Initial commit: EngineeringSync v1.0.0

Vollständige Implementierung des EngineeringSync-Middleware-Tools:
- Windows Service (Kestrel :5050) mit FileSystemWatcher + SignalR
- WPF Tray-App mit PendingChanges- und Projektverwaltungs-Fenster
- Setup-Wizard (8-Schritte-Installer)
- SQLite/EF Core Datenschicht (WAL-Modus)
- SHA-256-basiertes Debouncing (2s Fenster)
- Backup-System mit konfigurierbarer Aufbewahrung

Bugfixes & Verbesserungen:
- BUG-1: AppDbContext OnConfiguring invertierte Bedingung behoben
- BUG-2: Event-Handler-Leak in TrayApp (Fenster-Singleton-Pattern)
- BUG-3: ProjectConfigChanged SignalR-Signal in allen CRUD-Endpoints
- BUG-5: Rename-Sync löscht alte Datei im Simulations-Ordner
- BUG-6: Doppeltes Dispose von SignalR verhindert
- BUG-7: Registry-Deinstallation nur EngineeringSync-Eintrag entfernt
- S1: Path-Traversal-Schutz via SafeCombine() im SyncManager
- E1: FSW Buffer 64KB + automatischer Re-Scan bei Overflow
- E2: Retry-Logik (3x) für gesperrte Dateien mit exponentiellem Backoff
- E4: Channel.Writer.TryComplete() beim Shutdown
- C2: HubMethodNames-Konstanten statt Magic Strings
- E3: Pagination in Changes-API (page/pageSize Query-Parameter)
- A1: Fire-and-Forget mit try/catch + Logging

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

EngineeringSync.Domain/Constants/HubMethodNames.cs

@@ -0,0 +1,7 @@
+namespace EngineeringSync.Domain.Constants;
+
+public static class HubMethodNames
+{
+    public const string ReceiveChangeNotification = "ReceiveChangeNotification";
+    public const string ProjectConfigChanged = "ProjectConfigChanged";
+}

EngineeringSync.Domain/EngineeringSync.Domain.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

EngineeringSync.Domain/Entities/FileRevision.cs

@@ -0,0 +1,12 @@
+namespace EngineeringSync.Domain.Entities;
+
+public class FileRevision
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid ProjectId { get; set; }
+    public ProjectConfig Project { get; set; } = null!;
+    public string RelativePath { get; set; } = string.Empty;
+    public string FileHash { get; set; } = string.Empty;
+    public long Size { get; set; }
+    public DateTime LastModified { get; set; }
+}

EngineeringSync.Domain/Entities/PendingChange.cs

@@ -0,0 +1,14 @@
+namespace EngineeringSync.Domain.Entities;
+
+public class PendingChange
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid ProjectId { get; set; }
+    public ProjectConfig Project { get; set; } = null!;
+    public string RelativePath { get; set; } = string.Empty;
+    public ChangeType ChangeType { get; set; }
+    public string? OldRelativePath { get; set; }
+    public ChangeStatus Status { get; set; } = ChangeStatus.Pending;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime? SyncedAt { get; set; }
+}

EngineeringSync.Domain/Entities/ProjectConfig.cs

@@ -0,0 +1,28 @@
+namespace EngineeringSync.Domain.Entities;
+
+public class ProjectConfig
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public string Name { get; set; } = string.Empty;
+    public string EngineeringPath { get; set; } = string.Empty;
+    public string SimulationPath { get; set; } = string.Empty;
+    /// <summary>Komma-separiert, z.B. ".jt,.cojt,.xml"</summary>
+    public string FileExtensions { get; set; } = string.Empty;
+    public bool IsActive { get; set; } = true;
+    public bool BackupEnabled { get; set; } = true;
+    public string? BackupPath { get; set; } = null;
+    public int MaxBackupsPerFile { get; set; } = 0;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public ICollection<FileRevision> FileRevisions { get; set; } = [];
+    public ICollection<PendingChange> PendingChanges { get; set; } = [];
+
+    public IEnumerable<string> GetExtensions()
+    {
+        // Wenn leer oder "*" → alle Dateien beobachten
+        if (string.IsNullOrWhiteSpace(FileExtensions) || FileExtensions.Trim() == "*")
+            return ["*"];
+        
+        return FileExtensions.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+    }
+}

EngineeringSync.Domain/Enums/ChangeStatus.cs

@@ -0,0 +1,8 @@
+namespace EngineeringSync.Domain.Entities;
+
+public enum ChangeStatus
+{
+    Pending,
+    Synced,
+    Ignored
+}

EngineeringSync.Domain/Enums/ChangeType.cs

@@ -0,0 +1,9 @@
+namespace EngineeringSync.Domain.Entities;
+
+public enum ChangeType
+{
+    Created,
+    Modified,
+    Renamed,
+    Deleted
+}