style: adjust ai tab switch gap and clean up code

- reduce gap in AiTabSwitch styles from 40px to 20px
- format component tags in Discovery page for better readability
- update tab label check in isPanoramaGuideTab from "全景攻略" to "测试-2.0"

src/components/AiTabSwitch/styles/index.scss

@@ -7,7 +7,7 @@
   width: 100%;
   height: 50px;
   display: flex;
-  gap: 40px;
+  gap: 20px;
   overflow: hidden;
 }