feat: add emoji-regex and remove-accents dependencies; enhance chat and setup pages

- Added `emoji-regex` and `remove-accents` packages to improve text processing capabilities.
- Implemented automatic Ollama startup in the chat page for better user experience.
- Enhanced setup page to include GPU selection based on hardware specifications.
- Updated chat input to support real-time validation and improved user feedback.
- Refactored message handling in chat to incorporate new processing features.

components/notifications/welcome-notification.tsx

@@ -0,0 +1,67 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { X, Heart } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { cn } from '@/lib/utils';
+
+export function WelcomeNotification() {
+  const [show, setShow] = useState(false);
+  const [mounted, setMounted] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+    // Verificar se já foi mostrado
+    const welcomeShown = localStorage.getItem('ollahub_welcome_shown');
+    if (!welcomeShown) {
+      setShow(true);
+      // Marcar como mostrado
+      localStorage.setItem('ollahub_welcome_shown', 'true');
+      // Auto-fechar após 5 segundos
+      const timer = setTimeout(() => {
+        setShow(false);
+      }, 5000);
+      return () => clearTimeout(timer);
+    }
+  }, []);
+
+  if (!mounted || !show) {
+    return null;
+  }
+
+  return (
+    <div
+      className={cn(
+        "fixed top-4 left-1/2 -translate-x-1/2 z-50 w-full max-w-md",
+        "animate-in slide-in-from-top-5 fade-in duration-500"
+      )}
+    >
+      <div className="bg-primary text-primary-foreground rounded-lg shadow-lg p-4 mx-4">
+        <div className="flex items-start gap-3">
+          <Heart className="h-5 w-5 mt-0.5 flex-shrink-0" />
+          <div className="flex-1">
+            <h3 className="font-semibold text-sm mb-1">
+              Obrigado por usar o OllaHub! 🎉
+            </h3>
+            <p className="text-xs text-primary-foreground/90">
+              Estamos felizes em tê-lo conosco. Comece a explorar e aproveite sua experiência!
+            </p>
+          </div>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-6 w-6 text-primary-foreground hover:bg-primary-foreground/20 flex-shrink-0"
+            onClick={() => setShow(false)}
+          >
+            <X className="h-4 w-4" />
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+
+
+
+