fix(go): repair migration wire contracts and runtime lifecycle; document incomplete port

internal/gameserver/movement.go

@@ -0,0 +1,54 @@
+package gameserver
+
+import (
+	"fmt"
+	"math"
+
+	"ananta-ps/pkg/protocol"
+)
+
+// Both movement RPCs carry a List7Bit of inline structs. LogicAgentSyncData
+// has no MoveId; SimpleMoveActionData adds one byte after the two vectors.
+func (s *Server) handleMovementReport(sess *Session, pkt *protocol.RpcPacket, simple bool) error {
+	r := protocol.NewUxReader(pkt.Body)
+	mark, err := r.U8()
+	if err != nil {
+		return err
+	}
+	if mark == 0 && r.Remaining() == 0 {
+		return sess.ReturnEmptyOk(pkt.InvokeID, pkt.MethodID)
+	}
+	if mark != 0xff {
+		return fmt.Errorf("invalid movement list marker")
+	}
+	count, err := r.Int7()
+	if err != nil {
+		return err
+	}
+	size := 32
+	if simple {
+		size++
+	}
+	if count > r.Remaining()/size || count*size != r.Remaining() {
+		return fmt.Errorf("invalid movement sample count")
+	}
+	x, y, z, yaw := sess.posX, sess.posY, sess.posZ, sess.facing
+	for i := 0; i < count; i++ {
+		id, _ := r.U64()
+		var v [6]float32
+		for j := range v {
+			v[j], err = r.F32()
+			if err != nil || math.IsNaN(float64(v[j])) || math.IsInf(float64(v[j]), 0) {
+				return fmt.Errorf("invalid movement coordinate")
+			}
+		}
+		if simple {
+			_, _ = r.U8()
+		}
+		if id == sess.unitId {
+			x, y, z, yaw = v[0], v[1], v[2], v[4]
+		}
+	}
+	sess.posX, sess.posY, sess.posZ, sess.facing = x, y, z, yaw
+	return sess.ReturnEmptyOk(pkt.InvokeID, pkt.MethodID)
+}