fix(web): remove deleted multi-inbound client from runtime regardless of shared email (#5543)

DelInboundClientByEmail gated the runtime RemoveUser/DeleteUser (and its
push-plan resolution) on !emailShared. But Xray users are keyed by inbound
tag + email, so a client attached to two inbounds left its user live in the
running Xray of every inbound where the email was still shared by a sibling
inbound, until an Xray restart.

Decouple the per-inbound runtime removal from emailShared; keep emailShared
only for preserving the shared email-keyed client_traffics/IP rows.

internal/web/service/del_shared_email_runtime_test.go

@@ -0,0 +1,34 @@
+package service
+
+import (
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/mhsanaei/3x-ui/v3/internal/database/model"
+)
+
+// Deleting a client that is attached to more than one inbound must still remove
+// the user from the running runtime of the inbound being deleted from. The
+// runtime user is keyed by inbound tag, so a sibling inbound still carrying the
+// same email (emailShared) must not suppress the per-inbound runtime removal —
+// otherwise the deleted user keeps connecting on that inbound until Xray
+// restart (#5543).
+func TestDelInboundClientByEmail_SharedEmailStillRemovesFromRuntime(t *testing.T) {
+	setupBulkDB(t)
+	nodeID, fake := setupNodeRuntime(t)
+
+	shared := []model.Client{{ID: uuid.NewString(), Email: "shared@x", Enable: true}}
+	ibA := nodeInbound(t, nodeID, 31001, shared)
+	nodeInbound(t, nodeID, 31002, shared)
+
+	svc := &ClientService{}
+	inboundSvc := &InboundService{}
+
+	if _, err := svc.DelInboundClientByEmail(inboundSvc, ibA.Id, "shared@x", false); err != nil {
+		t.Fatalf("DelInboundClientByEmail: %v", err)
+	}
+
+	if got := fake.deleteUser.Load(); got != 1 {
+		t.Fatalf("shared-email delete dispatched %d DeleteUser RPCs, want 1 (must remove from the deleted inbound's runtime despite the sibling inbound) (#5543)", got)
+	}
+}