fixed hydration error when changing theme and added dynamic default avatar

components/darkmode.tsx

@@ -1,40 +1,46 @@
 "use client";
 
-import * as React from "react";
-import { Moon, Sun } from "lucide-react";
+import React, { useState, useEffect } from "react";
 import { useTheme } from "next-themes";
+import { Moon, Sun } from "lucide-react";
 
-import { Button } from "@/components/ui/button";
-import {
-  DropdownMenu,
-  DropdownMenuContent,
-  DropdownMenuItem,
-  DropdownMenuTrigger,
-} from "@/components/ui/dropdown-menu";
+function DarkToggle() {
+  const [mounted, setMounted] = useState(false);
+  const [isDark, setIsDark] = useState(false);
+  const { theme, setTheme } = useTheme();
 
-export function ModeToggle() {
-  const { setTheme } = useTheme();
+  useEffect(() => {
+    setMounted(true);
+    setIsDark(theme === "dark");
+  }, [theme]);
+
+  if (!mounted) {
+    return null;
+  }
+
+  const toggleDarkMode = () => {
+    setIsDark(!isDark);
+    setTheme(theme === "light" ? "dark" : "light");
+  };
 
   return (
-    <DropdownMenu>
-      <DropdownMenuTrigger asChild>
-        <Button variant="outline" size="icon">
-          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
-          <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
-          <span className="sr-only">Toggle theme</span>
-        </Button>
-      </DropdownMenuTrigger>
-      <DropdownMenuContent align="end">
-        <DropdownMenuItem onClick={() => setTheme("light")}>
-          Light
-        </DropdownMenuItem>
-        <DropdownMenuItem onClick={() => setTheme("dark")}>
-          Dark
-        </DropdownMenuItem>
-        <DropdownMenuItem onClick={() => setTheme("system")}>
-          System
-        </DropdownMenuItem>
-      </DropdownMenuContent>
-    </DropdownMenu>
+    <button
+      onClick={toggleDarkMode}
+      className="flex items-center focus:outline-none"
+    >
+      {isDark ? (
+        <div className="mr-2 text-2xl text-yellow-400">
+          <Moon />
+        </div>
+      ) : (
+        <div className="mr-2 text-2xl text-gray-700">
+          <span className="text-yellow-400">
+            <Sun />
+          </span>
+        </div>
+      )}
+    </button>
   );
 }
+
+export default DarkToggle;