feat: solid-color graphite orb, 100% audio-driven stroke expansion (up to 8px) and bloom halo vanishing in silence, higher vertical placement

src/HUDOverlay.swift

@@ -14,11 +14,11 @@ public final class HUDOverlayController {
     public static let shared = HUDOverlayController()
     
     private var window: NSPanel?
-    private var orbView: MinimalSiriOrbView?
+    private var orbView: SolidSiriOrbView?
     private var isVisible = false
     
-    // Transparent canvas with plenty of margin so halo never clips
-    private let canvasSize: CGFloat = 160
+    // Large transparent canvas so audio-reactive halo never clips
+    private let canvasSize: CGFloat = 200
     
     private init() {
         DispatchQueue.main.async {
@@ -44,10 +44,10 @@ public final class HUDOverlayController {
         let container = NSView(frame: panel.contentView!.bounds)
         container.wantsLayer = true
         
-        // Minimal Siri Orb centered in canvas
-        let orbDiameter: CGFloat = 52
+        // Minimal Solid Orb centered in canvas
+        let orbDiameter: CGFloat = 50
         let orbOrigin = (canvasSize - orbDiameter) / 2.0
-        let orb = MinimalSiriOrbView(frame: NSRect(x: orbOrigin, y: orbOrigin, width: orbDiameter, height: orbDiameter))
+        let orb = SolidSiriOrbView(frame: NSRect(x: orbOrigin, y: orbOrigin, width: orbDiameter, height: orbDiameter))
         container.addSubview(orb)
         self.orbView = orb
         
@@ -59,8 +59,9 @@ public final class HUDOverlayController {
     private func reposition() {
         guard let window = self.window, let screen = NSScreen.main else { return }
         let screenRect = screen.visibleFrame
+        // Center horizontally, positioned comfortably higher above the dock
         let x = screenRect.midX - (canvasSize / 2.0)
-        let y = screenRect.minY + 28
+        let y = screenRect.minY + 75
         window.setFrameOrigin(NSPoint(x: x, y: y))
     }
     
@@ -126,16 +127,14 @@ public final class HUDOverlayController {
     }
 }
 
-// MARK: - Minimal Clean Siri Orb (Static, Non-Rotating, Audio-Reactive Stroke & Glow)
+// MARK: - Minimal Solid-Color Orb with 100% Dynamic Audio-Driven Stroke & Bloom Halo
 
-final class MinimalSiriOrbView: NSView {
+final class SolidSiriOrbView: NSView {
     private let glowLayer = CALayer()
-    private let gradientCoreLayer = CAGradientLayer()
+    private let solidCoreLayer = CALayer()
     private let strokeBorderLayer = CALayer()
     
-    private let baseDiameter: CGFloat = 52.0
-    private let minStrokeWidth: CGFloat = 1.5
-    private let maxStrokeWidth: CGFloat = 5.5
+    private let maxStrokeWidth: CGFloat = 8.0
     
     override init(frame frameRect: NSRect) {
         super.init(frame: frameRect)
@@ -156,82 +155,75 @@ final class MinimalSiriOrbView: NSView {
         let bounds = self.bounds
         let radius = bounds.width / 2.0
         
-        // 1. Soft Outer Atmospheric Glow (Breathes with voice volume)
-        glowLayer.frame = bounds.insetBy(dx: -10, dy: -10)
-        glowLayer.cornerRadius = (bounds.width + 20) / 2.0
-        glowLayer.backgroundColor = NSColor(red: 0.05, green: 0.65, blue: 1.0, alpha: 0.35).cgColor
-        glowLayer.shadowColor = NSColor(red: 0.50, green: 0.10, blue: 0.95, alpha: 0.85).cgColor
-        glowLayer.shadowRadius = 14
-        glowLayer.shadowOpacity = 0.60
+        // 1. Dynamic Outer Atmospheric Glow (100% audio-driven; disappears completely in silence)
+        glowLayer.frame = bounds.insetBy(dx: -12, dy: -12)
+        glowLayer.cornerRadius = (bounds.width + 24) / 2.0
+        glowLayer.backgroundColor = NSColor.clear.cgColor
+        glowLayer.shadowColor = NSColor.white.cgColor
+        glowLayer.shadowRadius = 0
+        glowLayer.shadowOpacity = 0.0
         glowLayer.shadowOffset = .zero
+        glowLayer.opacity = 0.0
         layer.addSublayer(glowLayer)
         
-        // 2. Clean, Minimal, Non-Rotating Siri Gradient Sphere
-        gradientCoreLayer.frame = bounds
-        gradientCoreLayer.cornerRadius = radius
-        gradientCoreLayer.type = .radial
-        gradientCoreLayer.colors = [
-            NSColor(red: 0.0, green: 0.92, blue: 1.0, alpha: 1.0).cgColor,     // Electric Cyan Core
-            NSColor(red: 0.45, green: 0.12, blue: 0.96, alpha: 0.98).cgColor,  // Rich Royal Violet
-            NSColor(red: 0.90, green: 0.08, blue: 0.58, alpha: 0.92).cgColor,  // Deep Magenta
-            NSColor(red: 0.08, green: 0.10, blue: 0.35, alpha: 0.88).cgColor   // Deep Navy Edge
-        ]
-        gradientCoreLayer.startPoint = CGPoint(x: 0.40, y: 0.40)
-        gradientCoreLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
-        layer.addSublayer(gradientCoreLayer)
-        
-        // 3. Dynamic Audio-Reactive Stroke Ring (Widening & brightening with speech)
+        // 2. Chic, Minimal Solid-Color Core (Apple Obsidian Graphite Disc)
+        solidCoreLayer.frame = bounds
+        solidCoreLayer.cornerRadius = radius
+        solidCoreLayer.backgroundColor = NSColor(red: 0.12, green: 0.12, blue: 0.14, alpha: 0.98).cgColor
+        layer.addSublayer(solidCoreLayer)
+        
+        // 3. Dynamic Voice-Reactive Stroke Ring (Disappears completely in silence)
         strokeBorderLayer.frame = bounds
         strokeBorderLayer.cornerRadius = radius
-        strokeBorderLayer.borderWidth = minStrokeWidth
-        strokeBorderLayer.borderColor = NSColor.white.withAlphaComponent(0.35).cgColor
+        strokeBorderLayer.borderWidth = 0.0
+        strokeBorderLayer.borderColor = NSColor.white.cgColor
         strokeBorderLayer.backgroundColor = NSColor.clear.cgColor
+        strokeBorderLayer.opacity = 0.0
         layer.addSublayer(strokeBorderLayer)
     }
     
-    /// Updates audio response: The orb remains steady (no jiggling/scaling),
-    /// while the stroke border thickness and outer glow bloom dynamically with voice.
+    /// Updates audio response:
+    /// In silence (level <= 0.04): stroke and halo disappear completely.
+    /// When speaking: stroke widens powerfully (up to 8px) and halo blooms dynamically.
     func updateAudioLevel(_ level: Float, isLagging: Bool) {
         CATransaction.begin()
         CATransaction.setDisableActions(true)
         
-        let clamped = CGFloat(min(max(level, 0.0), 1.0))
-        
-        if isLagging {
-            // Warm amber indicator for network degradation
-            gradientCoreLayer.colors = [
-                NSColor(red: 1.0, green: 0.80, blue: 0.20, alpha: 1.0).cgColor,
-                NSColor(red: 1.0, green: 0.45, blue: 0.0, alpha: 0.95).cgColor,
-                NSColor(red: 0.85, green: 0.15, blue: 0.0, alpha: 0.90).cgColor
-            ]
-            let strokeColor = NSColor(red: 1.0, green: 0.70, blue: 0.20, alpha: 0.6 + (0.4 * clamped))
-            strokeBorderLayer.borderColor = strokeColor.cgColor
-            glowLayer.shadowColor = NSColor.orange.cgColor
+        let rawClamped = CGFloat(min(max(level, 0.0), 1.0))
+        let silenceThreshold: CGFloat = 0.04
+        
+        if rawClamped <= silenceThreshold {
+            // Complete silence: Stroke and Halo completely vanish
+            strokeBorderLayer.borderWidth = 0.0
+            strokeBorderLayer.opacity = 0.0
+            glowLayer.shadowOpacity = 0.0
+            glowLayer.shadowRadius = 0.0
+            glowLayer.opacity = 0.0
         } else {
-            // Standard crisp Siri palette
-            gradientCoreLayer.colors = [
-                NSColor(red: 0.0, green: 0.92, blue: 1.0, alpha: 1.0).cgColor,
-                NSColor(red: 0.45, green: 0.12, blue: 0.96, alpha: 0.98).cgColor,
-                NSColor(red: 0.90, green: 0.08, blue: 0.58, alpha: 0.92).cgColor,
-                NSColor(red: 0.08, green: 0.10, blue: 0.35, alpha: 0.88).cgColor
-            ]
-            let strokeColor = NSColor(
-                red: 0.3 + (0.7 * clamped),
-                green: 0.95,
-                blue: 1.0,
-                alpha: 0.35 + (0.65 * clamped)
-            )
-            strokeBorderLayer.borderColor = strokeColor.cgColor
-            glowLayer.shadowColor = NSColor(red: 0.45, green: 0.10, blue: 0.95, alpha: 0.85).cgColor
-        }
+            // Active speech: scale dynamic intensity noticeably
+            let norm = (rawClamped - silenceThreshold) / (1.0 - silenceThreshold)
+            
+            if isLagging {
+                // Amber highlight for network degradation
+                let amber = NSColor(red: 1.0, green: 0.65, blue: 0.10, alpha: 0.95).cgColor
+                strokeBorderLayer.borderColor = amber
+                glowLayer.shadowColor = amber
+            } else {
+                // Crisp luminous white glow
+                strokeBorderLayer.borderColor = NSColor.white.cgColor
+                glowLayer.shadowColor = NSColor.white.cgColor
+            }
             
-        // 1. Dynamic Stroke Width: from 1.5px up to 5.5px based on voice volume
-        let dynamicWidth = minStrokeWidth + (clamped * (maxStrokeWidth - minStrokeWidth))
-        strokeBorderLayer.borderWidth = dynamicWidth
+            // 1. Noticeably powerful stroke expansion (from 0 to 8px)
+            let dynamicWidth = norm * maxStrokeWidth
+            strokeBorderLayer.borderWidth = dynamicWidth
+            strokeBorderLayer.opacity = Float(0.40 + (0.60 * norm))
             
-        // 2. Dynamic Outer Glow: blooms softly with speech
-        glowLayer.shadowRadius = 14 + (clamped * 24)
-        glowLayer.shadowOpacity = Float(0.60 + (clamped * 0.35))
+            // 2. Dynamic bloom halo (expands up to 45px radius)
+            glowLayer.shadowRadius = 6.0 + (norm * 38.0)
+            glowLayer.shadowOpacity = Float(0.35 + (0.65 * norm))
+            glowLayer.opacity = Float(norm)
+        }
         
         CATransaction.commit()
     }
@@ -239,20 +231,27 @@ final class MinimalSiriOrbView: NSView {
     func showRetryState() {
         CATransaction.begin()
         CATransaction.setDisableActions(false)
-        CATransaction.setAnimationDuration(0.25)
-        strokeBorderLayer.borderWidth = 3.5
+        CATransaction.setAnimationDuration(0.20)
+        strokeBorderLayer.borderWidth = 4.0
+        strokeBorderLayer.opacity = 1.0
         strokeBorderLayer.borderColor = NSColor.orange.cgColor
         glowLayer.shadowColor = NSColor.orange.cgColor
-        glowLayer.shadowRadius = 22
+        glowLayer.shadowRadius = 24
+        glowLayer.shadowOpacity = 0.9
+        glowLayer.opacity = 1.0
         CATransaction.commit()
     }
     
     func showTranscribingState() {
         CATransaction.begin()
         CATransaction.setDisableActions(true)
-        strokeBorderLayer.borderWidth = 2.5
-        strokeBorderLayer.borderColor = NSColor.cyan.cgColor
-        glowLayer.shadowRadius = 18
+        strokeBorderLayer.borderWidth = 3.0
+        strokeBorderLayer.opacity = 0.8
+        strokeBorderLayer.borderColor = NSColor.white.cgColor
+        glowLayer.shadowColor = NSColor.white.cgColor
+        glowLayer.shadowRadius = 16
+        glowLayer.shadowOpacity = 0.7
+        glowLayer.opacity = 0.8
         CATransaction.commit()
     }
     
@@ -260,10 +259,14 @@ final class MinimalSiriOrbView: NSView {
         CATransaction.begin()
         CATransaction.setDisableActions(false)
         CATransaction.setAnimationDuration(0.18)
-        strokeBorderLayer.borderWidth = 3.0
-        strokeBorderLayer.borderColor = NSColor(red: 0.1, green: 0.95, blue: 0.5, alpha: 1.0).cgColor
-        glowLayer.shadowColor = NSColor.green.cgColor
-        glowLayer.shadowRadius = 20
+        let green = NSColor(red: 0.15, green: 0.95, blue: 0.45, alpha: 1.0).cgColor
+        strokeBorderLayer.borderWidth = 4.0
+        strokeBorderLayer.opacity = 1.0
+        strokeBorderLayer.borderColor = green
+        glowLayer.shadowColor = green
+        glowLayer.shadowRadius = 22
+        glowLayer.shadowOpacity = 0.9
+        glowLayer.opacity = 1.0
         CATransaction.commit()
     }
     
@@ -271,20 +274,25 @@ final class MinimalSiriOrbView: NSView {
         CATransaction.begin()
         CATransaction.setDisableActions(false)
         CATransaction.setAnimationDuration(0.18)
-        strokeBorderLayer.borderWidth = 3.0
-        strokeBorderLayer.borderColor = NSColor.red.cgColor
-        glowLayer.shadowColor = NSColor.red.cgColor
-        glowLayer.shadowRadius = 20
+        let red = NSColor(red: 1.0, green: 0.20, blue: 0.20, alpha: 1.0).cgColor
+        strokeBorderLayer.borderWidth = 4.0
+        strokeBorderLayer.opacity = 1.0
+        strokeBorderLayer.borderColor = red
+        glowLayer.shadowColor = red
+        glowLayer.shadowRadius = 22
+        glowLayer.shadowOpacity = 0.9
+        glowLayer.opacity = 1.0
         CATransaction.commit()
     }
     
     func reset() {
         CATransaction.begin()
         CATransaction.setDisableActions(true)
-        strokeBorderLayer.borderWidth = minStrokeWidth
-        strokeBorderLayer.borderColor = NSColor.white.withAlphaComponent(0.35).cgColor
-        glowLayer.shadowRadius = 14
-        glowLayer.shadowOpacity = 0.60
+        strokeBorderLayer.borderWidth = 0.0
+        strokeBorderLayer.opacity = 0.0
+        glowLayer.shadowRadius = 0.0
+        glowLayer.shadowOpacity = 0.0
+        glowLayer.opacity = 0.0
         CATransaction.commit()
     }
 }