Fix API offset limit 400 Bad Request, implement requested UI/UX improvements

src/Predictalytics.Infrastructure/Migrations/20260706160010_AddBackgroundJobs.cs

@@ -0,0 +1,67 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Predictalytics.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddBackgroundJobs : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "BackgroundJobs",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    JobType = table.Column<string>(type: "varchar(64)", maxLength: 64, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Status = table.Column<string>(type: "varchar(64)", maxLength: 64, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    TraderId = table.Column<int>(type: "int", nullable: true),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    StartedAt = table.Column<DateTime>(type: "datetime(6)", nullable: true),
+                    CompletedAt = table.Column<DateTime>(type: "datetime(6)", nullable: true),
+                    ErrorMessage = table.Column<string>(type: "varchar(4096)", maxLength: 4096, nullable: true)
+                        .Annotation("MySql:CharSet", "utf8mb4")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_BackgroundJobs", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_BackgroundJobs_Traders_TraderId",
+                        column: x => x.TraderId,
+                        principalTable: "Traders",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.SetNull);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_BackgroundJobs_JobType",
+                table: "BackgroundJobs",
+                column: "JobType");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_BackgroundJobs_Status",
+                table: "BackgroundJobs",
+                column: "Status");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_BackgroundJobs_TraderId",
+                table: "BackgroundJobs",
+                column: "TraderId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "BackgroundJobs");
+        }
+    }
+}

src/Predictalytics.Infrastructure/Migrations/20260706182931_AddPositionCheckpoints.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Predictalytics.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddPositionCheckpoints : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<long>(
+                name: "LastAppliedTradeId",
+                table: "TraderPositions",
+                type: "bigint",
+                nullable: false,
+                defaultValue: 0L);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "LastAppliedTradeId",
+                table: "TraderPositions");
+        }
+    }
+}

src/Predictalytics.Infrastructure/Migrations/20260706185428_AddMarketEnhancements.cs

@@ -0,0 +1,51 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Predictalytics.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddMarketEnhancements : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "ClosedAt",
+                table: "Markets",
+                type: "datetime(6)",
+                nullable: true);
+
+            migrationBuilder.AddColumn<decimal>(
+                name: "FeeRateBps",
+                table: "Markets",
+                type: "decimal(65,30)",
+                nullable: false,
+                defaultValue: 0m);
+
+            migrationBuilder.AddColumn<bool>(
+                name: "IsNegRisk",
+                table: "Markets",
+                type: "tinyint(1)",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ClosedAt",
+                table: "Markets");
+
+            migrationBuilder.DropColumn(
+                name: "FeeRateBps",
+                table: "Markets");
+
+            migrationBuilder.DropColumn(
+                name: "IsNegRisk",
+                table: "Markets");
+        }
+    }
+}

src/Predictalytics.Infrastructure/Migrations/20260706200702_AddBankroll.cs

@@ -0,0 +1,40 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Predictalytics.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddBankroll : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<decimal>(
+                name: "CurrentBalance",
+                table: "TraderAnalytics",
+                type: "decimal(65,30)",
+                nullable: false,
+                defaultValue: 0m);
+
+            migrationBuilder.AddColumn<decimal>(
+                name: "EstimatedBankroll",
+                table: "TraderAnalytics",
+                type: "decimal(65,30)",
+                nullable: false,
+                defaultValue: 0m);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "CurrentBalance",
+                table: "TraderAnalytics");
+
+            migrationBuilder.DropColumn(
+                name: "EstimatedBankroll",
+                table: "TraderAnalytics");
+        }
+    }
+}

src/Predictalytics.Infrastructure/Migrations/AppDbContextModelSnapshot.cs

@@ -191,6 +191,9 @@ namespace Predictalytics.Infrastructure.Migrations
                         .HasMaxLength(64)
                         .HasColumnType("varchar(64)");
 
+                    b.Property<DateTime?>("ClosedAt")
+                        .HasColumnType("datetime(6)");
+
                     b.Property<string>("ConditionId")
                         .IsRequired()
                         .HasMaxLength(256)
@@ -212,10 +215,16 @@ namespace Predictalytics.Infrastructure.Migrations
                     b.Property<int>("EventId")
                         .HasColumnType("int");
 
+                    b.Property<decimal>("FeeRateBps")
+                        .HasColumnType("decimal(65,30)");
+
                     b.Property<string>("ImageUrl")
                         .HasMaxLength(1024)
                         .HasColumnType("varchar(1024)");
 
+                    b.Property<bool>("IsNegRisk")
+                        .HasColumnType("tinyint(1)");
+
                     b.Property<bool>("IsResolved")
                         .HasColumnType("tinyint(1)");
 
@@ -620,6 +629,12 @@ namespace Predictalytics.Infrastructure.Migrations
                     b.Property<int>("TraderId")
                         .HasColumnType("int");
 
+                    b.Property<decimal>("CurrentBalance")
+                        .HasColumnType("decimal(65,30)");
+
+                    b.Property<decimal>("EstimatedBankroll")
+                        .HasColumnType("decimal(65,30)");
+
                     b.Property<DateTime>("LastCalculatedAt")
                         .HasColumnType("datetime(6)");
 
@@ -715,6 +730,9 @@ namespace Predictalytics.Infrastructure.Migrations
                         .HasPrecision(10, 6)
                         .HasColumnType("decimal(10,6)");
 
+                    b.Property<long>("LastAppliedTradeId")
+                        .HasColumnType("bigint");
+
                     b.Property<DateTime>("LastUpdatedAt")
                         .HasColumnType("datetime(6)");