Fix SwiftLint errors from CI

- Remove trailing whitespace in MetronomeViewModel.swift and Tuning.swift
- Fix trailing newline in MetronomeViewModel.swift
- Use shorthand operators (+=) in SpectrumAnalyzerView.swift
- Use shorthand operator (*=) in TuningMeterView.swift
- Exclude Stay_TunedApp from type_name rule (Xcode auto-generated)

Author: Nick MacCarthy

.swiftlint.yml

@@ -42,6 +42,11 @@ disabled_rules:
   - function_body_length  # Some audio processing functions need to be long
   - cyclomatic_complexity  # Audio algorithms can be complex
 
+# Type name exceptions (Xcode auto-generates names with underscores)
+type_name:
+  excluded:
+    - Stay_TunedApp
+
 # Rule configurations
 identifier_name:
   min_length:

Stay Tuned/Stay Tuned/Models/Tuning.swift

@@ -13,17 +13,17 @@ struct Tuning: Identifiable, Hashable {
     let name: String
     let instrument: String  // e.g., "Guitar", "Bass", "Ukulele"
     let strings: [GuitarString]
-    
+
     /// Find the closest string to a given frequency
     func closestString(to frequency: Double) -> GuitarString? {
         guard !strings.isEmpty else { return nil }
-        
+
         return strings.min(by: { string1, string2 in
             abs(centsDeviation(from: frequency, to: string1.frequency)) <
             abs(centsDeviation(from: frequency, to: string2.frequency))
         })
     }
-    
+
     /// Calculate cents deviation between two frequencies
     private func centsDeviation(from detected: Double, to target: Double) -> Double {
         guard detected > 0 && target > 0 else { return 0 }

Stay Tuned/Stay Tuned/ViewModels/MetronomeViewModel.swift

@@ -11,22 +11,22 @@ import Combine
 /// ViewModel for the metronome feature
 @MainActor
 final class MetronomeViewModel: ObservableObject {
-    
+
     // MARK: - Published Properties
-    
+
     @Published var tempo: Double = 120
     @Published var isPlaying = false
     @Published var currentBeat: Int = 1
     @Published var timeSignature: TimeSignature = .fourFour
     @Published var volume: Float = 0.7
-    
+
     // MARK: - Persistence
-    
+
     @AppStorage("metronomeTempo") private var savedTempo: Int = 120
     @AppStorage("metronomeTimeSignature") private var savedTimeSignature: String = "4/4"
-    
+
     // MARK: - Private Properties
-    
+
     private let engine = MetronomeEngine()
     private var tapTimes: [Date] = []
     private let maxTapCount = 4
@@ -160,4 +160,3 @@ final class MetronomeViewModel: ObservableObject {
         tempo = max(40, min(240, calculatedBPM))
     }
 }
-

Stay Tuned/Stay Tuned/Views/SpectrumAnalyzerView.swift

@@ -220,18 +220,18 @@ struct SpectrumAnalyzerView: View {
         // Smooth animation
         for i in 0..<bandCount {
             if newEnergies[i] > bandEnergies[i] {
-                bandEnergies[i] = bandEnergies[i] + (newEnergies[i] - bandEnergies[i]) * 0.5
+                bandEnergies[i] += (newEnergies[i] - bandEnergies[i]) * 0.5
             } else {
-                bandEnergies[i] = bandEnergies[i] + (newEnergies[i] - bandEnergies[i]) * 0.12
+                bandEnergies[i] += (newEnergies[i] - bandEnergies[i]) * 0.12
             }
         }
-        
+
         // Update overall amplitude
         let avgEnergy = totalEnergy / CGFloat(bandCount)
         if avgEnergy > smoothedAmplitude {
-            smoothedAmplitude = smoothedAmplitude + (avgEnergy - smoothedAmplitude) * 0.4
+            smoothedAmplitude += (avgEnergy - smoothedAmplitude) * 0.4
         } else {
-            smoothedAmplitude = smoothedAmplitude + (avgEnergy - smoothedAmplitude) * 0.1
+            smoothedAmplitude += (avgEnergy - smoothedAmplitude) * 0.1
         }
     }
 

Stay Tuned/Stay Tuned/Views/TuningMeterView.swift

@@ -210,7 +210,7 @@ struct TuningMeterView: View {
         var displayCents = animatedCents
         if abs(displayCents) <= 7 {
             // Within ±5 cents: compress to ±2 visual range (feels more "locked in")
-            displayCents = displayCents * 0.4
+            displayCents *= 0.4
         }
 
         let normalizedPosition = (displayCents + 50) / 100