feat: implement remove command with sequential removals

tests/contract/remove_command_preview_test.go

@@ -0,0 +1,46 @@
+package contract
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	renamercmd "github.com/rogeecn/renamer/cmd"
+)
+
+func TestRemoveCommandDryRunPreview(t *testing.T) {
+	tmp := t.TempDir()
+	createRemoveFile(t, filepath.Join(tmp, "report copy draft.txt"))
+	createRemoveFile(t, filepath.Join(tmp, "notes draft.txt"))
+
+	root := renamercmd.NewRootCommand()
+	var out bytes.Buffer
+	root.SetOut(&out)
+	root.SetErr(&out)
+	root.SetArgs([]string{"remove", " copy", " draft", "--path", tmp, "--dry-run"})
+
+	if err := root.Execute(); err != nil {
+		t.Fatalf("remove command returned error: %v (output: %s)", err, out.String())
+	}
+
+	output := out.String()
+	if !strings.Contains(output, "report copy draft.txt -> report.txt") {
+		t.Fatalf("expected preview mapping in output, got: %s", output)
+	}
+
+	if !strings.Contains(output, "Preview complete") {
+		t.Fatalf("expected dry-run completion message, got: %s", output)
+	}
+}
+
+func createRemoveFile(t *testing.T, path string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		t.Fatalf("mkdir %s: %v", path, err)
+	}
+	if err := os.WriteFile(path, []byte("x"), 0o644); err != nil {
+		t.Fatalf("write file %s: %v", path, err)
+	}
+}