feat: add support for light mode (#438)

* feat: add support for light mode

* refactor: use shadcn theme toggle

* fix: fix sonner

Author: steveiliop56

frontend/bun.lock

@@ -12,7 +12,7 @@
     <link rel="manifest" href="/site.webmanifest" />
     <title>Tinyauth</title>
   </head>
-  <body class="dark">
+  <body>
     <div id="root"></div>
     <script type="module" src="/src/main.tsx"></script>
   </body>

frontend/index.html

@@ -7,10 +7,12 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "tsc": "tsc -b"
   },
   "dependencies": {
     "@hookform/resolvers": "^5.2.2",
+    "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-label": "^2.1.7",
     "@radix-ui/react-select": "^2.2.6",
     "@radix-ui/react-separator": "^1.1.7",
@@ -54,4 +56,4 @@
     "typescript-eslint": "^8.46.1",
     "vite": "^7.1.10"
   }
-}
+}

frontend/package.json

@@ -18,9 +18,10 @@ export const LanguageSelector = () => {
     setLanguage(option as SupportedLanguage);
     i18n.changeLanguage(option as SupportedLanguage);
   };
+
   return (
     <Select onValueChange={handleSelect} value={language}>
-      <SelectTrigger className="absolute top-5 right-5">
+      <SelectTrigger>
         <SelectValue placeholder="Select language" />
       </SelectTrigger>
       <SelectContent>

frontend/src/components/language/language.tsx

@@ -3,6 +3,7 @@ import { LanguageSelector } from "../language/language";
 import { Outlet } from "react-router";
 import { useCallback, useEffect, useState } from "react";
 import { DomainWarning } from "../domain-warning/domain-warning";
+import { ThemeToggle } from "../theme-toggle/theme-toggle";
 
 const BaseLayout = ({ children }: { children: React.ReactNode }) => {
   const { backgroundImage, title } = useAppContext();
@@ -20,7 +21,10 @@ const BaseLayout = ({ children }: { children: React.ReactNode }) => {
         backgroundPosition: "center",
       }}
     >
-      <LanguageSelector />
+      <div className="absolute top-5 right-5 flex flex-row gap-2">
+        <ThemeToggle />
+        <LanguageSelector />
+      </div>
       {children}
     </div>
   );

frontend/src/components/layout/layout.tsx

@@ -0,0 +1,73 @@
+import { createContext, useContext, useEffect, useState } from "react";
+
+type Theme = "dark" | "light" | "system";
+
+type ThemeProviderProps = {
+  children: React.ReactNode;
+  defaultTheme?: Theme;
+  storageKey?: string;
+};
+
+type ThemeProviderState = {
+  theme: Theme;
+  setTheme: (theme: Theme) => void;
+};
+
+const initialState: ThemeProviderState = {
+  theme: "system",
+  setTheme: () => null,
+};
+
+const ThemeProviderContext = createContext<ThemeProviderState>(initialState);
+
+export function ThemeProvider({
+  children,
+  defaultTheme = "system",
+  storageKey = "vite-ui-theme",
+  ...props
+}: ThemeProviderProps) {
+  const [theme, setTheme] = useState<Theme>(
+    () => (localStorage.getItem(storageKey) as Theme) || defaultTheme,
+  );
+
+  useEffect(() => {
+    const root = window.document.documentElement;
+
+    root.classList.remove("light", "dark");
+
+    if (theme === "system") {
+      const systemTheme = window.matchMedia("(prefers-color-scheme: dark)")
+        .matches
+        ? "dark"
+        : "light";
+
+      root.classList.add(systemTheme);
+      return;
+    }
+
+    root.classList.add(theme);
+  }, [theme]);
+
+  const value = {
+    theme,
+    setTheme: (theme: Theme) => {
+      localStorage.setItem(storageKey, theme);
+      setTheme(theme);
+    },
+  };
+
+  return (
+    <ThemeProviderContext.Provider {...props} value={value}>
+      {children}
+    </ThemeProviderContext.Provider>
+  );
+}
+
+export const useTheme = () => {
+  const context = useContext(ThemeProviderContext);
+
+  if (context === undefined)
+    throw new Error("useTheme must be used within a ThemeProvider");
+
+  return context;
+};

frontend/src/components/providers/theme-provider.tsx

@@ -0,0 +1,40 @@
+import { Moon, Sun } from "lucide-react";
+
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { useTheme } from "@/components/providers/theme-provider";
+
+export function ThemeToggle() {
+  const { setTheme } = useTheme();
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button
+          className="bg-card text-card-foreground hover:bg-card/90"
+          size="icon"
+        >
+          <Sun className="h-[1.2rem] w-[1.2rem] scale-100 rotate-0 transition-all dark:scale-0 dark:-rotate-90" />
+          <Moon className="absolute h-[1.2rem] w-[1.2rem] scale-0 rotate-90 transition-all dark:scale-100 dark:rotate-0" />
+          <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>
+  );
+}

frontend/src/components/theme-toggle/theme-toggle.tsx

@@ -6,7 +6,7 @@ import { cn } from "@/lib/utils";
 import { Loader2 } from "lucide-react";
 
 const buttonVariants = cva(
-  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive hover:cursor-pointer",
   {
     variants: {
       variant: {