feat: update layout and components for improved user experience, add theme toggle and main navigation

thoughts-frontend/components/header.tsx

@@ -1,37 +1,39 @@
-// components/header.tsx
 "use client";
 
 import { useAuth } from "@/hooks/use-auth";
 import Link from "next/link";
 import { Button } from "./ui/button";
 import { UserNav } from "./user-nav";
+import { MainNav } from "./main-nav";
+import { ThemeToggle } from "./theme-toggle";
+import { Wind } from "lucide-react";
 
 export function Header() {
   const { token } = useAuth();
 
   return (
     <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
-      <div className="container flex h-14 items-center">
-        <div className="mr-4 flex">
-          <Link href="/" className="mr-6 flex items-center space-x-2">
-            <span className="font-bold">Thoughts</span>
+      <div className="w-full flex h-14 items-center px-2">
+        <div className="flex gap-2">
+          <Link href="/" className="flex items-center gap-1">
+            <span className="hidden font-bold sm:inline-block">Thoughts</span>
           </Link>
+          <MainNav />
         </div>
-        <div className="flex flex-1 items-center justify-end space-x-4">
-          <nav className="flex items-center space-x-2">
-            {token ? (
-              <UserNav />
-            ) : (
-              <>
-                <Button asChild variant="ghost">
-                  <Link href="/login">Login</Link>
-                </Button>
-                <Button asChild>
-                  <Link href="/register">Register</Link>
-                </Button>
-              </>
-            )}
-          </nav>
+        <div className="flex flex-1 items-center justify-end space-x-2">
+          <ThemeToggle />
+          {token ? (
+            <UserNav />
+          ) : (
+            <>
+              <Button asChild variant="ghost" size="sm">
+                <Link href="/login">Login</Link>
+              </Button>
+              <Button asChild size="sm">
+                <Link href="/register">Register</Link>
+              </Button>
+            </>
+          )}
         </div>
       </div>
     </header>