's'

components/ThemeToggle.tsx

@@ -0,0 +1,37 @@
+"use client"
+
+import { useTheme } from "next-themes"
+import { Button } from "@/components/ui/button"
+import { Moon, Sun } from "lucide-react"
+import { useEffect, useState } from "react"
+
+export function ThemeToggle() {
+  const { theme, setTheme } = useTheme()
+  const [mounted, setMounted] = useState(false)
+
+  // 等待客户端挂载完成
+  useEffect(() => {
+    setMounted(true)
+  }, [])
+
+  // 在客户端挂载完成前不渲染任何内容
+  if (!mounted) {
+    return null
+  }
+
+  return (
+    <Button
+      variant="ghost"
+      size="icon"
+      className="fixed bottom-20 right-4 h-10 w-10 rounded-full shadow-lg hover:shadow-xl transition-all duration-300 bg-primary hover:bg-primary/90"
+      onClick={() => setTheme(theme === "light" ? "dark" : "light")}
+    >
+      {theme === "light" ? (
+        <Moon className="h-[1.2rem] w-[1.2rem] text-white" />
+      ) : (
+        <Sun className="h-[1.2rem] w-[1.2rem] text-white" />
+      )}
+      <span className="sr-only">切换主题</span>
+    </Button>
+  )
+}