fix(tutorial): gift_receive reward_list carries post-state totals, not deltas

The client's PlayerStaticData.UpdateHaveUserGoodsNumByJsonData does direct
assignment on each reward_list entry's reward_num, so currency/item totals
must be the new viewer balance — not the gift delta. Fresh accounts were
seeing their cached crystal/rupy balances clobbered down to the gift counts
until the next /load/index. Matches the project_wire_reward_list_post_state
memory and the prod capture (which shows 120 rupy = baseline 20 + gift 100).

SVSim.EmulatedEntrypoint/Controllers/GiftController.cs

@@ -154,19 +154,47 @@ public class GiftController : SVSimController
                 .Select(p => Clone(p, nowString))
                 .ToList(),
             IsUnreceivedPresent = false,
+            // reward_list entries must carry POST-STATE TOTALS, not gift deltas.
+            // The client's PlayerStaticData.UpdateHaveUserGoodsNumByJsonData does direct
+            // assignment on each entry's reward_num — emitting the delta would clobber
+            // the client-side cached balance down to the gift amount until the next /load/index.
+            // See project memory: project_wire_reward_list_post_state.
             RewardList = TutorialGifts
                 .Where(p => requestedIds.Contains(p.PresentId))
                 .Select(p => new GiftRewardListEntry
                 {
                     RewardType = p.RewardType,
                     RewardId = p.RewardDetailId,
-                    RewardNum = p.RewardCount,
+                    RewardNum = ResolvePostStateRewardNum(p, viewer),
                 })
                 .ToList(),
             TutorialStep = 41,
         };
     }
 
+    /// <summary>
+    /// Returns the post-grant viewer balance for the given gift entry, not the gift delta.
+    /// reward_list on wire carries post-state totals (client does direct assignment).
+    /// </summary>
+    private static string ResolvePostStateRewardNum(PresentDto gift, SVSim.Database.Models.Viewer viewer)
+    {
+        switch (gift.RewardType)
+        {
+            case "1":  // Crystal
+                return ((long)viewer.Currency.Crystals).ToString(System.Globalization.CultureInfo.InvariantCulture);
+            case "9":  // Rupy
+                return ((long)viewer.Currency.Rupees).ToString(System.Globalization.CultureInfo.InvariantCulture);
+            case "4":  // Item
+            {
+                int itemId = int.Parse(gift.RewardDetailId, System.Globalization.CultureInfo.InvariantCulture);
+                var owned = viewer.Items.FirstOrDefault(i => i.Item.Id == itemId);
+                return ((long)(owned?.Count ?? 0)).ToString(System.Globalization.CultureInfo.InvariantCulture);
+            }
+            default:
+                return gift.RewardCount;  // unknown type — fall back to gift count (better than 0)
+        }
+    }
+
     private static UserGoodsType WireRewardTypeToUserGoodsType(int wireType) => wireType switch
     {
         1 => UserGoodsType.Crystal,