feat(i18n): migrate hardcoded German strings to t() across 104 components/pages — AST-based batch with re-parse gate, 423 new de.json keys; tsc clean; vitest failures byte-identical to clean-tree baseline (pre-existing)

frontend/src/pages/ContactsList.tsx

@@ -537,13 +537,13 @@ export function ContactsListPage() {
                   {/* Placeholder for saved custom views */}
                   {savedViews.length === 0 ? (
                     <div className="px-2 py-3 text-center">
-                      <p className="text-[11px] text-secondary-400 mb-2">Keine benutzerdefinierten Ansichten</p>
+                      <p className="text-[11px] text-secondary-400 mb-2">{t('contactsList.keinebenutzerdefiniertenansichten')}</p>
                       <button
                         onClick={handleSaveView}
                         className="inline-flex items-center gap-1 px-2 py-1 text-[11px] text-primary-600 hover:bg-primary-50 rounded transition-colors"
                       >
                         <Plus className="w-3 h-3" />
-                        Aktuelle Ansicht speichern
+                        {t('contactsList.aktuelleansichtspeichern')}
                       </button>
                     </div>
                   ) : (
@@ -572,7 +572,7 @@ export function ContactsListPage() {
                         className="w-full flex items-center gap-1 px-2 py-1.5 rounded text-xs text-primary-600 hover:bg-primary-50 transition-colors"
                       >
                         <Plus className="w-3 h-3" />
-                        Aktuelle Ansicht speichern
+                        {t('contactsList.aktuelleansichtspeichern')}
                       </button>
                     </>
                   )}
@@ -756,7 +756,7 @@ export function ContactsListPage() {
 
       {/* Saved Filters Modal */}
       {savedFiltersOpen && (
-        <Modal open={savedFiltersOpen} onClose={() => setSavedFiltersOpen(false)} title="Gespeicherte Filter">
+        <Modal open={savedFiltersOpen} onClose={() => setSavedFiltersOpen(false)} title={t('contactsList.gespeichertefilter')}>
           <SavedFilters
             entityType="contacts"
             currentCriteria={{ search: debouncedSearch, type: contactType, sortBy, sortOrder, folderId }}