feat(dashboard): adicionar alerta de privacidade e ajustar estilos

- Adicionar alerta de privacidade na página de insights
- Ajustar classes de estilo para widgets de despesas e renda
- Atualizar .gitignore para incluir QWEN.md
- Modificar estilos de fundo e sombra no componente DashboardWelcome

components/dashboard/dashboard-welcome.tsx

@@ -51,7 +51,7 @@ export function DashboardWelcome({ name }: DashboardWelcomeProps) {
 
   return (
     <Card
-      className={`${main_font.className} relative px-6 py-12 bg-welcome-banner border-none shadow-lg overflow-hidden`}
+      className={`${main_font.className} relative px-6 py-12 bg-welcome-banner border-none shadow-none overflow-hidden`}
     >
       <div className="absolute inset-0 flex items-center justify-center opacity-20 pointer-events-none">
         <MagnetLines

components/dashboard/expenses-by-category-widget.tsx

@@ -127,9 +127,9 @@ export function ExpensesByCategoryWidget({
                   <span
                     className={`flex items-center gap-0.5 text-xs ${
                       hasIncrease
-                        ? "text-red-600"
+                        ? "text-red-600 dark:text-red-500"
                         : hasDecrease
-                        ? "text-green-600"
+                        ? "text-green-600 dark:text-green-500"
                         : "text-muted-foreground"
                     }`}
                   >

components/dashboard/income-by-category-widget.tsx

@@ -127,9 +127,9 @@ export function IncomeByCategoryWidget({
                   <span
                     className={`flex items-center gap-0.5 text-xs ${
                       hasIncrease
-                        ? "text-green-600"
+                        ? "text-green-600 dark:text-green-500"
                         : hasDecrease
-                        ? "text-red-600"
+                        ? "text-red-600 dark:text-red-500"
                         : "text-muted-foreground"
                     }`}
                   >