feat: KOOK自动获取bot身份 + action/narration剥出气泡 + 渠道配置表单回填

agent-116 KOOK token即用+自动获取:
- kook/identity.go: Connect 调 GET /user/me 拿 bot 身份(bot_id/bot_username/bot_nickname), 失败容错
- 渠道列表 enrichAccountsWithBot 附 bot 身份; base_url空用默认/receive_mode默认ws(只填token可跑)

agent-117 action/narration 剥出气泡(主人需求: 动作/旁白不进气泡,按位置上/下):
- parseContent.splitBubble(content)->{body,head,tail}: body=纯文本(去标签), head=开头/中间action/narr(气泡上), tail=结尾(气泡下)
- renderContent 只渲染text(去内联灰斜体); chat.tsx BubbleNotes 泡外 ＊动作/旁白＊ 灰斜体小字(气泡外依附), SplitChatBubble 先剥splitBubble再splitParagraphs(body), <p>/\n\n/毛玻璃/SourceLabel不破坏
- 注: 非chat mode renderContent 现在丢弃action/narr(可接受)

Channels 配置表单回填(修save后输入框空):
- openConfig 从 data.accounts[0].config 回填 token(掩码提示)/base_url/平台字段/黑白名单/限流, 不再硬清空
全仓 build/vet/test绿+前端build绿

frontend/web/src/components/messages/index.tsx

@@ -15,7 +15,7 @@ import { renderContent } from "../../lib/renderContent";
 
 function shell(children: ReactNode): ReactNode {
   return (
-    <div className="rounded-[var(--mu-radius-lg)] border border-[var(--mu-glass-border)] bg-[var(--mu-surface-3)] px-4 py-2.5 text-sm text-[var(--mu-text-hi)]">
+    <div className="liquid-glass-soft rounded-[var(--mu-radius-lg)] px-4 py-2.5 text-sm text-[var(--mu-text-hi)]">
       {children}
     </div>
   );
@@ -116,7 +116,7 @@ export function VisionMessageBody({ message }: { message: ChatMessage }): ReactN
   const hasImage = Boolean(message.image);
   if (!message.content && !message.streaming && !hasImage) return null;
   return (
-    <div className="overflow-hidden rounded-[var(--mu-radius-lg)] border border-[var(--mu-glass-border)] bg-[var(--mu-surface-3)]">
+    <div className="liquid-glass-soft overflow-hidden rounded-[var(--mu-radius-lg)]">
       {hasImage ? (
         <img
           src={message.image as string}
@@ -154,7 +154,7 @@ export function VoiceMessageBody({ message }: { message: ChatMessage }): ReactNo
   }, [message.streaming]);
 
   return (
-    <div className="rounded-[var(--mu-radius-lg)] border border-[var(--mu-glass-border)] bg-[var(--mu-surface-3)] px-4 py-3">
+    <div className="liquid-glass-soft rounded-[var(--mu-radius-lg)] px-4 py-3">
       <div className="flex items-center gap-3">
         <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-[var(--mu-accent)]/15 text-[var(--mu-accent)]">
           <Icon name="mic" size={20} />
@@ -229,6 +229,6 @@ export function modeBody(mode: Mode, message: ChatMessage): ReactNode {
     case "voice": return <VoiceMessageBody message={message} />;
     case "agents": return <AgentsMessageBody message={message} />;
     case "settings": return <SettingsMessageBody message={message} />;
-    default: return <div className="rounded-[var(--mu-radius-lg)] border border-[var(--mu-glass-border)] bg-[var(--mu-surface-3)] px-4 py-2.5 text-sm text-[var(--mu-text-hi)]">{fallbackText(message)}</div>;
+    default: return <div className="liquid-glass-soft rounded-[var(--mu-radius-lg)] px-4 py-2.5 text-sm text-[var(--mu-text-hi)]">{fallbackText(message)}</div>;
   }
 }