Efficiency: Release builds by default, only the visible island screen is built, character at 30 fps, adaptive mouse polling (60/30/10 Hz), hex colours parsed once

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

NotchBuddy/Sources/CoucouKit/ColorHex.swift

@@ -3,28 +3,44 @@ import CoreGraphics
 
 // Hex color helpers shared by the Mac app and the iPhone app.
 
+// Views ask for the same few dozen hex colours on every frame: parse each string once.
+private enum HexCache {
+    nonisolated(unsafe) static var colors: [String: Color] = [:]
+    nonisolated(unsafe) static var cgColors: [String: CGColor] = [:]
+    static let lock = NSLock()
+}
+
 // MARK: - Color from hex string
 
 extension Color {
     init(hex: String) {
+        HexCache.lock.lock()
+        if let c = HexCache.colors[hex] { HexCache.lock.unlock(); self = c; return }
+        HexCache.lock.unlock()
         let h = hex.trimmingCharacters(in: CharacterSet(charactersIn: "#"))
         let val = UInt64(h, radix: 16) ?? 0
         let r = Double((val >> 16) & 0xFF) / 255
         let g = Double((val >> 8)  & 0xFF) / 255
         let b = Double( val        & 0xFF) / 255
         self.init(red: r, green: g, blue: b)
+        HexCache.lock.lock(); HexCache.colors[hex] = self; HexCache.lock.unlock()
     }
 }
 
 // MARK: - CGColor from hex string
 
 func cgColorFromHex(_ hex: String) -> CGColor? {
+    HexCache.lock.lock()
+    if let c = HexCache.cgColors[hex] { HexCache.lock.unlock(); return c }
+    HexCache.lock.unlock()
     let h = hex.trimmingCharacters(in: CharacterSet(charactersIn: "#"))
     guard let val = UInt64(h, radix: 16) else { return nil }
     let r = CGFloat((val >> 16) & 0xFF) / 255
     let g = CGFloat((val >> 8)  & 0xFF) / 255
     let b = CGFloat( val        & 0xFF) / 255
-    return CGColor(red: r, green: g, blue: b, alpha: 1)
+    let c = CGColor(red: r, green: g, blue: b, alpha: 1)
+    HexCache.lock.lock(); HexCache.cgColors[hex] = c; HexCache.lock.unlock()
+    return c
 }
 
 extension CGColor {