Vanilla/Turtle WoW compatibility: fix UPDATE_OBJECT, chat, equipment, creatures

- Route SMSG_UPDATE_OBJECT through polymorphic parsers for correct
  vanilla format (uint8 updateFlags, 6 speeds vs WotLK uint16/9)
- Fix SMSG_DESTROY_OBJECT for vanilla (8 bytes, no isDeath field)
- Add MSG_MOVE_* handlers for other player movement relay
- Add ClassicPacketParsers::parseMessageChat with targetGuid read
  and monster-type name handling
- Resolve chat sender names from player name cache before display
- Fix CSV DBC field 0 always treated as numeric ID (fixes 16+ garbled
  Turtle CSVs including Map, AreaTable, Spell, CreatureDisplayInfo)
- Add CSV DBC validation: reject garbled CSVs (>80% zero IDs) and
  fall back to binary DBC files
- Fix ItemDisplayInfo texture component field index (14+ not 15+)
  for binary DBC with gender-aware suffix resolution
- Spawn other players as visible M2 models via creature callback
- Map name cache dedup prevents overwrites from duplicate CSV records

src/core/application.cpp

@@ -2386,7 +2386,7 @@ void Application::loadOnlineWorldTerrain(uint32_t mapId, float x, float y, float
             for (uint32_t i = 0; i < mapDbc->getRecordCount(); i++) {
                 uint32_t id = mapDbc->getUInt32(i, mapL ? (*mapL)["ID"] : 0);
                 std::string internalName = mapDbc->getString(i, mapL ? (*mapL)["InternalName"] : 1);
-                if (!internalName.empty()) {
+                if (!internalName.empty() && mapNameById.find(id) == mapNameById.end()) {
                     mapNameById[id] = std::move(internalName);
                 }
             }