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/channelLogPanel.tsx

@@ -0,0 +1,27 @@
+import { Button } from "../../../components/primitives";
+import { ChannelLogList } from "./channelLogList";
+
+/** Overlay that renders one adapter config's send/receive message log, or the
+ *  adapter overview (adapter == null). Reused by the list page's per-account
+ *  "消息日志" button. */
+export function ChannelLogPanel({ adapter, onClose }: { adapter: string | null; onClose: () => void }): React.ReactNode {
+  return (
+    <div className="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-black/40 p-4 backdrop-blur-sm" onClick={onClose}>
+      <div
+        className="w-full max-w-3xl rounded-[var(--mu-radius-lg)] bg-[var(--mu-surface-1)] shadow-2xl"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="flex items-center gap-2 border-b border-[var(--mu-glass-border)] px-5 py-3">
+          <span className="text-sm font-semibold">消息日志</span>
+          <span className="ml-auto text-xs text-[var(--mu-text-lo)]">弹出视图</span>
+          <Button size="sm" variant="soft" onClick={onClose}>
+            关闭
+          </Button>
+        </div>
+        <div className="max-h-[70vh] overflow-y-auto px-5 py-4">
+          <ChannelLogList adapter={adapter} />
+        </div>
+      </div>
+    </div>
+  );
+}