refactor: repartition server-side and client-side code

app/.client/components/ui/ThemeSwitch.tsx

@@ -0,0 +1,36 @@
+import { useStore } from '@nanostores/react';
+import { AnimatePresence, motion } from 'framer-motion';
+import { memo, useEffect, useState } from 'react';
+import { cubicEasingFn } from '~/.client/utils/easings';
+import { themeStore, toggleTheme } from '~/stores/theme';
+import { IconButton } from './IconButton';
+
+interface ThemeSwitchProps {
+  className?: string;
+}
+
+export const ThemeSwitch = memo(({ className }: ThemeSwitchProps) => {
+  const theme = useStore(themeStore);
+  const [domLoaded, setDomLoaded] = useState(false);
+
+  useEffect(() => {
+    setDomLoaded(true);
+  }, []);
+
+  return (
+    domLoaded && (
+      <IconButton className={className} title="切换主题" onClick={toggleTheme}>
+        <AnimatePresence mode="wait" initial={false}>
+          <motion.div
+            key={theme}
+            initial={{ rotateZ: -30, opacity: 0 }}
+            animate={{ rotateZ: 0, opacity: 1 }}
+            exit={{ rotateZ: 30, opacity: 0 }}
+            transition={{ duration: 0.3, ease: cubicEasingFn }}
+            className={theme === 'dark' ? 'i-mingcute:sun-line text-xl' : 'i-mingcute:moon-line text-xl'}
+          />
+        </AnimatePresence>
+      </IconButton>
+    )
+  );
+});