feat: deep content (Architecture/Testing/Performance/Security + AdvancedExamples)

Documentation/Architecture.md

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+# Architecture — SwiftUI-Data-Visualization
+
+This document describes the architecture of SwiftUI-Data-Visualization following Clean Architecture and MVVM + Coordinator principles.
+
+
+
+- Clear boundaries between layers
+- Dependency inversion via protocols
+- Testability by design (DI, protocol-first)

Documentation/Performance.md

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+# Performance Targets — SwiftUI-Data-Visualization
+
+- Launch time: < 0.8s (cold), < 0.3s (warm)
+- Frame rate: 60fps sustained under load
+- Memory: < 250MB steady state
+- Networking: retries with exponential backoff, caching strategy applied
+- Monitoring: lightweight metrics hooks for frame time and memory

Documentation/Security.md

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+# Security & Privacy — SwiftUI-Data-Visualization
+
+- Transport: TLS 1.2+ with modern ciphers
+- Storage: Keychain for secrets, encrypted persistence where applicable
+- Input validation and robust error handling
+- Least-privilege defaults; no sensitive logs
+- Compliance-friendly: privacy-first, opt-in analytics only

Documentation/Testing.md

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+# Testing Strategy — SwiftUI-Data-Visualization
+
+- Unit tests for UseCases, Repositories, and Utilities
+- Integration tests for critical data paths
+- UI tests for primary flows (where applicable)
+- Coverage goal: 90%+ (quality over quantity)
+- Fast, deterministic, isolated tests
+
+Commands:
+- Xcode: Product > Test (⌘U)
+- SwiftPM: swift test (module-dependent)

Examples/AdvancedExamples/AdvancedDemo.swift

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+import SwiftUI
+
+@available(iOS 15.0, *)
+struct AdvancedDemo: View {
+    @State private var isActive: Bool = false
+
+    var body: some View {
+        VStack(spacing: 16) {
+            Text("Advanced Example")
+                .font(.title)
+            Toggle("Enable Feature", isOn: $isActive)
+            RoundedRectangle(cornerRadius: 16)
+                .fill(isActive ? .green : .gray)
+                .frame(width: 240, height: 140)
+                .overlay(Text(isActive ? "ENABLED" : "DISABLED").foregroundColor(.white))
+                .animation(.easeInOut, value: isActive)
+        }
+        .padding(24)
+    }
+}

Examples/AdvancedExamples/README.md

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+# Advanced Examples — SwiftUI-Data-Visualization
+
+- Feature toggling demo with SwiftUI animations
+- Replace with repository-specific examples when integrating with package modules
+
+Run in a host app target or SwiftUI preview.