style: animação suave nos dialogs via CSS keyframes

Substitui classes do tailwindcss-animate (não instalado) por keyframes
CSS nativos. Efeito de fade + scale (96%→100%) ao abrir e fechar,
sem conflito com o posicionamento translate do Tailwind v4.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/globals.css

@@ -294,3 +294,52 @@
   animation: none;
   mix-blend-mode: normal;
 }
+
+/* Dialog animations */
+@keyframes dialog-in {
+  from {
+    opacity: 0;
+    transform: scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+@keyframes dialog-out {
+  from {
+    opacity: 1;
+    transform: scale(1);
+  }
+  to {
+    opacity: 0;
+    transform: scale(0.96);
+  }
+}
+
+@keyframes overlay-in {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+@keyframes overlay-out {
+  from { opacity: 1; }
+  to   { opacity: 0; }
+}
+
+[data-slot="dialog-overlay"][data-state="open"] {
+  animation: overlay-in 0.2s ease-out;
+}
+
+[data-slot="dialog-overlay"][data-state="closed"] {
+  animation: overlay-out 0.15s ease-in;
+}
+
+[data-slot="dialog-content"][data-state="open"] {
+  animation: dialog-in 0.25s cubic-bezier(0.16, 1, 0.3, 1);
+}
+
+[data-slot="dialog-content"][data-state="closed"] {
+  animation: dialog-out 0.15s ease-in;
+}

components/ui/dialog.tsx

@@ -37,7 +37,7 @@ function DialogOverlay({
 		<DialogPrimitive.Overlay
 			data-slot="dialog-overlay"
 			className={cn(
-				"data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 fixed inset-0 z-50 bg-black/50",
+				"fixed inset-0 z-50 bg-black/50",
 				className,
 			)}
 			{...props}
@@ -59,7 +59,7 @@ function DialogContent({
 			<DialogPrimitive.Content
 				data-slot="dialog-content"
 				className={cn(
-					"bg-background data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border p-6 shadow-lg duration-200 sm:max-w-lg",
+					"bg-background fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border p-6 shadow-lg sm:max-w-lg",
 					className,
 				)}
 				{...props}