P8(2): inbound node reassignment (move) with backend re-homing

An inbound's 部署到 node can now be changed after creation; the row,
clients, client_traffics and subscription output stay untouched (same
inbound id throughout).

Contract: the update payload's nodeId counts only when the key was
explicitly sent — the controller probes the raw JSON body and sets
Inbound.NodeIDProvided; the wire adapter now always emits nodeId (null =
local) so clearing the picker is an explicit move-to-local, while
callers that omit nodeId keep the stored assignment (legacy behaviour).

UpdateInbound resolves the target before the port-conflict check (so
conflicts are scoped to the target node), rejects moves to a missing
node, re-derives auto tags under the target node's prefix, validates
the tag against the target node's namespace, and marks BOTH nodes
dirty: the source node's next reconcile sweeps the old tag (no silent
ghost — the flag persists until a reconcile succeeds, so an offline
side just defers), the target's pushes the inbound. Agent-bound nodes
converge via GetXrayConfigForAgent on the agent's next config poll.
A local side has no reconcile loop, so it is applied directly
post-commit (Del/Add on the local runtime, restart fallback).

Frontend: the deploy-to Select is no longer disabled in edit mode
(protocol stays locked); candidate rules unchanged (online nodes only).

Tests: panel->panel move with reconcile sweep/push assertions,
auto-tag prefix regeneration, agent-config flip in both directions,
omitted-nodeId legacy contract, same-node no-op, missing-node
rejection, node->local move.

internal/web/controller/inbound.go

@@ -1,7 +1,9 @@
 package controller
 
 import (
+	"bytes"
 	"encoding/json"
+	"io"
 	"net"
 	"strconv"
 	"strings"
@@ -222,6 +224,27 @@ func (a *InboundController) bulkDelInbounds(c *gin.Context) {
 	notifyClientsChanged()
 }
 
+// requestHasJSONKey reports whether the request body is a JSON object that
+// explicitly carries key — present with a null value counts. The body is
+// restored so the normal bind can read it again. Non-JSON bodies (form
+// posts) report false for every key.
+func requestHasJSONKey(c *gin.Context, key string) bool {
+	if c.Request == nil || c.Request.Body == nil {
+		return false
+	}
+	body, err := io.ReadAll(c.Request.Body)
+	if err != nil || len(body) == 0 {
+		return false
+	}
+	c.Request.Body = io.NopCloser(bytes.NewReader(body))
+	var probe map[string]json.RawMessage
+	if json.Unmarshal(body, &probe) != nil {
+		return false
+	}
+	_, ok := probe[key]
+	return ok
+}
+
 // updateInbound updates an existing inbound configuration.
 func (a *InboundController) updateInbound(c *gin.Context) {
 	id, err := strconv.Atoi(c.Param("id"))
@@ -232,13 +255,16 @@ func (a *InboundController) updateInbound(c *gin.Context) {
 	inbound := &model.Inbound{
 		Id: id,
 	}
+	// An explicitly sent nodeId (even null) is a (re)assignment request —
+	// UpdateInbound migrates the inbound when it differs from the stored
+	// assignment. An omitted nodeId keeps the stored assignment, so detect
+	// the key's presence on the raw body before binding consumes it.
+	nodeIDProvided := requestHasJSONKey(c, "nodeId")
 	if !middleware.BindAndValidateInto(c, inbound) {
 		return
 	}
-	// Same NodeID=0 → nil normalisation as addInbound. UpdateInbound
-	// loads the existing row's NodeID from DB anyway (Phase 1 doesn't
-	// support migrating an inbound between nodes), but normalising here
-	// keeps the wire shape consistent.
+	inbound.NodeIDProvided = nodeIDProvided
+	// Same NodeID=0 → nil normalisation as addInbound.
 	if inbound.NodeID != nil && *inbound.NodeID == 0 {
 		inbound.NodeID = nil
 	}

internal/web/service/inbound.go

@@ -1494,9 +1494,26 @@ func (s *InboundService) UpdateInbound(inbound *model.Inbound) (*model.Inbound,
 	if err != nil {
 		return inbound, false, err
 	}
-	// Restore the stored NodeID before the port-conflict check so a node inbound
-	// stays scoped to its own node (the payload's nodeId is unreliable, often absent).
-	inbound.NodeID = oldInbound.NodeID
+	// Resolve the assignment target before the port-conflict check so the
+	// inbound is scoped to the node it will live on. The payload's nodeId
+	// only counts when it was explicitly sent (NodeIDProvided): callers
+	// often omit it, and an omission must keep the stored assignment rather
+	// than yank the inbound back to the local panel. An explicit nodeId
+	// that differs from the stored one is a move — the transaction below
+	// re-homes the inbound (both nodes marked dirty, local side applied
+	// directly) without touching its id, clients or traffic rows.
+	storedNodeID := oldInbound.NodeID
+	targetNodeID := storedNodeID
+	if inbound.NodeIDProvided {
+		targetNodeID = inbound.NodeID
+	}
+	nodeChanged := !sameNode(storedNodeID, targetNodeID)
+	if nodeChanged && targetNodeID != nil {
+		if _, err := (&NodeService{}).GetById(*targetNodeID); err != nil {
+			return inbound, false, common.NewErrorf("cannot move inbound to node %d: node not found", *targetNodeID)
+		}
+	}
+	inbound.NodeID = targetNodeID
 	if inbound.NodeID != nil && !isNodeEligibleProtocol(inbound.Protocol) {
 		return inbound, false, common.NewErrorf("%s inbounds cannot be assigned to a node", inbound.Protocol)
 	}
@@ -1505,6 +1522,7 @@ func (s *InboundService) UpdateInbound(inbound *model.Inbound) (*model.Inbound,
 	// overwritten with the new values further down, then ensure a routed
 	// inbound keeps a stable egress port (reusing the one already stored).
 	oldProtocol := oldInbound.Protocol
+	oldEnable := oldInbound.Enable
 	oldRoutedMtproto := mtprotoRoutesThroughXray(oldInbound)
 	if err := s.normalizeMtprotoXrayPort(inbound, oldInbound.Settings); err != nil {
 		return inbound, false, err
@@ -1645,7 +1663,71 @@ func (s *InboundService) UpdateInbound(inbound *model.Inbound) (*model.Inbound,
 		oldInbound.Tag = resolvedTag
 		inbound.Tag = oldInbound.Tag
 
-		if oldInbound.NodeID == nil {
+		// Persist the resolved assignment with the rest of the row. From
+		// here on oldInbound.NodeID holds the target; the branch below keys
+		// the move handling off nodeChanged, not off the stored value.
+		oldInbound.NodeID = targetNodeID
+		if nodeChanged {
+			// Move: validate the resolved tag against the target node's
+			// namespace, exactly like a same-node edit does for its node.
+			if targetNodeID != nil {
+				if err := (&NodeService{}).EnsureInboundTagAllowedTx(tx, *targetNodeID, oldInbound.Tag); err != nil {
+					return err
+				}
+			}
+			// Node sides converge through the dirty marks written at the
+			// end of this transaction (source + target): the source node's
+			// next reconcile sweeps the inbound's old tag, the target's
+			// pushes the inbound — the same backstop DelInbound relies on,
+			// so an unreachable side defers (pending) instead of silently
+			// stranding a ghost. A local side has no reconcile loop, so it
+			// is applied directly post-commit like a normal local edit.
+			if storedNodeID == nil || targetNodeID == nil {
+				probe := *oldInbound
+				probe.NodeID = nil
+				rt, push, _, perr := s.nodePushPlan(&probe)
+				if perr != nil {
+					return perr
+				}
+				if !push {
+					needRestart = true
+				} else {
+					var runtimeInbound *model.Inbound
+					if targetNodeID == nil && inbound.Enable {
+						built, bErr := s.buildInboundForLocalRuntime(tx, oldInbound)
+						if bErr != nil {
+							logger.Debug("Unable to prepare runtime inbound config:", bErr)
+							needRestart = true
+						} else {
+							runtimeInbound = built
+						}
+					}
+					oldSnapshot := *oldInbound
+					oldSnapshot.Tag = tag
+					oldSnapshot.NodeID = storedNodeID
+					removeFromLocal := storedNodeID == nil && oldEnable
+					postCommitApply = func() {
+						if removeFromLocal {
+							if err2 := rt.DelInbound(context.Background(), &oldSnapshot); err2 == nil {
+								logger.Debug("Moved inbound deleted on", rt.Name(), ":", tag)
+							} else {
+								logger.Debug("Unable to delete moved inbound on", rt.Name(), ":", err2)
+								needRestart = true
+							}
+						}
+						if runtimeInbound == nil {
+							return
+						}
+						if err2 := rt.AddInbound(context.Background(), runtimeInbound); err2 == nil {
+							logger.Debug("Moved inbound added on", rt.Name(), ":", oldInbound.Tag)
+						} else {
+							logger.Debug("Unable to add moved inbound on", rt.Name(), ":", err2)
+							needRestart = true
+						}
+					}
+				}
+			}
+		} else if oldInbound.NodeID == nil {
 			rt, push, _, perr := s.nodePushPlan(oldInbound)
 			if perr != nil {
 				return perr
@@ -1728,6 +1810,15 @@ func (s *InboundService) UpdateInbound(inbound *model.Inbound) (*model.Inbound,
 				return err
 			}
 		}
+		if nodeChanged && storedNodeID != nil {
+			// The source node must reconcile too: its sweep is what removes
+			// the moved inbound's old tag from that node. The flag stays set
+			// until a reconcile succeeds, so an offline source defers the
+			// cleanup instead of dropping it.
+			if err := (&NodeService{}).MarkNodeDirtyTx(tx, *storedNodeID); err != nil {
+				return err
+			}
+		}
 		// (Re)generate the Xray config whenever routing was or is now enabled, so
 		// the egress SOCKS bridge is added, moved, or dropped to match the new
 		// settings.

internal/web/service/inbound_node_move_test.go

@@ -0,0 +1,432 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"testing"
+
+	"github.com/mhsanaei/3x-ui/v3/internal/database"
+	"github.com/mhsanaei/3x-ui/v3/internal/database/model"
+	"github.com/mhsanaei/3x-ui/v3/internal/web/runtime"
+	"github.com/mhsanaei/3x-ui/v3/internal/xray"
+)
+
+// statefulFakePanel is a node panel double with real state: added inbounds
+// appear in its list, deleted ones disappear. It records every mutation so
+// move tests can assert what reconcile actually pushed where.
+type statefulFakePanel struct {
+	mu      sync.Mutex
+	byTag   map[string]int
+	byID    map[int]string
+	nextID  int
+	added   []string
+	updated []int
+	deleted []int
+}
+
+func newStatefulFakePanel(t *testing.T, seed map[string]int) (*httptest.Server, *statefulFakePanel) {
+	t.Helper()
+	p := &statefulFakePanel{byTag: map[string]int{}, byID: map[int]string{}, nextID: 1000}
+	for tag, id := range seed {
+		p.byTag[tag] = id
+		p.byID[id] = tag
+	}
+	writeOK := func(w http.ResponseWriter, obj any) {
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]any{"success": true, "msg": "", "obj": obj})
+	}
+	mux := http.NewServeMux()
+	mux.HandleFunc("/panel/api/inbounds/list", func(w http.ResponseWriter, _ *http.Request) {
+		type row struct {
+			Id       int    `json:"id"`
+			Tag      string `json:"tag"`
+			Port     int    `json:"port"`
+			Protocol string `json:"protocol"`
+			Listen   string `json:"listen"`
+		}
+		p.mu.Lock()
+		rows := make([]row, 0, len(p.byTag))
+		for tag, id := range p.byTag {
+			rows = append(rows, row{Id: id, Tag: tag})
+		}
+		p.mu.Unlock()
+		writeOK(w, rows)
+	})
+	mux.HandleFunc("/panel/api/inbounds/add", func(w http.ResponseWriter, r *http.Request) {
+		if err := r.ParseForm(); err != nil {
+			http.Error(w, "bad form", http.StatusBadRequest)
+			return
+		}
+		tag := r.Form.Get("tag")
+		p.mu.Lock()
+		p.nextID++
+		id := p.nextID
+		p.byTag[tag] = id
+		p.byID[id] = tag
+		p.added = append(p.added, tag)
+		p.mu.Unlock()
+		writeOK(w, map[string]any{"id": id, "tag": tag})
+	})
+	mux.HandleFunc("/panel/api/inbounds/update/", func(w http.ResponseWriter, r *http.Request) {
+		id, err := strconv.Atoi(strings.TrimPrefix(r.URL.Path, "/panel/api/inbounds/update/"))
+		if err != nil {
+			http.Error(w, "bad id", http.StatusBadRequest)
+			return
+		}
+		p.mu.Lock()
+		p.updated = append(p.updated, id)
+		p.mu.Unlock()
+		writeOK(w, nil)
+	})
+	mux.HandleFunc("/panel/api/inbounds/del/", func(w http.ResponseWriter, r *http.Request) {
+		id, err := strconv.Atoi(strings.TrimPrefix(r.URL.Path, "/panel/api/inbounds/del/"))
+		if err != nil {
+			http.Error(w, "bad id", http.StatusBadRequest)
+			return
+		}
+		p.mu.Lock()
+		if tag, ok := p.byID[id]; ok {
+			delete(p.byID, id)
+			delete(p.byTag, tag)
+		}
+		p.deleted = append(p.deleted, id)
+		p.mu.Unlock()
+		writeOK(w, nil)
+	})
+	ts := httptest.NewServer(mux)
+	t.Cleanup(ts.Close)
+	return ts, p
+}
+
+func (p *statefulFakePanel) tags() []string {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	out := make([]string, 0, len(p.byTag))
+	for tag := range p.byTag {
+		out = append(out, tag)
+	}
+	sort.Strings(out)
+	return out
+}
+
+func (p *statefulFakePanel) addedTags() []string {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return append([]string(nil), p.added...)
+}
+
+func (p *statefulFakePanel) deletedIDs() []int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return append([]int(nil), p.deleted...)
+}
+
+const moveTestSettings = `{"clients":[{"id":"11111111-2222-3333-4444-555555555555","email":"mv@example.com","enable":true}]}`
+
+func seedMoveInbound(t *testing.T, tag string, port int, nodeID *int) model.Inbound {
+	t.Helper()
+	seedInboundConflictNode(t, tag, "", port, model.VLESS, `{"network":"tcp"}`, moveTestSettings, nodeID)
+	var ib model.Inbound
+	if err := database.GetDB().Where("tag = ?", tag).First(&ib).Error; err != nil {
+		t.Fatalf("read seeded inbound: %v", err)
+	}
+	ct := &xray.ClientTraffic{InboundId: ib.Id, Enable: true, Email: "mv@example.com", Up: 111, Down: 222}
+	if err := database.GetDB().Create(ct).Error; err != nil {
+		t.Fatalf("seed client traffic: %v", err)
+	}
+	return ib
+}
+
+func reloadInbound(t *testing.T, id int) model.Inbound {
+	t.Helper()
+	var ib model.Inbound
+	if err := database.GetDB().First(&ib, id).Error; err != nil {
+		t.Fatalf("reload inbound %d: %v", id, err)
+	}
+	return ib
+}
+
+func nodeDirty(t *testing.T, id int) bool {
+	t.Helper()
+	var n model.Node
+	if err := database.GetDB().First(&n, id).Error; err != nil {
+		t.Fatalf("reload node %d: %v", id, err)
+	}
+	return n.ConfigDirty
+}
+
+func clientTrafficTotals(t *testing.T, email string) (int64, int64) {
+	t.Helper()
+	var ct xray.ClientTraffic
+	if err := database.GetDB().Where("email = ?", email).First(&ct).Error; err != nil {
+		t.Fatalf("read client traffic: %v", err)
+	}
+	return ct.Up, ct.Down
+}
+
+// The headline move: panel node → panel node. The row keeps its id, clients
+// and traffic; both nodes are marked dirty; reconcile then deletes the
+// inbound from the source panel and pushes it to the target panel.
+func TestUpdateInbound_MoveBetweenPanelNodes(t *testing.T) {
+	setupConflictDB(t)
+
+	tsA, panelA := newStatefulFakePanel(t, map[string]int{"movable": 11})
+	tsB, panelB := newStatefulFakePanel(t, nil)
+	nodeA := reconcileTestNode(t, tsA, "move-a", "all", nil)
+	nodeB := reconcileTestNode(t, tsB, "move-b", "all", nil)
+
+	seeded := seedMoveInbound(t, "movable", 2443, &nodeA.Id)
+
+	svc := &InboundService{}
+	update := seeded
+	update.NodeID = &nodeB.Id
+	update.NodeIDProvided = true
+	if _, _, err := svc.UpdateInbound(&update); err != nil {
+		t.Fatalf("UpdateInbound move: %v", err)
+	}
+
+	after := reloadInbound(t, seeded.Id)
+	if after.NodeID == nil || *after.NodeID != nodeB.Id {
+		t.Fatalf("node_id after move = %v, want %d", after.NodeID, nodeB.Id)
+	}
+	if after.Tag != "movable" {
+		t.Fatalf("custom tag changed across move: %q", after.Tag)
+	}
+	if !nodeDirty(t, nodeA.Id) || !nodeDirty(t, nodeB.Id) {
+		t.Fatalf("both nodes must be dirty after a move (A=%v B=%v)", nodeDirty(t, nodeA.Id), nodeDirty(t, nodeB.Id))
+	}
+	if up, down := clientTrafficTotals(t, "mv@example.com"); up != 111 || down != 222 {
+		t.Fatalf("client traffic changed across move: up=%d down=%d, want 111/222", up, down)
+	}
+
+	// Reconcile the source: the moved inbound must be swept from panel A.
+	if err := svc.ReconcileNode(context.Background(), runtime.NewRemote(nodeA, nil), nodeA); err != nil {
+		t.Fatalf("ReconcileNode source: %v", err)
+	}
+	if got := panelA.deletedIDs(); len(got) != 1 || got[0] != 11 {
+		t.Fatalf("source panel deletions = %v, want [11]", got)
+	}
+	if tags := panelA.tags(); len(tags) != 0 {
+		t.Fatalf("source panel still holds tags %v after reconcile", tags)
+	}
+
+	// Reconcile the target: the inbound must be pushed to panel B.
+	if err := svc.ReconcileNode(context.Background(), runtime.NewRemote(nodeB, nil), nodeB); err != nil {
+		t.Fatalf("ReconcileNode target: %v", err)
+	}
+	if got := panelB.addedTags(); len(got) != 1 || got[0] != "movable" {
+		t.Fatalf("target panel additions = %v, want [movable]", got)
+	}
+	if tags := panelB.tags(); len(tags) != 1 || tags[0] != "movable" {
+		t.Fatalf("target panel tags = %v, want [movable]", tags)
+	}
+}
+
+// An auto-generated tag carries the node prefix: a move re-derives it under
+// the target node's prefix (the row — and its clients — stay the same).
+func TestUpdateInbound_MoveRegeneratesAutoTagPrefix(t *testing.T) {
+	setupConflictDB(t)
+
+	tsA, _ := newStatefulFakePanel(t, nil)
+	tsB, _ := newStatefulFakePanel(t, nil)
+	nodeA := reconcileTestNode(t, tsA, "tag-a", "all", nil)
+	nodeB := reconcileTestNode(t, tsB, "tag-b", "all", nil)
+
+	oldTag := fmt.Sprintf("n%d-in-2444-tcp", nodeA.Id)
+	seeded := seedMoveInbound(t, oldTag, 2444, &nodeA.Id)
+
+	svc := &InboundService{}
+	update := seeded
+	update.NodeID = &nodeB.Id
+	update.NodeIDProvided = true
+	if _, _, err := svc.UpdateInbound(&update); err != nil {
+		t.Fatalf("UpdateInbound move: %v", err)
+	}
+	after := reloadInbound(t, seeded.Id)
+	want := fmt.Sprintf("n%d-in-2444-tcp", nodeB.Id)
+	if after.Tag != want {
+		t.Fatalf("auto tag after move = %q, want %q", after.Tag, want)
+	}
+}
+
+// Agent-bound nodes take their whole config from GetXrayConfigForAgent, so a
+// move must flip which node's generated config carries the inbound — in
+// both directions (agent → panel as well as panel → agent).
+func TestUpdateInbound_MoveFlipsAgentConfig(t *testing.T) {
+	setupConflictDB(t)
+
+	tsA, _ := newStatefulFakePanel(t, nil)
+	nodePanel := reconcileTestNode(t, tsA, "cfg-panel", "all", nil)
+	agentNode := &model.Node{Name: "cfg-agent", Enable: true, Status: "online", InboundsAdoptedAt: 1}
+	if err := database.GetDB().Create(agentNode).Error; err != nil {
+		t.Fatalf("create agent node row: %v", err)
+	}
+
+	agentHasTag := func() bool {
+		cfg, err := (&XrayService{}).GetXrayConfigForAgent(agentNode.Id, "", "")
+		if err != nil {
+			t.Fatalf("GetXrayConfigForAgent: %v", err)
+		}
+		raw, err := json.Marshal(cfg)
+		if err != nil {
+			t.Fatalf("marshal agent config: %v", err)
+		}
+		return strings.Contains(string(raw), `"movable"`)
+	}
+
+	seeded := seedMoveInbound(t, "movable", 2445, &agentNode.Id)
+	if !agentHasTag() {
+		t.Fatal("agent config should contain the inbound before the move")
+	}
+
+	svc := &InboundService{}
+	// agent → panel
+	update := seeded
+	update.NodeID = &nodePanel.Id
+	update.NodeIDProvided = true
+	if _, _, err := svc.UpdateInbound(&update); err != nil {
+		t.Fatalf("UpdateInbound agent->panel: %v", err)
+	}
+	if agentHasTag() {
+		t.Fatal("agent config still contains the inbound after agent->panel move")
+	}
+	if !nodeDirty(t, agentNode.Id) || !nodeDirty(t, nodePanel.Id) {
+		t.Fatal("both nodes must be dirty after agent->panel move")
+	}
+
+	// panel → agent (fresh read so the payload matches the stored row)
+	current := reloadInbound(t, seeded.Id)
+	current.NodeID = &agentNode.Id
+	current.NodeIDProvided = true
+	if _, _, err := svc.UpdateInbound(&current); err != nil {
+		t.Fatalf("UpdateInbound panel->agent: %v", err)
+	}
+	if !agentHasTag() {
+		t.Fatal("agent config should contain the inbound after panel->agent move")
+	}
+	if up, down := clientTrafficTotals(t, "mv@example.com"); up != 111 || down != 222 {
+		t.Fatalf("client traffic changed across moves: up=%d down=%d, want 111/222", up, down)
+	}
+}
+
+// Without NodeIDProvided the payload's nodeId is ignored entirely — both an
+// omission (nil) and a stray different value keep the stored assignment.
+// This is the legacy contract every non-form caller relies on.
+func TestUpdateInbound_OmittedNodeIdKeepsAssignment(t *testing.T) {
+	setupConflictDB(t)
+
+	nodeA := &model.Node{Name: "keep-a", Enable: true, Status: "online", InboundsAdoptedAt: 1}
+	nodeB := &model.Node{Name: "keep-b", Enable: true, Status: "online", InboundsAdoptedAt: 1}
+	if err := database.GetDB().Create(nodeA).Error; err != nil {
+		t.Fatalf("create node A: %v", err)
+	}
+	if err := database.GetDB().Create(nodeB).Error; err != nil {
+		t.Fatalf("create node B: %v", err)
+	}
+	seeded := seedMoveInbound(t, "movable", 2446, &nodeA.Id)
+
+	svc := &InboundService{}
+	omitted := seeded
+	omitted.NodeID = nil
+	if _, _, err := svc.UpdateInbound(&omitted); err != nil {
+		t.Fatalf("UpdateInbound omitted nodeId: %v", err)
+	}
+	if after := reloadInbound(t, seeded.Id); after.NodeID == nil || *after.NodeID != nodeA.Id {
+		t.Fatalf("omitted nodeId moved the inbound: node_id=%v", after.NodeID)
+	}
+
+	stray := reloadInbound(t, seeded.Id)
+	stray.NodeID = &nodeB.Id // payload value without the provided flag
+	if _, _, err := svc.UpdateInbound(&stray); err != nil {
+		t.Fatalf("UpdateInbound stray nodeId: %v", err)
+	}
+	if after := reloadInbound(t, seeded.Id); after.NodeID == nil || *after.NodeID != nodeA.Id {
+		t.Fatalf("unflagged nodeId moved the inbound: node_id=%v", after.NodeID)
+	}
+}
+
+// An explicit nodeId equal to the stored one is a plain edit, not a move.
+func TestUpdateInbound_ExplicitSameNodeIsPlainEdit(t *testing.T) {
+	setupConflictDB(t)
+
+	nodeA := &model.Node{Name: "same-a", Enable: true, Status: "online", InboundsAdoptedAt: 1}
+	if err := database.GetDB().Create(nodeA).Error; err != nil {
+		t.Fatalf("create node: %v", err)
+	}
+	seeded := seedMoveInbound(t, "movable", 2447, &nodeA.Id)
+
+	svc := &InboundService{}
+	update := seeded
+	update.NodeIDProvided = true
+	update.Remark = "edited"
+	if _, _, err := svc.UpdateInbound(&update); err != nil {
+		t.Fatalf("UpdateInbound same-node edit: %v", err)
+	}
+	after := reloadInbound(t, seeded.Id)
+	if after.NodeID == nil || *after.NodeID != nodeA.Id || after.Remark != "edited" {
+		t.Fatalf("same-node edit misapplied: node=%v remark=%q", after.NodeID, after.Remark)
+	}
+}
+
+// An explicit move to a node that does not exist is rejected and the row is
+// left untouched.
+func TestUpdateInbound_MoveToMissingNodeRejected(t *testing.T) {
+	setupConflictDB(t)
+
+	nodeA := &model.Node{Name: "miss-a", Enable: true, Status: "online", InboundsAdoptedAt: 1}
+	if err := database.GetDB().Create(nodeA).Error; err != nil {
+		t.Fatalf("create node: %v", err)
+	}
+	seeded := seedMoveInbound(t, "movable", 2448, &nodeA.Id)
+
+	svc := &InboundService{}
+	update := seeded
+	missing := 99999
+	update.NodeID = &missing
+	update.NodeIDProvided = true
+	if _, _, err := svc.UpdateInbound(&update); err == nil {
+		t.Fatal("move to a missing node must be rejected")
+	}
+	after := reloadInbound(t, seeded.Id)
+	if after.NodeID == nil || *after.NodeID != nodeA.Id {
+		t.Fatalf("rejected move changed the row: node_id=%v", after.NodeID)
+	}
+}
+
+// An explicit null nodeId moves the inbound back to the local panel: the row
+// becomes local and the source node is marked dirty so its next reconcile
+// sweeps the inbound there.
+func TestUpdateInbound_MoveNodeToLocal(t *testing.T) {
+	setupConflictDB(t)
+
+	nodeA := &model.Node{Name: "loc-a", Enable: true, Status: "online", InboundsAdoptedAt: 1}
+	if err := database.GetDB().Create(nodeA).Error; err != nil {
+		t.Fatalf("create node: %v", err)
+	}
+	seeded := seedMoveInbound(t, "movable", 2449, &nodeA.Id)
+
+	svc := &InboundService{}
+	update := seeded
+	update.NodeID = nil
+	update.NodeIDProvided = true
+	if _, _, err := svc.UpdateInbound(&update); err != nil {
+		t.Fatalf("UpdateInbound node->local: %v", err)
+	}
+	after := reloadInbound(t, seeded.Id)
+	if after.NodeID != nil {
+		t.Fatalf("node_id after move to local = %v, want nil", *after.NodeID)
+	}
+	if !nodeDirty(t, nodeA.Id) {
+		t.Fatal("source node must be dirty after a move to local (sweep pending)")
+	}
+	if up, down := clientTrafficTotals(t, "mv@example.com"); up != 111 || down != 222 {
+		t.Fatalf("client traffic changed across move to local: up=%d down=%d", up, down)
+	}
+}