优化: 前端u-agent令牌对齐与组件拆分续批

- 全局样式类(df-sec-h/df-toast族)替换散装实现,主题token去硬编码兜底
- 拆分子组件:ai-chat/queue-panel(队列时钟与编辑随迁)、
  conversation-sidebar/ConversationList、settings/provider-panel
- 父组件死副本清理(队列编辑/时钟/键位表,TS6133清零)并补
  fill-draft父侧转发(重构半成品断链修复)
- 验收:vue-tsc EXIT 0

src/components/ai/CIStatus.vue

@@ -85,7 +85,7 @@ onMounted(async () => {
   border-radius: 8px;
   padding: 8px 12px;
   margin: 8px 0;
-  background: var(--df-bg-secondary);
+  background: var(--df-bg-card);
   font-size: 12px;
 }
 .ci-header {