Refactor: Restrict AI model selection

src/components/ChatHeader.tsx

@@ -7,12 +7,16 @@ import {
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
 
-export const ChatHeader = () => {
+interface ChatHeaderProps {
+  showModelSelector?: boolean;
+}
+
+export const ChatHeader = ({ showModelSelector = false }: ChatHeaderProps) => {
   const models = [
     "ChatGPT 4.1",
-    "GPT-5 Mini",
+    "ChatGPT 5",
-    "Claude 3.5 Sonnet",
+    "Claude Sonnet 4.5",
-    "Gemini 2.5 Flash",
+    "Claude Opus 4.1",
   ];
 
   return (
@@ -23,6 +27,7 @@ export const ChatHeader = () => {
           <span className="text-sm text-muted-foreground">Online</span>
         </div>
         
+        {showModelSelector && (
           <DropdownMenu>
             <DropdownMenuTrigger asChild>
               <Button variant="outline" className="gap-2 glass-effect">
@@ -30,7 +35,7 @@ export const ChatHeader = () => {
                 <ChevronDown className="w-4 h-4" />
               </Button>
             </DropdownMenuTrigger>
-          <DropdownMenuContent align="start" className="glass-effect">
+            <DropdownMenuContent align="start" className="glass-effect bg-popover border-border z-50">
               {models.map((model) => (
                 <DropdownMenuItem key={model} className="cursor-pointer">
                   {model}
@@ -38,10 +43,11 @@ export const ChatHeader = () => {
               ))}
             </DropdownMenuContent>
           </DropdownMenu>
+        )}
       </div>
 
       <div className="text-sm text-muted-foreground">
-        Modelo de linguagem avançado
+        {showModelSelector ? "Modelo de linguagem avançado" : "Sistema HGTX Codex"}
       </div>
     </header>
   );

src/components/chat/ChatView.tsx

@@ -52,7 +52,7 @@ export const ChatView = () => {
 
       {/* Main Chat Area */}
       <div className="flex-1 flex flex-col">
-        <ChatHeader />
+        <ChatHeader showModelSelector={true} />
 
         <ScrollArea className="flex-1">
           <div className="max-w-4xl mx-auto">