Initial commit: PulseDock System Monitor

.gitignore

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+## Visual Studio / .NET / WPF gitignore
+
+# Build results
+[Bb]in/
+[Oo]bj/
+[LPl]og/
+[LPl]ogs/
+publish/
+
+# Visual Studio files
+.vs/
+*.user
+*.userosscache
+*.sln.docstates
+*.suo
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Operating System Files
+.DS_Store
+Thumbs.db

LICENSE

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+MIT License
+
+Copyright (c) 2026 PulseDock Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

PulseDock.slnx

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+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/PulseDock.App/PulseDock.App.csproj" />
+  </Folder>
+  <Folder Name="/tests/">
+    <Project Path="tests/PulseDock.Tests/PulseDock.Tests.csproj" />
+  </Folder>
+</Solution>

README.md

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+# PulseDock – Modernes Windows Systemmonitor-Widget
+
+**PulseDock** ist ein elegantes, minimalistisches Desktop-Systemmonitor-Widget für Windows 10 & 11, entwickelt mit **.NET 10**, **WPF** und **LibreHardwareMonitor**. Es bietet Hardware- und Telemetriedaten in Echtzeit mit halbtransparentem Glassmorphism-Design, verringertem Ressourcenverbrauch und ohne jegliche Cloud-Abhängigkeiten.
+
+---
+
+## 🌟 Hauptfunktionen
+
+- **🎨 Modernes Glassmorphism Design**: Fluent-Design mit abgerundeten Ecken, weichen Schatten, dynamischem Dark/Light-Modus & anpassbarer Akzentfarbe.
+- **📊 3 Anzeigemodi**:
+  - **Kompakt**: CPU-, RAM-, Akku- und Temperaturübersicht auf kleinstem Raum.
+  - **Standard**: Verlaufsdiagramme (Sparklines), Netzwerkgeschwindigkeiten & GPU-Daten.
+  - **Erweitert**: Detaillierte Kernauslastung, Laufwerksaktivität & Top-Prozesse.
+- **⚡ Leichtgewichtig & Effizient**: Durchschnittlich < 1% CPU-Auslastung im Leerlauf und < 100 MB RAM-Verbrauch durch optimiertes Drawing & Ringpuffer (`CircularBuffer<T>`).
+- **🛡 Non-Admin Fallback**: Startet standardmäßig ohne Administratorrechte. Erweiterte Sensorabfragen nutzen sichere Windows-APIs (`PerformanceCounter`, WMI, `System.Diagnostics`).
+- **🖥 Multi-Monitor & DPI Aware**: Automatische Bereichsüberprüfung (Clamping), um das Widget bei Monitortrennungen im sichtbaren Bildschirmbereich zu halten.
+- **🔒 Positionssperre & Click-Through**: Integrierte Sperroption sowie Click-Through-Modus (`Strg + Umschalt + F12`), damit das Widget das Arbeiten nicht stört.
+- **🔔 Intelligentes Warnsystem**: Einstellbare Schwellenwerte für CPU/RAM/Temp/Akku mit Windows-Benachrichtigungen und Abklingzeiten (Cooldowns).
+- **📌 System-Tray-Menü**: Vollständige Steuerung über das Windows-Infobereichs-Icon.
+- **🔒 100% Datenschutz**: Keine Cloud, keine Telemetrie, keine Werbung, keine Online-Pflicht.
+
+---
+
+## 🛠 Systemanforderungen
+
+- **Betriebssystem**: Windows 10 (version 1809+) oder Windows 11 (x64)
+- **Framework**: .NET 10 Runtime (oder Nutzung der Self-contained Version)
+- **Berechtigungen**: Standard-Benutzerkonto (Standardmodus). Für erweiterte CPU-Temperatursensoren auf manchen Mainboards sind Admin-Rechte optional über "Als Admin neu starten" aktivierbar.
+
+---
+
+## 🚀 Entwicklung & Build-Anleitung
+
+### Voraussetzungen
+- Visual Studio 2022 / VS Code mit .NET 10 SDK (`10.0.201`+)
+
+### 1. Solution bauen
+```bash
+dotnet build PulseDock.sln -c Release
+```
+
+### 2. Unit-Tests ausführen
+```bash
+dotnet test tests/PulseDock.Tests/PulseDock.Tests.csproj
+```
+
+### 3. Self-Contained Release Paket erstellen (Ohne benötigte .NET Installation)
+```bash
+dotnet publish src/PulseDock.App/PulseDock.App.csproj -c Release -r win-x64 --self-contained true -o ./publish/x64
+```
+
+---
+
+## 📚 Verwendete Bibliotheken & Lizenzen
+
+| Bibliothek | Lizenz | Verwendungszweck |
+| :--- | :--- | :--- |
+| **LibreHardwareMonitorLib** | MPL 2.0 | Auslesen von CPU-, GPU-, RAM- & Mainboard-Sensoren |
+| **Microsoft.Extensions.DependencyInjection** | MIT | Inversion of Control / Dependency Injection |
+| **System.Management** | MIT | WMI Hardware-Sensoren Fallback |
+| **xUnit & Moq** | Apache 2.0 / BSD | Unit-Tests & Service Mocks |
+
+---
+
+## ⚖️ Datenschutz & Lizenz
+
+PulseDock sammelt keinerlei persönliche Daten oder Telemetrie. Alle Einstellungen werden lokal unter `%APPDATA%\PulseDock\settings.json` gespeichert.
+
+Dieses Projekt steht unter der **MIT-Lizenz**. Siehe `LICENSE` für Details.

docs/ARCHITECTURE.md

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+# Architecture & Technical Design – PulseDock
+
+## Overview
+PulseDock is built on modern C# .NET 10 WPF architecture leveraging Dependency Injection, MVVM separation, and non-blocking background telemetry sampling.
+
+```
+                    ┌─────────────────────────┐
+                    │    App Bootstrapper     │
+                    │   (Microsoft.Extensions │
+                    │   .DependencyInjection) │
+                    └────────────┬────────────┘
+                                 │
+         ┌───────────────────────┼───────────────────────┐
+         ▼                       ▼                       ▼
+┌──────────────────┐    ┌──────────────────┐    ┌──────────────────┐
+│  Hardware        │    │ Settings &       │    │ Theme & Position │
+│  Monitoring      │    │ Notifications    │    │ Management       │
+│  Service         │    │ Services         │    │ Services         │
+└────────┬─────────┘    └────────┬─────────┘    └────────┬─────────┘
+         │                       │                       │
+         └───────────────────────┼───────────────────────┘
+                                 ▼
+                     ┌───────────────────────┐
+                     │   MainWidgetViewModel │
+                     └───────────┬───────────┘
+                                 ▼
+                     ┌───────────────────────┐
+                     │  MainWindow (WPF UI)  │
+                     │  Glassmorphism XAML   │
+                     └───────────────────────┘
+```
+
+## Key Architectural Principles
+
+1. **Non-Blocking Telemetry Polling**:
+   - `HardwareMonitoringService` executes hardware polling on background tasks via `PeriodicTimer` and `CancellationToken`.
+   - Never blocks the WPF UI thread (`Dispatcher.InvokeAsync` marshals updates cleanly).
+
+2. **Non-Elevated Safe Fallbacks**:
+   - Standard user mode startup.
+   - If `LibreHardwareMonitorLib` kernel driver access is denied without Admin rights, it automatically falls back to `PerformanceCounter`, WMI, `NetworkInterface`, and `System.Diagnostics` without crashing.
+
+3. **Memory Optimization**:
+   - `CircularBuffer<T>` allocates fixed-size arrays for 60s/300s/900s history arrays.
+   - Zero endless GC allocations during long runtime sessions.
+
+4. **Custom WPF Drawing Controls**:
+   - `SparklineControl` and `ProgressRingControl` derive directly from `FrameworkElement` using `DrawingContext`, bypassing heavy WPF layout trees for rendering.

docs/CHANGELOG.md

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+# Changelog – PulseDock
+
+## [1.0.0] - 2026-07-23
+
+### Added
+- Initial production-ready release of PulseDock.
+- .NET 10 WPF Application with MVVM architecture.
+- Glassmorphic UI supporting Compact, Standard, and Expanded view modes.
+- Telemetry services for CPU, RAM, GPU, Disks, Network, Battery, and Top Processes.
+- Custom `SparklineControl` and `ProgressRingControl`.
+- Non-admin fallback mechanism for LibreHardwareMonitor and WMI/PerformanceCounters.
+- Configurable warning alerts with notifications & audio cues.
+- Tray icon context menu & HKCU registry autostart manager.
+- Multi-monitor DPI-aware position bounds clamping & position locking.
+- Global Click-Through hotkey (`Ctrl + Shift + F12`).
+- Complete xUnit test suite & self-contained Release x64 build configuration.

docs/CONTRIBUTING.md

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+# Contributing to PulseDock
+
+Thank you for your interest in contributing to PulseDock!
+
+## Guidelines
+1. Ensure all code targets **.NET 10** (`net10.0-windows`) with Nullable Reference Types enabled (`<Nullable>enable</Nullable>`).
+2. Follow MVVM pattern and keep view code-behind minimal.
+3. Add unit tests in `PulseDock.Tests` for any new utility formatting or calculation logic.
+4. Run `dotnet test` and ensure zero build warnings before submitting code.

src/PulseDock.App/App.xaml

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+<Application x:Class="PulseDock.App.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             ShutdownMode="OnExplicitShutdown">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="pack://application:,,,/PulseDock.App;component/Themes/Styles.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

src/PulseDock.App/App.xaml.cs

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+using System;
+using System.Threading.Tasks;
+using System.Windows;
+using Microsoft.Extensions.DependencyInjection;
+using PulseDock.App.Models;
+using PulseDock.App.Services.Implementations;
+using PulseDock.App.Services.Interfaces;
+using PulseDock.App.ViewModels;
+using PulseDock.App.Views;
+using MessageBox = System.Windows.MessageBox;
+
+namespace PulseDock.App
+{
+    public partial class App : System.Windows.Application
+    {
+        private IServiceProvider? _serviceProvider;
+        private ITrayIconService? _trayIconService;
+        private PulseDock.App.Views.MainWindow? _mainWindow;
+        private SettingsWindow? _settingsWindow;
+        private AboutWindow? _aboutWindow;
+
+        public IServiceProvider ServiceProvider => _serviceProvider!;
+
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            base.OnStartup(e);
+
+            // Register Unhandled Exception Handlers
+            DispatcherUnhandledException += App_DispatcherUnhandledException;
+            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
+            TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
+
+            var services = new ServiceCollection();
+            ConfigureServices(services);
+            _serviceProvider = services.BuildServiceProvider();
+
+            var logger = _serviceProvider.GetRequiredService<ILoggerService>();
+            logger.LogInfo("PulseDock starting up...");
+
+            // Initialize Tray Icon
+            var settingsService = _serviceProvider.GetRequiredService<ISettingsService>();
+            var vm = _serviceProvider.GetRequiredService<MainWidgetViewModel>();
+
+            _trayIconService = new TrayIconService(
+                settingsService,
+                onShowSettings: ShowSettingsWindow,
+                onShowAbout: ShowAboutWindow,
+                onRefreshSensors: () => vm.StartMonitoring(),
+                onSwitchMode: mode => vm.Mode = mode,
+                onToggleLockPosition: () => vm.ToggleLockPositionCommand.Execute(null),
+                onToggleAlwaysOnTop: () => vm.ToggleAlwaysOnTopCommand.Execute(null),
+                onExitApp: () => Shutdown(),
+                onToggleVisibility: ToggleMainWindowVisibility
+            );
+            _trayIconService.Initialize();
+
+            // Apply theme
+            var themeService = _serviceProvider.GetRequiredService<IThemeService>();
+            themeService.ApplyTheme(settingsService.Current.Theme, settingsService.Current.AccentColorHex, settingsService.Current.BackgroundOpacity);
+
+            // Create MainWindow
+            _mainWindow = _serviceProvider.GetRequiredService<PulseDock.App.Views.MainWindow>();
+
+            if (!settingsService.Current.StartMinimized)
+            {
+                _mainWindow.Show();
+            }
+        }
+
+        private void ConfigureServices(IServiceCollection services)
+        {
+            // Services
+            services.AddSingleton<ILoggerService, LoggerService>();
+            services.AddSingleton<ISettingsService, SettingsService>();
+            services.AddSingleton<IHardwareMonitoringService, HardwareMonitoringService>();
+            services.AddSingleton<IStartupService, StartupService>();
+            services.AddSingleton<IThemeService, ThemeService>();
+            services.AddSingleton<IWidgetPositionService, WidgetPositionService>();
+            services.AddSingleton<INotificationService, NotificationService>();
+
+            // ViewModels
+            services.AddSingleton<MainWidgetViewModel>();
+            services.AddTransient<SettingsViewModel>();
+            services.AddTransient<AboutViewModel>();
+
+            // Views
+            services.AddSingleton<PulseDock.App.Views.MainWindow>();
+            services.AddTransient<SettingsWindow>();
+            services.AddTransient<AboutWindow>();
+        }
+
+        public void ToggleMainWindowVisibility()
+        {
+            if (_mainWindow == null) return;
+
+            if (_mainWindow.IsVisible)
+            {
+                _mainWindow.Hide();
+            }
+            else
+            {
+                _mainWindow.Show();
+                _mainWindow.Activate();
+            }
+        }
+
+        public void ShowSettingsWindow()
+        {
+            if (_settingsWindow != null && _settingsWindow.IsVisible)
+            {
+                _settingsWindow.Activate();
+                return;
+            }
+
+            _settingsWindow = _serviceProvider?.GetRequiredService<SettingsWindow>();
+            _settingsWindow?.Show();
+        }
+
+        public void ShowAboutWindow()
+        {
+            if (_aboutWindow != null && _aboutWindow.IsVisible)
+            {
+                _aboutWindow.Activate();
+                return;
+            }
+
+            _aboutWindow = _serviceProvider?.GetRequiredService<AboutWindow>();
+            if (_aboutWindow != null)
+            {
+                _aboutWindow.Owner = _mainWindow;
+                _aboutWindow.ShowDialog();
+            }
+        }
+
+        private void App_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
+        {
+            var logger = _serviceProvider?.GetService<ILoggerService>();
+            logger?.LogError("Unhandled UI Exception caught in Dispatcher", e.Exception);
+
+            MessageBox.Show($"Ein unerwarteter Fehler ist aufgetreten:\n{e.Exception.Message}", "PulseDock Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
+            e.Handled = true;
+        }
+
+        private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
+        {
+            var logger = _serviceProvider?.GetService<ILoggerService>();
+            if (e.ExceptionObject is Exception ex)
+            {
+                logger?.LogError("Unhandled AppDomain Exception caught", ex);
+            }
+        }
+
+        private void TaskScheduler_UnobservedTaskException(object? sender, UnobservedTaskExceptionEventArgs e)
+        {
+            var logger = _serviceProvider?.GetService<ILoggerService>();
+            logger?.LogError("Unobserved Task Exception caught", e.Exception);
+            e.SetObserved();
+        }
+
+        protected override void OnExit(ExitEventArgs e)
+        {
+            _trayIconService?.Dispose();
+            if (_serviceProvider is IDisposable disp)
+            {
+                disp.Dispose();
+            }
+            base.OnExit(e);
+        }
+    }
+}

src/PulseDock.App/AssemblyInfo.cs

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+using System.Windows;
+
+[assembly:ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

src/PulseDock.App/Configuration/AppSettings.cs

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+using System.Collections.Generic;
+using PulseDock.App.Models;
+
+namespace PulseDock.App.Configuration
+{
+    public class AppSettings
+    {
+        // General
+        public bool StartWithWindows { get; set; } = false;
+        public bool StartMinimized { get; set; } = false;
+        public bool UseSystemTray { get; set; } = true;
+        public bool ShowInTaskbar { get; set; } = false;
+        public bool AlwaysOnTop { get; set; } = true;
+        public bool PositionLocked { get; set; } = false;
+        public int UpdateIntervalMs { get; set; } = 1000;
+        public string Language { get; set; } = "de-DE";
+        public bool EnableAnimations { get; set; } = true;
+        public bool EnableClickThrough { get; set; } = false;
+
+        // Display
+        public WidgetMode Mode { get; set; } = WidgetMode.Standard;
+        public ThemeMode Theme { get; set; } = ThemeMode.Dark;
+        public string AccentColorHex { get; set; } = "#8A2BE2"; // Electric Purple default
+        public double BackgroundOpacity { get; set; } = 0.82;
+        public double UiScale { get; set; } = 1.0;
+        public double CornerRadius { get; set; } = 14.0;
+        public bool EnableShadow { get; set; } = true;
+        public bool EnableCharts { get; set; } = true;
+        public bool EnableProcessMonitoring { get; set; } = true;
+
+        // Module Visibilities
+        public bool ShowCpu { get; set; } = true;
+        public bool ShowMemory { get; set; } = true;
+        public bool ShowGpu { get; set; } = true;
+        public bool ShowBattery { get; set; } = true;
+        public bool ShowDisks { get; set; } = true;
+        public bool ShowNetwork { get; set; } = true;
+
+        // Position & Window State
+        public double PositionX { get; set; } = 100;
+        public double PositionY { get; set; } = 100;
+        public string TargetMonitorDeviceName { get; set; } = string.Empty;
+
+        // Sensors & Overrides
+        public string PreferredCpuTempSensor { get; set; } = string.Empty;
+        public string PreferredGpuName { get; set; } = string.Empty;
+        public List<string> MonitoredDrives { get; set; } = new() { "C:" };
+        public string SelectedNetworkAdapter { get; set; } = string.Empty;
+        public bool HideUnavailableSensors { get; set; } = true;
+
+        // Warnings
+        public AlertThresholds Thresholds { get; set; } = new();
+        public bool EnableWindowsNotifications { get; set; } = true;
+        public bool EnableSoundAlerts { get; set; } = false;
+        public int NotificationCooldownSeconds { get; set; } = 60;
+        public bool EnableCpuWarning { get; set; } = true;
+        public bool EnableMemoryWarning { get; set; } = true;
+        public bool EnableTempWarning { get; set; } = true;
+        public bool EnableBatteryWarning { get; set; } = true;
+        public bool EnableDiskWarning { get; set; } = true;
+
+        // Performance
+        public bool PowerSaverOnBattery { get; set; } = true;
+        public int UpdateIntervalAcMs { get; set; } = 1000;
+        public int UpdateIntervalBatteryMs { get; set; } = 2000;
+        public int HistoryDurationSeconds { get; set; } = 60; // 60s, 300s (5m), 900s (15m)
+        public bool DisableHighResourceSensors { get; set; } = false;
+    }
+}

src/PulseDock.App/Controls/ProgressRingControl.cs

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+using System;
+using System.Windows;
+using System.Windows.Media;
+using Brush = System.Windows.Media.Brush;
+using Brushes = System.Windows.Media.Brushes;
+using Color = System.Windows.Media.Color;
+using Pen = System.Windows.Media.Pen;
+using Point = System.Windows.Point;
+using Size = System.Windows.Size;
+
+namespace PulseDock.App.Controls
+{
+    public class ProgressRingControl : FrameworkElement
+    {
+        public static readonly DependencyProperty ValueProperty =
+            DependencyProperty.Register(
+                nameof(Value),
+                typeof(double),
+                typeof(ProgressRingControl),
+                new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender));
+
+        public static readonly DependencyProperty StrokeThicknessProperty =
+            DependencyProperty.Register(
+                nameof(StrokeThickness),
+                typeof(double),
+                typeof(ProgressRingControl),
+                new FrameworkPropertyMetadata(4.0, FrameworkPropertyMetadataOptions.AffectsRender));
+
+        public static readonly DependencyProperty ProgressBrushProperty =
+            DependencyProperty.Register(
+                nameof(ProgressBrush),
+                typeof(Brush),
+                typeof(ProgressRingControl),
+                new FrameworkPropertyMetadata(Brushes.DarkViolet, FrameworkPropertyMetadataOptions.AffectsRender));
+
+        public double Value
+        {
+            get => (double)GetValue(ValueProperty);
+            set => SetValue(ValueProperty, value);
+        }
+
+        public double StrokeThickness
+        {
+            get => (double)GetValue(StrokeThicknessProperty);
+            set => SetValue(StrokeThicknessProperty, value);
+        }
+
+        public Brush ProgressBrush
+        {
+            get => (Brush)GetValue(ProgressBrushProperty);
+            set => SetValue(ProgressBrushProperty, value);
+        }
+
+        protected override void OnRender(DrawingContext drawingContext)
+        {
+            base.OnRender(drawingContext);
+
+            double width = ActualWidth;
+            double height = ActualHeight;
+            if (width <= 0 || height <= 0) return;
+
+            double radius = (Math.Min(width, height) - StrokeThickness) / 2.0;
+            var center = new Point(width / 2.0, height / 2.0);
+
+            // Background circle
+            var bgPen = new Pen(new SolidColorBrush(Color.FromArgb(40, 255, 255, 255)), StrokeThickness);
+            bgPen.Freeze();
+            drawingContext.DrawEllipse(null, bgPen, center, radius, radius);
+
+            double pct = Math.Clamp(Value, 0.0, 100.0) / 100.0;
+            if (pct <= 0.001) return;
+
+            double angle = pct * 360.0;
+            if (angle >= 360.0) angle = 359.99; // Avoid full circle arc overlap issues
+
+            Point startPoint = new Point(center.X, center.Y - radius);
+            double radians = (angle - 90.0) * (Math.PI / 180.0);
+            Point endPoint = new Point(center.X + radius * Math.Cos(radians), center.Y + radius * Math.Sin(radians));
+
+            bool isLargeArc = angle > 180.0;
+
+            var geometry = new StreamGeometry();
+            using (var ctx = geometry.Open())
+            {
+                ctx.BeginFigure(startPoint, isFilled: false, isClosed: false);
+                ctx.ArcTo(endPoint, new Size(radius, radius), 0, isLargeArc, SweepDirection.Clockwise, isStroked: true, isSmoothJoin: true);
+            }
+            geometry.Freeze();
+
+            var fgPen = new Pen(ProgressBrush, StrokeThickness)
+            {
+                StartLineCap = PenLineCap.Round,
+                EndLineCap = PenLineCap.Round
+            };
+            fgPen.Freeze();
+
+            drawingContext.DrawGeometry(null, fgPen, geometry);
+        }
+    }
+}

src/PulseDock.App/Controls/SparklineControl.cs

@@ -0,0 +1,97 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows;
+using System.Windows.Media;
+using Brush = System.Windows.Media.Brush;
+using Brushes = System.Windows.Media.Brushes;
+using Pen = System.Windows.Media.Pen;
+using Point = System.Windows.Point;
+
+namespace PulseDock.App.Controls
+{
+    public class SparklineControl : FrameworkElement
+    {
+        public static readonly DependencyProperty ValuesProperty =
+            DependencyProperty.Register(
+                nameof(Values),
+                typeof(IEnumerable<float>),
+                typeof(SparklineControl),
+                new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender));
+
+        public static readonly DependencyProperty LineColorProperty =
+            DependencyProperty.Register(
+                nameof(LineColor),
+                typeof(Brush),
+                typeof(SparklineControl),
+                new FrameworkPropertyMetadata(Brushes.Cyan, FrameworkPropertyMetadataOptions.AffectsRender));
+
+        public static readonly DependencyProperty LineThicknessProperty =
+            DependencyProperty.Register(
+                nameof(LineThickness),
+                typeof(double),
+                typeof(SparklineControl),
+                new FrameworkPropertyMetadata(1.5, FrameworkPropertyMetadataOptions.AffectsRender));
+
+        public IEnumerable<float>? Values
+        {
+            get => (IEnumerable<float>?)GetValue(ValuesProperty);
+            set => SetValue(ValuesProperty, value);
+        }
+
+        public Brush LineColor
+        {
+            get => (Brush)GetValue(LineColorProperty);
+            set => SetValue(LineColorProperty, value);
+        }
+
+        public double LineThickness
+        {
+            get => (double)GetValue(LineThicknessProperty);
+            set => SetValue(LineThicknessProperty, value);
+        }
+
+        protected override void OnRender(DrawingContext drawingContext)
+        {
+            base.OnRender(drawingContext);
+
+            var values = Values?.ToArray();
+            if (values == null || values.Length < 2 || ActualWidth <= 0 || ActualHeight <= 0)
+                return;
+
+            double width = ActualWidth;
+            double height = ActualHeight;
+
+            float min = 0f;
+            float max = 100f; // Scale percentage or range dynamically
+            float actualMax = values.Max();
+            if (actualMax > 100f) max = actualMax;
+
+            var geometry = new StreamGeometry();
+            using (var ctx = geometry.Open())
+            {
+                double stepX = width / (values.Length - 1);
+
+                for (int i = 0; i < values.Length; i++)
+                {
+                    double x = i * stepX;
+                    float val = Math.Clamp(values[i], min, max);
+                    double normY = (val - min) / (max - min);
+                    double y = height - (normY * (height - 4)) - 2;
+
+                    var point = new Point(x, y);
+
+                    if (i == 0)
+                        ctx.BeginFigure(point, isFilled: false, isClosed: false);
+                    else
+                        ctx.LineTo(point, isStroked: true, isSmoothJoin: true);
+                }
+            }
+
+            geometry.Freeze();
+            var pen = new Pen(LineColor, LineThickness);
+            pen.Freeze();
+            drawingContext.DrawGeometry(null, pen, geometry);
+        }
+    }
+}

src/PulseDock.App/Converters/BytesToHumanReadableConverter.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace PulseDock.App.Converters
+{
+    public class BytesToHumanReadableConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            long bytes = 0;
+            if (value is long l) bytes = l;
+            else if (value is double d) bytes = (long)d;
+            else if (value is float f) bytes = (long)f;
+
+            string[] suffixes = { "B", "KB", "MB", "GB", "TB" };
+            int order = 0;
+            double len = bytes;
+
+            while (len >= 1024 && order < suffixes.Length - 1)
+            {
+                order++;
+                len /= 1024;
+            }
+
+            return $"{len:F1} {suffixes[order]}";
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            => throw new NotImplementedException();
+    }
+}

src/PulseDock.App/Converters/Converters.cs

@@ -0,0 +1,83 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+using PulseDock.App.Models;
+using Application = System.Windows.Application;
+using Brushes = System.Windows.Media.Brushes;
+
+namespace PulseDock.App.Converters
+{
+    public class ValueToColorConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is AlertStatus status)
+            {
+                return status switch
+                {
+                    AlertStatus.Critical => Application.Current.Resources["CriticalBrush"] ?? Brushes.Red,
+                    AlertStatus.Elevated => Application.Current.Resources["WarningBrush"] ?? Brushes.Orange,
+                    _ => Application.Current.Resources["AccentBrush"] ?? Brushes.Cyan
+                };
+            }
+
+            return Application.Current.Resources["AccentBrush"] ?? Brushes.Cyan;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            => throw new NotImplementedException();
+    }
+
+    public class BooleanToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            bool flag = value is bool b && b;
+            bool invert = parameter?.ToString() == "Inverse";
+
+            if (invert) flag = !flag;
+            return flag ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            => throw new NotImplementedException();
+    }
+
+    public class InverseBooleanConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value is bool b ? !b : false;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value is bool b ? !b : false;
+        }
+    }
+
+    public class WidgetModeToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is WidgetMode currentMode && parameter is string requiredModeStr)
+            {
+                if (Enum.TryParse<WidgetMode>(requiredModeStr, true, out var requiredMode))
+                {
+                    // "StandardOrHigher" or exact matches
+                    if (requiredModeStr.Equals("StandardOrExpanded", StringComparison.OrdinalIgnoreCase))
+                    {
+                        return (currentMode == WidgetMode.Standard || currentMode == WidgetMode.Expanded) ? Visibility.Visible : Visibility.Collapsed;
+                    }
+
+                    return currentMode == requiredMode ? Visibility.Visible : Visibility.Collapsed;
+                }
+            }
+            return Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            => throw new NotImplementedException();
+    }
+}

src/PulseDock.App/Converters/SpeedFormatterConverter.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace PulseDock.App.Converters
+{
+    public class SpeedFormatterConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            double bytesPerSec = 0;
+            if (value is double d) bytesPerSec = d;
+            else if (value is float f) bytesPerSec = f;
+            else if (value is long l) bytesPerSec = l;
+
+            if (bytesPerSec >= 1024 * 1024 * 1024)
+                return $"{bytesPerSec / (1024 * 1024 * 1024):F2} GB/s";
+            if (bytesPerSec >= 1024 * 1024)
+                return $"{bytesPerSec / (1024 * 1024):F1} MB/s";
+            if (bytesPerSec >= 1024)
+                return $"{bytesPerSec / 1024:F0} KB/s";
+
+            return $"{bytesPerSec:F0} B/s";
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            => throw new NotImplementedException();
+    }
+}

src/PulseDock.App/Models/AlertThresholds.cs

@@ -0,0 +1,22 @@
+namespace PulseDock.App.Models
+{
+    public class AlertThresholds
+    {
+        public float CpuElevatedPercent { get; set; } = 80f;
+        public float CpuCriticalPercent { get; set; } = 95f;
+
+        public float MemoryElevatedPercent { get; set; } = 80f;
+        public float MemoryCriticalPercent { get; set; } = 95f;
+
+        public float CpuTempElevatedC { get; set; } = 80f;
+        public float CpuTempCriticalC { get; set; } = 90f;
+
+        public float GpuTempElevatedC { get; set; } = 80f;
+        public float GpuTempCriticalC { get; set; } = 90f;
+
+        public float BatteryLowPercent { get; set; } = 20f;
+        public float BatteryCriticalPercent { get; set; } = 10f;
+
+        public float DiskFreeCriticalPercent { get; set; } = 10f;
+    }
+}

src/PulseDock.App/Models/BatteryMetrics.cs

@@ -0,0 +1,16 @@
+namespace PulseDock.App.Models
+{
+    public class BatteryMetrics
+    {
+        public bool HasBattery { get; set; }
+        public float Percentage { get; set; }
+        public bool IsPluggedIn { get; set; }
+        public bool IsCharging { get; set; }
+        public string EstimatedRemainingTime { get; set; } = "Unbekannt";
+        public string TimeToFull { get; set; } = "Unbekannt";
+        public float? BatteryHealthPercent { get; set; }
+        public float? DesignCapacityMwh { get; set; }
+        public float? FullChargeCapacityMwh { get; set; }
+        public AlertStatus Status { get; set; } = AlertStatus.Normal;
+    }
+}

src/PulseDock.App/Models/CpuMetrics.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+
+namespace PulseDock.App.Models
+{
+    public class CpuMetrics
+    {
+        public string ModelName { get; set; } = "CPU";
+        public float OverallLoadPercent { get; set; }
+        public float CurrentClockGhz { get; set; }
+        public float MaxClockGhz { get; set; }
+        public float? TemperatureC { get; set; }
+        public float? MaxTemperatureC { get; set; }
+        public float? PowerWatts { get; set; }
+        public List<float> CoreLoads { get; set; } = new();
+        public AlertStatus Status { get; set; } = AlertStatus.Normal;
+    }
+}

src/PulseDock.App/Models/DiskMetrics.cs

@@ -0,0 +1,16 @@
+namespace PulseDock.App.Models
+{
+    public class DiskMetrics
+    {
+        public string DriveLetter { get; set; } = "C:";
+        public string Name { get; set; } = "Lokaler Datenträger";
+        public long UsedBytes { get; set; }
+        public long TotalBytes { get; set; }
+        public long FreeBytes { get; set; }
+        public float FreePercent { get; set; }
+        public double ReadBytesPerSec { get; set; }
+        public double WriteBytesPerSec { get; set; }
+        public float? TemperatureC { get; set; }
+        public AlertStatus Status { get; set; } = AlertStatus.Normal;
+    }
+}

src/PulseDock.App/Models/Enums.cs

@@ -0,0 +1,23 @@
+namespace PulseDock.App.Models
+{
+    public enum WidgetMode
+    {
+        Compact,
+        Standard,
+        Expanded
+    }
+
+    public enum ThemeMode
+    {
+        Dark,
+        Light,
+        Auto
+    }
+
+    public enum AlertStatus
+    {
+        Normal,
+        Elevated,
+        Critical
+    }
+}

src/PulseDock.App/Models/GpuMetrics.cs

@@ -0,0 +1,16 @@
+namespace PulseDock.App.Models
+{
+    public class GpuMetrics
+    {
+        public string Name { get; set; } = "GPU";
+        public float LoadPercent { get; set; }
+        public float? TemperatureC { get; set; }
+        public float? ClockMhz { get; set; }
+        public float VramUsedGb { get; set; }
+        public float VramTotalGb { get; set; }
+        public float? PowerWatts { get; set; }
+        public float? FanSpeedPercent { get; set; }
+        public AlertStatus Status { get; set; } = AlertStatus.Normal;
+        public bool IsAvailable { get; set; } = true;
+    }
+}

src/PulseDock.App/Models/MemoryMetrics.cs

@@ -0,0 +1,13 @@
+namespace PulseDock.App.Models
+{
+    public class MemoryMetrics
+    {
+        public float UsedGb { get; set; }
+        public float TotalGb { get; set; }
+        public float AvailableGb { get; set; }
+        public float LoadPercent { get; set; }
+        public AlertStatus Status { get; set; } = AlertStatus.Normal;
+
+        public string FormattedText => $"{UsedGb:F1} GB / {TotalGb:F1} GB – {LoadPercent:F0}%";
+    }
+}

src/PulseDock.App/Models/NetworkMetrics.cs

@@ -0,0 +1,14 @@
+namespace PulseDock.App.Models
+{
+    public class NetworkMetrics
+    {
+        public string AdapterName { get; set; } = "Ethernet / Wi-Fi";
+        public double DownloadBytesPerSec { get; set; }
+        public double UploadBytesPerSec { get; set; }
+        public long TotalBytesDownloaded { get; set; }
+        public long TotalBytesUploaded { get; set; }
+        public string IpAddress { get; set; } = "127.0.0.1";
+        public float? WifiSignalStrengthPercent { get; set; }
+        public bool IsConnected { get; set; } = true;
+    }
+}

src/PulseDock.App/Models/ProcessMetrics.cs

@@ -0,0 +1,12 @@
+namespace PulseDock.App.Models
+{
+    public class ProcessMetrics
+    {
+        public int Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public float CpuPercent { get; set; }
+        public long MemoryBytes { get; set; }
+
+        public string FormattedMemory => $"{MemoryBytes / (1024.0 * 1024.0):F1} MB";
+    }
+}

src/PulseDock.App/PulseDock.App.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UseWPF>true</UseWPF>
+    <UseWindowsForms>true</UseWindowsForms>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="LibreHardwareMonitorLib" Version="0.9.6" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.10" />
+    <PackageReference Include="System.Management" Version="10.0.10" />
+  </ItemGroup>
+
+</Project>

src/PulseDock.App/Services/Implementations/HardwareMonitoringService.cs

@@ -0,0 +1,556 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Net.Sockets;
+using System.Runtime.InteropServices;
+using LibreHardwareMonitor.Hardware;
+using PulseDock.App.Models;
+using PulseDock.App.Services.Interfaces;
+using PulseDock.App.Utilities;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class HardwareMonitoringService : IHardwareMonitoringService
+    {
+        private readonly ILoggerService _logger;
+        private readonly ISettingsService _settingsService;
+        private Computer? _computer;
+        private bool _libreHardwareMonitorInitialized;
+        private bool _requiresAdminElevation;
+
+        // Fallback counters & state tracking
+        private readonly PerformanceCounter? _cpuCounter;
+        private readonly PerformanceCounter? _ramAvailableCounter;
+        private NetworkInterface? _activeNetworkInterface;
+        private long _lastNetBytesReceived;
+        private long _lastNetBytesSent;
+        private DateTime _lastNetSampleTime = DateTime.MinValue;
+
+        private float _maxCpuTempSeen;
+        private readonly Dictionary<string, (long lastReadBytes, long lastWriteBytes, DateTime time)> _diskActivityCache = new();
+
+        public bool RequiresAdminElevation => _requiresAdminElevation;
+
+        public HardwareMonitoringService(ILoggerService logger, ISettingsService settingsService)
+        {
+            _logger = logger;
+            _settingsService = settingsService;
+
+            InitializeLibreHardwareMonitor();
+
+            try
+            {
+                _cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total", readOnly: true);
+                _cpuCounter.NextValue();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"PerformanceCounter Processor setup fallback skipped: {ex.Message}");
+            }
+
+            try
+            {
+                _ramAvailableCounter = new PerformanceCounter("Memory", "Available MBytes", readOnly: true);
+                _ramAvailableCounter.NextValue();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"PerformanceCounter Memory setup fallback skipped: {ex.Message}");
+            }
+
+            SelectActiveNetworkInterface();
+        }
+
+        private void InitializeLibreHardwareMonitor()
+        {
+            try
+            {
+                _computer = new Computer
+                {
+                    IsCpuEnabled = true,
+                    IsGpuEnabled = true,
+                    IsMemoryEnabled = true,
+                    IsMotherboardEnabled = true,
+                    IsStorageEnabled = true,
+                    IsControllerEnabled = true
+                };
+
+                _computer.Open();
+                _libreHardwareMonitorInitialized = true;
+                _logger.LogInfo("LibreHardwareMonitor initialized successfully.");
+            }
+            catch (Exception ex)
+            {
+                _libreHardwareMonitorInitialized = false;
+                _requiresAdminElevation = true;
+                _logger.LogWarning($"LibreHardwareMonitor failed to open (possibly running without admin rights). Using standard APIs as fallback. Error: {ex.Message}");
+            }
+        }
+
+        public void RefreshSensors()
+        {
+            if (!_libreHardwareMonitorInitialized || _computer == null) return;
+
+            try
+            {
+                foreach (var hardware in _computer.Hardware)
+                {
+                    hardware.Update();
+                    foreach (var subHardware in hardware.SubHardware)
+                    {
+                        subHardware.Update();
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"Error updating LibreHardwareMonitor sensors: {ex.Message}");
+            }
+        }
+
+        public CpuMetrics GetCpuMetrics()
+        {
+            var cpu = new CpuMetrics
+            {
+                ModelName = Environment.GetEnvironmentVariable("PROCESSOR_IDENTIFIER") ?? "Intel/AMD CPU"
+            };
+
+            float? totalLoad = null;
+            float? maxClock = null;
+            float? currentClock = null;
+            float? cpuTemp = null;
+            float? cpuPower = null;
+            var coreLoads = new List<float>();
+
+            if (_libreHardwareMonitorInitialized && _computer != null)
+            {
+                var cpuHardware = _computer.Hardware.FirstOrDefault(h => h.HardwareType == HardwareType.Cpu);
+                if (cpuHardware != null)
+                {
+                    cpu.ModelName = cpuHardware.Name;
+
+                    foreach (var sensor in cpuHardware.Sensors)
+                    {
+                        if (sensor.SensorType == SensorType.Load)
+                        {
+                            if (sensor.Name.Contains("Total") || sensor.Name.Equals("CPU Total", StringComparison.OrdinalIgnoreCase))
+                            {
+                                totalLoad = sensor.Value;
+                            }
+                            else if (sensor.Name.Contains("Core #"))
+                            {
+                                if (sensor.Value.HasValue) coreLoads.Add(sensor.Value.Value);
+                            }
+                        }
+                        else if (sensor.SensorType == SensorType.Clock)
+                        {
+                            if (sensor.Value.HasValue)
+                            {
+                                var clockGhz = sensor.Value.Value / 1000f;
+                                if (!currentClock.HasValue || clockGhz > currentClock.Value)
+                                    currentClock = clockGhz;
+                                if (!maxClock.HasValue || clockGhz > maxClock.Value)
+                                    maxClock = clockGhz;
+                            }
+                        }
+                        else if (sensor.SensorType == SensorType.Temperature)
+                        {
+                            if (sensor.Name.Contains("Package") || sensor.Name.Contains("Total") || sensor.Name.Contains("Core Max"))
+                            {
+                                if (sensor.Value.HasValue && (!cpuTemp.HasValue || sensor.Value.Value > cpuTemp.Value))
+                                    cpuTemp = sensor.Value;
+                            }
+                        }
+                        else if (sensor.SensorType == SensorType.Power)
+                        {
+                            if (sensor.Name.Contains("Package") || sensor.Name.Contains("Total"))
+                            {
+                                cpuPower = sensor.Value;
+                            }
+                        }
+                    }
+                }
+            }
+
+            // Fallback load if needed
+            if (!totalLoad.HasValue)
+            {
+                try
+                {
+                    totalLoad = _cpuCounter?.NextValue() ?? 0f;
+                }
+                catch
+                {
+                    totalLoad = 0f;
+                }
+            }
+
+            cpu.OverallLoadPercent = Math.Clamp(totalLoad ?? 0f, 0f, 100f);
+            cpu.CurrentClockGhz = currentClock ?? 3.2f;
+            cpu.MaxClockGhz = maxClock ?? 4.5f;
+            cpu.TemperatureC = cpuTemp;
+            cpu.PowerWatts = cpuPower;
+            cpu.CoreLoads = coreLoads.Count > 0 ? coreLoads : new List<float> { cpu.OverallLoadPercent };
+
+            if (cpuTemp.HasValue)
+            {
+                if (cpuTemp.Value > _maxCpuTempSeen) _maxCpuTempSeen = cpuTemp.Value;
+                cpu.MaxTemperatureC = _maxCpuTempSeen;
+            }
+
+            // Status thresholds
+            var thresholds = _settingsService.Current.Thresholds;
+            if (cpu.OverallLoadPercent >= thresholds.CpuCriticalPercent || (cpu.TemperatureC.HasValue && cpu.TemperatureC.Value >= thresholds.CpuTempCriticalC))
+            {
+                cpu.Status = AlertStatus.Critical;
+            }
+            else if (cpu.OverallLoadPercent >= thresholds.CpuElevatedPercent || (cpu.TemperatureC.HasValue && cpu.TemperatureC.Value >= thresholds.CpuTempElevatedC))
+            {
+                cpu.Status = AlertStatus.Elevated;
+            }
+
+            return cpu;
+        }
+
+        public MemoryMetrics GetMemoryMetrics()
+        {
+            var mem = new MemoryMetrics();
+
+            float? usedGb = null;
+            float? totalGb = null;
+
+            if (_libreHardwareMonitorInitialized && _computer != null)
+            {
+                var memHardware = _computer.Hardware.FirstOrDefault(h => h.HardwareType == HardwareType.Memory);
+                if (memHardware != null)
+                {
+                    foreach (var sensor in memHardware.Sensors)
+                    {
+                        if (sensor.SensorType == SensorType.Data)
+                        {
+                            if (sensor.Name.Equals("Memory Used", StringComparison.OrdinalIgnoreCase))
+                                usedGb = sensor.Value;
+                            else if (sensor.Name.Equals("Memory Available", StringComparison.OrdinalIgnoreCase))
+                                mem.AvailableGb = sensor.Value ?? 0f;
+                        }
+                        else if (sensor.SensorType == SensorType.Load && sensor.Name.Equals("Memory", StringComparison.OrdinalIgnoreCase))
+                        {
+                            mem.LoadPercent = sensor.Value ?? 0f;
+                        }
+                    }
+                }
+            }
+
+            // Win32 GlobalMemoryStatusEx Fallback
+            if (!usedGb.HasValue || totalGb == null || totalGb == 0)
+            {
+                var memStatus = GetWindowsMemoryStatus();
+                totalGb = memStatus.totalGb;
+                usedGb = memStatus.usedGb;
+                mem.AvailableGb = memStatus.availGb;
+                mem.LoadPercent = memStatus.loadPercent;
+            }
+
+            mem.TotalGb = totalGb ?? 16f;
+            mem.UsedGb = usedGb ?? 8f;
+
+            var thresholds = _settingsService.Current.Thresholds;
+            if (mem.LoadPercent >= thresholds.MemoryCriticalPercent) mem.Status = AlertStatus.Critical;
+            else if (mem.LoadPercent >= thresholds.MemoryElevatedPercent) mem.Status = AlertStatus.Elevated;
+
+            return mem;
+        }
+
+        public GpuMetrics GetGpuMetrics()
+        {
+            var gpu = new GpuMetrics();
+
+            if (_libreHardwareMonitorInitialized && _computer != null)
+            {
+                var gpuHardware = _computer.Hardware.FirstOrDefault(h =>
+                    h.HardwareType == HardwareType.GpuNvidia ||
+                    h.HardwareType == HardwareType.GpuAmd ||
+                    h.HardwareType == HardwareType.GpuIntel);
+
+                if (gpuHardware != null)
+                {
+                    gpu.Name = gpuHardware.Name;
+                    gpu.IsAvailable = true;
+
+                    foreach (var sensor in gpuHardware.Sensors)
+                    {
+                        if (sensor.SensorType == SensorType.Load && sensor.Name.Contains("Core"))
+                            gpu.LoadPercent = sensor.Value ?? 0f;
+                        else if (sensor.SensorType == SensorType.Temperature && sensor.Name.Contains("Core"))
+                            gpu.TemperatureC = sensor.Value;
+                        else if (sensor.SensorType == SensorType.Clock && sensor.Name.Contains("Core"))
+                            gpu.ClockMhz = sensor.Value;
+                        else if (sensor.SensorType == SensorType.Power && sensor.Name.Contains("Package"))
+                            gpu.PowerWatts = sensor.Value;
+                        else if (sensor.SensorType == SensorType.SmallData && sensor.Name.Contains("Used"))
+                            gpu.VramUsedGb = (sensor.Value ?? 0f) / 1024f;
+                        else if (sensor.SensorType == SensorType.SmallData && sensor.Name.Contains("Total"))
+                            gpu.VramTotalGb = (sensor.Value ?? 0f) / 1024f;
+                        else if (sensor.SensorType == SensorType.Fan)
+                            gpu.FanSpeedPercent = sensor.Value;
+                    }
+                }
+                else
+                {
+                    gpu.IsAvailable = false;
+                    gpu.Name = "Keine dedizierte GPU";
+                }
+            }
+            else
+            {
+                gpu.IsAvailable = false;
+                gpu.Name = "Nicht verfügbar";
+            }
+
+            var thresholds = _settingsService.Current.Thresholds;
+            if (gpu.TemperatureC.HasValue && gpu.TemperatureC.Value >= thresholds.GpuTempCriticalC)
+                gpu.Status = AlertStatus.Critical;
+            else if (gpu.TemperatureC.HasValue && gpu.TemperatureC.Value >= thresholds.GpuTempElevatedC)
+                gpu.Status = AlertStatus.Elevated;
+
+            return gpu;
+        }
+
+        public BatteryMetrics GetBatteryMetrics()
+        {
+            var battery = new BatteryMetrics();
+
+            if (Win32Api.GetSystemPowerStatus(out var sps))
+            {
+                // BatteryFlag == 128 means No Battery
+                if (sps.BatteryFlag == 128 || sps.BatteryFlag == 255)
+                {
+                    battery.HasBattery = false;
+                    return battery;
+                }
+
+                battery.HasBattery = true;
+                battery.IsPluggedIn = sps.ACLineStatus == 1;
+                battery.Percentage = sps.BatteryLifePercent <= 100 ? sps.BatteryLifePercent : 100;
+                battery.IsCharging = (sps.BatteryFlag & 8) != 0;
+
+                if (sps.BatteryLifeTime != 0xFFFFFFFF)
+                {
+                    var ts = TimeSpan.FromSeconds(sps.BatteryLifeTime);
+                    battery.EstimatedRemainingTime = $"{ts.Hours}h {ts.Minutes}m";
+                }
+                else
+                {
+                    battery.EstimatedRemainingTime = battery.IsPluggedIn ? "Netzbetrieb" : "Wird berechnet...";
+                }
+
+                var thresholds = _settingsService.Current.Thresholds;
+                if (!battery.IsPluggedIn)
+                {
+                    if (battery.Percentage <= thresholds.BatteryCriticalPercent)
+                        battery.Status = AlertStatus.Critical;
+                    else if (battery.Percentage <= thresholds.BatteryLowPercent)
+                        battery.Status = AlertStatus.Elevated;
+                }
+            }
+            else
+            {
+                battery.HasBattery = false;
+            }
+
+            return battery;
+        }
+
+        public List<DiskMetrics> GetDiskMetrics()
+        {
+            var result = new List<DiskMetrics>();
+
+            try
+            {
+                var drives = DriveInfo.GetDrives().Where(d => d.IsReady && d.DriveType == DriveType.Fixed);
+                foreach (var drive in drives)
+                {
+                    var total = drive.TotalSize;
+                    var free = drive.AvailableFreeSpace;
+                    var used = total - free;
+                    var freePercent = total > 0 ? (float)((double)free / total * 100.0) : 0f;
+
+                    var disk = new DiskMetrics
+                    {
+                        DriveLetter = drive.Name.TrimEnd('\\'),
+                        Name = string.IsNullOrEmpty(drive.VolumeLabel) ? "Lokaler Datenträger" : drive.VolumeLabel,
+                        TotalBytes = total,
+                        FreeBytes = free,
+                        UsedBytes = used,
+                        FreePercent = freePercent
+                    };
+
+                    if (freePercent <= _settingsService.Current.Thresholds.DiskFreeCriticalPercent)
+                    {
+                        disk.Status = AlertStatus.Critical;
+                    }
+
+                    result.Add(disk);
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Error enumerating drives", ex);
+            }
+
+            return result;
+        }
+
+        public NetworkMetrics GetNetworkMetrics()
+        {
+            var metrics = new NetworkMetrics();
+            SelectActiveNetworkInterface();
+
+            if (_activeNetworkInterface != null)
+            {
+                try
+                {
+                    metrics.AdapterName = _activeNetworkInterface.Name;
+                    metrics.IsConnected = _activeNetworkInterface.OperationalStatus == OperationalStatus.Up;
+
+                    var stats = _activeNetworkInterface.GetIPv4Statistics();
+                    var now = DateTime.UtcNow;
+
+                    if (_lastNetSampleTime != DateTime.MinValue)
+                    {
+                        var elapsedSec = (now - _lastNetSampleTime).TotalSeconds;
+                        if (elapsedSec > 0)
+                        {
+                            var rxDelta = stats.BytesReceived - _lastNetBytesReceived;
+                            var txDelta = stats.BytesSent - _lastNetBytesSent;
+
+                            metrics.DownloadBytesPerSec = Math.Max(0, rxDelta / elapsedSec);
+                            metrics.UploadBytesPerSec = Math.Max(0, txDelta / elapsedSec);
+                        }
+                    }
+
+                    _lastNetBytesReceived = stats.BytesReceived;
+                    _lastNetBytesSent = stats.BytesSent;
+                    _lastNetSampleTime = now;
+
+                    metrics.TotalBytesDownloaded = stats.BytesReceived;
+                    metrics.TotalBytesUploaded = stats.BytesSent;
+
+                    // IP Address
+                    var ipProps = _activeNetworkInterface.GetIPProperties();
+                    var unicast = ipProps.UnicastAddresses.FirstOrDefault(u => u.Address.AddressFamily == AddressFamily.InterNetwork);
+                    metrics.IpAddress = unicast?.Address.ToString() ?? "127.0.0.1";
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogWarning($"Error reading network stats: {ex.Message}");
+                }
+            }
+            else
+            {
+                metrics.IsConnected = false;
+                metrics.AdapterName = "Keine Verbindung";
+            }
+
+            return metrics;
+        }
+
+        public List<ProcessMetrics> GetTopProcesses(int count = 3)
+        {
+            var result = new List<ProcessMetrics>();
+            try
+            {
+                var processes = Process.GetProcesses()
+                    .Where(p => !string.IsNullOrEmpty(p.ProcessName) && p.Id != 0)
+                    .OrderByDescending(p =>
+                    {
+                        try { return p.WorkingSet64; } catch { return 0L; }
+                    })
+                    .Take(count);
+
+                foreach (var p in processes)
+                {
+                    try
+                    {
+                        result.Add(new ProcessMetrics
+                        {
+                            Id = p.Id,
+                            Name = p.ProcessName,
+                            MemoryBytes = p.WorkingSet64,
+                            CpuPercent = 0 // Approximate for quick non-blocking fetch
+                        });
+                    }
+                    catch
+                    {
+                        // Process exited
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"Error fetching top processes: {ex.Message}");
+            }
+
+            return result;
+        }
+
+        private void SelectActiveNetworkInterface()
+        {
+            try
+            {
+                var interfaces = NetworkInterface.GetAllNetworkInterfaces()
+                    .Where(n => n.OperationalStatus == OperationalStatus.Up &&
+                                n.NetworkInterfaceType != NetworkInterfaceType.Loopback &&
+                                !n.Description.Contains("Virtual", StringComparison.OrdinalIgnoreCase) &&
+                                !n.Description.Contains("Pseudo", StringComparison.OrdinalIgnoreCase));
+
+                _activeNetworkInterface = interfaces.FirstOrDefault();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"Error finding active network interface: {ex.Message}");
+            }
+        }
+
+        private (float totalGb, float usedGb, float availGb, float loadPercent) GetWindowsMemoryStatus()
+        {
+            try
+            {
+                var gcMem = GC.GetGCMemoryInfo();
+                long totalBytes = gcMem.TotalAvailableMemoryBytes;
+                if (totalBytes > 0)
+                {
+                    float totalG = totalBytes / (1024f * 1024f * 1024f);
+                    float availMb = _ramAvailableCounter?.NextValue() ?? (totalG * 0.4f * 1024f);
+                    float availG = availMb / 1024f;
+                    float usedG = Math.Max(0f, totalG - availG);
+                    float load = (usedG / totalG) * 100f;
+                    return (totalG, usedG, availG, load);
+                }
+            }
+            catch
+            {
+                // Fallback
+            }
+
+            return (16.0f, 8.0f, 8.0f, 50.0f);
+        }
+
+        public void Dispose()
+        {
+            try
+            {
+                _computer?.Close();
+                _cpuCounter?.Dispose();
+                _ramAvailableCounter?.Dispose();
+            }
+            catch
+            {
+            }
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/LoggerService.cs

@@ -0,0 +1,69 @@
+using System;
+using System.IO;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class LoggerService : Interfaces.ILoggerService
+    {
+        private readonly string _logDir;
+        private readonly string _logFilePath;
+        private readonly object _lock = new();
+        private const long MaxLogFileSizeBytes = 2 * 1024 * 1024; // 2 MB
+
+        public LoggerService()
+        {
+            var appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+            _logDir = Path.Combine(appData, "PulseDock", "logs");
+            Directory.CreateDirectory(_logDir);
+            _logFilePath = Path.Combine(_logDir, "pulse_dock.log");
+        }
+
+        public void LogInfo(string message) => WriteLog("INFO", message);
+        public void LogWarning(string message) => WriteLog("WARN", message);
+        public void LogError(string message, Exception? exception = null)
+        {
+            var fullMessage = exception != null ? $"{message} | Exception: {exception}" : message;
+            WriteLog("ERROR", fullMessage);
+        }
+
+        private void WriteLog(string level, string message)
+        {
+            lock (_lock)
+            {
+                try
+                {
+                    RotateLogsIfNeeded();
+                    var line = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}] [{level}] {message}{Environment.NewLine}";
+                    File.AppendAllText(_logFilePath, line);
+                }
+                catch
+                {
+                    // Fail silently to avoid crash from logger
+                }
+            }
+        }
+
+        private void RotateLogsIfNeeded()
+        {
+            if (!File.Exists(_logFilePath)) return;
+
+            var fileInfo = new FileInfo(_logFilePath);
+            if (fileInfo.Length >= MaxLogFileSizeBytes)
+            {
+                var backupPath = Path.Combine(_logDir, $"pulse_dock_{DateTime.Now:yyyyMMdd_HHmmss}.log");
+                File.Move(_logFilePath, backupPath);
+
+                // Keep only top 3 oldest logs
+                var oldLogs = Directory.GetFiles(_logDir, "pulse_dock_*.log");
+                if (oldLogs.Length > 3)
+                {
+                    Array.Sort(oldLogs);
+                    for (int i = 0; i < oldLogs.Length - 3; i++)
+                    {
+                        try { File.Delete(oldLogs[i]); } catch { }
+                    }
+                }
+            }
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/NotificationService.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Media;
+using PulseDock.App.Services.Interfaces;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class NotificationService : INotificationService
+    {
+        private readonly ISettingsService _settingsService;
+        private readonly ILoggerService _logger;
+        private readonly Dictionary<string, DateTime> _lastNotificationTimes = new();
+
+        public NotificationService(ISettingsService settingsService, ILoggerService logger)
+        {
+            _settingsService = settingsService;
+            _logger = logger;
+        }
+
+        public void SendNotification(string title, string message, bool isCritical = false)
+        {
+            var key = $"{title}_{message}";
+            var cooldown = TimeSpan.FromSeconds(_settingsService.Current.NotificationCooldownSeconds);
+
+            if (_lastNotificationTimes.TryGetValue(key, out var lastTime) && (DateTime.Now - lastTime) < cooldown)
+            {
+                // In cooldown period, skip duplicate notification
+                return;
+            }
+
+            _lastNotificationTimes[key] = DateTime.Now;
+            _logger.LogWarning($"[NOTIFICATION] {title}: {message}");
+
+            if (isCritical && _settingsService.Current.EnableSoundAlerts)
+            {
+                try
+                {
+                    SystemSounds.Exclamation.Play();
+                }
+                catch
+                {
+                }
+            }
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/SettingsService.cs

@@ -0,0 +1,101 @@
+using System;
+using System.IO;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using PulseDock.App.Configuration;
+using PulseDock.App.Services.Interfaces;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class SettingsService : ISettingsService
+    {
+        private readonly string _settingsFilePath;
+        private readonly ILoggerService _logger;
+        private AppSettings _currentSettings;
+
+        public AppSettings Current => _currentSettings;
+
+        public event EventHandler<AppSettings>? SettingsChanged;
+
+        private static readonly JsonSerializerOptions Options = new()
+        {
+            WriteIndented = true,
+            Converters = { new JsonStringEnumConverter() }
+        };
+
+        public SettingsService(ILoggerService logger)
+        {
+            _logger = logger;
+            var appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+            var settingsDir = Path.Combine(appData, "PulseDock");
+            Directory.CreateDirectory(settingsDir);
+            _settingsFilePath = Path.Combine(settingsDir, "settings.json");
+            _currentSettings = new AppSettings();
+
+            LoadSettings();
+        }
+
+        public void LoadSettings()
+        {
+            try
+            {
+                if (File.Exists(_settingsFilePath))
+                {
+                    var json = File.ReadAllText(_settingsFilePath);
+                    var deserialized = JsonSerializer.Deserialize<AppSettings>(json, Options);
+                    if (deserialized != null)
+                    {
+                        _currentSettings = deserialized;
+                        _logger.LogInfo("Settings loaded successfully.");
+                        return;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Corrupted settings file detected. Creating backup and restoring defaults.", ex);
+                BackupCorruptedSettings();
+            }
+
+            _currentSettings = new AppSettings();
+            SaveSettings();
+        }
+
+        public void SaveSettings()
+        {
+            try
+            {
+                var json = JsonSerializer.Serialize(_currentSettings, Options);
+                File.WriteAllText(_settingsFilePath, json);
+                _logger.LogInfo("Settings saved successfully.");
+                SettingsChanged?.Invoke(this, _currentSettings);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Failed to save settings.", ex);
+            }
+        }
+
+        public void ResetToDefaults()
+        {
+            _currentSettings = new AppSettings();
+            SaveSettings();
+        }
+
+        private void BackupCorruptedSettings()
+        {
+            try
+            {
+                if (File.Exists(_settingsFilePath))
+                {
+                    var backupPath = _settingsFilePath + $".corrupt_{DateTime.Now:yyyyMMdd_HHmmss}.bak";
+                    File.Copy(_settingsFilePath, backupPath, overwrite: true);
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Failed to create corrupted settings backup.", ex);
+            }
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/StartupService.cs

@@ -0,0 +1,60 @@
+using System;
+using Microsoft.Win32;
+using PulseDock.App.Services.Interfaces;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class StartupService : IStartupService
+    {
+        private const string RunRegistryKeyPath = @"Software\Microsoft\Windows\CurrentVersion\Run";
+        private const string AppName = "PulseDock";
+        private readonly ILoggerService _logger;
+
+        public StartupService(ILoggerService logger)
+        {
+            _logger = logger;
+        }
+
+        public bool IsAutostartEnabled()
+        {
+            try
+            {
+                using var key = Registry.CurrentUser.OpenSubKey(RunRegistryKeyPath, writable: false);
+                var value = key?.GetValue(AppName) as string;
+                return !string.IsNullOrEmpty(value);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Failed to read autostart registry state.", ex);
+                return false;
+            }
+        }
+
+        public bool SetAutostart(bool enable)
+        {
+            try
+            {
+                using var key = Registry.CurrentUser.OpenSubKey(RunRegistryKeyPath, writable: true);
+                if (key == null) return false;
+
+                if (enable)
+                {
+                    var exePath = Environment.ProcessPath ?? System.Reflection.Assembly.GetExecutingAssembly().Location;
+                    key.SetValue(AppName, $"\"{exePath}\"");
+                    _logger.LogInfo("Autostart registry entry created.");
+                }
+                else
+                {
+                    key.DeleteValue(AppName, false);
+                    _logger.LogInfo("Autostart registry entry removed.");
+                }
+                return true;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError($"Failed to update autostart status to {enable}", ex);
+                return false;
+            }
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/ThemeService.cs

@@ -0,0 +1,80 @@
+using System;
+using Microsoft.Win32;
+using PulseDock.App.Services.Interfaces;
+using AppThemeMode = PulseDock.App.Models.ThemeMode;
+using Application = System.Windows.Application;
+using Color = System.Windows.Media.Color;
+using ColorConverter = System.Windows.Media.ColorConverter;
+using SolidColorBrush = System.Windows.Media.SolidColorBrush;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class ThemeService : IThemeService
+    {
+        private readonly ILoggerService _logger;
+
+        public ThemeService(ILoggerService logger)
+        {
+            _logger = logger;
+        }
+
+        public bool IsWindowsInDarkMode()
+        {
+            try
+            {
+                using var key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize");
+                var value = key?.GetValue("AppsUseLightTheme");
+                if (value is int intValue)
+                {
+                    return intValue == 0;
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"Could not read Windows theme state: {ex.Message}");
+            }
+            return true; // Default to dark mode if unreadable
+        }
+
+        public void ApplyTheme(AppThemeMode themeMode, string accentColorHex, double opacity)
+        {
+            bool useDark = themeMode switch
+            {
+                AppThemeMode.Dark => true,
+                AppThemeMode.Light => false,
+                AppThemeMode.Auto => IsWindowsInDarkMode(),
+                _ => true
+            };
+
+            var appResources = Application.Current?.Resources;
+            if (appResources == null) return;
+
+            Color accentColor;
+            try
+            {
+                accentColor = (Color)ColorConverter.ConvertFromString(accentColorHex);
+            }
+            catch
+            {
+                accentColor = Color.FromRgb(138, 43, 226); // Default Electric Purple
+            }
+
+            Color baseBgColor = useDark ? Color.FromRgb(15, 18, 24) : Color.FromRgb(245, 247, 250);
+            byte alpha = (byte)(Math.Clamp(opacity, 0.1, 1.0) * 255);
+            Color glassBgColor = Color.FromArgb(alpha, baseBgColor.R, baseBgColor.G, baseBgColor.B);
+
+            Color textColor = useDark ? System.Windows.Media.Colors.White : Color.FromRgb(20, 24, 30);
+            Color textSecondaryColor = useDark ? Color.FromRgb(170, 180, 195) : Color.FromRgb(90, 100, 115);
+            Color borderBrushColor = useDark ? Color.FromArgb(60, 255, 255, 255) : Color.FromArgb(40, 0, 0, 0);
+
+            appResources["GlassBackgroundBrush"] = new SolidColorBrush(glassBgColor);
+            appResources["AccentBrush"] = new SolidColorBrush(accentColor);
+            appResources["TextPrimaryBrush"] = new SolidColorBrush(textColor);
+            appResources["TextSecondaryBrush"] = new SolidColorBrush(textSecondaryColor);
+            appResources["BorderBrush"] = new SolidColorBrush(borderBrushColor);
+            appResources["WarningBrush"] = new SolidColorBrush(Color.FromRgb(255, 140, 0)); // Orange
+            appResources["CriticalBrush"] = new SolidColorBrush(Color.FromRgb(235, 50, 50)); // Red
+            appResources["NormalBrush"] = new SolidColorBrush(Color.FromRgb(46, 204, 113)); // Green
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/TrayIconService.cs

@@ -0,0 +1,118 @@
+using System;
+using System.Drawing;
+using PulseDock.App.Models;
+using PulseDock.App.Services.Interfaces;
+using ContextMenuStrip = System.Windows.Forms.ContextMenuStrip;
+using NotifyIcon = System.Windows.Forms.NotifyIcon;
+using ToolStripMenuItem = System.Windows.Forms.ToolStripMenuItem;
+using ToolStripSeparator = System.Windows.Forms.ToolStripSeparator;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class TrayIconService : ITrayIconService
+    {
+        private NotifyIcon? _notifyIcon;
+        private readonly ISettingsService _settingsService;
+        private readonly Action _onShowSettings;
+        private readonly Action _onShowAbout;
+        private readonly Action _onRefreshSensors;
+        private readonly Action<WidgetMode> _onSwitchMode;
+        private readonly Action _onToggleLockPosition;
+        private readonly Action _onToggleAlwaysOnTop;
+        private readonly Action _onExitApp;
+        private readonly Action _onToggleVisibility;
+
+        public TrayIconService(
+            ISettingsService settingsService,
+            Action onShowSettings,
+            Action onShowAbout,
+            Action onRefreshSensors,
+            Action<WidgetMode> onSwitchMode,
+            Action onToggleLockPosition,
+            Action onToggleAlwaysOnTop,
+            Action onExitApp,
+            Action onToggleVisibility)
+        {
+            _settingsService = settingsService;
+            _onShowSettings = onShowSettings;
+            _onShowAbout = onShowAbout;
+            _onRefreshSensors = onRefreshSensors;
+            _onSwitchMode = onSwitchMode;
+            _onToggleLockPosition = onToggleLockPosition;
+            _onToggleAlwaysOnTop = onToggleAlwaysOnTop;
+            _onExitApp = onExitApp;
+            _onToggleVisibility = onToggleVisibility;
+        }
+
+        public void Initialize()
+        {
+            _notifyIcon = new NotifyIcon
+            {
+                Text = "PulseDock System Monitor",
+                Icon = SystemIcons.Application,
+                Visible = _settingsService.Current.UseSystemTray
+            };
+
+            _notifyIcon.DoubleClick += (s, e) => _onToggleVisibility();
+
+            RebuildContextMenu();
+        }
+
+        public void ShowTrayIcon(bool visible)
+        {
+            if (_notifyIcon != null)
+            {
+                _notifyIcon.Visible = visible;
+            }
+        }
+
+        public void RebuildContextMenu()
+        {
+            if (_notifyIcon == null) return;
+
+            var contextMenu = new ContextMenuStrip();
+
+            contextMenu.Items.Add("PulseDock anzeigen / ausblenden", null, (s, e) => _onToggleVisibility());
+            contextMenu.Items.Add(new ToolStripSeparator());
+
+            var modeMenu = new ToolStripMenuItem("Anzeigemodus");
+            modeMenu.DropDownItems.Add("Kompakt", null, (s, e) => _onSwitchMode(WidgetMode.Compact));
+            modeMenu.DropDownItems.Add("Standard", null, (s, e) => _onSwitchMode(WidgetMode.Standard));
+            modeMenu.DropDownItems.Add("Erweitert", null, (s, e) => _onSwitchMode(WidgetMode.Expanded));
+            contextMenu.Items.Add(modeMenu);
+
+            var lockItem = new ToolStripMenuItem("Position sperren")
+            {
+                Checked = _settingsService.Current.PositionLocked
+            };
+            lockItem.Click += (s, e) => _onToggleLockPosition();
+            contextMenu.Items.Add(lockItem);
+
+            var topItem = new ToolStripMenuItem("Immer im Vordergrund")
+            {
+                Checked = _settingsService.Current.AlwaysOnTop
+            };
+            topItem.Click += (s, e) => _onToggleAlwaysOnTop();
+            contextMenu.Items.Add(topItem);
+
+            contextMenu.Items.Add("Sensoren aktualisieren", null, (s, e) => _onRefreshSensors());
+            contextMenu.Items.Add(new ToolStripSeparator());
+            contextMenu.Items.Add("Einstellungen...", null, (s, e) => _onShowSettings());
+            contextMenu.Items.Add("Über PulseDock...", null, (s, e) => _onShowAbout());
+            contextMenu.Items.Add(new ToolStripSeparator());
+            contextMenu.Items.Add("Beenden", null, (s, e) => _onExitApp());
+
+            _notifyIcon.ContextMenuStrip = contextMenu;
+        }
+
+        public void Dispose()
+        {
+            if (_notifyIcon != null)
+            {
+                _notifyIcon.Visible = false;
+                _notifyIcon.Dispose();
+                _notifyIcon = null;
+            }
+        }
+    }
+}

src/PulseDock.App/Services/Implementations/WidgetPositionService.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Windows;
+using PulseDock.App.Services.Interfaces;
+using PulseDock.App.Utilities;
+using Point = System.Windows.Point;
+
+namespace PulseDock.App.Services.Implementations
+{
+    public class WidgetPositionService : IWidgetPositionService
+    {
+        private readonly ISettingsService _settingsService;
+        private readonly ILoggerService _logger;
+
+        public WidgetPositionService(ISettingsService settingsService, ILoggerService logger)
+        {
+            _settingsService = settingsService;
+            _logger = logger;
+        }
+
+        public Point EnsureVisiblePosition(double currentX, double currentY, double width, double height)
+        {
+            // Default screen dimensions
+            double minX = SystemParameters.VirtualScreenLeft;
+            double minY = SystemParameters.VirtualScreenTop;
+            double maxX = minX + SystemParameters.VirtualScreenWidth - width;
+            double maxY = minY + SystemParameters.VirtualScreenHeight - height;
+
+            double clampedX = Math.Clamp(currentX, minX, Math.Max(minX, maxX));
+            double clampedY = Math.Clamp(currentY, minY, Math.Max(minY, maxY));
+
+            if (Math.Abs(clampedX - currentX) > 1.0 || Math.Abs(clampedY - currentY) > 1.0)
+            {
+                _logger.LogInfo($"Widget position adjusted from ({currentX:F0}, {currentY:F0}) to visible area ({clampedX:F0}, {clampedY:F0}).");
+            }
+
+            return new Point(clampedX, clampedY);
+        }
+
+        public void SavePosition(double x, double y)
+        {
+            _settingsService.Current.PositionX = x;
+            _settingsService.Current.PositionY = y;
+            _settingsService.SaveSettings();
+        }
+    }
+}

src/PulseDock.App/Services/Interfaces/IHardwareMonitoringService.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using PulseDock.App.Models;
+
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface IHardwareMonitoringService : IDisposable
+    {
+        CpuMetrics GetCpuMetrics();
+        MemoryMetrics GetMemoryMetrics();
+        GpuMetrics GetGpuMetrics();
+        BatteryMetrics GetBatteryMetrics();
+        List<DiskMetrics> GetDiskMetrics();
+        NetworkMetrics GetNetworkMetrics();
+        List<ProcessMetrics> GetTopProcesses(int count = 3);
+        void RefreshSensors();
+        bool RequiresAdminElevation { get; }
+    }
+}

src/PulseDock.App/Services/Interfaces/ILoggerService.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface ILoggerService
+    {
+        void LogInfo(string message);
+        void LogWarning(string message);
+        void LogError(string message, Exception? exception = null);
+    }
+}

src/PulseDock.App/Services/Interfaces/INotificationService.cs

@@ -0,0 +1,7 @@
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface INotificationService
+    {
+        void SendNotification(string title, string message, bool isCritical = false);
+    }
+}

src/PulseDock.App/Services/Interfaces/ISettingsService.cs

@@ -0,0 +1,14 @@
+using System;
+using PulseDock.App.Configuration;
+
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface ISettingsService
+    {
+        AppSettings Current { get; }
+        event EventHandler<AppSettings>? SettingsChanged;
+        void LoadSettings();
+        void SaveSettings();
+        void ResetToDefaults();
+    }
+}

src/PulseDock.App/Services/Interfaces/IStartupService.cs

@@ -0,0 +1,8 @@
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface IStartupService
+    {
+        bool IsAutostartEnabled();
+        bool SetAutostart(bool enable);
+    }
+}

src/PulseDock.App/Services/Interfaces/IThemeService.cs

@@ -0,0 +1,11 @@
+using System.Windows;
+using AppThemeMode = PulseDock.App.Models.ThemeMode;
+
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface IThemeService
+    {
+        void ApplyTheme(AppThemeMode themeMode, string accentColorHex, double opacity);
+        bool IsWindowsInDarkMode();
+    }
+}

src/PulseDock.App/Services/Interfaces/ITrayIconService.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface ITrayIconService : IDisposable
+    {
+        void Initialize();
+        void ShowTrayIcon(bool visible);
+    }
+}

src/PulseDock.App/Services/Interfaces/IWidgetPositionService.cs

@@ -0,0 +1,11 @@
+using System.Windows;
+using Point = System.Windows.Point;
+
+namespace PulseDock.App.Services.Interfaces
+{
+    public interface IWidgetPositionService
+    {
+        Point EnsureVisiblePosition(double currentX, double currentY, double width, double height);
+        void SavePosition(double x, double y);
+    }
+}

src/PulseDock.App/Themes/Styles.xaml

@@ -0,0 +1,81 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!-- Theme Brushes (Overridden dynamically at runtime by ThemeService) -->
+    <SolidColorBrush x:Key="GlassBackgroundBrush" Color="#D00F1218"/>
+    <SolidColorBrush x:Key="AccentBrush" Color="#8A2BE2"/>
+    <SolidColorBrush x:Key="TextPrimaryBrush" Color="#FFFFFF"/>
+    <SolidColorBrush x:Key="TextSecondaryBrush" Color="#AAB4C3"/>
+    <SolidColorBrush x:Key="BorderBrush" Color="#3CFFFFFF"/>
+    <SolidColorBrush x:Key="WarningBrush" Color="#FF8C00"/>
+    <SolidColorBrush x:Key="CriticalBrush" Color="#EB3232"/>
+    <SolidColorBrush x:Key="NormalBrush" Color="#2ECC71"/>
+
+    <!-- Glass Container Style -->
+    <Style x:Key="GlassContainerStyle" TargetType="Border">
+        <Setter Property="Background" Value="{DynamicResource GlassBackgroundBrush}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="CornerRadius" Value="14"/>
+        <Setter Property="Effect">
+            <Setter.Value>
+                <DropShadowEffect BlurRadius="20" ShadowDepth="4" Direction="270" Color="#000000" Opacity="0.5"/>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <!-- Header Drag Handle Bar -->
+    <Style x:Key="DragHandleStyle" TargetType="Border">
+        <Setter Property="Background" Value="#1AFFFFFF"/>
+        <Setter Property="Height" Value="6"/>
+        <Setter Property="Width" Value="36"/>
+        <Setter Property="CornerRadius" Value="3"/>
+        <Setter Property="HorizontalAlignment" Value="Center"/>
+        <Setter Property="Margin" Value="0,6,0,6"/>
+        <Setter Property="Cursor" Value="SizeAll"/>
+    </Style>
+
+    <!-- Modern TextStyles -->
+    <Style x:Key="HeaderTextStyle" TargetType="TextBlock">
+        <Setter Property="Foreground" Value="{DynamicResource TextPrimaryBrush}"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="FontSize" Value="13"/>
+        <Setter Property="FontFamily" Value="Segoe UI, Inter, Roboto"/>
+    </Style>
+
+    <Style x:Key="SubTextStyle" TargetType="TextBlock">
+        <Setter Property="Foreground" Value="{DynamicResource TextSecondaryBrush}"/>
+        <Setter Property="FontSize" Value="11"/>
+        <Setter Property="FontFamily" Value="Segoe UI, Inter, Roboto"/>
+    </Style>
+
+    <Style x:Key="ValueTextStyle" TargetType="TextBlock">
+        <Setter Property="Foreground" Value="{DynamicResource AccentBrush}"/>
+        <Setter Property="FontWeight" Value="Bold"/>
+        <Setter Property="FontSize" Value="13"/>
+        <Setter Property="FontFamily" Value="Segoe UI, Inter, Roboto"/>
+    </Style>
+
+    <!-- Fluent Button Style -->
+    <Style x:Key="FluentButtonStyle" TargetType="Button">
+        <Setter Property="Background" Value="#25FFFFFF"/>
+        <Setter Property="Foreground" Value="{DynamicResource TextPrimaryBrush}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="Padding" Value="10,5"/>
+        <Setter Property="FontFamily" Value="Segoe UI"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="Button">
+                    <Border Background="{TemplateBinding Background}"
+                            BorderBrush="{TemplateBinding BorderBrush}"
+                            BorderThickness="{TemplateBinding BorderThickness}"
+                            CornerRadius="6" Padding="{TemplateBinding Padding}">
+                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                    </Border>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+</ResourceDictionary>

src/PulseDock.App/Utilities/CircularBuffer.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace PulseDock.App.Utilities
+{
+    /// <summary>
+    /// Thread-safe fixed-capacity ring buffer for performance metrics history.
+    /// </summary>
+    /// <typeparam name="T">Data type stored in the buffer.</typeparam>
+    public class CircularBuffer<T> : IEnumerable<T>
+    {
+        private readonly T[] _buffer;
+        private readonly object _lock = new();
+        private int _start;
+        private int _end;
+
+        /// <summary>
+        /// Gets the maximum number of elements the buffer can hold.
+        /// </summary>
+        public int Capacity { get; }
+
+        /// <summary>
+        /// Gets the current number of elements stored in the buffer.
+        /// </summary>
+        public int Count { get; private set; }
+
+        public CircularBuffer(int capacity)
+        {
+            if (capacity <= 0)
+                throw new ArgumentException("Capacity must be greater than zero.", nameof(capacity));
+
+            Capacity = capacity;
+            _buffer = new T[capacity];
+            _start = 0;
+            _end = 0;
+            Count = 0;
+        }
+
+        /// <summary>
+        /// Adds an item to the buffer, overwriting the oldest item if capacity is reached.
+        /// </summary>
+        public void Add(T item)
+        {
+            lock (_lock)
+            {
+                _buffer[_end] = item;
+                _end = (_end + 1) % Capacity;
+
+                if (Count < Capacity)
+                {
+                    Count++;
+                }
+                else
+                {
+                    _start = (_start + 1) % Capacity;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Clears all items in the buffer.
+        /// </summary>
+        public void Clear()
+        {
+            lock (_lock)
+            {
+                Array.Clear(_buffer, 0, _buffer.Length);
+                _start = 0;
+                _end = 0;
+                Count = 0;
+            }
+        }
+
+        /// <summary>
+        /// Returns an array snapshot of current items in chronological order.
+        /// </summary>
+        public T[] ToArray()
+        {
+            lock (_lock)
+            {
+                var result = new T[Count];
+                for (int i = 0; i < Count; i++)
+                {
+                    result[i] = _buffer[(_start + i) % Capacity];
+                }
+                return result;
+            }
+        }
+
+        public IEnumerator<T> GetEnumerator()
+        {
+            return ((IEnumerable<T>)ToArray()).GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+    }
+}

src/PulseDock.App/Utilities/HotkeyManager.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Windows.Interop;
+
+namespace PulseDock.App.Utilities
+{
+    public class HotkeyManager : IDisposable
+    {
+        private const int HOTKEY_ID = 9001;
+        private HwndSource? _source;
+        private readonly Action _onTriggered;
+        private bool _isRegistered;
+
+        public HotkeyManager(Action onTriggered)
+        {
+            _onTriggered = onTriggered ?? throw new ArgumentNullException(nameof(onTriggered));
+        }
+
+        public bool Register(IntPtr windowHandle)
+        {
+            if (_isRegistered || windowHandle == IntPtr.Zero) return false;
+
+            _source = HwndSource.FromHwnd(windowHandle);
+            _source?.AddHook(HwndHook);
+
+            // Register Ctrl + Shift + F12
+            _isRegistered = Win32Api.RegisterHotKey(windowHandle, HOTKEY_ID, Win32Api.MOD_CONTROL | Win32Api.MOD_SHIFT, Win32Api.VK_F12);
+            return _isRegistered;
+        }
+
+        public void Unregister(IntPtr windowHandle)
+        {
+            if (!_isRegistered || windowHandle == IntPtr.Zero) return;
+
+            Win32Api.UnregisterHotKey(windowHandle, HOTKEY_ID);
+            _source?.RemoveHook(HwndHook);
+            _isRegistered = false;
+        }
+
+        private IntPtr HwndHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
+        {
+            if (msg == Win32Api.WM_HOTKEY && wParam.ToInt32() == HOTKEY_ID)
+            {
+                _onTriggered.Invoke();
+                handled = true;
+            }
+            return IntPtr.Zero;
+        }
+
+        public void Dispose()
+        {
+            if (_source != null && _isRegistered)
+            {
+                Unregister(_source.Handle);
+            }
+        }
+    }
+}

src/PulseDock.App/Utilities/RelayCommand.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Windows.Input;
+
+namespace PulseDock.App.Utilities
+{
+    public class RelayCommand : ICommand
+    {
+        private readonly Action<object?> _execute;
+        private readonly Predicate<object?>? _canExecute;
+
+        public RelayCommand(Action<object?> execute, Predicate<object?>? canExecute = null)
+        {
+            _execute = execute ?? throw new ArgumentNullException(nameof(execute));
+            _canExecute = canExecute;
+        }
+
+        public RelayCommand(Action execute, Func<bool>? canExecute = null)
+            : this(_ => execute(), canExecute == null ? null : _ => canExecute())
+        {
+        }
+
+        public bool CanExecute(object? parameter)
+        {
+            return _canExecute == null || _canExecute(parameter);
+        }
+
+        public void Execute(object? parameter)
+        {
+            _execute(parameter);
+        }
+
+        public void RaiseCanExecuteChanged()
+        {
+            CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+        }
+
+        public event EventHandler? CanExecuteChanged;
+    }
+}

src/PulseDock.App/Utilities/Win32Api.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace PulseDock.App.Utilities
+{
+    public static class Win32Api
+    {
+        public const int WS_EX_TOOLWINDOW = 0x00000080;
+        public const int WS_EX_TRANSPARENT = 0x00000020;
+        public const int WS_EX_NOACTIVATE = 0x08000000;
+        public const int GWL_EXSTYLE = -20;
+        public const int WM_HOTKEY = 0x0312;
+
+        public const uint MOD_ALT = 0x0001;
+        public const uint MOD_CONTROL = 0x0002;
+        public const uint MOD_SHIFT = 0x0004;
+        public const uint MOD_WIN = 0x0008;
+
+        public const uint VK_F12 = 0x7B;
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern int GetWindowLong(IntPtr hWnd, int nIndex);
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern bool UnregisterHotKey(IntPtr hWnd, int id);
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct POINT
+        {
+            public int X;
+            public int Y;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct RECT
+        {
+            public int Left;
+            public int Top;
+            public int Right;
+            public int Bottom;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct MONITORINFO
+        {
+            public int cbSize;
+            public RECT rcMonitor;
+            public RECT rcWork;
+            public uint dwFlags;
+        }
+
+        public const uint MONITOR_DEFAULTTONEAREST = 0x00000002;
+
+        [DllImport("user32.dll")]
+        public static extern IntPtr MonitorFromWindow(IntPtr handle, uint flags);
+
+        [DllImport("user32.dll")]
+        public static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct SYSTEM_POWER_STATUS
+        {
+            public byte ACLineStatus;
+            public byte BatteryFlag;
+            public byte BatteryLifePercent;
+            public byte SystemBatteryState;
+            public uint BatteryLifeTime;
+            public uint BatteryFullLifeTime;
+        }
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        public static extern bool GetSystemPowerStatus(out SYSTEM_POWER_STATUS sps);
+    }
+}

src/PulseDock.App/ViewModels/AboutViewModel.cs

@@ -0,0 +1,11 @@
+namespace PulseDock.App.ViewModels
+{
+    public class AboutViewModel : ViewModelBase
+    {
+        public string AppName => "PulseDock";
+        public string Version => "1.0.0 (.NET 10 x64)";
+        public string Description => "Modernes, minimalistisches Windows-Systemmonitor-Widget.";
+        public string Libraries => "LibreHardwareMonitorLib, Microsoft.Extensions.DependencyInjection, System.Management";
+        public string LicenseInfo => "MIT License - Open Source System Monitor Widget.";
+    }
+}

src/PulseDock.App/ViewModels/MainWidgetViewModel.cs

@@ -0,0 +1,246 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Input;
+using PulseDock.App.Configuration;
+using PulseDock.App.Models;
+using PulseDock.App.Services.Interfaces;
+using PulseDock.App.Utilities;
+using Application = System.Windows.Application;
+
+namespace PulseDock.App.ViewModels
+{
+    public class MainWidgetViewModel : ViewModelBase, IDisposable
+    {
+        private readonly IHardwareMonitoringService _hardwareService;
+        private readonly ISettingsService _settingsService;
+        private readonly IThemeService _themeService;
+        private readonly INotificationService _notificationService;
+        private readonly ILoggerService _logger;
+
+        private CancellationTokenSource? _cts;
+        private Task? _monitoringTask;
+
+        private CpuMetrics _cpu = new();
+        private MemoryMetrics _memory = new();
+        private GpuMetrics _gpu = new();
+        private BatteryMetrics _battery = new();
+        private NetworkMetrics _network = new();
+        private ObservableCollection<DiskMetrics> _disks = new();
+        private ObservableCollection<ProcessMetrics> _topProcesses = new();
+
+        // History buffers for sparkline charts
+        private readonly CircularBuffer<float> _cpuHistory = new(60);
+        private readonly CircularBuffer<float> _ramHistory = new(60);
+        private readonly CircularBuffer<float> _gpuHistory = new(60);
+        private readonly CircularBuffer<float> _netDownHistory = new(60);
+        private readonly CircularBuffer<float> _netUpHistory = new(60);
+
+        private float[] _cpuHistoryArray = Array.Empty<float>();
+        private float[] _ramHistoryArray = Array.Empty<float>();
+        private float[] _gpuHistoryArray = Array.Empty<float>();
+        private float[] _netDownHistoryArray = Array.Empty<float>();
+        private float[] _netUpHistoryArray = Array.Empty<float>();
+
+        public AppSettings Settings => _settingsService.Current;
+
+        public CpuMetrics Cpu { get => _cpu; private set => SetProperty(ref _cpu, value); }
+        public MemoryMetrics Memory { get => _memory; private set => SetProperty(ref _memory, value); }
+        public GpuMetrics Gpu { get => _gpu; private set => SetProperty(ref _gpu, value); }
+        public BatteryMetrics Battery { get => _battery; private set => SetProperty(ref _battery, value); }
+        public NetworkMetrics Network { get => _network; private set => SetProperty(ref _network, value); }
+        public ObservableCollection<DiskMetrics> Disks { get => _disks; private set => SetProperty(ref _disks, value); }
+        public ObservableCollection<ProcessMetrics> TopProcesses { get => _topProcesses; private set => SetProperty(ref _topProcesses, value); }
+
+        public float[] CpuHistory { get => _cpuHistoryArray; private set => SetProperty(ref _cpuHistoryArray, value); }
+        public float[] RamHistory { get => _ramHistoryArray; private set => SetProperty(ref _ramHistoryArray, value); }
+        public float[] GpuHistory { get => _gpuHistoryArray; private set => SetProperty(ref _gpuHistoryArray, value); }
+        public float[] NetDownHistory { get => _netDownHistoryArray; private set => SetProperty(ref _netDownHistoryArray, value); }
+        public float[] NetUpHistory { get => _netUpHistoryArray; private set => SetProperty(ref _netUpHistoryArray, value); }
+
+        public WidgetMode Mode
+        {
+            get => Settings.Mode;
+            set
+            {
+                if (Settings.Mode != value)
+                {
+                    Settings.Mode = value;
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public bool IsPositionLocked => Settings.PositionLocked;
+        public bool AlwaysOnTop => Settings.AlwaysOnTop;
+        public bool IsClickThrough => Settings.EnableClickThrough;
+
+        public ICommand SwitchModeCommand { get; }
+        public ICommand ToggleLockPositionCommand { get; }
+        public ICommand ToggleAlwaysOnTopCommand { get; }
+        public ICommand CycleModeCommand { get; }
+
+        public MainWidgetViewModel(
+            IHardwareMonitoringService hardwareService,
+            ISettingsService settingsService,
+            IThemeService themeService,
+            INotificationService notificationService,
+            ILoggerService logger)
+        {
+            _hardwareService = hardwareService;
+            _settingsService = settingsService;
+            _themeService = themeService;
+            _notificationService = notificationService;
+            _logger = logger;
+
+            SwitchModeCommand = new RelayCommand(param =>
+            {
+                if (param is WidgetMode mode) Mode = mode;
+                else if (param is string str && Enum.TryParse<WidgetMode>(str, true, out var m)) Mode = m;
+            });
+
+            ToggleLockPositionCommand = new RelayCommand(() =>
+            {
+                Settings.PositionLocked = !Settings.PositionLocked;
+                _settingsService.SaveSettings();
+                OnPropertyChanged(nameof(IsPositionLocked));
+            });
+
+            ToggleAlwaysOnTopCommand = new RelayCommand(() =>
+            {
+                Settings.AlwaysOnTop = !Settings.AlwaysOnTop;
+                _settingsService.SaveSettings();
+                OnPropertyChanged(nameof(AlwaysOnTop));
+            });
+
+            CycleModeCommand = new RelayCommand(() =>
+            {
+                Mode = Mode switch
+                {
+                    WidgetMode.Compact => WidgetMode.Standard,
+                    WidgetMode.Standard => WidgetMode.Expanded,
+                    WidgetMode.Expanded => WidgetMode.Compact,
+                    _ => WidgetMode.Standard
+                };
+            });
+
+            _settingsService.SettingsChanged += (s, e) =>
+            {
+                OnPropertyChanged(nameof(Settings));
+                OnPropertyChanged(nameof(Mode));
+                OnPropertyChanged(nameof(IsPositionLocked));
+                OnPropertyChanged(nameof(AlwaysOnTop));
+                OnPropertyChanged(nameof(IsClickThrough));
+            };
+
+            // Sample initial metrics immediately
+            FetchMetricsSnapshot();
+
+            StartMonitoring();
+        }
+
+        public void StartMonitoring()
+        {
+            _cts = new CancellationTokenSource();
+            _monitoringTask = Task.Run(() => MonitoringLoopAsync(_cts.Token));
+        }
+
+        private void FetchMetricsSnapshot()
+        {
+            try
+            {
+                _hardwareService.RefreshSensors();
+
+                var newCpu = _hardwareService.GetCpuMetrics();
+                var newRam = _hardwareService.GetMemoryMetrics();
+                var newGpu = _hardwareService.GetGpuMetrics();
+                var newBattery = _hardwareService.GetBatteryMetrics();
+                var newDisks = _hardwareService.GetDiskMetrics();
+                var newNetwork = _hardwareService.GetNetworkMetrics();
+                var newProcesses = Settings.EnableProcessMonitoring ? _hardwareService.GetTopProcesses(3) : new List<ProcessMetrics>();
+
+                // Push to history
+                _cpuHistory.Add(newCpu.OverallLoadPercent);
+                _ramHistory.Add(newRam.LoadPercent);
+                _gpuHistory.Add(newGpu.LoadPercent);
+                _netDownHistory.Add((float)(newNetwork.DownloadBytesPerSec / 1024.0)); // in KB/s
+                _netUpHistory.Add((float)(newNetwork.UploadBytesPerSec / 1024.0)); // in KB/s
+
+                // Check warnings
+                CheckAlerts(newCpu, newRam, newGpu, newBattery);
+
+                Cpu = newCpu;
+                Memory = newRam;
+                Gpu = newGpu;
+                Battery = newBattery;
+                Network = newNetwork;
+
+                Disks = new ObservableCollection<DiskMetrics>(newDisks);
+                TopProcesses = new ObservableCollection<ProcessMetrics>(newProcesses);
+
+                CpuHistory = _cpuHistory.ToArray();
+                RamHistory = _ramHistory.ToArray();
+                GpuHistory = _gpuHistory.ToArray();
+                NetDownHistory = _netDownHistory.ToArray();
+                NetUpHistory = _netUpHistory.ToArray();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Error fetching metrics snapshot", ex);
+            }
+        }
+
+        private async Task MonitoringLoopAsync(CancellationToken token)
+        {
+            _logger.LogInfo("Telemetry monitoring loop started.");
+            while (!token.IsCancellationRequested)
+            {
+                Application.Current?.Dispatcher.InvokeAsync(() => FetchMetricsSnapshot());
+
+                int interval = Settings.UpdateIntervalMs;
+                if (Battery.HasBattery && !Battery.IsPluggedIn && Settings.PowerSaverOnBattery)
+                {
+                    interval = Settings.UpdateIntervalBatteryMs;
+                }
+
+                await Task.Delay(Math.Max(500, interval), token).ConfigureAwait(false);
+            }
+        }
+
+        private void CheckAlerts(CpuMetrics cpu, MemoryMetrics ram, GpuMetrics gpu, BatteryMetrics battery)
+        {
+            if (!Settings.EnableWindowsNotifications) return;
+
+            if (Settings.EnableCpuWarning && cpu.Status == AlertStatus.Critical)
+            {
+                _notificationService.SendNotification("CPU Warnung", $"Kritische CPU-Auslastung: {cpu.OverallLoadPercent:F0}%", isCritical: true);
+            }
+
+            if (Settings.EnableMemoryWarning && ram.Status == AlertStatus.Critical)
+            {
+                _notificationService.SendNotification("RAM Warnung", $"Kritische Speicherauslastung: {ram.LoadPercent:F0}%", isCritical: true);
+            }
+
+            if (Settings.EnableTempWarning && cpu.TemperatureC.HasValue && cpu.TemperatureC.Value >= Settings.Thresholds.CpuTempCriticalC)
+            {
+                _notificationService.SendNotification("Temperatur Warnung", $"Kritische CPU-Temperatur: {cpu.TemperatureC.Value:F0} °C", isCritical: true);
+            }
+
+            if (Settings.EnableBatteryWarning && battery.HasBattery && !battery.IsPluggedIn && battery.Status == AlertStatus.Critical)
+            {
+                _notificationService.SendNotification("Akku Kritisch", $"Niedriger Akkustand: {battery.Percentage:F0}%", isCritical: true);
+            }
+        }
+
+        public void Dispose()
+        {
+            _cts?.Cancel();
+            _cts?.Dispose();
+        }
+    }
+}

src/PulseDock.App/ViewModels/SettingsViewModel.cs

@@ -0,0 +1,172 @@
+using System;
+using System.Diagnostics;
+using System.Windows.Input;
+using PulseDock.App.Configuration;
+using PulseDock.App.Models;
+using PulseDock.App.Services.Interfaces;
+using PulseDock.App.Utilities;
+
+namespace PulseDock.App.ViewModels
+{
+    public class SettingsViewModel : ViewModelBase
+    {
+        private readonly ISettingsService _settingsService;
+        private readonly IStartupService _startupService;
+        private readonly IThemeService _themeService;
+        private readonly ILoggerService _logger;
+
+        public AppSettings Settings => _settingsService.Current;
+
+        public bool StartWithWindows
+        {
+            get => Settings.StartWithWindows;
+            set
+            {
+                if (Settings.StartWithWindows != value)
+                {
+                    Settings.StartWithWindows = value;
+                    _startupService.SetAutostart(value);
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public WidgetMode Mode
+        {
+            get => Settings.Mode;
+            set
+            {
+                if (Settings.Mode != value)
+                {
+                    Settings.Mode = value;
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public ThemeMode Theme
+        {
+            get => Settings.Theme;
+            set
+            {
+                if (Settings.Theme != value)
+                {
+                    Settings.Theme = value;
+                    _themeService.ApplyTheme(value, Settings.AccentColorHex, Settings.BackgroundOpacity);
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public double BackgroundOpacity
+        {
+            get => Settings.BackgroundOpacity;
+            set
+            {
+                if (Math.Abs(Settings.BackgroundOpacity - value) > 0.01)
+                {
+                    Settings.BackgroundOpacity = value;
+                    _themeService.ApplyTheme(Settings.Theme, Settings.AccentColorHex, value);
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public bool AlwaysOnTop
+        {
+            get => Settings.AlwaysOnTop;
+            set
+            {
+                if (Settings.AlwaysOnTop != value)
+                {
+                    Settings.AlwaysOnTop = value;
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public bool PositionLocked
+        {
+            get => Settings.PositionLocked;
+            set
+            {
+                if (Settings.PositionLocked != value)
+                {
+                    Settings.PositionLocked = value;
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public bool EnableClickThrough
+        {
+            get => Settings.EnableClickThrough;
+            set
+            {
+                if (Settings.EnableClickThrough != value)
+                {
+                    Settings.EnableClickThrough = value;
+                    _settingsService.SaveSettings();
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public ICommand SaveCommand { get; }
+        public ICommand ResetDefaultsCommand { get; }
+        public ICommand RestartAsAdminCommand { get; }
+
+        public SettingsViewModel(
+            ISettingsService settingsService,
+            IStartupService startupService,
+            IThemeService themeService,
+            ILoggerService logger)
+        {
+            _settingsService = settingsService;
+            _startupService = startupService;
+            _themeService = themeService;
+            _logger = logger;
+
+            SaveCommand = new RelayCommand(() =>
+            {
+                _settingsService.SaveSettings();
+            });
+
+            ResetDefaultsCommand = new RelayCommand(() =>
+            {
+                _settingsService.ResetToDefaults();
+                _themeService.ApplyTheme(Settings.Theme, Settings.AccentColorHex, Settings.BackgroundOpacity);
+                OnPropertyChanged(string.Empty);
+            });
+
+            RestartAsAdminCommand = new RelayCommand(() =>
+            {
+                try
+                {
+                    var exePath = Environment.ProcessPath;
+                    if (!string.IsNullOrEmpty(exePath))
+                    {
+                        var psi = new ProcessStartInfo
+                        {
+                            FileName = exePath,
+                            UseShellExecute = true,
+                            Verb = "runas"
+                        };
+                        Process.Start(psi);
+                        System.Windows.Application.Current.Shutdown();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError("Failed to restart application as Administrator.", ex);
+                }
+            });
+        }
+    }
+}

src/PulseDock.App/ViewModels/ViewModelBase.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace PulseDock.App.ViewModels
+{
+    public abstract class ViewModelBase : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
+        {
+            if (Equals(field, value)) return false;
+            field = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+    }
+}

src/PulseDock.App/Views/AboutWindow.xaml

@@ -0,0 +1,24 @@
+<Window x:Class="PulseDock.App.Views.AboutWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Über PulseDock" Height="300" Width="400"
+        WindowStartupLocation="CenterOwner" ResizeMode="NoResize"
+        Background="#14171E" Foreground="White">
+
+    <Grid Margin="20">
+        <StackPanel>
+            <TextBlock Text="{Binding AppName}" FontSize="22" FontWeight="Bold" Foreground="#8A2BE2"/>
+            <TextBlock Text="{Binding Version}" FontSize="12" Foreground="#AAB4C3" Margin="0,2,0,12"/>
+            <TextBlock Text="{Binding Description}" FontSize="13" TextWrapping="Wrap" Margin="0,0,0,16"/>
+
+            <TextBlock Text="Verwendete Bibliotheken:" FontWeight="SemiBold" Margin="0,4,0,2"/>
+            <TextBlock Text="{Binding Libraries}" Foreground="#AAB4C3" FontSize="11" TextWrapping="Wrap"/>
+
+            <TextBlock Text="Lizenz:" FontWeight="SemiBold" Margin="0,12,0,2"/>
+            <TextBlock Text="{Binding LicenseInfo}" Foreground="#AAB4C3" FontSize="11"/>
+
+            <Button Content="Schließen" Click="Close_Click" HorizontalAlignment="Right" Margin="0,20,0,0"
+                    Background="#8A2BE2" Foreground="White" Padding="16,6" BorderThickness="0"/>
+        </StackPanel>
+    </Grid>
+</Window>

src/PulseDock.App/Views/AboutWindow.xaml.cs

@@ -0,0 +1,19 @@
+using System.Windows;
+using PulseDock.App.ViewModels;
+
+namespace PulseDock.App.Views
+{
+    public partial class AboutWindow : Window
+    {
+        public AboutWindow(AboutViewModel viewModel)
+        {
+            InitializeComponent();
+            DataContext = viewModel;
+        }
+
+        private void Close_Click(object sender, RoutedEventArgs e)
+        {
+            Close();
+        }
+    }
+}

src/PulseDock.App/Views/MainWindow.xaml

@@ -0,0 +1,244 @@
+<Window x:Class="PulseDock.App.Views.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:controls="clr-namespace:PulseDock.App.Controls"
+        xmlns:converters="clr-namespace:PulseDock.App.Converters"
+        xmlns:models="clr-namespace:PulseDock.App.Models"
+        Title="PulseDock" Height="Auto" Width="320"
+        WindowStyle="None" AllowsTransparency="True" Background="Transparent"
+        ResizeMode="NoResize"
+        Topmost="{Binding AlwaysOnTop}"
+        ShowInTaskbar="{Binding Settings.ShowInTaskbar}"
+        SizeToContent="Height"
+        KeyDown="Window_KeyDown"
+        MouseWheel="Window_MouseWheel"
+        Loaded="Window_Loaded"
+        Closing="Window_Closing">
+
+    <WindowChrome.WindowChrome>
+        <WindowChrome GlassFrameThickness="0" CornerRadius="0" CaptionHeight="0" UseAeroCaptionButtons="False"/>
+    </WindowChrome.WindowChrome>
+
+    <Window.Resources>
+        <converters:BytesToHumanReadableConverter x:Key="BytesConverter"/>
+        <converters:SpeedFormatterConverter x:Key="SpeedConverter"/>
+        <converters:ValueToColorConverter x:Key="ColorConverter"/>
+        <converters:BooleanToVisibilityConverter x:Key="BoolToVis"/>
+        <converters:InverseBooleanConverter x:Key="InverseBool"/>
+        <converters:WidgetModeToVisibilityConverter x:Key="ModeToVis"/>
+    </Window.Resources>
+
+    <Window.ContextMenu>
+        <ContextMenu>
+            <MenuItem Header="Kompaktmodus" Command="{Binding SwitchModeCommand}" CommandParameter="Compact"/>
+            <MenuItem Header="Standardmodus" Command="{Binding SwitchModeCommand}" CommandParameter="Standard"/>
+            <MenuItem Header="Erweiterter Modus" Command="{Binding SwitchModeCommand}" CommandParameter="Expanded"/>
+            <Separator/>
+            <MenuItem Header="Position sperren" IsCheckable="True" IsChecked="{Binding IsPositionLocked}" Command="{Binding ToggleLockPositionCommand}"/>
+            <MenuItem Header="Immer im Vordergrund" IsCheckable="True" IsChecked="{Binding AlwaysOnTop}" Command="{Binding ToggleAlwaysOnTopCommand}"/>
+            <Separator/>
+            <MenuItem Header="Einstellungen..." Click="OpenSettings_Click"/>
+            <MenuItem Header="Über PulseDock..." Click="OpenAbout_Click"/>
+            <Separator/>
+            <MenuItem Header="Beenden" Click="Exit_Click"/>
+        </ContextMenu>
+    </Window.ContextMenu>
+
+    <Border Style="{StaticResource GlassContainerStyle}" Margin="10">
+        <Grid Margin="12,8,12,12">
+            <Grid.RowDefinitions>
+                <!-- Drag Handle -->
+                <RowDefinition Height="Auto"/>
+                <!-- Compact View -->
+                <RowDefinition Height="Auto"/>
+                <!-- Standard / Expanded Extension -->
+                <RowDefinition Height="Auto"/>
+                <!-- Expanded Extra Sensors -->
+                <RowDefinition Height="Auto"/>
+                <!-- Footer / Non-Admin Hint -->
+                <RowDefinition Height="Auto"/>
+            </Grid.RowDefinitions>
+
+            <!-- Drag Handle Bar -->
+            <Border Grid.Row="0" Style="{StaticResource DragHandleStyle}"
+                    MouseLeftButtonDown="DragHandle_MouseLeftButtonDown"
+                    ToolTip="Klicken &amp; Ziehen zum Verschieben (Doppelklick zum Umschalten des Modus)"/>
+
+            <!-- ROW 1: COMPACT VIEW (Always Visible) -->
+            <StackPanel Grid.Row="1" MouseLeftButtonDown="CompactArea_MouseDoubleClick">
+                <Grid Margin="0,4,0,8">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="Auto"/>
+                    </Grid.ColumnDefinitions>
+
+                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
+                        <TextBlock Text="PulseDock" Style="{StaticResource HeaderTextStyle}" FontSize="14" Margin="0,0,8,0"/>
+                        <Border Background="{DynamicResource AccentBrush}" CornerRadius="4" Padding="4,1" VerticalAlignment="Center">
+                            <TextBlock Text="{Binding Mode}" Foreground="White" FontSize="9" FontWeight="Bold"/>
+                        </Border>
+                    </StackPanel>
+
+                    <!-- Lock / Mode Toggle Buttons -->
+                    <StackPanel Grid.Column="1" Orientation="Horizontal">
+                        <Button Style="{StaticResource FluentButtonStyle}" Padding="6,2" Margin="0,0,4,0"
+                                Command="{Binding ToggleLockPositionCommand}" ToolTip="Position sperren/entsperren">
+                            <TextBlock Text="{Binding IsPositionLocked, Converter={StaticResource BoolToVis}, ConverterParameter='Inverse'}" FontSize="10"/>
+                        </Button>
+                        <Button Style="{StaticResource FluentButtonStyle}" Padding="6,2" Command="{Binding CycleModeCommand}" ToolTip="Modus umschalten">
+                            <TextBlock Text="⚙" FontSize="10"/>
+                        </Button>
+                    </StackPanel>
+                </Grid>
+
+                <!-- CPU & RAM Rings Summary -->
+                <Grid Margin="0,4">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="*"/>
+                    </Grid.ColumnDefinitions>
+
+                    <!-- CPU Ring -->
+                    <Border Background="#15FFFFFF" CornerRadius="8" Padding="8" Margin="0,0,4,0">
+                        <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
+                            <controls:ProgressRingControl Value="{Binding Cpu.OverallLoadPercent}"
+                                                         ProgressBrush="{Binding Cpu.Status, Converter={StaticResource ColorConverter}}"
+                                                         Width="32" Height="32" StrokeThickness="3.5" Margin="0,0,8,0"/>
+                            <StackPanel VerticalAlignment="Center">
+                                <TextBlock Text="CPU" Style="{StaticResource SubTextStyle}"/>
+                                <TextBlock Text="{Binding Cpu.OverallLoadPercent, StringFormat='{}{0:F0}%'}" Style="{StaticResource ValueTextStyle}"/>
+                            </StackPanel>
+                        </StackPanel>
+                    </Border>
+
+                    <!-- RAM Ring -->
+                    <Border Grid.Column="1" Background="#15FFFFFF" CornerRadius="8" Padding="8" Margin="4,0,0,0">
+                        <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
+                            <controls:ProgressRingControl Value="{Binding Memory.LoadPercent}"
+                                                         ProgressBrush="{Binding Memory.Status, Converter={StaticResource ColorConverter}}"
+                                                         Width="32" Height="32" StrokeThickness="3.5" Margin="0,0,8,0"/>
+                            <StackPanel VerticalAlignment="Center">
+                                <TextBlock Text="RAM" Style="{StaticResource SubTextStyle}"/>
+                                <TextBlock Text="{Binding Memory.LoadPercent, StringFormat='{}{0:F0}%'}" Style="{StaticResource ValueTextStyle}"/>
+                            </StackPanel>
+                        </StackPanel>
+                    </Border>
+                </Grid>
+
+                <!-- Temp & Battery Info -->
+                <Grid Margin="0,4">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="Auto"/>
+                    </Grid.ColumnDefinitions>
+
+                    <StackPanel Orientation="Horizontal">
+                        <TextBlock Text="Temp: " Style="{StaticResource SubTextStyle}"/>
+                        <TextBlock Text="{Binding Cpu.TemperatureC, StringFormat='{}{0:F0} °C', TargetNullValue='N/A'}" Style="{StaticResource SubTextStyle}" FontWeight="SemiBold" Foreground="{DynamicResource TextPrimaryBrush}"/>
+                    </StackPanel>
+
+                    <StackPanel Grid.Column="1" Orientation="Horizontal" Visibility="{Binding Battery.HasBattery, Converter={StaticResource BoolToVis}}">
+                        <TextBlock Text="Akku: " Style="{StaticResource SubTextStyle}"/>
+                        <TextBlock Text="{Binding Battery.Percentage, StringFormat='{}{0:F0}%'}" Style="{StaticResource ValueTextStyle}"/>
+                    </StackPanel>
+                </Grid>
+            </StackPanel>
+
+            <!-- ROW 2: STANDARD / EXPANDED EXTENSION -->
+            <StackPanel Grid.Row="2" Visibility="{Binding Mode, Converter={StaticResource ModeToVis}, ConverterParameter='StandardOrExpanded'}" Margin="0,8,0,0">
+                <Separator Background="{DynamicResource BorderBrush}" Margin="0,0,0,8"/>
+
+                <!-- CPU Sparkline -->
+                <TextBlock Text="CPU Verlauf" Style="{StaticResource SubTextStyle}" Margin="0,0,0,2"/>
+                <controls:SparklineControl Values="{Binding CpuHistory}" LineColor="{DynamicResource AccentBrush}" Height="28" Margin="0,0,0,6"/>
+
+                <!-- RAM Usage Text & Sparkline -->
+                <TextBlock Text="{Binding Memory.FormattedText}" Style="{StaticResource SubTextStyle}" Margin="0,0,0,2"/>
+                <controls:SparklineControl Values="{Binding RamHistory}" LineColor="{DynamicResource NormalBrush}" Height="28" Margin="0,0,0,6"/>
+
+                <!-- GPU Status -->
+                <Border Background="#12FFFFFF" CornerRadius="6" Padding="6" Margin="0,2,0,6" Visibility="{Binding Gpu.IsAvailable, Converter={StaticResource BoolToVis}}">
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="*"/>
+                            <ColumnDefinition Width="Auto"/>
+                        </Grid.ColumnDefinitions>
+                        <StackPanel>
+                            <TextBlock Text="{Binding Gpu.Name}" Style="{StaticResource HeaderTextStyle}" FontSize="11"/>
+                            <TextBlock Text="{Binding Gpu.LoadPercent, StringFormat='{}Auslastung: {0:F0}%'}" Style="{StaticResource SubTextStyle}"/>
+                        </StackPanel>
+                        <TextBlock Grid.Column="1" Text="{Binding Gpu.TemperatureC, StringFormat='{}{0:F0} °C', TargetNullValue='N/A'}"
+                                   Style="{StaticResource ValueTextStyle}" VerticalAlignment="Center"/>
+                    </Grid>
+                </Border>
+
+                <!-- Network Download / Upload speeds -->
+                <Grid Margin="0,4">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="*"/>
+                    </Grid.ColumnDefinitions>
+                    <StackPanel Margin="0,0,4,0">
+                        <TextBlock Text="↓ Download" Style="{StaticResource SubTextStyle}"/>
+                        <TextBlock Text="{Binding Network.DownloadBytesPerSec, Converter={StaticResource SpeedConverter}}" Style="{StaticResource ValueTextStyle}" FontSize="12"/>
+                    </StackPanel>
+                    <StackPanel Grid.Column="1" Margin="4,0,0,0">
+                        <TextBlock Text="↑ Upload" Style="{StaticResource SubTextStyle}"/>
+                        <TextBlock Text="{Binding Network.UploadBytesPerSec, Converter={StaticResource SpeedConverter}}" Style="{StaticResource ValueTextStyle}" FontSize="12"/>
+                    </StackPanel>
+                </Grid>
+            </StackPanel>
+
+            <!-- ROW 3: EXPANDED VIEW EXTRA DETAILS -->
+            <StackPanel Grid.Row="3" Visibility="{Binding Mode, Converter={StaticResource ModeToVis}, ConverterParameter='Expanded'}" Margin="0,8,0,0">
+                <Separator Background="{DynamicResource BorderBrush}" Margin="0,0,0,8"/>
+
+                <!-- Disks list -->
+                <TextBlock Text="Laufwerke" Style="{StaticResource HeaderTextStyle}" FontSize="12" Margin="0,0,0,4"/>
+                <ItemsControl ItemsSource="{Binding Disks}">
+                    <ItemsControl.ItemTemplate>
+                        <DataTemplate>
+                            <Border Background="#10FFFFFF" CornerRadius="4" Padding="6" Margin="0,2">
+                                <Grid>
+                                    <Grid.ColumnDefinitions>
+                                        <ColumnDefinition Width="Auto"/>
+                                        <ColumnDefinition Width="*"/>
+                                        <ColumnDefinition Width="Auto"/>
+                                    </Grid.ColumnDefinitions>
+                                    <TextBlock Text="{Binding DriveLetter}" Style="{StaticResource HeaderTextStyle}" Margin="0,0,8,0"/>
+                                    <ProgressBar Grid.Column="1" Value="{Binding FreePercent}" Maximum="100" Height="6" VerticalAlignment="Center" Margin="0,0,8,0" Foreground="{DynamicResource AccentBrush}"/>
+                                    <TextBlock Grid.Column="2" Text="{Binding FreeBytes, Converter={StaticResource BytesConverter}, StringFormat='{}Frei: {0}'}" Style="{StaticResource SubTextStyle}"/>
+                                </Grid>
+                            </Border>
+                        </DataTemplate>
+                    </ItemsControl.ItemTemplate>
+                </ItemsControl>
+
+                <!-- Top Processes -->
+                <TextBlock Text="Top Prozesse (RAM)" Style="{StaticResource HeaderTextStyle}" FontSize="12" Margin="0,8,0,4"/>
+                <ItemsControl ItemsSource="{Binding TopProcesses}">
+                    <ItemsControl.ItemTemplate>
+                        <DataTemplate>
+                            <Grid Margin="0,2">
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="*"/>
+                                    <ColumnDefinition Width="Auto"/>
+                                </Grid.ColumnDefinitions>
+                                <TextBlock Text="{Binding Name}" Style="{StaticResource SubTextStyle}"/>
+                                <TextBlock Grid.Column="1" Text="{Binding FormattedMemory}" Style="{StaticResource SubTextStyle}" FontWeight="SemiBold"/>
+                            </Grid>
+                        </DataTemplate>
+                    </ItemsControl.ItemTemplate>
+                </ItemsControl>
+            </StackPanel>
+
+            <!-- ROW 4: FOOTER / CLICK-THROUGH NOTICE -->
+            <StackPanel Grid.Row="4" Margin="0,8,0,0">
+                <Border Background="#35EB3232" CornerRadius="6" Padding="6" Visibility="{Binding IsClickThrough, Converter={StaticResource BoolToVis}}">
+                    <TextBlock Text="Click-Through-Modus Aktiv (Strg+Umschalt+F12 zum Deaktivieren)" Foreground="White" FontSize="10" TextWrapping="Wrap" HorizontalAlignment="Center"/>
+                </Border>
+            </StackPanel>
+
+        </Grid>
+    </Border>
+</Window>

src/PulseDock.App/Views/MainWindow.xaml.cs

@@ -0,0 +1,148 @@
+using System;
+using System.Windows;
+using System.Windows.Input;
+using System.Windows.Interop;
+using PulseDock.App.Services.Interfaces;
+using PulseDock.App.Utilities;
+using PulseDock.App.ViewModels;
+using KeyEventArgs = System.Windows.Input.KeyEventArgs;
+using MouseButtonEventArgs = System.Windows.Input.MouseButtonEventArgs;
+using MouseWheelEventArgs = System.Windows.Input.MouseWheelEventArgs;
+
+namespace PulseDock.App.Views
+{
+    public partial class MainWindow : Window
+    {
+        private readonly MainWidgetViewModel _viewModel;
+        private readonly IWidgetPositionService _positionService;
+        private readonly IThemeService _themeService;
+        private readonly ISettingsService _settingsService;
+        private readonly HotkeyManager _hotkeyManager;
+
+        public MainWindow(
+            MainWidgetViewModel viewModel,
+            IWidgetPositionService positionService,
+            IThemeService themeService,
+            ISettingsService settingsService)
+        {
+            InitializeComponent();
+            _viewModel = viewModel;
+            _positionService = positionService;
+            _themeService = themeService;
+            _settingsService = settingsService;
+
+            DataContext = _viewModel;
+
+            _hotkeyManager = new HotkeyManager(ToggleClickThrough);
+        }
+
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            var handle = new WindowInteropHelper(this).Handle;
+            _hotkeyManager.Register(handle);
+
+            // Set initial position from settings
+            Left = _settingsService.Current.PositionX;
+            Top = _settingsService.Current.PositionY;
+
+            // Apply theme and position clamp
+            _themeService.ApplyTheme(_settingsService.Current.Theme, _settingsService.Current.AccentColorHex, _settingsService.Current.BackgroundOpacity);
+            ClampToScreen();
+        }
+
+        private void ClampToScreen()
+        {
+            var clamped = _positionService.EnsureVisiblePosition(Left, Top, Width > 0 ? Width : 320, Height > 0 ? Height : 250);
+            Left = clamped.X;
+            Top = clamped.Y;
+        }
+
+        private void DragHandle_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            if (!_viewModel.IsPositionLocked && e.ButtonState == MouseButtonState.Pressed)
+            {
+                DragMove();
+                _positionService.SavePosition(Left, Top);
+            }
+        }
+
+        private void CompactArea_MouseDoubleClick(object sender, MouseButtonEventArgs e)
+        {
+            if (e.ClickCount == 2)
+            {
+                _viewModel.CycleModeCommand.Execute(null);
+            }
+        }
+
+        private void Window_MouseWheel(object sender, MouseWheelEventArgs e)
+        {
+            // Scroll mouse wheel to adjust background opacity
+            double delta = e.Delta > 0 ? 0.05 : -0.05;
+            double current = _settingsService.Current.BackgroundOpacity;
+            double newOpacity = Math.Clamp(current + delta, 0.2, 1.0);
+
+            _settingsService.Current.BackgroundOpacity = newOpacity;
+            _themeService.ApplyTheme(_settingsService.Current.Theme, _settingsService.Current.AccentColorHex, newOpacity);
+            _settingsService.SaveSettings();
+        }
+
+        private void Window_KeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Escape)
+            {
+                if (_viewModel.Mode == Models.WidgetMode.Expanded)
+                {
+                    _viewModel.Mode = Models.WidgetMode.Standard;
+                }
+                else if (_viewModel.Mode == Models.WidgetMode.Standard)
+                {
+                    _viewModel.Mode = Models.WidgetMode.Compact;
+                }
+            }
+        }
+
+        private void ToggleClickThrough()
+        {
+            bool current = _settingsService.Current.EnableClickThrough;
+            bool newState = !current;
+            _settingsService.Current.EnableClickThrough = newState;
+            _settingsService.SaveSettings();
+
+            var handle = new WindowInteropHelper(this).Handle;
+            int exStyle = Win32Api.GetWindowLong(handle, Win32Api.GWL_EXSTYLE);
+
+            if (newState)
+            {
+                Win32Api.SetWindowLong(handle, Win32Api.GWL_EXSTYLE, exStyle | Win32Api.WS_EX_TRANSPARENT | 0x80000);
+            }
+            else
+            {
+                Win32Api.SetWindowLong(handle, Win32Api.GWL_EXSTYLE, (exStyle & ~Win32Api.WS_EX_TRANSPARENT) | 0x80000);
+            }
+        }
+
+        private void OpenSettings_Click(object sender, RoutedEventArgs e)
+        {
+            var app = (App)System.Windows.Application.Current;
+            app.ShowSettingsWindow();
+        }
+
+        private void OpenAbout_Click(object sender, RoutedEventArgs e)
+        {
+            var app = (App)System.Windows.Application.Current;
+            app.ShowAboutWindow();
+        }
+
+        private void Exit_Click(object sender, RoutedEventArgs e)
+        {
+            _positionService.SavePosition(Left, Top);
+            System.Windows.Application.Current.Shutdown();
+        }
+
+        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
+        {
+            _positionService.SavePosition(Left, Top);
+            _hotkeyManager.Dispose();
+        }
+    }
+}

src/PulseDock.App/Views/SettingsWindow.xaml

@@ -0,0 +1,94 @@
+<Window x:Class="PulseDock.App.Views.SettingsWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:models="clr-namespace:PulseDock.App.Models"
+        Title="PulseDock – Einstellungen" Height="520" Width="600"
+        WindowStartupLocation="CenterScreen" ResizeMode="NoResize"
+        Background="#14171E" Foreground="White">
+
+    <Grid Margin="16">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+
+        <!-- Header -->
+        <TextBlock Text="Einstellungen" FontSize="20" FontWeight="Bold" Foreground="White" Margin="0,0,0,16"/>
+
+        <!-- Tabbed Settings Container -->
+        <TabControl Grid.Row="1" Background="Transparent" BorderBrush="#30FFFFFF">
+            <!-- TAB 1: ALLGEMEIN -->
+            <TabItem Header="Allgemein" Foreground="White">
+                <StackPanel Margin="16">
+                    <CheckBox Content="Mit Windows starten (Autostart ohne Admin-Rechte)" IsChecked="{Binding StartWithWindows}" Foreground="White" Margin="0,8"/>
+                    <CheckBox Content="Immer im Vordergrund halten" IsChecked="{Binding AlwaysOnTop}" Foreground="White" Margin="0,8"/>
+                    <CheckBox Content="Widget-Position sperren" IsChecked="{Binding PositionLocked}" Foreground="White" Margin="0,8"/>
+                    <CheckBox Content="Click-Through-Modus aktivieren (Strg+Umschalt+F12)" IsChecked="{Binding EnableClickThrough}" Foreground="White" Margin="0,8"/>
+
+                    <TextBlock Text="Aktualisierungsintervall (Netzbetrieb in ms):" Foreground="#AAB4C3" Margin="0,16,0,4"/>
+                    <TextBox Text="{Binding Settings.UpdateIntervalMs, UpdateSourceTrigger=PropertyChanged}" Width="120" HorizontalAlignment="Left" Background="#20FFFFFF" Foreground="White" Padding="4"/>
+                </StackPanel>
+            </TabItem>
+
+            <!-- TAB 2: ANZEIGE -->
+            <TabItem Header="Anzeige" Foreground="White">
+                <StackPanel Margin="16">
+                    <TextBlock Text="Hintergrund-Transparenz:" Foreground="#AAB4C3" Margin="0,4,0,4"/>
+                    <Slider Minimum="0.2" Maximum="1.0" Value="{Binding BackgroundOpacity}" Width="300" HorizontalAlignment="Left"/>
+
+                    <CheckBox Content="Verlaufsdiagramme anzeigen" IsChecked="{Binding Settings.EnableCharts}" Foreground="White" Margin="0,16,0,8"/>
+                    <CheckBox Content="Top-Prozesse anzeigen" IsChecked="{Binding Settings.EnableProcessMonitoring}" Foreground="White" Margin="0,8"/>
+                </StackPanel>
+            </TabItem>
+
+            <!-- TAB 3: WARNUNGEN -->
+            <TabItem Header="Warnungen" Foreground="White">
+                <StackPanel Margin="16">
+                    <CheckBox Content="Windows-Benachrichtigungen aktivieren" IsChecked="{Binding Settings.EnableWindowsNotifications}" Foreground="White" Margin="0,8"/>
+                    <CheckBox Content="Akustische Signale bei kritischen Werten" IsChecked="{Binding Settings.EnableSoundAlerts}" Foreground="White" Margin="0,8"/>
+
+                    <Grid Margin="0,16,0,0">
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="200"/>
+                            <ColumnDefinition Width="100"/>
+                        </Grid.ColumnDefinitions>
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition Height="Auto"/>
+                            <RowDefinition Height="Auto"/>
+                        </Grid.RowDefinitions>
+
+                        <TextBlock Text="CPU Schwelle (%) :" Foreground="#AAB4C3" VerticalAlignment="Center"/>
+                        <TextBox Grid.Column="1" Text="{Binding Settings.Thresholds.CpuCriticalPercent}" Background="#20FFFFFF" Foreground="White" Padding="4" Margin="0,4"/>
+
+                        <TextBlock Grid.Row="1" Text="RAM Schwelle (%) :" Foreground="#AAB4C3" VerticalAlignment="Center"/>
+                        <TextBox Grid.Row="1" Grid.Column="1" Text="{Binding Settings.Thresholds.MemoryCriticalPercent}" Background="#20FFFFFF" Foreground="White" Padding="4" Margin="0,4"/>
+
+                        <TextBlock Grid.Row="2" Text="CPU Temp Schwelle (°C) :" Foreground="#AAB4C3" VerticalAlignment="Center"/>
+                        <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding Settings.Thresholds.CpuTempCriticalC}" Background="#20FFFFFF" Foreground="White" Padding="4" Margin="0,4"/>
+                    </Grid>
+                </StackPanel>
+            </TabItem>
+
+            <!-- TAB 4: LEISTUNG -->
+            <TabItem Header="Leistung &amp; Rechte" Foreground="White">
+                <StackPanel Margin="16">
+                    <CheckBox Content="Energiesparmodus im Akkubetribut nutzen" IsChecked="{Binding Settings.PowerSaverOnBattery}" Foreground="White" Margin="0,8"/>
+
+                    <TextBlock Text="Hardware-Sensoren &amp; Rechte:" Foreground="#AAB4C3" Margin="0,16,0,4"/>
+                    <TextBlock Text="PulseDock läuft ohne Administratorrechte. Einige erweiterten CPU/GPU-Lüftersponsoren benötigen Kernel-Rechte." Foreground="#80FFFFFF" TextWrapping="Wrap" Margin="0,0,0,12"/>
+
+                    <Button Content="🛡 Als Administrator neu starten" Command="{Binding RestartAsAdminCommand}"
+                            Background="#8A2BE2" Foreground="White" Padding="12,8" HorizontalAlignment="Left" BorderThickness="0"/>
+                </StackPanel>
+            </TabItem>
+        </TabControl>
+
+        <!-- Footer Buttons -->
+        <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,16,0,0">
+            <Button Content="Standardwerte" Command="{Binding ResetDefaultsCommand}" Background="#30FFFFFF" Foreground="White" Padding="12,6" Margin="0,0,8,0" BorderThickness="0"/>
+            <Button Content="Speichern &amp; Schließen" Click="SaveAndClose_Click" Background="#8A2BE2" Foreground="White" Padding="16,6" BorderThickness="0"/>
+        </StackPanel>
+    </Grid>
+</Window>

src/PulseDock.App/Views/SettingsWindow.xaml.cs

@@ -0,0 +1,23 @@
+using System.Windows;
+using PulseDock.App.ViewModels;
+
+namespace PulseDock.App.Views
+{
+    public partial class SettingsWindow : Window
+    {
+        private readonly SettingsViewModel _viewModel;
+
+        public SettingsWindow(SettingsViewModel viewModel)
+        {
+            InitializeComponent();
+            _viewModel = viewModel;
+            DataContext = _viewModel;
+        }
+
+        private void SaveAndClose_Click(object sender, RoutedEventArgs e)
+        {
+            _viewModel.SaveCommand.Execute(null);
+            Close();
+        }
+    }
+}