fix(movement): reject server teleports to corrupted near-origin positions

The server can persist a corrupted near-origin position on map 0 (from a
faulty area-trigger destination) across sessions. On re-login it sends the
bad position via LOGIN_VERIFY_WORLD; if the player walks into the offending
trigger again the server re-teleports there, and our heartbeats reinforce
the bad save — creating a permanent teleport loop.

Defenses added:
- handleTeleportAck rejects MSG_MOVE_TELEPORT to near-origin on map 0
  (no position update, no ACK, no world reload)
- applyPlayerTransportState rejects player UPDATE_OBJECT MOVEMENT blocks
  pushing the same bad position
- sendMovement blocks heartbeats originating from near-origin so the
  server cannot persist the bad save
- 10-second area-trigger cooldown after teleport / world entry / login
  (replaces the one-shot suppress flag that re-fired on jitter)
- Immediate STOP+HEARTBEAT after teleport ACK / WORLDPORT ACK / login
  to sync the real position with the server promptly
- CMSG_AREATRIGGER firing now logged at WARNING level for diagnosis

include/game/game_handler.hpp

@@ -2332,6 +2332,7 @@ public:
     auto& areaTriggerMsgsRef() { return areaTriggerMsgs_; }
     auto& areaTriggersRef() { return areaTriggers_; }
     auto& areaTriggerSuppressFirstRef() { return areaTriggerSuppressFirst_; }
+    auto& areaTriggerCooldownRef() { return areaTriggerCooldown_; }
 
     // ── Death & Resurrection ─────────────────────────────────────────
     auto& playerDeadRef() { return playerDead_; }
@@ -2944,6 +2945,7 @@ private:
     std::unordered_set<uint32_t> activeAreaTriggers_;  // triggers player is currently inside
     float areaTriggerCheckTimer_ = 0.0f;
     bool areaTriggerSuppressFirst_ = false;  // suppress first check after map transfer
+    float areaTriggerCooldown_ = 0.0f;       // seconds remaining — suppress ALL triggers
 
     std::array<ActionBarSlot, ACTION_BAR_SLOTS> actionBar{};
     std::unordered_map<uint32_t, std::string> macros_;  // client-side macro text (persisted in char config)