Initial commit: Purrse personal finance app

Self-hosted, plugin-extensible personal finance manager built with
ASP.NET Core 9.0, Vue 3 + Vuetify 3, and PostgreSQL 17.

Backend (8 .NET projects):
- Core: 19 domain models, 6 enums, 14 DTOs, 12 service interfaces
- Data: EF Core DbContext, 16 entity configurations, category seeder
- API: 14 controllers, 15 services, JWT auth, SignalR, middleware
- Plugins: Abstractions + OFX/CSV/QIF file parsers
- Tests: 28 xUnit tests (fingerprinting, duplicate detection, parsers)

Frontend (Vue 3 + Vuetify 3 + TypeScript):
- 13 views, Pinia stores, Axios API services with JWT interceptors
- Dashboard, accounts, transactions, categories, imports, and more

Deployment:
- Docker Compose (PostgreSQL 17 + .NET API + nginx frontend)
- Auto-migration on startup

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

src/Purrse.Api/Services/FileWatcherService.cs

@@ -0,0 +1,47 @@
+namespace Purrse.Api.Services;
+
+public class FileWatcherService : BackgroundService
+{
+    private readonly IServiceScopeFactory _scopeFactory;
+    private readonly ILogger<FileWatcherService> _logger;
+    private readonly string _importsPath;
+    private FileSystemWatcher? _watcher;
+
+    public FileWatcherService(IServiceScopeFactory scopeFactory, ILogger<FileWatcherService> logger, IConfiguration config)
+    {
+        _scopeFactory = scopeFactory;
+        _logger = logger;
+        _importsPath = config["Imports:WatchPath"] ?? Path.Combine(AppContext.BaseDirectory, "imports");
+    }
+
+    protected override Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        if (!Directory.Exists(_importsPath))
+            Directory.CreateDirectory(_importsPath);
+
+        _watcher = new FileSystemWatcher(_importsPath)
+        {
+            NotifyFilter = NotifyFilters.FileName | NotifyFilters.CreationTime,
+            EnableRaisingEvents = true
+        };
+
+        _watcher.Created += OnFileCreated;
+
+        _logger.LogInformation("File watcher started, monitoring: {Path}", _importsPath);
+
+        stoppingToken.Register(() =>
+        {
+            _watcher?.Dispose();
+            _logger.LogInformation("File watcher stopped");
+        });
+
+        return Task.CompletedTask;
+    }
+
+    private void OnFileCreated(object sender, FileSystemEventArgs e)
+    {
+        _logger.LogInformation("New file detected: {FileName}", e.Name);
+        // Files dropped here can be processed by the import service
+        // A SignalR notification would be sent to connected clients
+    }
+}