feat: add theme toggle component

components/ui/ThemeToggle.tsx

@@ -0,0 +1,25 @@
+"use client";
+
+import { useTheme } from "@wrksz/themes/client";
+import { motion } from "motion/react";
+
+export function ThemeToggle() {
+  const { theme, setTheme } = useTheme();
+
+  return (
+    <motion.button
+      type="button"
+      onClick={() => setTheme(theme === "dark" ? "light" : "dark")}
+      whileHover={{ scale: 1.1 }}
+      whileTap={{ scale: 0.95 }}
+      className="p-2 rounded-lg border border-border bg-canvas text-ink hover:border-ink transition-colors"
+      aria-label="Toggle theme"
+    >
+      {theme === "dark" ? (
+        <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>
+      ) : (
+        <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
+      )}
+    </motion.button>
+  );
+}