feat: build IPTEK company website with full bilingual support

- Complete Next.js 16 app with App Router: Home, About, Products, Contact, Privacy pages
- Product detail pages: ZappCare, Unified TMS, EMR Clinic
- Bilingual support (Indonesian/English) via LanguageContext + translations.ts
- Language switcher pill button (🇮🇩 ID / 🇬🇧 EN) in Navbar with localStorage persistence
- Navbar with logo, responsive mobile menu, translated nav links
- Contact form with captcha, server action email sending, translated labels
- Material Design 3 color tokens, Manrope + Inter fonts, Material Symbols icons
- Local product image assets and company logo

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

context/LanguageContext.tsx

@@ -0,0 +1,32 @@
+"use client";
+
+import { createContext, useContext, useState, useEffect } from "react";
+
+export type Lang = "id" | "en";
+
+const LanguageContext = createContext<{
+  lang: Lang;
+  setLang: (l: Lang) => void;
+}>({ lang: "id", setLang: () => {} });
+
+export function LanguageProvider({ children }: { children: React.ReactNode }) {
+  const [lang, setLangState] = useState<Lang>("id");
+
+  useEffect(() => {
+    const stored = localStorage.getItem("iptek-lang") as Lang | null;
+    if (stored === "id" || stored === "en") setLangState(stored);
+  }, []);
+
+  const setLang = (l: Lang) => {
+    setLangState(l);
+    localStorage.setItem("iptek-lang", l);
+  };
+
+  return (
+    <LanguageContext.Provider value={{ lang, setLang }}>
+      {children}
+    </LanguageContext.Provider>
+  );
+}
+
+export const useLang = () => useContext(LanguageContext);