Make GC EXP enable shim inert and dedupe dispatch

src/Client.hh

@@ -19,6 +19,7 @@
 #include "QuestScript.hh"
 #include "TeamIndex.hh"
 #include "Text.hh"
+#include <string>
 
 extern const uint64_t CLIENT_CONFIG_MAGIC;
 
@@ -147,6 +148,8 @@ public:
 
   // Basic state
   uint64_t enabled_flags = DEFAULT_FLAGS; // Client::Flag enum
+  std::string last_psopeeps_gc_exp_key;
+  void* last_psopeeps_gc_exp_lobby = nullptr;
   uint32_t specific_version = 0;
   uint8_t override_section_id = 0xFF; // FF = no override
   uint8_t override_lobby_event = 0xFF; // FF = no override