refactor(corecmd): rename package and finish ContractFinal leaf migration

Move cmdcore to corecmd, declare attendance ContractFinal in helpers, keep
Sheet destructive commands --yes-only, and align catalog/policy provenance.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/helpers/sheet_chart_coverage_more_test.go

@@ -3,6 +3,7 @@ package helpers
 import (
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
@@ -40,16 +41,18 @@ func TestCrossPlatformCoverageSheetChartCommandRemainingCoverage(t *testing.T) {
 	}
 
 	root := newChartCmd()
+	installExampleGlobalFlags(root)
 	deleteCmd := findCoverageSubcommand(t, root, "delete")
 	_ = deleteCmd.Flags().Set("node", "node")
 	_ = deleteCmd.Flags().Set("sheet-id", "sheet")
 	_ = deleteCmd.Flags().Set("chart-id", "chart")
-	oldArgs := os.Args
-	os.Args = []string{"dws", "--yes"}
+	_ = root.PersistentFlags().Set("yes", "true")
 	if err := deleteCmd.RunE(deleteCmd, nil); err != nil {
 		t.Fatalf("confirmed delete: %v", err)
 	}
-	os.Args = []string{"dws"}
+	_ = root.PersistentFlags().Set("yes", "false")
+	// Cancellation must exercise ConfirmSafety; a dry-run caller bypasses it.
+	installScriptedCaller(t, &scriptedToolCaller{})
 	noFile := filepath.Join(t.TempDir(), "no")
 	if err := os.WriteFile(noFile, []byte("no\n"), 0o600); err != nil {
 		t.Fatal(err)
@@ -60,12 +63,12 @@ func TestCrossPlatformCoverageSheetChartCommandRemainingCoverage(t *testing.T) {
 	}
 	oldStdin := os.Stdin
 	os.Stdin = stdin
+	deleteCmd.SetIn(stdin)
 	t.Cleanup(func() {
-		os.Args = oldArgs
 		os.Stdin = oldStdin
 		_ = stdin.Close()
 	})
-	if err := deleteCmd.RunE(deleteCmd, nil); err != nil {
-		t.Fatalf("cancelled delete: %v", err)
+	if err := deleteCmd.RunE(deleteCmd, nil); err == nil || !strings.Contains(err.Error(), "用户取消了操作") {
+		t.Fatalf("cancelled delete: error = %v, want 用户取消了操作", err)
 	}
 }