carservice: initial commit

src/lib/theme.tsx

@@ -0,0 +1,55 @@
+"use client";
+
+import { createContext, useContext, useEffect, useState, ReactNode } from "react";
+
+type Theme = "light" | "dark";
+
+interface ThemeContextType {
+  theme: Theme;
+  toggleTheme: () => void;
+  setTheme: (t: Theme) => void;
+}
+
+const ThemeContext = createContext<ThemeContextType>({
+  theme: "light",
+  toggleTheme: () => {},
+  setTheme: () => {},
+});
+
+export function useTheme() {
+  return useContext(ThemeContext);
+}
+
+export function ThemeProvider({ children }: { children: ReactNode }) {
+  const [theme, setThemeState] = useState<Theme>("light");
+  const [mounted, setMounted] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+    const saved = localStorage.getItem("theme") as Theme | null;
+    if (saved === "dark" || saved === "light") {
+      setThemeState(saved);
+      document.documentElement.classList.toggle("dark", saved === "dark");
+    }
+  }, []);
+
+  const setTheme = (t: Theme) => {
+    setThemeState(t);
+    localStorage.setItem("theme", t);
+    document.documentElement.classList.toggle("dark", t === "dark");
+  };
+
+  const toggleTheme = () => {
+    setTheme(theme === "light" ? "dark" : "light");
+  };
+
+  if (!mounted) {
+    return <div className="bg-steel-100 text-steel-900 min-h-screen">{children}</div>;
+  }
+
+  return (
+    <ThemeContext.Provider value={{ theme, toggleTheme, setTheme }}>
+      {children}
+    </ThemeContext.Provider>
+  );
+}