fix: handle empty data set using --format explore

Author: stainless-app[bot]

internal/jsonview/explorer.go

@@ -406,6 +406,10 @@ func (v *JSONViewer) navigateForward() (tea.Model, tea.Cmd) {
 		return v, nil
 	}
 
+	if len(tableView.rowData) < 1 {
+		return v, nil
+	}
+
 	cursor := tableView.table.Cursor()
 	selected := tableView.rowData[cursor]
 	if !v.canNavigateInto(selected) {

internal/jsonview/explorer_test.go

@@ -0,0 +1,37 @@
+package jsonview
+
+import (
+	"testing"
+
+	"github.com/charmbracelet/bubbles/help"
+	"github.com/tidwall/gjson"
+)
+
+func TestNavigateForward_EmptyRowData(t *testing.T) {
+	// An empty JSON array produces a TableView with no rows.
+	emptyArray := gjson.Parse("[]")
+	view, err := newTableView("", emptyArray, false)
+	if err != nil {
+		t.Fatalf("newTableView: %v", err)
+	}
+
+	viewer := &JSONViewer{
+		stack: []JSONView{view},
+		root:  "test",
+		help:  help.New(),
+	}
+
+	// Should return without panicking despite the empty data set.
+	model, cmd := viewer.navigateForward()
+	if model != viewer {
+		t.Error("expected same viewer model returned")
+	}
+	if cmd != nil {
+		t.Error("expected nil cmd")
+	}
+
+	// Stack should remain unchanged (no new view pushed).
+	if len(viewer.stack) != 1 {
+		t.Errorf("expected stack length 1, got %d", len(viewer.stack))
+	}
+}