ESP working: NPC detection + authoritative server-side health

- entitylist slot 6 (GetHighestEntityIndex); class name via
  GetClientNetworkable -> GetClientClass (replaces the unsafe slot-2 call)
- HL2 SP NPCs: class CAI_BaseNPC + m_lifeState, since NPC m_iHealth is not
  networked; model names from VModelInfoClient006 for labels/friend-foe
- real HP/HP-max from the listen-server entity (IVEngineServer021 ->
  PEntityOfEntIndex -> edict->m_pUnk -> GetBaseEntity) using offsets scanned
  from server.so's datamap; validated against the client model index
- world_to_screen via IVDebugOverlay003::ScreenPosition (fixes box drift)
- maxs sanity clamp, NPC-only debug logging, neutral colour for wildlife
- build.sh: restore -o libhl2hake.so and add server.cpp

1 files changed, 13 insertions, 2 deletions

diff --git a/src/hl2h.h b/src/hl2h.h
index d6a005e..b693617 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -36,7 +36,7 @@ struct Module {
     return false;
   }
 };
-extern Module g_client, g_engine;
+extern Module g_client, g_engine, g_server;
 
 // ---------------------------------------------------------------------------
 // game interfaces
@@ -48,6 +48,9 @@ struct GameInterfaces {
   void *client = nullptr;
   void *entitylist = nullptr;
   void *engine = nullptr;
+  void *modelinfo = nullptr;    // IVModelInfoClient006 (model index -> model name)
+  void *engineserver = nullptr; // IVEngineServer021 (edict access, incl. server entities)
+  void *debugoverlay = nullptr; // IVDebugOverlay003 (engine-accurate world->screen)
 };
 extern GameInterfaces g_iface;
 
@@ -70,9 +73,13 @@ struct NetVars {
   int viewoffset = -1;
   int mins = -1;
   int maxs = -1;
+  int lifestate = -1;
+  int modelindex = -1;
   // ponytail: mins/maxs may be absent from some HL2 netvar tables; esp.cpp falls back to h=72
   bool ok() const { return flags >= 0 && velocity >= 0 && movetype >= 0; }
-  bool esp_ok() const { return ok() && health >= 0 && maxhealth >= 0 && teamnum >= 0 && origin >= 0 && viewoffset >= 0; }
+  // ponytail: m_iMaxHealth isn't a netvar in HL2 SP; esp.cpp falls back to 100.
+  // m_iHealth only ever updates for players — NPCs are detected via m_lifeState.
+  bool esp_ok() const { return ok() && health >= 0 && teamnum >= 0 && origin >= 0 && viewoffset >= 0; }
 };
 extern NetVars g_net;
 
@@ -139,6 +146,10 @@ void fix_verified_crc(int seq, uint32_t crc);
 uint32_t usercmd_checksum(const CUserCmd *c);
 bool find_input_global();
 void resolve_netvars();
+int class_health_off(const char *name);
+bool resolve_server_netvars();
+int server_entity_health(int idx, int *maxhealth, int *lifestate, void **base_out);
+int server_model_index(void *base);
 void find_modules();
 void init_conmsg();
 bool feature_active(int feature);