feat(viewer): add LastLoginBonusClaimedAt + LoginBonusStreak columns

Drops the unused daily_login_bonuses table in the same migration.

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

SVSim.Database/Migrations/20260613193716_AddViewerLoginBonusState.cs

@@ -0,0 +1,58 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SVSim.Database.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddViewerLoginBonusState : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "DailyLoginBonuses");
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "LastLoginBonusClaimedAt",
+                table: "Viewers",
+                type: "timestamp with time zone",
+                nullable: true);
+
+            migrationBuilder.AddColumn<int>(
+                name: "LoginBonusStreak",
+                table: "Viewers",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "LastLoginBonusClaimedAt",
+                table: "Viewers");
+
+            migrationBuilder.DropColumn(
+                name: "LoginBonusStreak",
+                table: "Viewers");
+
+            migrationBuilder.CreateTable(
+                name: "DailyLoginBonuses",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false),
+                    BonusData = table.Column<string>(type: "jsonb", nullable: false),
+                    BonusId = table.Column<int>(type: "integer", nullable: false),
+                    DateCreated = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    DateUpdated = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_DailyLoginBonuses", x => x.Id);
+                });
+        }
+    }
+}

SVSim.Database/Migrations/SVSimDbContextModelSnapshot.cs

@@ -1075,29 +1075,6 @@ namespace SVSim.Database.Migrations
                     b.ToTable("ColosseumWindFallDecks");
                 });
 
-            modelBuilder.Entity("SVSim.Database.Models.DailyLoginBonusEntry", b =>
-                {
-                    b.Property<int>("Id")
-                        .HasColumnType("integer");
-
-                    b.Property<string>("BonusData")
-                        .IsRequired()
-                        .HasColumnType("jsonb");
-
-                    b.Property<int>("BonusId")
-                        .HasColumnType("integer");
-
-                    b.Property<DateTime>("DateCreated")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.Property<DateTime?>("DateUpdated")
-                        .HasColumnType("timestamp with time zone");
-
-                    b.HasKey("Id");
-
-                    b.ToTable("DailyLoginBonuses");
-                });
-
             modelBuilder.Entity("SVSim.Database.Models.DefaultDeckEntry", b =>
                 {
                     b.Property<int>("Id")
@@ -2711,6 +2688,12 @@ namespace SVSim.Database.Migrations
                     b.Property<DateTime>("LastLogin")
                         .HasColumnType("timestamp with time zone");
 
+                    b.Property<DateTime?>("LastLoginBonusClaimedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("LoginBonusStreak")
+                        .HasColumnType("integer");
+
                     b.Property<int>("MyPageBgId")
                         .HasColumnType("integer");
 

SVSim.Database/Models/Viewer.cs

@@ -33,6 +33,18 @@ public class Viewer : BaseEntity<long>
     
     public DateTime LastLogin { get; set; }
 
+    /// <summary>
+    /// UTC instant of the most recent daily-login-bonus claim. Null = never claimed.
+    /// Compared against JST 02:00 day boundary via JstPeriod.DayKey to decide eligibility.
+    /// </summary>
+    public DateTime? LastLoginBonusClaimedAt { get; set; }
+
+    /// <summary>
+    /// 1-based position in the Normal login-bonus cycle. 0 = never claimed (first claim
+    /// will write 1). Wraps back to 1 after reaching cycle length (LoginBonusConfig.Normal.Count).
+    /// </summary>
+    public int LoginBonusStreak { get; set; }
+
     /// <summary>BGType enum: 0=Deck, 1=CustomBG, 2=RandomBG. Default 0 = follow equipped deck's leader skin.</summary>
     public int MyPageBgSelectType { get; set; }