Rename unspecified coverage table title

tests/test_report_weasy_pdf.py

@@ -13,7 +13,9 @@ from pve_backup_report.models import (
     ReportData,
     ReportSummary,
 )
+from pve_backup_report.i18n import Translator
 from pve_backup_report.report_weasy_pdf import build_template_context
+from pve_backup_report.report_weasy_pdf import coverage_section_title
 from pve_backup_report.report_weasy_pdf import render_html
 
 
@@ -235,6 +237,11 @@ def test_render_html_keeps_css_unescaped() -> None:
     assert '<h1 class="section-group-title">Retention des sauvegardes VM/CT</h1>' not in html
 
 
+def test_coverage_section_title_renames_unspecified_namespace() -> None:
+    assert coverage_section_title("non renseigne", Translator("fr")) == "VM/CT non sauvegardée"
+    assert coverage_section_title("serveurs", Translator("fr")) == "Sauvegarde des VM/CT - serveurs"
+
+
 def test_render_html_supports_english_labels() -> None:
     report_data = ReportData(
         coverage=[