Update SwiftUI FAB

Author: kean

Modules/Sources/DesignSystem/Components/FAB.swift

@@ -10,19 +10,43 @@ public struct FAB: View {
     }
 
     public var body: some View {
-        content
-            .dynamicTypeSize(...DynamicTypeSize.accessibility1) // important to be attached from the outside
+#if compiler(>=6.2)
+        if #available(iOS 26, *) {
+            modern
+        } else {
+            legacy
+        }
+#else
+        legacy
+#endif
     }
 
+    @available(iOS 26, *)
     @ViewBuilder
-    private var content: some View {
-        if let action {
-            Button(action: action) {
+    private var modern: some View {
+        Button(action: action ?? {}) {
+            Image(systemName: "plus")
+                .font(.system(size: 24, weight: .semibold))
+                .frame(width: 38, height: 38)
+                .foregroundStyle(Color(.systemBackground))
+        }
+        .buttonStyle(.glassProminent)
+        .buttonBorderShape(.circle)
+        .tint(Color(.label).opacity(0.8))
+    }
+
+    @ViewBuilder
+    private var legacy: some View {
+        Group {
+            if let action {
+                Button(action: action) {
+                    FABContentView(image: image)
+                }
+            } else {
                 FABContentView(image: image)
             }
-        } else {
-            FABContentView(image: image)
         }
+        .dynamicTypeSize(...DynamicTypeSize.accessibility1) // important to be attached from the outside
     }
 }