Update download links and repo URLs to v4.0.0

Author: Copilot

src/app/page.tsx

@@ -793,7 +793,7 @@ function Header() {
               {/* Desktop: Right side actions */}
               <div className="hidden md:flex items-center gap-2">
                 <a 
-                  href="https://github.com/optimizerplus/optimizer-plus-v3.7.2" 
+                  href="https://github.com/optimizerplus/optimizer-plus" 
                   target="_blank"
                   rel="noopener noreferrer"
                   className="p-2 rounded-lg text-white/70 transition-all duration-300 hover:text-white hover:bg-white/5 active:scale-95"
@@ -839,7 +839,7 @@ function Header() {
 
                 <div className="flex items-center gap-3 mt-2 pt-3 border-t border-white/10">
                   <a 
-                    href="https://github.com/optimizerplus/optimizer-plus-v3.7.2" 
+                    href="https://github.com/optimizerplus/optimizer-plus" 
                     target="_blank"
                     rel="noopener noreferrer"
                     className="flex items-center gap-2 px-4 py-2.5 rounded-lg text-white/70 bg-white/5 transition-all duration-200 hover:text-white hover:bg-white/10"
@@ -1761,7 +1761,7 @@ function Download() {
 
           <div className="flex flex-col sm:flex-row items-center justify-center gap-4">
             <a 
-              href="https://github.com/optimizerplus/optimizer-plus-v3.7.2/raw/beta/Boosteroid-Optimizer-Plus.user.js" 
+              href="https://github.com/optimizerplus/optimizer-plus/releases/download/v4.0.0/Boosteroid.Optimizer.Plus.by.Derfog-4.0.0.user.js" 
               className="group opt-btn-primary flex items-center gap-3 text-lg px-8 py-4 w-full sm:w-auto justify-center relative overflow-hidden perspective-1000"
             >
               <span className="absolute inset-0 bg-gradient-to-r from-boo-green via-cyan-400 to-boo-blue opacity-0 group-hover:opacity-100 transition-opacity duration-500"></span>
@@ -1772,7 +1772,7 @@ function Download() {
               </span>
             </a>
             <a 
-              href="https://github.com/optimizerplus/optimizer-plus-v3.7.2" 
+              href="https://github.com/optimizerplus/optimizer-plus" 
               target="_blank"
               rel="noopener noreferrer"
               className="opt-btn-secondary flex items-center gap-3 text-lg px-8 py-4 w-full sm:w-auto justify-center hover:border-purple-500/50 hover:shadow-[0_0_20px_rgba(168,85,247,0.3)] transition-all duration-300"
@@ -1965,7 +1965,7 @@ function Footer() {
             </a>
             <span className="hidden sm:block w-px h-4 bg-white/20" />
             <a 
-              href="https://github.com/optimizerplus/optimizer-plus-v3.7.2" 
+              href="https://github.com/optimizerplus/optimizer-plus" 
               target="_blank" 
               rel="noopener noreferrer" 
               className="flex items-center gap-2 text-white/60 hover:text-white transition-colors text-sm font-medium group"