feat(channelbridge): 群聊静默窗口合并与回合中续跑（M23）

主人 2026-10-23/24：「要让群聊聊天很自然，很流畅的做法」。群里「一鼓作气打三句」
此前会让她回三次；本片在**每会话车道头部**加一段静默等待，把这几句合成**一轮**回答
（批内每条仍是独立的一条消息，design/15 §2.1 不许拼成一条）。

四条不可走样：

- 🔴 主人私聊**结构性**无窗口：车道分 `newDirectLane`（无 batcher 字段、拿不到定时器
  工厂）与 `newBatchLane`，类型由 actor 元数据（IsOwner() && !IsGroupChat()）决定，
  配置无权翻转；
- 🔴 窗口内零丢失：唯一容器是车道队列（takeAll 单消费者取出），合并阶段无新增丢弃点
  （CoalescedDroppedTotal 恒 0）；超单批上限的**尾部回插队首**保序、锁内、发车前；
- 🔴 一条批 = 一个 turnID = 一次 loop.Run = 一条助手回复；
- 🔴 不改「回什么」：闸门仍逐条跑（prepareInbound 逐字搬运 M22 的 processFrom），
  被静默的消息进不了批。

实现落点：
- lane.go：direct/batch 两种车道 + front（回插队首）+ takeAll + 停机诚实登记；
- coalesce.go：生效参数解析、滑动窗口 + 绝对上限等待、发车原因与计数；
- coalesce_lane.go：攒批 → 拆分 → 陈旧度/闸门 → 发车；
- coalesce_prepare.go / coalesce_batch.go：processFrom 拆成 prepareInbound + runBatch；
- runtimeconfig/channels_coalesce.go：$DATA_DIR/config/coalesce.json（零新 .env 键）；
- gateway/admin_coalesce.go：GET/PUT /api/v1/admin/channels/coalesce（三态补丁 +
  writeAuth + 审计 channels.coalesce + 热生效），routes.go 两行注册（塔已批）；
- 前端：渠道总览页一张卡（六个旋钮；主人私聊只给只读说明，不给开关）。

M22 既有用例仍在（lane_test.go 夹具显式关窗以钉住车道本身）；stranger_test.go 的那条
按塔裁定 #4 改写：「已有回合在跑 ⇒ 只登记不回」变成排队回答（留 WARN，绝不静默）。

回归：go build/vet/test ./... 全绿；三包 -race 全绿；前端 tsc --noEmit + npm run build
+ 渲染测试 36 项通过。不 push、不重启后端、未改 .env 与 Docs/。

frontend/web/src/admin/modules/channels/CoalesceCard.tsx

@@ -0,0 +1,343 @@
+/**
+ * 渠道「静默窗口合并」卡（M23）。真源：internal/services/gateway/admin_coalesce.go。
+ *
+ * 它回答的是主人的原话「要让群聊聊天很自然，很流畅的做法」：群里「一鼓作气打三句」
+ * 不该让她回三次 —— 她在群里等一小段静默，把这几句**合并成一轮**回答（批内每条仍是
+ * 独立的一条消息，绝不拼成一条）。
+ *
+ * 三条口径落在文案里，因为它们是这张卡的产品承诺：
+ *  1. **主人私聊没有这个窗口**：她的私聊一条一条立刻回（`ownerPrivate:"never"` 是后端
+ *     下发的只读事实，面板**不给**开关 —— 那条车道由身份元数据决定，配置翻不开）；
+ *  2. **越界不拒绝、会夹紧**：规则随读下发（`rules`），面板就地校验，后端仍会 clamp
+ *     并留 WARN —— 不让主人白跑，也不假装「你配的数就是生效的数」；
+ *  3. **保存即热生效**：桥每次发车前重读同一份配置，所以 `hot:true` 是事实。
+ *
+ * 呈现与取数分层：`CoalesceCardBody` 只吃状态（渲染测试直接喂 fixture），
+ * `ChannelCoalesceCard` 负责取数 + 表单草稿 + 保存。
+ */
+
+import { useCallback, useEffect, useState } from "react";
+import { request } from "../../../lib/api/core";
+import { Button, Surface, Tag } from "../../../components/primitives";
+import { Notice } from "../../components";
+import { useAuditStore } from "../../audit";
+
+/** 一组窗口参数（后端 AdminCoalescePolicy 的同形投影）。 */
+export interface CoalescePolicyView {
+  enabled: boolean;
+  windowMs: number;
+  maxWaitMs: number;
+  maxBatchMessages: number;
+  applyToStrangers: boolean;
+  strangerWindowMs: number;
+}
+
+/** 取值规则（后端 AdminCoalesceRules）。 */
+export interface CoalesceRules {
+  windowMs: [number, number];
+  maxWaitMs: [number, number];
+  maxBatchMessages: [number, number];
+  clamp: string;
+  flushReasons: string[];
+}
+
+/** GET/PUT 的 data 形状（后端 AdminCoalesceView）。 */
+export interface CoalesceView {
+  path: string;
+  present: boolean;
+  hot: boolean;
+  default: CoalescePolicyView;
+  patch: Record<string, unknown>;
+  conversations: Record<string, CoalescePolicyView>;
+  rules: CoalesceRules;
+  ownerPrivate: string;
+}
+
+/** 表单草稿：一律字符串（输入框的原样值），保存时才转数字。 */
+export interface CoalesceDraft {
+  enabled: string;
+  windowMs: string;
+  maxWaitMs: string;
+  maxBatchMessages: string;
+  applyToStrangers: string;
+  strangerWindowMs: string;
+}
+
+/** 只读事实的文案（渲染测试钉住它必须出现）。 */
+export const OWNER_PRIVATE_NOTE =
+  "主人私聊不受此设置影响：她的私聊没有静默窗口，一条一条立刻回（由身份元数据决定，面板没有开关）";
+
+/** 热生效文案。 */
+export const COALESCE_HOT_LABEL = "已热生效（下一次发车就用新值，不用重启后端）";
+
+/** 字段顺序与中文标签（表单项由它驱动，避免手写六段重复代码）。 */
+export const COALESCE_FIELDS: ReadonlyArray<{
+  key: keyof CoalesceDraft;
+  label: string;
+  kind: "bool" | "int";
+  hint: string;
+}> = [
+  { key: "enabled", label: "启用群聊静默窗口", kind: "bool", hint: "关掉 = 恢复到「到达即回、一条一轮」" },
+  { key: "windowMs", label: "静默窗口（毫秒）", kind: "int", hint: "新消息会重置计时（等她把话说完）" },
+  { key: "maxWaitMs", label: "绝对上限（毫秒）", kind: "int", hint: "从这一批第一条算起，到点必发车" },
+  { key: "maxBatchMessages", label: "单批上限（条）", kind: "int", hint: "超出不是丢弃，是多出来的排成下一批" },
+  { key: "applyToStrangers", label: "对陌生人私聊生效", kind: "bool", hint: "关掉 = 陌生人私聊逐条回" },
+  { key: "strangerWindowMs", label: "陌生人私聊窗口（毫秒）", kind: "int", hint: "仅在「对陌生人私聊生效」时使用" },
+];
+
+/** draftFromView 把生效值铺成草稿。 */
+export function draftFromView(view: CoalesceView): CoalesceDraft {
+  return {
+    enabled: String(view.default.enabled),
+    windowMs: String(view.default.windowMs),
+    maxWaitMs: String(view.default.maxWaitMs),
+    maxBatchMessages: String(view.default.maxBatchMessages),
+    applyToStrangers: String(view.default.applyToStrangers),
+    strangerWindowMs: String(view.default.strangerWindowMs),
+  };
+}
+
+/** parseCoalescePatch 把草稿按**三态**转成补丁：只有与当前生效值不同的键才写。 */
+export function parseCoalescePatch(
+  view: CoalesceView,
+  draft: CoalesceDraft
+): { patch: { default: Record<string, number | boolean> }; errors: Record<string, string>; changed: string[] } {
+  const errors: Record<string, string> = {};
+  const out: Record<string, number | boolean> = {};
+  const changed: string[] = [];
+  const intIn = (key: string, value: string, lo: number, hi: number): number | null => {
+    const trimmed = value.trim();
+    if (!/^\d+$/.test(trimmed)) {
+      errors[key] = "要填整数（毫秒/条）";
+      return null;
+    }
+    const n = Number(trimmed);
+    if (n < lo || n > hi) {
+      errors[key] = `取值范围 ${lo}–${hi}`;
+      return null;
+    }
+    return n;
+  };
+  const window = intIn("windowMs", draft.windowMs, view.rules.windowMs[0], view.rules.windowMs[1]);
+  const maxWait = window === null
+    ? null
+    : intIn("maxWaitMs", draft.maxWaitMs, Math.max(view.rules.maxWaitMs[0], window), view.rules.maxWaitMs[1]);
+  const batch = intIn("maxBatchMessages", draft.maxBatchMessages, view.rules.maxBatchMessages[0], view.rules.maxBatchMessages[1]);
+  const strangerWindow = intIn(
+    "strangerWindowMs",
+    draft.strangerWindowMs,
+    view.rules.windowMs[0],
+    view.rules.windowMs[1]
+  );
+  const enabled = draft.enabled === "true";
+  const applyToStrangers = draft.applyToStrangers === "true";
+  const put = (key: string, next: number | boolean, current: number | boolean): void => {
+    if (next !== current) {
+      out[key] = next;
+      changed.push(key);
+    }
+  };
+  if (window !== null) put("windowMs", window, view.default.windowMs);
+  if (maxWait !== null) put("maxWaitMs", maxWait, view.default.maxWaitMs);
+  if (batch !== null) put("maxBatchMessages", batch, view.default.maxBatchMessages);
+  if (strangerWindow !== null) put("strangerWindowMs", strangerWindow, view.default.strangerWindowMs);
+  put("enabled", enabled, view.default.enabled);
+  put("applyToStrangers", applyToStrangers, view.default.applyToStrangers);
+  return { patch: { default: out }, errors, changed };
+}
+
+/** fetchCoalesce 读一次配置（面板配置面，writeAuth = owner|admin）。 */
+export function fetchCoalesce(): Promise<CoalesceView> {
+  return request<CoalesceView>("/admin/channels/coalesce");
+}
+
+/** saveCoalesce 提交三态补丁（返回**重新读盘**后的真值）。 */
+export function saveCoalesce(patch: { default: Record<string, number | boolean> }): Promise<CoalesceView> {
+  return request<CoalesceView>("/admin/channels/coalesce", {
+    method: "PUT",
+    body: JSON.stringify(patch),
+  });
+}
+
+/** BodyProps 是展示半边的输入（全部状态由外面给，便于直接渲染断言）。 */
+export interface CoalesceBodyProps {
+  view: CoalesceView;
+  draft: CoalesceDraft;
+  errors: Record<string, string>;
+  busy: boolean;
+  receipt: string | null;
+  savedView: CoalesceView | null;
+  onDraftChange: (key: keyof CoalesceDraft, value: string) => void;
+  onSave: () => void;
+}
+
+/** CoalesceCardBody 是展示半边：吃状态、不取数（渲染测试直接喂它）。 */
+export function CoalesceCardBody({
+  view,
+  draft,
+  errors,
+  busy,
+  receipt,
+  savedView,
+  onDraftChange,
+  onSave,
+}: CoalesceBodyProps): React.ReactNode {
+  const hasErrors = Object.keys(errors).length > 0;
+  const inputCls =
+    "w-36 rounded-[var(--mu-radius)] bg-[var(--mu-surface-2)] px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-[var(--mu-accent)]";
+  return (
+    <div className="space-y-3">
+      <div className="flex flex-wrap items-center gap-2">
+        <Tag tone="accent">{COALESCE_HOT_LABEL}</Tag>
+        <span className="font-mono text-[11px] text-[var(--mu-text-lo)]">{view.path}</span>
+        <span className="text-[11px] text-[var(--mu-text-lo)]">
+          {view.present ? "面板配置已存在" : "面板配置还没写过（运行期走代码默认：2.0s / 6s / 24 条）"}
+        </span>
+      </div>
+      <Notice>{OWNER_PRIVATE_NOTE}</Notice>
+      {COALESCE_FIELDS.map((field) => (
+        <div key={field.key} className="space-y-1 rounded-[var(--mu-radius)] bg-[var(--mu-surface-2)]/60 px-3 py-2">
+          <div className="flex flex-wrap items-center gap-2">
+            <span className="min-w-56 text-xs text-[var(--mu-text-hi)]">{field.label}</span>
+            {field.kind === "bool" ? (
+              <select
+                value={draft[field.key]}
+                className="h-9 rounded-[var(--mu-radius)] bg-[var(--mu-surface-2)] px-3 text-sm outline-none focus:ring-1 focus:ring-[var(--mu-accent)]"
+                onChange={(e) => onDraftChange(field.key, e.target.value)}
+              >
+                <option value="true">开</option>
+                <option value="false">关</option>
+              </select>
+            ) : (
+              <input
+                value={draft[field.key]}
+                inputMode="numeric"
+                className={inputCls}
+                onChange={(e) => onDraftChange(field.key, e.target.value)}
+              />
+            )}
+            <span className="font-mono text-[11px] text-[var(--mu-text-lo)]">{field.key}</span>
+          </div>
+          <div className="text-[11px] text-[var(--mu-text-lo)]">{field.hint}</div>
+          {errors[field.key] ? <div className="text-[11px] text-[var(--mu-err)]">⚠ {errors[field.key]}</div> : null}
+        </div>
+      ))}
+      <div className="flex flex-wrap items-center gap-2">
+        <Button variant="primary" disabled={busy || hasErrors} onClick={onSave}>
+          {busy ? "保存中…" : "保存窗口设置"}
+        </Button>
+        {hasErrors ? (
+          <span className="text-[11px] text-[var(--mu-text-lo)]">有坏值，未提交（后端一个字都不会改）</span>
+        ) : null}
+      </div>
+      {receipt ? <Notice>{receipt}</Notice> : null}
+      {savedView ? (
+        <div className="space-y-1 rounded-[var(--mu-radius)] bg-[var(--mu-surface-2)] px-3 py-2 text-[11px]">
+          <span className="text-[var(--mu-text-mid)]">保存后回显（后端重新读盘的真值）：</span>
+          <div className="font-mono text-[var(--mu-text-lo)]">
+            窗口 {savedView.default.windowMs}ms · 上限 {savedView.default.maxWaitMs}ms · 单批{" "}
+            {savedView.default.maxBatchMessages} 条 · {savedView.default.enabled ? "已启用" : "已关闭"}
+          </div>
+          <div className="text-[var(--mu-text-mid)]">{savedView.hot ? COALESCE_HOT_LABEL : "已落盘，但未能热生效"}</div>
+        </div>
+      ) : null}
+      {Object.keys(view.conversations).length > 0 ? (
+        <div className="space-y-1 rounded-[var(--mu-radius)] bg-[var(--mu-surface-2)] px-3 py-2 text-[11px]">
+          <span className="text-[var(--mu-text-mid)]">每会话覆盖（在配置文件里维护，键 = 平台|渠道）：</span>
+          {Object.entries(view.conversations).map(([key, policy]) => (
+            <div key={key} className="font-mono text-[var(--mu-text-lo)]">
+              {key} → {policy.enabled ? "启用" : "关闭"} · 窗口 {policy.windowMs}ms · 单批 {policy.maxBatchMessages} 条
+            </div>
+          ))}
+        </div>
+      ) : null}
+      <p className="text-[11px] text-[var(--mu-text-lo)]">
+        规则：窗口 {view.rules.windowMs[0]}–{view.rules.windowMs[1]}ms、绝对上限 ≥ 窗口且 ≤ {view.rules.maxWaitMs[1]}ms、单批{" "}
+        {view.rules.maxBatchMessages[0]}–{view.rules.maxBatchMessages[1]} 条；越界值由后端夹紧（{view.rules.clamp}）并留日志。
+        发车原因：{view.rules.flushReasons.join(" / ")}。
+      </p>
+    </div>
+  );
+}
+
+/** ChannelCoalesceCard 负责取数、表单草稿与保存。 */
+export function ChannelCoalesceCard(): React.ReactNode {
+  const [view, setView] = useState<CoalesceView | null>(null);
+  const [draft, setDraft] = useState<CoalesceDraft | null>(null);
+  const [errors, setErrors] = useState<Record<string, string>>({});
+  const [busy, setBusy] = useState(false);
+  const [fail, setFail] = useState<string | null>(null);
+  const [receipt, setReceipt] = useState<string | null>(null);
+  const [savedView, setSavedView] = useState<CoalesceView | null>(null);
+  const log = useAuditStore((s) => s.log);
+
+  const reload = useCallback(() => {
+    setFail(null);
+    return fetchCoalesce()
+      .then((next) => {
+        setView(next);
+        setDraft(draftFromView(next));
+      })
+      .catch((e: unknown) => setFail(e instanceof Error ? e.message : "读取窗口配置失败"));
+  }, []);
+
+  useEffect(() => {
+    void reload();
+  }, [reload]);
+
+  const onDraftChange = useCallback((key: keyof CoalesceDraft, value: string) => {
+    setDraft((prev) => (prev ? { ...prev, [key]: value } : prev));
+    setReceipt(null);
+  }, []);
+
+  const onSave = useCallback(() => {
+    if (!view || !draft) return;
+    const check = parseCoalescePatch(view, draft);
+    setErrors(check.errors);
+    if (Object.keys(check.errors).length > 0) return;
+    if (check.changed.length === 0) {
+      setReceipt("没有改动（一个键都没写）");
+      return;
+    }
+    setBusy(true);
+    setFail(null);
+    saveCoalesce(check.patch)
+      .then((next) => {
+        setView(next);
+        setDraft(draftFromView(next));
+        setSavedView(next);
+        setErrors({});
+        setReceipt(`已保存：${check.changed.join(", ")}。${COALESCE_HOT_LABEL}`);
+        log("channels.coalesce", "ok");
+      })
+      .catch((e: unknown) => {
+        setFail(e instanceof Error ? e.message : "保存窗口配置失败");
+        log("channels.coalesce", "error");
+      })
+      .finally(() => setBusy(false));
+  }, [view, draft, log]);
+
+  return (
+    <Surface className="space-y-3">
+      <div className="flex flex-wrap items-center gap-2">
+        <h3 className="text-sm font-semibold">群聊静默窗口合并</h3>
+        <Tag tone="neutral">GET / PUT /api/v1/admin/channels/coalesce</Tag>
+      </div>
+      {fail ? <Notice tone="err">{fail}</Notice> : null}
+      {view === null || draft === null ? (
+        <span className="text-xs text-[var(--mu-text-lo)]">{fail ? "读取失败" : "读取中…"}</span>
+      ) : (
+        <CoalesceCardBody
+          view={view}
+          draft={draft}
+          errors={errors}
+          busy={busy}
+          receipt={receipt}
+          savedView={savedView}
+          onDraftChange={onDraftChange}
+          onSave={onSave}
+        />
+      )}
+    </Surface>
+  );
+}

frontend/web/src/admin/modules/channels/OverviewPage.tsx

@@ -9,6 +9,7 @@ import { PLATFORM_LABEL, PLATFORM_TYPES } from "../channelFields";
 import { adapterNameOf, configuredAccountCount, configuredPlatforms, platformOf } from "./channelUtils";
 import { channelListState, channelStatus } from "./channelStatus";
 import { ChannelLoadError, ChannelStatusTag } from "./channelStatusView";
+import { ChannelCoalesceCard } from "./CoalesceCard";
 import type { AdapterNav } from "./useAdapterNav";
 
 /** Page ① — aggregate all adapters: connection state, message volume, health.
@@ -79,6 +80,9 @@ export function OverviewPage({ navigate }: { navigate: (n: AdapterNav) => void }
           onOpenList={() => navigate({ kind: "page", page: "list" })}
         />
       ) : null}
+
+      {/* 群聊静默窗口合并（M23）：窗口/上限这类调优只该在面板改，不该 SSH 改文件。 */}
+      <ChannelCoalesceCard />
     </div>
   );
 }

frontend/web/src/admin/modules/channels/coalesceCard.render.test.ts

@@ -0,0 +1,140 @@
+// 群聊静默窗口卡（M23）的**真实渲染**测试。
+//
+// 它钉住三件**呈现**的事（逻辑那一半在 CoalesceCard.tsx 的导出函数里）：
+//   ① 六个字段都有中文标签 + 一句人话说明（窗口/上限/单批/陌生人/开关）；
+//   ② 主人私聊**只给一行只读说明**（`ownerPrivate:"never"` 的呈现），**不给开关**；
+//   ③ 越界/非整数就地报错并拦住保存（后端那道 400 仍在，只是不让主人白跑）。
+//
+// 跑法（与 MemoryTidyTuningCard.render.test.ts 同）：
+//
+//   cd frontend/web \
+//     && ./node_modules/.bin/esbuild src/admin/modules/channels/coalesceCard.render.test.ts \
+//          --bundle --platform=node --format=cjs \
+//          --outfile=/tmp/cyrene-coalesce-card.render.test.cjs \
+//     && node /tmp/cyrene-coalesce-card.render.test.cjs
+//
+// `tsc --noEmit` 会对本文件做类型检查，因此它只从项目内导入、不 import node:*。
+
+import { createElement } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import {
+  COALESCE_FIELDS,
+  COALESCE_HOT_LABEL,
+  OWNER_PRIVATE_NOTE,
+  CoalesceCardBody,
+  draftFromView,
+  parseCoalescePatch,
+  type CoalesceView,
+} from "./CoalesceCard";
+
+let checks = 0;
+
+function ok(cond: boolean, what: string): void {
+  checks += 1;
+  if (!cond) throw new Error(`FAILED: ${what}`);
+}
+
+function has(haystack: string, needle: string): boolean {
+  return haystack.includes(needle);
+}
+
+/** fixtureView 造一份 GET 响应形状的数据（代码默认 + 一条会话覆盖）。 */
+function fixtureView(overrides: Partial<CoalesceView> = {}): CoalesceView {
+  return {
+    path: "/data/config/coalesce.json",
+    present: true,
+    hot: true,
+    default: {
+      enabled: true,
+      windowMs: 2000,
+      maxWaitMs: 6000,
+      maxBatchMessages: 24,
+      applyToStrangers: true,
+      strangerWindowMs: 2000,
+    },
+    patch: {},
+    conversations: {
+      "telegram|group:-20": {
+        enabled: false,
+        windowMs: 2000,
+        maxWaitMs: 6000,
+        maxBatchMessages: 24,
+        applyToStrangers: true,
+        strangerWindowMs: 2000,
+      },
+    },
+    rules: {
+      windowMs: [300, 15000],
+      maxWaitMs: [300, 30000],
+      maxBatchMessages: [1, 50],
+      clamp: "clamp",
+      flushReasons: ["quiet", "max_wait", "all_stale", "off", "stop"],
+    },
+    ownerPrivate: "never",
+    ...overrides,
+  };
+}
+
+function render(view: CoalesceView, draftOverride?: Partial<ReturnType<typeof draftFromView>>): string {
+  const draft = { ...draftFromView(view), ...(draftOverride ?? {}) };
+  const check = parseCoalescePatch(view, draft);
+  return renderToStaticMarkup(
+    createElement(CoalesceCardBody, {
+      view,
+      draft,
+      errors: check.errors,
+      busy: false,
+      receipt: null,
+      savedView: null,
+      onDraftChange: () => undefined,
+      onSave: () => undefined,
+    })
+  );
+}
+
+function main(): void {
+  const view = fixtureView();
+  const html = render(view);
+
+  // ① 六个字段的中文标签 + 说明都在，且「主人私聊」只有说明、没有开关。
+  for (const field of COALESCE_FIELDS) {
+    ok(has(html, field.label), `field label missing: ${field.label}`);
+    ok(has(html, field.hint), `field hint missing for ${field.key}`);
+    ok(has(html, field.key), `field key not shown for ${field.key}`);
+  }
+  ok(has(html, OWNER_PRIVATE_NOTE), "owner-private read-only note missing");
+  ok(has(html, "面板没有开关"), "owner-private note must say the panel has no switch for it");
+  ok(has(html, COALESCE_HOT_LABEL), "hot label missing");
+  ok(has(html, "/data/config/coalesce.json"), "config path not shown");
+  ok(has(html, "telegram|group:-20"), "per-conversation override not listed");
+  ok(has(html, "300–15000ms"), "window rules not shown");
+  ok(has(html, "quiet"), "flush reasons not shown");
+
+  // ② 三态补丁：只有改过的键才写；没改 ⇒ 空补丁。
+  const unchanged = parseCoalescePatch(view, draftFromView(view));
+  ok(Object.keys(unchanged.patch.default).length === 0, "unchanged draft must produce an empty patch");
+  ok(unchanged.changed.length === 0, "unchanged draft must report no changed keys");
+
+  const changed = parseCoalescePatch(view, { ...draftFromView(view), windowMs: "3000" });
+  ok(changed.patch.default.windowMs === 3000, "changed window must land in the patch");
+  ok(changed.changed.length === 1, `only the changed key may be written, got ${changed.changed.join(",")}`);
+
+  // ③ 坏值就地报错，且补丁里不含那个键（不会把一半好一半坏的东西发出去）。
+  const bad = parseCoalescePatch(view, { ...draftFromView(view), windowMs: "10", maxBatchMessages: "abc" });
+  ok(bad.errors.windowMs !== undefined, "out-of-range window must be reported");
+  ok(bad.errors.maxBatchMessages !== undefined, "non-numeric batch must be reported");
+  ok(bad.patch.default.windowMs === undefined, "invalid window must not be sent");
+  ok(bad.patch.default.maxBatchMessages === undefined, "invalid batch must not be sent");
+
+  // 绝对上限必须 ≥ 窗口（下层规则由面板现算，不能只信后端）。
+  const waitTooSmall = parseCoalescePatch(view, { ...draftFromView(view), windowMs: "5000", maxWaitMs: "3000" });
+  ok(waitTooSmall.errors.maxWaitMs !== undefined, "maxWait below the window must be rejected");
+
+  const badHtml = render(view, { windowMs: "10" });
+  ok(has(badHtml, "取值范围"), "invalid draft must render an inline error");
+  ok(has(badHtml, "有坏值，未提交"), "invalid draft must block the save button");
+
+  process.stdout.write(`coalesce card render: ${checks} checks passed\n`);
+}
+
+main();