feat: make traffic lights symbols dark in light theme

closes #132

DockDoor/Views/Hover Window/Traffic Light Buttons.swift

@@ -15,10 +15,10 @@ struct TrafficLightButtons: View {
 
     var body: some View {
         HStack(spacing: 6) {
-            buttonFor(action: .quit, symbol: "power", color: .purple)
-            buttonFor(action: .close, symbol: "xmark", color: .red)
-            buttonFor(action: .minimize, symbol: "minus", color: .yellow)
-            buttonFor(action: .toggleFullScreen, symbol: "arrow.up.left.and.arrow.down.right", color: .green)
+            buttonFor(action: .quit, symbol: "power", color: Color(hex: "290133"), fillColor: .purple)
+            buttonFor(action: .close, symbol: "xmark", color: Color(hex: "7e0609"), fillColor: .red)
+            buttonFor(action: .minimize, symbol: "minus", color: Color(hex: "985712"), fillColor: .yellow)
+            buttonFor(action: .toggleFullScreen, symbol: "arrow.up.left.and.arrow.down.right", color: Color(hex: "0d650d"), fillColor: .green)
         }
         .padding(4)
         .opacity(isHovering ? 1 : 0.25)
@@ -29,7 +29,7 @@ struct TrafficLightButtons: View {
         }
     }
 
-    private func buttonFor(action: WindowAction, symbol: String, color: Color) -> some View {
+    private func buttonFor(action: WindowAction, symbol: String, color: Color, fillColor: Color) -> some View {
         Button(action: {
             performAction(action)
             onAction()
@@ -41,7 +41,7 @@ struct TrafficLightButtons: View {
             }
         }
         .buttonBorderShape(.roundedRectangle)
-        .foregroundStyle(color)
+        .foregroundStyle(color, fillColor)
         .buttonStyle(.plain)
         .font(.system(size: 13))
     }
@@ -63,3 +63,30 @@ struct TrafficLightButtons: View {
         case quit, close, minimize, toggleFullScreen
     }
 }
+
+extension Color {
+    init(hex: String) {
+        let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
+        var int: UInt64 = 0
+        Scanner(string: hex).scanHexInt64(&int)
+        let a, r, g, b: UInt64
+        switch hex.count {
+        case 3: // RGB (12-bit)
+            (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
+        case 6: // RGB (24-bit)
+            (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
+        case 8: // ARGB (32-bit)
+            (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
+        default:
+            (a, r, g, b) = (1, 1, 1, 0)
+        }
+
+        self.init(
+            .sRGB,
+            red: Double(r) / 255,
+            green: Double(g) / 255,
+            blue:  Double(b) / 255,
+            opacity: Double(a) / 255
+        )
+    }
+}