chore(config): split NormalBonusEntry, strengthen Normal-defaults warning

File-per-class convention + explicit warning against the property-initializer
collection-default bug class (2026-05-24).

SVSim.Database/Models/Config/LoginBonusConfig.cs

@@ -17,8 +17,11 @@ public class LoginBonusConfig
     public string Img { get; set; } = "0";
 
     /// <summary>
-    /// Normal-cycle reward entries, 1-based by Day. Defaults to a 15-day cycle copied
+    /// Normal-cycle reward entries, 1-based by Day. Defaults to <c>new()</c> (empty);
-    /// verbatim from the prod tutorial capture (traffic_prod_tutorial.ndjson).
+    /// real entries live in <see cref="ShippedDefaults"/>. <b>Do not move them into this
+    /// property initializer</b> — collection initializers silently empty out under
+    /// <c>GameConfigService.Get&lt;T&gt;()</c>'s tier-merge (config-defaults convention,
+    /// historical bug 2026-05-24).
     /// </summary>
     public List<NormalBonusEntry> Normal { get; set; } = new();
 
@@ -47,12 +50,3 @@ public class LoginBonusConfig
         },
     };
 }
-
-public class NormalBonusEntry
-{
-    public int Day { get; set; }
-    public int EffectId { get; set; } = 1;
-    public UserGoodsType RewardType { get; set; }
-    public long RewardDetailId { get; set; }
-    public int RewardNumber { get; set; }
-}

SVSim.Database/Models/Config/NormalBonusEntry.cs

@@ -0,0 +1,12 @@
+using SVSim.Database.Enums;
+
+namespace SVSim.Database.Models.Config;
+
+public class NormalBonusEntry
+{
+    public int Day { get; set; }
+    public int EffectId { get; set; } = 1;
+    public UserGoodsType RewardType { get; set; }
+    public long RewardDetailId { get; set; }
+    public int RewardNumber { get; set; }
+}