Feature/misc UI tweaks and refactorings (#3)

* feat: add AppSettings model and database migration for application settings

* feat: implement file deletion functionality with UI for pending deletions

Author: jaybarden1

src/AStar.Dev.File.App/App.axaml.cs

@@ -16,6 +16,10 @@ public partial class App : Application
 {
     private IServiceProvider? _services;
 
+    public IServiceProvider? Services => _services;
+
+    public T? GetService<T>() where T : class => _services?.GetService(typeof(T)) as T;
+
     public override void Initialize()
     {
         AvaloniaXamlLoader.Load(this);
@@ -56,8 +60,10 @@ private static IServiceProvider BuildServices()
 
         services.AddSingleton<IFileTypeClassifier, FileTypeClassifier>();
         services.AddSingleton<IFolderPickerService, FolderPickerService>();
+        services.AddSingleton<IFileDeleteService, FileDeleteService>();
         services.AddTransient<IFileScannerService, FileScannerService>();
         services.AddTransient<MainWindowViewModel>();
+        services.AddTransient<DeletePendingViewModel>();
 
         return services.BuildServiceProvider();
     }

src/AStar.Dev.File.App/Data/FileAppDbContext.cs

@@ -6,6 +6,7 @@ namespace AStar.Dev.File.App.Data;
 public class FileAppDbContext(DbContextOptions<FileAppDbContext> options) : DbContext(options)
 {
     public DbSet<ScannedFile> ScannedFiles => Set<ScannedFile>();
+    public DbSet<AppSetting> AppSettings => Set<AppSetting>();
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -19,5 +20,11 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
             entity.Property(e => e.FileType)
                   .HasConversion<string>();
         });
+
+        modelBuilder.Entity<AppSetting>(entity =>
+        {
+            entity.HasKey(e => e.Id);
+            entity.HasIndex(e => e.Key).IsUnique();
+        });
     }
 }

src/AStar.Dev.File.App/Migrations/20260401200334_AddAppSettings.Designer.cs

@@ -0,0 +1,41 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace AStar.Dev.File.App.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAppSettings : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "AppSettings",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    Key = table.Column<string>(type: "TEXT", nullable: false),
+                    Value = table.Column<string>(type: "TEXT", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AppSettings", x => x.Id);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AppSettings_Key",
+                table: "AppSettings",
+                column: "Key",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "AppSettings");
+        }
+    }
+}

src/AStar.Dev.File.App/Migrations/20260401200334_AddAppSettings.cs

@@ -17,6 +17,28 @@ protected override void BuildModel(ModelBuilder modelBuilder)
 #pragma warning disable 612, 618
             modelBuilder.HasAnnotation("ProductVersion", "10.0.4");
 
+            modelBuilder.Entity("AStar.Dev.File.App.Models.AppSetting", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Key")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Value")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Key")
+                        .IsUnique();
+
+                    b.ToTable("AppSettings");
+                });
+
             modelBuilder.Entity("AStar.Dev.File.App.Models.ScannedFile", b =>
                 {
                     b.Property<int>("Id")

src/AStar.Dev.File.App/Migrations/FileAppDbContextModelSnapshot.cs

@@ -0,0 +1,10 @@
+namespace AStar.Dev.File.App.Models;
+
+public class AppSetting
+{
+    public int Id { get; set; }
+
+    public required string Key { get; set; }
+
+    public required string Value { get; set; }
+}