feat(net): #13 read OptionFlags + Options1 after enchantments

First step of the PD trailer walk. Wraps trailer reads in their own
try/catch so a malformed trailer does not null out the upstream
attribute/skill/spell/enchantment data we already extracted.

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

src/AcDream.Core.Net/Messages/PlayerDescriptionParser.cs

@@ -309,26 +309,42 @@ public static class PlayerDescriptionParser
                 ReadSpellTable(payload, ref pos, spells);
 
             // ── Enchantments (Issue #7 / #12) ───────────────────────────────
-            // Outer EnchantmentMask + per-bucket count + N×Enchantment(60-64 B).
-            // Holtburger events.rs:462-501. After this block come options /
-            // shortcuts / hotbars / inventory / equipped — those need a
-            // heuristic walker for the variable-length gameplay_options blob.
-            // Filed as ISSUES.md #13 for follow-up; stop here cleanly so
-            // partial parses still populate enchantments.
             if (vectorFlags.HasFlag(DescriptionVectorFlag.Enchantment))
                 ReadEnchantmentBlock(payload, ref pos, enchantments);
 
+            // ── Trailer (Issue #13): options + shortcuts + hotbars + inventory ──
+            // Wrapped in its own try/catch — a malformed trailer must not destroy
+            // the attribute / skill / spell / enchantment data we already extracted.
+            CharacterOptionDataFlag optionFlags = CharacterOptionDataFlag.None;
+            uint options1 = 0;
+            uint options2 = 0;
+            uint spellbookFilters = 0;
+            List<ShortcutEntry> shortcuts = new();
+            List<IReadOnlyList<uint>> hotbarSpells = new();
+            List<(uint, uint)> desiredComps = new();
+            ReadOnlyMemory<byte> gameplayOptions = ReadOnlyMemory<byte>.Empty;
+            List<InventoryEntry> inventory = new();
+            List<EquippedEntry> equipped = new();
+
+            try
+            {
+                if (payload.Length - pos >= 8)
+                {
+                    optionFlags = (CharacterOptionDataFlag)ReadU32(payload, ref pos);
+                    options1 = ReadU32(payload, ref pos);
+                }
+            }
+            catch (FormatException)
+            {
+                // Trailer corrupted — keep what we have and return.
+            }
+
             return new Parsed(
                 weenieType, propertyFlags, vectorFlags, hasHealth,
                 bundle, positions, attributes, skills, spells, enchantments,
-                CharacterOptionDataFlag.None, 0u, 0u,
-                System.Array.Empty<ShortcutEntry>(),
-                System.Array.Empty<IReadOnlyList<uint>>(),
-                System.Array.Empty<(uint, uint)>(),
-                0u,
-                ReadOnlyMemory<byte>.Empty,
-                System.Array.Empty<InventoryEntry>(),
-                System.Array.Empty<EquippedEntry>());
+                optionFlags, options1, options2,
+                shortcuts, hotbarSpells, desiredComps, spellbookFilters,
+                gameplayOptions, inventory, equipped);
         }
         catch (FormatException ex)
         {

tests/AcDream.Core.Net.Tests/PlayerDescriptionParserTests.cs

@@ -334,4 +334,33 @@ public sealed class PlayerDescriptionParserTests
         Assert.Equal(2.0f, parsed.Value.Spells[1234u]);
         Assert.Equal(2.0f, parsed.Value.Spells[5678u]);
     }
+
+    [Fact]
+    public void TryParse_TrailerOptionFlagsAndOptions1_AreReadAfterEnchantments()
+    {
+        // ATTRIBUTE | ENCHANTMENT vector flag; empty enchantment mask (0).
+        // After mask, trailer adds u32 option_flags + u32 options1.
+        var sb = new MemoryStream();
+        using var writer = new BinaryWriter(sb);
+        writer.Write(0u);              // propertyFlags
+        writer.Write(0x52u);            // weenieType
+        writer.Write(0x201u);           // ATTRIBUTE | ENCHANTMENT
+        writer.Write(1u);               // has_health
+        writer.Write(0u);               // empty attribute_flags
+
+        writer.Write(0u);               // EnchantmentMask = empty
+
+        // Trailer header: option_flags + options1
+        writer.Write(0u);               // option_flags = None — no further sections
+        writer.Write(0xDEADBEEFu);      // options1 sentinel
+
+        // No more bytes — spellbook_filters is optional (defaults to 0).
+        var parsed = PlayerDescriptionParser.TryParse(sb.ToArray());
+
+        Assert.NotNull(parsed);
+        Assert.Equal(PlayerDescriptionParser.CharacterOptionDataFlag.None, parsed!.Value.OptionFlags);
+        Assert.Equal(0xDEADBEEFu, parsed.Value.Options1);
+        Assert.Empty(parsed.Value.Shortcuts);
+        Assert.Empty(parsed.Value.Inventory);
+    }
 }