Fix casing discrepancies.

themes/next/components/DarkModeButton.js

@@ -0,0 +1,19 @@
+import { useGlobal } from '@/lib/global'
+import { loadDarkModeFromCookies, saveDarkModeToCookies } from '@/lib/theme'
+
+const DarkModeButton = () => {
+  const { updateDarkMode } = useGlobal()
+  const isDarkMode = loadDarkModeFromCookies()
+
+  // 用户手动设置主题
+  const handleChangeDarkMode = () => {
+    const newTheme = (isDarkMode ? 'dark' : 'light')
+    saveDarkModeToCookies(newTheme)
+    updateDarkMode(newTheme)
+  }
+  return <div className='z-10 duration-200 text-xs cursor-pointer py-1.5 px-1'>
+    <i id='darkModeButton' className={`hover:scale-125 transform duration-200 fas ${isDarkMode ? 'fa-sun' : 'fa-moon'}`}
+       onClick={handleChangeDarkMode} />
+  </div>
+}
+export default DarkModeButton