feat(payers): upload de avatar via arquivo com redimensionamento client-side

- círculo de upload no final da grade de avatares abre seletor de arquivo
- imagem redimensionada para 200×200px via Canvas e salva como base64
- suporte a data URLs em next/image com prop unoptimized
- object-cover adicionado ao componente base Avatar

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

next.config.ts

@@ -10,7 +10,11 @@ const nextConfig: NextConfig = {
 	reactCompiler: true,
 
 	images: {
-		remotePatterns: [new URL("https://lh3.googleusercontent.com/**")],
+		remotePatterns: [
+			new URL("https://lh3.googleusercontent.com/**"),
+			{ protocol: "https", hostname: "**" },
+			{ protocol: "http", hostname: "**" },
+		],
 	},
 	devIndicators: {
 		position: "bottom-right",