直聊边生成边把回复写入卡片并落盘，方便对照多个模型。

应用上下文后不再停在临时会话；卡片可拖动阅读、盲测时隐藏型号并打乱位置，用户气泡按正文收高。

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

src/direct-chat/turn.ts

@@ -40,6 +40,8 @@ export type DirectChatTurnInput = {
   /** 覆盖当前 API profile */
   profileId?: string | null;
   complete?: boolean;
+  /** 思维链或正文的增量，边生成边回调 */
+  onDelta?: (field: "thinking" | "content", delta: string) => void;
 };
 
 export type DirectChatTurnResult = {
@@ -243,14 +245,22 @@ export async function runDirectChatTurn(
   const trackingRef = { current: {} as LlmTrackingContext };
   try {
     const llm = createTrackedLlm(preset, input.profileId, trackingRef);
-    const result = await llm.complete(buildDirectChatTaskMessages(turnInput), {
+    const messages = buildDirectChatTaskMessages(turnInput);
-      caller: "direct-chat",
+    const callbacks = {
-    });
+      onReasoningDelta: (delta: string) => input.onDelta?.("thinking", delta),
+      onContentDelta: (delta: string) => input.onDelta?.("content", delta),
+    };
+    const result = llm.completeStream
+      ? await llm.completeStream(messages, { caller: "direct-chat" }, callbacks)
+      : await llm.complete(messages, { caller: "direct-chat" });
     const contextTrace = trackingRef.current.pendingContextTrace;
+    const reasoning = result.reasoning ?? null;
+    let reply = result.content ?? "";
+    if (reasoning && reply === reasoning) reply = "";
     return {
       messages: assembled,
-      reply: result.content,
+      reply,
-      reasoning: result.reasoning ?? null,
+      reasoning,
       model: result.model,
       completed: true,
       ...(contextTrace ? { contextTrace } : {}),
@@ -304,6 +314,18 @@ export type DirectChatMultiTurnInput = {
   /** 已落定轮次（不含本轮） */
   turns: DirectChatTurn[];
   complete?: boolean;
+  /** 落盘用的回合 id；流式写入时与中途存档对齐 */
+  turnId?: string;
+  /** 某个窗口的增量 */
+  onDelta?: (event: DirectChatStreamDelta) => void;
+  /** 某个窗口一结束就回调，不必等其余窗口 */
+  onWindow?: (result: DirectChatMultiWindowResult) => void;
+};
+
+export type DirectChatStreamDelta = {
+  windowId: string;
+  field: "thinking" | "content";
+  delta: string;
 };
 
 export type DirectChatMultiWindowResult = {
@@ -342,8 +364,10 @@ export async function runDirectChatMultiTurn(
         presetId: input.presetId,
         profileId: win.profileId,
         complete: input.complete,
+        onDelta: (field, delta) =>
+          input.onDelta?.({ windowId: win.id, field, delta }),
       });
-      return {
+      const result = {
         windowId: win.id,
         profileId: win.profileId,
         reply: single.reply,
@@ -354,6 +378,8 @@ export async function runDirectChatMultiTurn(
         ...(single.skipReason ? { skipReason: single.skipReason } : {}),
         ...(single.error ? { error: single.error } : {}),
       } satisfies DirectChatMultiWindowResult;
+      input.onWindow?.(result);
+      return result;
     }),
   );
 
@@ -367,7 +393,7 @@ export async function runDirectChatMultiTurn(
   }));
 
   const turn: DirectChatTurn = {
-    id: randomUUID(),
+    id: input.turnId || randomUUID(),
     user: { content: message, createdAt: ts },
     replies,
     createdAt: ts,

src/server/direct-chat-handlers.ts

@@ -1,3 +1,4 @@
+import { randomUUID } from "node:crypto";
 import type { IncomingMessage, ServerResponse } from "node:http";
 import {
   createConversation,
@@ -14,8 +15,13 @@ import {
   saveConversation,
   updateConversation,
   updateShell,
+  type DirectChatAssistantReply,
+  type DirectChatConversation,
   type DirectChatMessage,
+  type DirectChatMultiTurnResult,
+  type DirectChatMultiWindowResult,
   type DirectChatShellSlots,
+  type DirectChatStreamDelta,
   type DirectChatTurn,
   type DirectChatWindow,
 } from "../direct-chat/index.js";
@@ -34,6 +40,129 @@ function json(res: ServerResponse, status: number, data: unknown): void {
   res.end(JSON.stringify(data));
 }
 
+function wantsNdjson(req: IncomingMessage): boolean {
+  return String(req.headers.accept || "").includes("application/x-ndjson");
+}
+
+type MultiStreamHooks = {
+  onDelta: (event: DirectChatStreamDelta) => void;
+  onWindow: (result: DirectChatMultiWindowResult) => void;
+};
+
+function replyFromWindowResult(
+  result: DirectChatMultiWindowResult,
+): DirectChatAssistantReply {
+  return {
+    windowId: result.windowId,
+    content: result.reply ?? "",
+    ...(result.reasoning ? { thinking: result.reasoning } : {}),
+    ...(result.model ? { model: result.model } : {}),
+    ...(result.error ? { error: result.error } : {}),
+    ...(result.contextTrace ? { contextTrace: result.contextTrace } : {}),
+  };
+}
+
+/** 流式增量按窗口累加，并定期写入会话，避免刷新后丢掉已生成的正文 */
+function createStreamingSaver(
+  conversation: DirectChatConversation,
+  windows: DirectChatWindow[],
+  text: string,
+  turnId: string,
+) {
+  const ts = new Date().toISOString();
+  const replies: DirectChatAssistantReply[] = [];
+  let timer: ReturnType<typeof setTimeout> | null = null;
+  let closed = false;
+
+  const saveNow = () => {
+    if (timer) {
+      clearTimeout(timer);
+      timer = null;
+    }
+    if (closed) return;
+    const turn: DirectChatTurn = {
+      id: turnId,
+      user: { content: text, createdAt: ts },
+      replies: replies.map((r) => ({ ...r })),
+      createdAt: ts,
+    };
+    saveConversation({
+      ...conversation,
+      windows,
+      turns: [...conversation.turns.filter((t) => t.id !== turnId), turn],
+    });
+  };
+
+  const saveSoon = () => {
+    if (closed || timer) return;
+    timer = setTimeout(() => {
+      timer = null;
+      saveNow();
+    }, 400);
+  };
+
+  return {
+    onDelta(event: DirectChatStreamDelta) {
+      let reply = replies.find((r) => r.windowId === event.windowId);
+      if (!reply) {
+        reply = { windowId: event.windowId, content: "" };
+        replies.push(reply);
+      }
+      if (event.field === "thinking") {
+        reply.thinking = `${reply.thinking || ""}${event.delta}`;
+      } else {
+        reply.content += event.delta;
+      }
+      saveSoon();
+    },
+    onWindow(result: DirectChatMultiWindowResult) {
+      const next = replyFromWindowResult(result);
+      const idx = replies.findIndex((r) => r.windowId === result.windowId);
+      if (idx >= 0) replies[idx] = next;
+      else replies.push(next);
+      saveNow();
+    },
+    close() {
+      closed = true;
+      if (timer) {
+        clearTimeout(timer);
+        timer = null;
+      }
+    },
+  };
+}
+
+async function writeMultiStream(
+  res: ServerResponse,
+  run: (hooks: MultiStreamHooks) => Promise<DirectChatMultiTurnResult>,
+  finish: (multi: DirectChatMultiTurnResult) => Record<string, unknown>,
+): Promise<void> {
+  res.writeHead(200, {
+    "Content-Type": "application/x-ndjson; charset=utf-8",
+    "Cache-Control": "no-cache, no-transform",
+    "X-Accel-Buffering": "no",
+  });
+  const writeEvent = (event: unknown) => {
+    res.write(`${JSON.stringify(event)}\n`);
+  };
+  try {
+    const multi = await run({
+      onDelta: (event) => writeEvent({ type: "delta", ...event }),
+      onWindow: (result) => writeEvent({ type: "window", result }),
+    });
+    writeEvent({ type: "done", multi, ...finish(multi) });
+    res.end();
+  } catch (err) {
+    const error = err instanceof Error ? err.message : String(err);
+    try {
+      writeEvent({ type: "error", error });
+      res.end();
+    } catch {
+      res.destroy();
+    }
+  }
+}
+
 function slotsFromBody(body: Record<string, unknown>): DirectChatShellSlots {
   return {
     systemPrompt:
@@ -269,8 +398,10 @@ export async function handleDirectChatApi(
           json(res, 400, { error: "请先新增至少一个模型窗口" });
           return true;
         }
-        try {
+        const turnId = randomUUID();
-          const multi = await runDirectChatMultiTurn({
+        const saver = createStreamingSaver(conversation, windows, text, turnId);
+        const run = (hooks?: MultiStreamHooks) =>
+          runDirectChatMultiTurn({
             message: text,
             slots: {
               systemPrompt: shell.systemPrompt,
@@ -283,11 +414,41 @@ export async function handleDirectChatApi(
             windows,
             turns: conversation.turns,
             complete: body.complete,
+            turnId,
+            onDelta: (event) => {
+              saver.onDelta(event);
+              hooks?.onDelta(event);
+            },
+            onWindow: (result) => {
+              saver.onWindow(result);
+              hooks?.onWindow(result);
+            },
           });
+        try {
+          if (wantsNdjson(req)) {
+            await writeMultiStream(res, run, (multi) => {
+              saver.close();
               const updated = saveConversation({
                 ...conversation,
                 windows,
-            turns: [...conversation.turns, multi.turn],
+                turns: [
+                  ...conversation.turns.filter((t) => t.id !== multi.turn.id),
+                  multi.turn,
+                ],
+              });
+              return { conversation: updated, shell };
+            });
+            return true;
+          }
+          const multi = await run();
+          saver.close();
+          const updated = saveConversation({
+            ...conversation,
+            windows,
+            turns: [
+              ...conversation.turns.filter((t) => t.id !== multi.turn.id),
+              multi.turn,
+            ],
           });
           json(res, 200, {
             conversation: updated,
@@ -355,8 +516,8 @@ export async function handleDirectChatApi(
         json(res, 400, { error: "请先新增至少一个模型窗口" });
         return true;
       }
-      try {
+      const run = (hooks?: MultiStreamHooks) =>
-        const multi = await runDirectChatMultiTurn({
+        runDirectChatMultiTurn({
           message: text,
           slots: slotsFromBody(body),
           presetId:
@@ -368,7 +529,15 @@ export async function handleDirectChatApi(
           windows,
           turns,
           complete: body.complete,
+          onDelta: hooks?.onDelta,
+          onWindow: hooks?.onWindow,
         });
+      try {
+        if (wantsNdjson(req)) {
+          await writeMultiStream(res, run, () => ({}));
+          return true;
+        }
+        const multi = await run();
         json(res, 200, { multi });
       } catch (err) {
         json(res, 400, {

web/chat.css

@@ -153,40 +153,33 @@
 }
 
 .chat-room {
+  position: relative;
   display: flex;
   flex-direction: column;
   min-height: 0;
   flex: 1;
 }
 
-.chat-room-head {
+.chat-temp-mark {
+  position: absolute;
+  inset: 0 0 88px;
+  z-index: 2;
   display: flex;
   align-items: flex-start;
-  justify-content: space-between;
+  justify-content: center;
-  gap: 12px;
+  padding-top: 11vh;
-  padding: 12px 16px;
-  border-bottom: 1px solid var(--st-border);
-  background: var(--st-surface);
-}
-
-.chat-room-titles h2 {
   margin: 0;
-  font-size: 16px;
+  pointer-events: none;
-  font-weight: 650;
+  font-family: var(--st-font-read);
+  font-size: clamp(28px, 4vw, 42px);
+  font-weight: 600;
+  letter-spacing: 0.12em;
+  color: color-mix(in srgb, var(--st-text) 14%, transparent);
+  user-select: none;
 }
 
-.chat-room-sub {
+.chat-temp-mark[hidden] {
-  margin: 4px 0 0;
+  display: none;
-  font-size: 12px;
-  color: var(--st-muted);
-}
-
-.chat-room-actions {
-  display: flex;
-  flex-wrap: wrap;
-  align-items: center;
-  justify-content: flex-end;
-  gap: 6px;
 }
 
 .chat-profile-label {
@@ -276,22 +269,147 @@
   padding-top: 4px;
 }
 
-/* —— 模型竞技场：并排整列 chat pane —— */
+/* —— 模型竞技场：用户气泡 + 横向回复卡片 —— */
 .chat-arena {
+  position: relative;
+  z-index: 1;
   flex: 1;
   min-height: 0;
-  display: grid;
+  display: flex;
-  grid-auto-flow: column;
+  flex-direction: column;
-  grid-auto-columns: minmax(280px, 1fr);
+  overflow: hidden;
-  gap: 0;
+  background: transparent;
-  overflow-x: auto;
-  overflow-y: hidden;
-  background: var(--st-bg);
   border-bottom: 1px solid var(--st-border);
 }
 
+.chat-arena.is-empty {
+  align-items: center;
+  justify-content: center;
+  border-bottom: 0;
+}
+
+.chat-add-card {
+  position: relative;
+  z-index: 3;
+  width: min(280px, 70%);
+  height: min(360px, 62%);
+  min-height: 180px;
+  border: 1px dashed var(--st-border-strong);
+  border-radius: 12px;
+  background: color-mix(in srgb, var(--st-surface) 72%, transparent);
+  color: color-mix(in srgb, var(--st-text) 28%, transparent);
+  font: inherit;
+  font-size: 64px;
+  font-weight: 400;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.chat-add-card:hover,
+.chat-add-card:focus-visible {
+  border-color: var(--st-accent);
+  color: var(--st-accent);
+  background: var(--st-accent-soft);
+  outline: none;
+}
+
+.chat-composer-row {
+  display: flex;
+  align-items: flex-end;
+  gap: 8px;
+  min-width: 0;
+}
+
+.chat-more {
+  position: relative;
+  align-self: center;
+  flex: 0 0 auto;
+}
+
+.chat-more[hidden] {
+  display: none !important;
+}
+
+.chat-composer:has(.chat-more[open]) {
+  z-index: 6;
+}
+
+.chat-more-sum {
+  list-style: none;
+  cursor: pointer;
+  user-select: none;
+  box-sizing: border-box;
+  width: 32px;
+  height: 32px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 1px solid transparent;
+  border-radius: 8px;
+  background: transparent;
+  color: var(--st-muted);
+}
+
+.chat-more-sum::-webkit-details-marker {
+  display: none;
+}
+
+.chat-more-sum::marker {
+  content: "";
+}
+
+.chat-more-sum:hover,
+.chat-more[open] > .chat-more-sum {
+  color: var(--st-accent);
+  background: var(--st-accent-soft);
+  border-color: transparent;
+}
+
+.hamburger-icon {
+  display: block;
+  width: 14px;
+  height: 11px;
+  background:
+    linear-gradient(currentColor, currentColor) 0 0 / 100% 1.5px no-repeat,
+    linear-gradient(currentColor, currentColor) 0 50% / 100% 1.5px no-repeat,
+    linear-gradient(currentColor, currentColor) 0 100% / 100% 1.5px no-repeat;
+}
+
+.chat-more-panel {
+  position: absolute;
+  left: 0;
+  bottom: calc(100% + 6px);
+  z-index: 8;
+  min-width: 168px;
+  padding: 4px;
+  border: 1px solid var(--st-border);
+  border-radius: 8px;
+  background: var(--st-surface);
+  box-shadow: 0 12px 32px color-mix(in srgb, var(--st-text) 14%, transparent);
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+}
+
+.chat-more-item {
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--st-text);
+  font: inherit;
+  font-size: 13px;
+  text-align: left;
+  padding: 7px 10px;
+  cursor: pointer;
+}
+
+.chat-more-item:hover,
+.chat-more-item:focus-visible {
+  background: var(--st-accent-soft);
+  outline: none;
+}
+
 .chat-arena-empty {
-  grid-column: 1 / -1;
   margin: auto;
   padding: 24px 16px;
   text-align: center;
@@ -301,42 +419,241 @@
   max-width: 28rem;
 }
 
-.chat-arena-col {
+.chat-arena-stream {
+  flex: 1;
+  min-height: 0;
+  overflow-x: hidden;
+  overflow-y: auto;
+  padding: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 22px;
+  scrollbar-width: none;
+}
+
+.chat-arena-stream::-webkit-scrollbar {
+  width: 0;
+  height: 0;
+}
+
+.chat-arena-idle {
+  margin: 0;
+  padding: 8px 0 0;
+  text-align: center;
+  color: var(--st-faint);
+  font-size: 13px;
+  line-height: 1.5;
+}
+
+.chat-turn {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  min-width: 0;
+}
+
+.chat-user-row {
+  display: flex;
+  justify-content: flex-end;
+  align-items: flex-start;
+  flex: 0 0 auto;
+  min-height: 0;
+}
+
+.chat-user-bubble {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end;
+  gap: 2px;
+  width: fit-content;
+  max-width: min(92%, 42rem);
+  min-height: 0;
+  height: auto;
+  box-sizing: border-box;
+  padding: 8px 12px 6px;
+  border-radius: 14px;
+  border-bottom-right-radius: 4px;
+  border: 1px solid #93c5fd;
+  background: linear-gradient(180deg, #eff6ff 0%, #dbeafe 100%);
+  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
+  color: #1e293b;
+}
+
+.chat-user-body {
+  width: 100%;
+  white-space: pre-wrap;
+  word-break: break-word;
+  line-height: 1.55;
+  font-size: 14px;
+}
+
+.chat-bubble-time {
+  font-size: 10px;
+  line-height: 1.2;
+  color: #64748b;
+}
+
+.chat-strip-bar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  min-height: 28px;
+}
+
+.chat-strip-hint {
+  font-size: 11px;
+  color: var(--st-faint);
+}
+
+.chat-strip-nav {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.chat-strip-idx {
+  min-width: 3.2rem;
+  text-align: center;
+  font-size: 11px;
+  font-variant-numeric: tabular-nums;
+  color: var(--st-muted);
+}
+
+.chat-nav-btn {
+  width: 28px;
+  height: 28px;
+  border: 1px solid transparent;
+  border-radius: 8px;
+  background: transparent;
+  color: var(--st-muted);
+  font: inherit;
+  font-size: 14px;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.chat-nav-btn:hover,
+.chat-nav-btn:focus-visible {
+  color: var(--st-accent);
+  background: var(--st-accent-soft);
+  outline: none;
+}
+
+.chat-nav-btn:disabled {
+  opacity: 0.35;
+  cursor: default;
+  background: transparent;
+  color: var(--st-faint);
+}
+
+.chat-reply-track {
+  --card-gap: 10px;
+  --card-peek: 36px;
+  --card-min-h: 120px;
+  display: flex;
+  align-items: flex-start;
+  gap: var(--card-gap);
+  overflow-x: auto;
+  padding-bottom: 2px;
+  cursor: grab;
+  scrollbar-width: none;
+  touch-action: none;
+  overscroll-behavior-x: contain;
+}
+
+.chat-reply-track::-webkit-scrollbar {
+  display: none;
+}
+
+.chat-reply-track.is-dragging,
+.chat-reply-track.is-dragging * {
+  cursor: grabbing;
+  user-select: none;
+  -webkit-user-select: none;
+}
+
+.chat-reply-card {
+  flex: 0 0 calc((100% - var(--card-gap) - var(--card-peek)) / 2);
+  width: calc((100% - var(--card-gap) - var(--card-peek)) / 2);
   display: flex;
   flex-direction: column;
   min-width: 0;
-  min-height: 0;
+  min-height: var(--card-min-h);
-  border-right: 1px solid var(--st-border);
+  border: 1px solid var(--st-border);
+  border-radius: 8px;
   background: var(--st-surface);
 }
 
-.chat-arena-col:last-child {
+.chat-reply-track[data-count="1"] .chat-reply-card {
-  border-right: 0;
+  flex-basis: 100%;
+  width: 100%;
 }
 
-.chat-arena-col.is-selected {
+.chat-reply-card.is-collapsed {
+  overflow: hidden;
+}
+
+.chat-reply-card.is-collapsed .chat-reply-card-body {
+  flex: 1 1 auto;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.chat-reply-card.is-collapsed .chat-reply-card-text {
+  flex: 1 1 auto;
+  min-height: 0;
+  height: 100%;
+  overflow-x: hidden;
+  overflow-y: auto;
+  scrollbar-width: none;
+}
+
+.chat-reply-card.is-collapsed .chat-reply-card-text::-webkit-scrollbar {
+  width: 0;
+}
+
+.chat-reply-card-text.is-vscroll,
+.chat-arena-stream.is-vscroll {
+  scrollbar-width: thin;
+  scrollbar-color: color-mix(in srgb, var(--st-muted) 42%, transparent) transparent;
+}
+
+.chat-reply-card-text.is-vscroll::-webkit-scrollbar,
+.chat-arena-stream.is-vscroll::-webkit-scrollbar {
+  width: 6px;
+}
+
+.chat-reply-card-text.is-vscroll::-webkit-scrollbar-thumb,
+.chat-arena-stream.is-vscroll::-webkit-scrollbar-thumb {
+  background: color-mix(in srgb, var(--st-muted) 45%, transparent);
+  border-radius: 99px;
+}
+
+.chat-reply-card.is-selected {
+  border-color: var(--st-accent);
   background: color-mix(in srgb, var(--st-accent-soft) 55%, var(--st-surface));
 }
 
-.chat-arena-col-head {
+.chat-reply-card.is-error {
+  border-color: color-mix(in srgb, var(--st-danger) 45%, var(--st-border));
+}
+
+.chat-reply-card-head {
   flex-shrink: 0;
   display: flex;
   align-items: center;
   justify-content: space-between;
   gap: 8px;
-  padding: 8px 12px;
+  padding: 8px 10px;
   border-bottom: 1px solid var(--st-border);
-  background: color-mix(in srgb, var(--st-bg) 55%, var(--st-surface));
-  position: sticky;
-  top: 0;
-  z-index: 1;
 }
 
-.chat-arena-col-titles {
+.chat-reply-card-titles {
   min-width: 0;
 }
 
-.chat-arena-col-name {
+.chat-reply-card-name {
   display: block;
   font-size: 13px;
   font-weight: 650;
@@ -346,7 +663,7 @@
   white-space: nowrap;
 }
 
-.chat-arena-col-model {
+.chat-reply-card-model {
   display: block;
   margin-top: 1px;
   font-size: 11px;
@@ -356,64 +673,158 @@
   white-space: nowrap;
 }
 
-.chat-arena-col-actions {
+.chat-reply-card-body {
-  display: flex;
+  flex: 1 1 auto;
-  align-items: center;
-  gap: 4px;
-  flex-shrink: 0;
-}
-
-.chat-arena-col-actions .st-btn {
-  padding: 4px 8px;
-  font-size: 12px;
-}
-
-.chat-arena-col-scroll {
-  flex: 1;
   min-height: 0;
-  overflow: auto;
-  padding: 12px;
   display: flex;
   flex-direction: column;
-  gap: 10px;
+  padding: 10px;
+  font-size: 13px;
+  line-height: 1.55;
+  word-break: break-word;
 }
 
-.chat-bubble {
+.chat-reply-card-body.is-error {
-  max-width: 100%;
+  color: var(--st-danger);
+}
+
+.chat-reply-card-body.is-pending {
+  color: var(--st-faint);
+}
+
+.chat-reply-card-text {
+  min-width: 0;
+}
+
+.chat-reply-card-text .md-p {
+  margin: 0 0 0.55em;
+  line-height: 1.55;
+}
+
+.chat-reply-card-text .md-p:last-child {
+  margin-bottom: 0;
+}
+
+.chat-reply-card-text .md-h {
+  margin: 0.7em 0 0.35em;
+  font-weight: 650;
+  line-height: 1.35;
+}
+
+.chat-reply-card-text .md-h:first-child {
+  margin-top: 0;
+}
+
+.chat-reply-card-text h1.md-h { font-size: 1.25em; }
+.chat-reply-card-text h2.md-h { font-size: 1.15em; }
+.chat-reply-card-text h3.md-h,
+.chat-reply-card-text h4.md-h,
+.chat-reply-card-text h5.md-h,
+.chat-reply-card-text h6.md-h { font-size: 1.05em; }
+
+.chat-reply-card-text .md-ul,
+.chat-reply-card-text .md-ol {
+  margin: 0.35em 0 0.55em;
+  padding-left: 1.35em;
+}
+
+.chat-reply-card-text .md-quote {
+  margin: 0.45em 0;
+  padding: 0.15em 0 0.15em 0.75em;
+  border-left: 3px solid color-mix(in srgb, var(--st-accent) 45%, var(--st-border));
+  color: var(--st-muted);
+}
+
+.chat-reply-card-text .md-pre {
+  margin: 0.45em 0;
   padding: 8px 10px;
+  overflow-x: hidden;
+  overflow-wrap: anywhere;
+  word-break: break-word;
+  white-space: pre-wrap;
   border-radius: 8px;
   border: 1px solid var(--st-border);
-  background: var(--st-bg);
+  background: color-mix(in srgb, var(--st-bg) 80%, var(--st-surface));
-  white-space: pre-wrap;
+  font-size: 12px;
-  word-break: break-word;
+  line-height: 1.45;
-  line-height: 1.5;
-  font-size: 13px;
 }
 
-.chat-bubble.user {
+.chat-reply-card-text .md-code {
-  align-self: stretch;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
-  background: color-mix(in srgb, var(--st-accent-soft) 70%, var(--st-bg));
+  font-size: 0.92em;
-  border-color: color-mix(in srgb, var(--st-accent) 28%, var(--st-border));
+  padding: 0.05em 0.35em;
+  border-radius: 4px;
+  background: color-mix(in srgb, var(--st-bg) 70%, var(--st-surface));
 }
 
-.chat-bubble.assistant {
+.chat-reply-card-text .md-a {
-  align-self: stretch;
+  color: var(--st-accent);
-  background: var(--st-surface);
+  text-decoration: underline;
+  text-underline-offset: 2px;
 }
 
-.chat-bubble.assistant.is-selected {
+.chat-reply-card-text .md-hr {
-  border-color: var(--st-accent);
+  border: none;
-  background: var(--st-accent-soft);
+  border-top: 1px solid var(--st-border);
+  margin: 0.75em 0;
 }
 
-.chat-bubble-foot {
+.chat-reply-card-text .md-table-wrap {
+  margin: 0.55em 0;
+  overflow-x: auto;
+}
+
+.chat-reply-card-text .md-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.92em;
+  line-height: 1.45;
+}
+
+.chat-reply-card-text .md-table th,
+.chat-reply-card-text .md-table td {
+  border: 1px solid var(--st-border);
+  padding: 0.35em 0.55em;
+  text-align: left;
+  vertical-align: top;
+}
+
+.chat-reply-card-text .md-table th {
+  font-weight: 650;
+  background: color-mix(in srgb, var(--st-surface) 88%, var(--st-accent));
+}
+
+.chat-reply-card-foot {
+  flex-shrink: 0;
   display: flex;
   align-items: center;
   justify-content: flex-end;
-  gap: 6px;
+  gap: 8px;
-  margin-top: 6px;
+  padding: 0 10px 8px;
 }
 
+.chat-reply-card-foot:not(:has(button:not([hidden]), .chat-select-btn.is-on)) {
+  display: none;
+}
+
+.chat-expand-btn {
+  margin-right: auto;
+  border: 0;
+  background: transparent;
+  color: var(--st-muted);
+  font: inherit;
+  font-size: 12px;
+  padding: 4px 0;
+  cursor: pointer;
+}
+
+.chat-expand-btn:hover,
+.chat-expand-btn:focus-visible {
+  color: var(--st-accent);
+  outline: none;
+}
+
+.chat-remove-btn,
 .chat-select-btn {
   border: 1px solid var(--st-border-strong);
   border-radius: 6px;
@@ -426,9 +837,13 @@
   cursor: pointer;
 }
 
-.chat-select-btn:hover {
+.chat-remove-btn:hover,
+.chat-select-btn:hover,
+.chat-remove-btn:focus-visible,
+.chat-select-btn:focus-visible {
   border-color: var(--st-accent);
   background: var(--st-accent-soft);
+  outline: none;
 }
 
 .chat-select-btn.is-on {
@@ -438,44 +853,6 @@
   font-weight: 650;
 }
 
-.chat-arena-col-empty {
-  margin: auto;
-  padding: 16px 8px;
-  text-align: center;
-  color: var(--st-faint);
-  font-size: 12px;
-  line-height: 1.4;
-}
-
-.chat-bubble-meta {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 8px;
-  margin-bottom: 6px;
-  font-size: 11px;
-  color: var(--st-muted);
-}
-
-.chat-bubble-actions {
-  display: flex;
-  gap: 4px;
-}
-
-.chat-bubble-actions button {
-  border: 0;
-  background: transparent;
-  color: var(--st-muted);
-  cursor: pointer;
-  font: inherit;
-  font-size: 11px;
-  padding: 0 4px;
-}
-
-.chat-bubble-actions button:hover {
-  color: var(--st-accent);
-}
-
 .chat-bubble-thinking {
   margin: 0 0 8px;
   padding: 8px;
@@ -483,10 +860,11 @@
   background: color-mix(in srgb, var(--st-bg) 80%, transparent);
   color: var(--st-muted);
   font-size: 12px;
-  white-space: pre-wrap;
 }
 
 .chat-composer {
+  position: relative;
+  z-index: 1;
   padding: 10px 16px 14px;
   border-top: 1px solid var(--st-border);
   background: var(--st-surface);
@@ -496,6 +874,8 @@
 
 .chat-input-shell {
   position: relative;
+  flex: 1 1 auto;
+  min-width: 0;
   display: flex;
   align-items: flex-end;
   gap: 8px;
@@ -593,6 +973,10 @@
   color: var(--st-danger);
 }
 
+.st-btn[hidden] {
+  display: none !important;
+}
+
 .st-btn {
   display: inline-flex;
   align-items: center;
@@ -764,4 +1148,13 @@
   .chat-main {
     min-height: 42vh;
   }
+
+  .chat-reply-track {
+    --card-peek: 48px;
+  }
+
+  .chat-reply-track:not([data-count="1"]) .chat-reply-card {
+    flex-basis: calc(100% - var(--card-peek));
+    width: calc(100% - var(--card-peek));
+  }
 }

web/chat.html

@@ -37,6 +37,9 @@
           <button type="button" class="st-btn" id="btn-new-conv" hidden>
             新建会话
           </button>
+          <button type="button" class="st-btn" id="btn-save-temp" hidden>
+            保存
+          </button>
         </div>
         <div class="chat-rail-list" id="chat-rail-list"></div>
         <p class="chat-rail-note">
@@ -46,30 +49,23 @@
 
       <main class="chat-main" id="chat-main">
         <section class="chat-room" id="chat-room">
-          <header class="chat-room-head">
+          <p class="chat-temp-mark" id="chat-temp-mark" hidden>临时会话</p>
-            <div class="chat-room-titles">
-              <h2 id="chat-room-title">临时会话</h2>
-              <p class="chat-room-sub" id="chat-room-sub">未选存档时即快速对话</p>
-            </div>
-            <div class="chat-room-actions">
-              <button type="button" class="st-btn" id="btn-save-temp" hidden>
-                保存
-              </button>
-              <button type="button" class="st-btn" id="btn-add-window">
-                新增窗口
-              </button>
-            </div>
-          </header>
-
           <div class="chat-arena" id="chat-arena" aria-live="polite" aria-label="模型竞技场"></div>
 
           <footer class="chat-composer">
             <p class="chat-status" id="chat-status" hidden></p>
+            <div class="chat-composer-row">
+              <details class="chat-more" id="chat-more">
+                <summary class="chat-more-sum" title="更多操作" aria-label="更多操作">
+                  <span class="hamburger-icon" aria-hidden="true"></span>
+                </summary>
+                <div class="chat-more-panel" id="chat-more-panel" role="menu"></div>
+              </details>
             <div class="chat-input-shell">
               <textarea
                 id="chat-input"
                 rows="1"
-                placeholder="输入消息，Enter 发送（所有窗口同时回复），Shift+Enter 换行"
+                placeholder="输入消息，Enter 发送（所有模型同时回复），Shift+Enter 换行"
               ></textarea>
               <div class="chat-shell-actions">
                 <button
@@ -85,6 +81,7 @@
                 </button>
               </div>
             </div>
+            </div>
           </footer>
         </section>
       </main>
@@ -159,7 +156,7 @@
     <dialog class="chat-dialog" id="dialog-add-window">
       <form method="dialog" id="form-add-window">
         <h3>新增窗口</h3>
-        <p class="chat-dialog-hint">选一个 API 配置，中间多开一列对照窗；发送时各列同时回复。</p>
+        <p class="chat-dialog-hint">选一个 API 配置，新增对照模型；发送时各模型同时回复。</p>
         <label>
           模型配置
           <select id="add-window-profile"></select>