feat(pack): accrue gacha points on /pack/open (skip tutorial)

SVSim.EmulatedEntrypoint/Controllers/PackController.cs

@@ -246,6 +246,7 @@ public class PackController : SVSimController
 
         var viewer = await _db.Viewers
             .Include(v => v.PackOpenCounts)
+            .Include(v => v.GachaPointBalances)
             .Include(v => v.MissionData)
             .Include(v => v.Items).ThenInclude(i => i.Item)
             .AsSplitQuery()
@@ -318,6 +319,13 @@ public class PackController : SVSimController
         var draw = _opener.Draw(pack, _pools, drawCount, request.ExcludeCardIds, _rng);
         var grant = await _acquisition.GrantManyAsync(viewerId, draw.Cards.Select(c => c.CardId));
 
+        // Accrue gacha points (skip tutorial path — the starter pack isn't a real open).
+        if (!isTutorialPath)
+        {
+            _gachaPoint.Accrue(viewer, pack, child, drawCount);
+            await _db.SaveChangesAsync();
+        }
+
         // Build reward_list. The service produces the type=5 (Card) entries with post-state counts
         // plus any cosmetic grants. Currency entry (type=2 Crystals or type=9 Rupy) stays in the
         // controller — it's a pack-purchase concern, not a card-grant concern. The client's