physics: implement HOVER movement flag physics in CameraController

When the server sets MovementFlags::HOVER (SMSG_MOVE_SET_HOVER), the
player now floats 4 yards above the nearest ground surface instead of
standing on it. Uses the existing floor-snap path with a HOVER_HEIGHT
offset applied to the snap target.

- game_handler.hpp: add isHovering() accessor (reads HOVER flag from
  movementInfo.flags, which is already set by handleForceMoveFlagChange)
- camera_controller.hpp: add hoverActive_ field and setHoverActive()
- camera_controller.cpp: apply HOVER_HEIGHT = 4.0f offset at floor snap
- application.cpp: sync hover state each frame alongside other movement
  states (gravity, feather fall, water walk, flying)

include/game/game_handler.hpp

@@ -1173,6 +1173,9 @@ public:
                                  static_cast<uint32_t>(MovementFlags::FLYING);
         return (movementInfo.flags & flyMask) == flyMask;
     }
+    bool isHovering() const {
+        return (movementInfo.flags & static_cast<uint32_t>(MovementFlags::HOVER)) != 0;
+    }
     void dismount();
 
     // Taxi / Flight Paths

include/rendering/camera_controller.hpp

@@ -102,6 +102,7 @@ public:
     void setFeatherFallActive(bool active) { featherFallActive_ = active; }
     void setWaterWalkActive(bool active) { waterWalkActive_ = active; }
     void setFlyingActive(bool active) { flyingActive_ = active; }
+    void setHoverActive(bool active) { hoverActive_ = active; }
     void setMounted(bool m) { mounted_ = m; }
     void setMountHeightOffset(float offset) { mountHeightOffset_ = offset; }
     void setExternalFollow(bool enabled) { externalFollow_ = enabled; }
@@ -292,6 +293,8 @@ private:
     bool waterWalkActive_ = false;
     // Player-controlled flight (CAN_FLY + FLYING): 3D movement, no gravity.
     bool flyingActive_ = false;
+    // Server-driven hover (HOVER flag): float at fixed height above ground.
+    bool hoverActive_ = false;
     bool mounted_ = false;
     float mountHeightOffset_ = 0.0f;
     bool externalMoving_ = false;

src/core/application.cpp

@@ -1018,6 +1018,7 @@ void Application::update(float deltaTime) {
                     renderer->getCameraController()->setFeatherFallActive(gameHandler->isFeatherFalling());
                     renderer->getCameraController()->setWaterWalkActive(gameHandler->isWaterWalking());
                     renderer->getCameraController()->setFlyingActive(gameHandler->isPlayerFlying());
+                    renderer->getCameraController()->setHoverActive(gameHandler->isHovering());
                 }
 
                 bool onTaxi = gameHandler &&

src/rendering/camera_controller.cpp

@@ -1249,7 +1249,10 @@ void CameraController::update(float deltaTime) {
                                    dz >= -0.25f && dz <= stepUp * 1.5f);
 
                 if (dz >= -fallCatch && (nearGround || airFalling || slopeGrace)) {
-                    targetPos.z = *groundH;
+                    // HOVER: float at fixed height above ground instead of standing on it
+                    static constexpr float HOVER_HEIGHT = 4.0f;  // ~4 yards above ground
+                    const float snapH = hoverActive_ ? (*groundH + HOVER_HEIGHT) : *groundH;
+                    targetPos.z = snapH;
                     verticalVelocity = 0.0f;
                     grounded = true;
                     lastGroundZ = *groundH;