feat(docs): refine product showcase and branding

docs/components/site-header.tsx

@@ -1,71 +1,22 @@
-"use client";
-
 import Link from "next/link";
-import { useState } from "react";
 import { Brand } from "@/components/brand";
 import { Icon } from "@/components/icons";
 
-const navigation = [
-  { href: "/#how-it-works", label: "How it works" },
-  { href: "/#privacy", label: "Privacy" },
-  { href: "/#platforms", label: "Platforms" },
-];
-
 export function SiteHeader() {
-  const [open, setOpen] = useState(false);
-
   return (
     <header className="site-header">
-      <div className="header-inner">
+      <div className="header-inner page-shell">
         <Brand />
-        <nav className="desktop-nav" aria-label="Main navigation">
-          {navigation.map((item) => (
-            <Link key={item.href} href={item.href}>
-              {item.label}
-            </Link>
-          ))}
-        </nav>
-        <a
-          className="button button-small button-dark header-github"
+        <Link
+          className="header-github-button"
           href="https://github.com/vnidrop/vnidrop"
           target="_blank"
           rel="noreferrer"
         >
           <Icon name="github" />
-          GitHub
-        </a>
-        <button
-          className="menu-button"
-          type="button"
-          aria-expanded={open}
-          aria-controls="mobile-navigation"
-          aria-label={open ? "Close navigation" : "Open navigation"}
-          onClick={() => setOpen((value) => !value)}
-        >
-          <Icon name={open ? "close" : "menu"} />
-        </button>
+          View on GitHub
+        </Link>
       </div>
-      <nav
-        id="mobile-navigation"
-        className={`mobile-nav${open ? " is-open" : ""}`}
-        aria-label="Mobile navigation"
-      >
-        {navigation.map((item) => (
-          <Link key={item.href} href={item.href} onClick={() => setOpen(false)}>
-            {item.label}
-            <Icon name="arrow" />
-          </Link>
-        ))}
-        <a
-          href="https://github.com/vnidrop/vnidrop"
-          target="_blank"
-          rel="noreferrer"
-          onClick={() => setOpen(false)}
-        >
-          Explore on GitHub
-          <Icon name="github" />
-        </a>
-      </nav>
     </header>
   );
 }