fix: 添加 tab-wisdom 图标文件，修复 gitignore 顺序

- .gitignore: 将 !cfc-frontend/static/*.png 移到 *.png 之后，
  使静态图标 PNG 能被正确追踪
- Add tab-wisdom.png / tab-wisdom-active.png (placeholder from tab-mind)
  Fix TabBar compile error: 'tab-wisdom.png' not found

.gitignore

@@ -44,9 +44,9 @@ coverage/
 worktrees/
 
 # Screenshots
-!cfc-frontend/static/*.png
 *.png
 !docs/**/*.png
+!cfc-frontend/static/*.png
 !cfc-web/public/logo.png
 !web/img/*.png