    }
-                    idx = i;
-                    assistantDraftIndexRef.current = i;
-                    break;
-                  }
-                  if (prev[i]?.role === 'user') break;
-                }
-              }
-              if (idx === null || !prev[idx] || prev[idx].role !== 'model') {
-                const last = prev[prev.length - 1];
-                if (last?.role === 'model' && last.text === delta) {
-                  return prev;
-                }
-                const nextMessage: DebugTranscriptMessage = { role: 'model' as const, text: delta };
-                if (responseId) {
-                  nextMessage.responseId = responseId;
-                  if (pendingTtfbByResponseIdRef.current.has(responseId)) {
-                    nextMessage.ttfbMs = pendingTtfbByResponseIdRef.current.get(responseId);
-                    pendingTtfbByResponseIdRef.current.delete(responseId);
-                  }
-                }
-                const next = [...prev, nextMessage];
-                assistantDraftIndexRef.current = next.length - 1;
-                if (responseId) {
-                  assistantResponseIndexByIdRef.current.set(responseId, next.length - 1);
-                }
-                return next;
-              }
-              const next = [...prev];
-              const nextMessage = { ...next[idx], text: next[idx].text + delta };
-              if (responseId && !nextMessage.responseId) {
-                nextMessage.responseId = responseId;
-              }
-              if (
-                responseId
-                && typeof nextMessage.ttfbMs !== 'number'
-                && pendingTtfbByResponseIdRef.current.has(responseId)
-              ) {
-                nextMessage.ttfbMs = pendingTtfbByResponseIdRef.current.get(responseId);
+              const pendingTtfb = responseId ? pendingTtfbByResponseIdRef.current.get(responseId) : undefined;
+              const nextState = updateAssistantDeltaRow(prev, {
+                draftRowId: assistantDraftRowIdRef.current,
+                delta,
+                turnId,
+                utteranceId,
+                responseId,
+                ttfbMs: pendingTtfb,
+              });
+              assistantDraftRowIdRef.current = nextState.draftRowId;
+              if (responseId && typeof pendingTtfb === 'number') {
                 pendingTtfbByResponseIdRef.current.delete(responseId);
               }
-              next[idx] = nextMessage;
-              if (responseId) {
-                assistantResponseIndexByIdRef.current.set(responseId, idx);
-              }
-              return next;
+              return nextState.rows;
             });
             return;
           }
 
           if (type === 'assistant.response.final') {
             const finalText = String(payload.text || '');
+            const turnId = extractTurnId(payload);
+            const utteranceId = extractUtteranceId(payload);
             const responseId = extractResponseId(payload);
             if (responseId && interruptedResponseIdsRef.current.has(responseId)) {
               noteInterruptedDrop(responseId, 'final');
               return;
             }
             setMessages((prev) => {
-              let idx = assistantDraftIndexRef.current;
-              assistantDraftIndexRef.current = null;
-              if (idx === null || !prev[idx] || prev[idx].role !== 'model') {
-                for (let i = prev.length - 1; i >= 0; i -= 1) {
-                  if (prev[i]?.role === 'model') {
-                    if (
-                      responseId
-                      && prev[i].responseId
-                      && prev[i].responseId !== responseId
-                    ) {
-                      break;
-                    }
-                    idx = i;
-                    break;
-                  }
-                  if (prev[i]?.role === 'user') break;
-                }
+              const pendingTtfb = responseId ? pendingTtfbByResponseIdRef.current.get(responseId) : undefined;
+              const nextState = finalizeAssistantTextRow(prev, {
+                draftRowId: assistantDraftRowIdRef.current,
+                text: finalText,
+                turnId,
+                utteranceId,
+                responseId,
+                ttfbMs: pendingTtfb,
+              });
+              assistantDraftRowIdRef.current = nextState.draftRowId;
+              if (responseId && typeof pendingTtfb === 'number') {
+                pendingTtfbByResponseIdRef.current.delete(responseId);
               }
-              if (idx !== null && prev[idx] && prev[idx].role === 'model') {
-                const next = [...prev];
-                const nextMessage = { ...next[idx], text: finalText || next[idx].text };
-                if (responseId && !nextMessage.responseId) {
-                  nextMessage.responseId = responseId;
-                }
-                if (
-                  responseId
-                  && typeof nextMessage.ttfbMs !== 'number'
-                  && pendingTtfbByResponseIdRef.current.has(responseId)
-                ) {
-                  nextMessage.ttfbMs = pendingTtfbByResponseIdRef.current.get(responseId);
-                  pendingTtfbByResponseIdRef.current.delete(responseId);
-                }
-                next[idx] = nextMessage;
-                if (responseId) {
-                  assistantResponseIndexByIdRef.current.set(responseId, idx);
-                }
-                return next;
-              }
-              if (!finalText) return prev;
-              const last = prev[prev.length - 1];
-              if (last?.role === 'model') {
-                if (last.text === finalText) return prev;
-                if (finalText.startsWith(last.text) || last.text.startsWith(finalText)) {
-                  const next = [...prev];
-                  next[next.length - 1] = { ...last, text: finalText };
-                  return next;
-                }
-              }
-              const nextMessage: DebugTranscriptMessage = { role: 'model', text: finalText };
-              if (responseId) {
-                nextMessage.responseId = responseId;
-                if (pendingTtfbByResponseIdRef.current.has(responseId)) {
-                  nextMessage.ttfbMs = pendingTtfbByResponseIdRef.current.get(responseId);
-                  pendingTtfbByResponseIdRef.current.delete(responseId);
-                }
-              }
-              const next = [...prev, nextMessage];
-              if (responseId) {
-                assistantResponseIndexByIdRef.current.set(responseId, next.length - 1);
-              }
-              return next;
+              return nextState.rows;
             });
             setIsLoading(false);
             return;
@@ -4521,7 +4456,8 @@ export const DebugDrawer: React.FC<{
         ws.onclose = () => {
           wsReadyRef.current = false;
           setTextSessionStarted(false);
-          userDraftIndexRef.current = null;
+          userDraftRowIdRef.current = null;
+          assistantDraftRowIdRef.current = null;
           stopPlaybackImmediately();
           if (wsStatusRef.current !== 'error') setWsStatus('disconnected');
         };
@@ -5016,7 +4952,7 @@ export const DebugDrawer: React.FC<{
                       <p className="text-xs">暂无对话记录</p>
                     </div>
                   ) : (
-                    <TranscriptionLog scrollRef={scrollRef} messages={messages} isLoading={isLoading} className="pb-4" />
+                    <TranscriptList scrollRef={scrollRef} messages={messages} isLoading={isLoading} className="pb-4" />
                   )}
                 </div>
               </div>