B5: update stats plumbing test to the corrected registration contract

internal/web/service/traffic_stats_switches_test.go

@@ -14,9 +14,13 @@ import (
 // UpdateAllSetting under the settings.trafficStatsSwitches key) is the
 // same value the sing-box generator consumes
 // (SingboxService.GetTrafficStatsSwitches), and the generated agent
-// config's experimental/v2ray_api stats block follows the B2 category
-// gates (a category appears only when both of its direction switches
-// are on; all four off → no experimental block at all).
+// config carries an experimental/v2ray_api stats block whenever at
+// least one category gate is on (both direction switches; all four
+// off → no experimental block at all). Since the ITEM6 B5 fix, the
+// block always lists inbounds, users and outbounds together — the
+// core registers no counters otherwise — and the per-category
+// counting policy is enforced by the master at recording time, not
+// by omission here.
 func TestTrafficStatsSwitchesPlumbing(t *testing.T) {
 	dbDir := t.TempDir()
 	if err := database.InitDB(filepath.Join(dbDir, "x-ui.db")); err != nil {
@@ -82,8 +86,8 @@ func TestTrafficStatsSwitchesPlumbing(t *testing.T) {
 	}
 	if stats := statsOf(gen()); stats == nil || stats["inbounds"] == nil {
 		t.Errorf("default: stats.inbounds missing")
-	} else if _, ok := stats["outbounds"]; ok {
-		t.Errorf("default: stats.outbounds generated although outbound switches are off")
+	} else if _, ok := stats["outbounds"]; !ok {
+		t.Errorf("default: stats.outbounds must accompany the block (core registers no counters without all three lists)")
 	}
 
 	// All four off: read path returns the saved string verbatim, the
@@ -105,16 +109,17 @@ func TestTrafficStatsSwitchesPlumbing(t *testing.T) {
 		t.Errorf("all-off: experimental block generated anyway: %v", cfg["experimental"])
 	}
 
-	// Inbound half-on (uplink only) closes the inbound category;
-	// outbound both-on opens the outbound category.
+	// Inbound half-on (uplink only) closes the inbound category gate;
+	// outbound both-on opens its gate. Either gate on → the block is
+	// generated with all three lists (registration requirement).
 	mixed := `{"inboundUplink":true,"inboundDownlink":false,"outboundUplink":true,"outboundDownlink":true}`
 	save(mixed)
 	stats := statsOf(gen())
 	if stats == nil {
 		t.Fatalf("mixed: no stats block although outbound category is on")
 	}
-	if _, ok := stats["inbounds"]; ok {
-		t.Errorf("mixed: inbound half-on still generated stats.inbounds")
+	if _, ok := stats["inbounds"]; !ok {
+		t.Errorf("mixed: stats.inbounds must accompany the block (registration requirement; recording gate enforces the policy)")
 	}
 	if _, ok := stats["outbounds"]; !ok {
 		t.Errorf("mixed: outbound both-on did not generate stats.outbounds")