fix(channelbridge): IM 发送过滤 action/narration + <p>拆多气泡 + 0.5-2s 间隔

把回复转发给 IM 适配器(sendReply)时剥掉 <action>/<narration> 动作/内心独白(Web 端
才渲染灰斜体，IM 只能收纯文本)，并按 <p> 段落拆成多条气泡分别发送；多气泡发送间隔
随机 0.5~2s(仅 IM，Web 前端不延迟)。新增 sanitize.go stripNarration/splitBubbles/
bubbleGap + 测试。

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

@@ -0,0 +1,80 @@
+import { useState } from "react";
+import { adminChannelTest } from "../../../lib/api";
+import type { ChannelTestResult } from "../../../lib/types";
+import { useAuditStore } from "../../audit";
+import { Button, Surface, Tag } from "../../../components/primitives";
+
+/** Structural identity test (design/08: actor metadata × owner whitelist — never a
+ *  prompt/LLM judgment). Self-contained so the list page and any adapter detail
+ *  page can render it; `defaultPlatform` prefills when known. */
+export function ChannelIdentityTest({
+  defaultPlatform = "",
+  disabled = false,
+}: {
+  defaultPlatform?: string;
+  disabled?: boolean;
+}): React.ReactNode {
+  const log = useAuditStore((s) => s.log);
+  const [platform, setPlatform] = useState(defaultPlatform);
+  const [ownerId, setOwnerId] = useState("");
+  const [group, setGroup] = useState(false);
+  const [verdict, setVerdict] = useState<ChannelTestResult | null>(null);
+  const [testing, setTesting] = useState(false);
+  const [err, setErr] = useState<string | null>(null);
+
+  const test = () => {
+    if (!ownerId.trim()) {
+      setErr("邮箱/账号 id 不能为空");
+      return;
+    }
+    setTesting(true);
+    setErr(null);
+    adminChannelTest({ platform: platform.trim(), accountId: ownerId.trim(), isGroup: group })
+      .then((v) => {
+        log("channel.identity-test", "ok");
+        setVerdict(v);
+      })
+      .catch((e: unknown) => {
+        log("channel.identity-test", "error");
+        setErr(e instanceof Error ? e.message : "身份测试失败");
+      })
+      .finally(() => setTesting(false));
+  };
+
+  return (
+    <Surface gap="sm" className="space-y-3">
+      <h3 className="text-sm font-semibold">身份识别测试（结构性判定 · 绝非提示词）</h3>
+      <p className="text-xs text-[var(--mu-text-lo)]">
+        输入渠道确认的发送者账号 id，后端用 channel 层 actor 元数据 × 主人白名单（configs/users/owner.yaml）判定；判定绝不依赖提示词 / LLM 自我判断。
+      </p>
+      <div className="flex flex-wrap items-center gap-2">
+        <input
+          value={platform}
+          onChange={(e) => setPlatform(e.target.value)}
+          placeholder="platform（如 kook，可留空）"
+          className="min-w-0 flex-1 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)]"
+        />
+        <input
+          value={ownerId}
+          onChange={(e) => setOwnerId(e.target.value)}
+          placeholder="渠道账号 id（发送者 id）"
+          className="min-w-0 flex-1 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)]"
+        />
+        <label className="flex items-center gap-1.5 text-xs text-[var(--mu-text-mid)]">
+          <input type="checkbox" checked={group} onChange={(e) => setGroup(e.target.checked)} className="accent-[var(--mu-accent)]" />
+          群聊
+        </label>
+        <Button variant="primary" disabled={disabled || testing} onClick={test}>
+          测试
+        </Button>
+      </div>
+      {err ? <Tag tone="err">{err}</Tag> : null}
+      {verdict ? (
+        <div className="space-y-1 rounded-[var(--mu-radius)] bg-[var(--mu-surface-2)] px-3 py-2 text-xs text-[var(--mu-text-mid)]">
+          <div>角色：{verdict.role} ｜ 主人：{verdict.owner ? "是" : "否"} ｜ 群聊：{verdict.isGroup ? "是" : "否"} ｜ 环境：{verdict.env}</div>
+          <div>判定：{verdict.verdict}</div>
+        </div>
+      ) : null}
+    </Surface>
+  );
+}