improve carplay apply button ui

Pocket Poster/Extensions/Views/Buttons/OpaqueButton.swift

@@ -0,0 +1,39 @@
+//
+//  OpaqueButton.swift
+//  Pocket Poster
+//
+//  Created by lemin on 6/21/25.
+//
+
+import SwiftUI
+
+struct OpaqueButton: ButtonStyle {
+    var color: Color
+    var textColor: Color
+    var fullwidth: Bool = false
+    
+    func makeBody(configuration: Configuration) -> some View {
+        ZStack {
+            if fullwidth {
+                configuration.label
+                    .padding(15)
+                    .frame(maxWidth: .infinity)
+                    .background(color)
+                    .cornerRadius(8)
+                    .foregroundColor(textColor)
+            } else {
+                configuration.label
+                    .padding(15)
+                    .background(color)
+                    .cornerRadius(8)
+                    .foregroundColor(textColor)
+            }
+        }
+    }
+    
+    init(color: Color = .blue, textColor: Color = .primary, fullwidth: Bool = false) {
+        self.color = color
+        self.textColor = textColor
+        self.fullwidth = fullwidth
+    }
+}