feat(web): add mobile theme toggle (#274)

packages/ui/package.json

@@ -119,6 +119,7 @@
     "./loading-overlay": "./src/makerkit/loading-overlay.tsx",
     "./profile-avatar": "./src/makerkit/profile-avatar.tsx",
     "./mode-toggle": "./src/makerkit/mode-toggle.tsx",
+    "./mobile-mode-toggle": "./src/makerkit/mobile-mode-toggle.tsx",
     "./enhanced-data-table": "./src/makerkit/data-table.tsx",
     "./language-selector": "./src/makerkit/language-selector.tsx",
     "./stepper": "./src/makerkit/stepper.tsx",

packages/ui/src/makerkit/mobile-mode-toggle.tsx

@@ -0,0 +1,35 @@
+'use client';
+
+import { Moon, Sun } from 'lucide-react';
+import { useTheme } from 'next-themes';
+
+import { cn } from '../lib/utils';
+import { Button } from '../shadcn/button';
+
+export function MobileModeToggle(props: { className?: string }) {
+  const { resolvedTheme, setTheme } = useTheme();
+
+  const toggleTheme = () => {
+    const next = resolvedTheme === 'dark' ? 'light' : 'dark';
+    setTheme(next);
+    setCookieTheme(next);
+  };
+
+  return (
+    <Button
+      variant="ghost"
+      size="icon"
+      aria-label="Toggle theme"
+      className={cn(props.className)}
+      onClick={toggleTheme}
+    >
+      <Sun className="h-[0.9rem] w-[0.9rem] scale-100 rotate-0 transition-all dark:scale-0 dark:-rotate-90" />
+      <Moon className="absolute h-[0.9rem] w-[0.9rem] scale-0 rotate-90 transition-all dark:scale-100 dark:rotate-0" />
+      <span className="sr-only">Toggle theme</span>
+    </Button>
+  );
+}
+
+function setCookieTheme(theme: string) {
+  document.cookie = `theme=${theme}; path=/; max-age=31536000`;
+}