fix(store,audit,workspace): usertest low-findings tail (0.72.1)

- Store hero: 'TODAY' badge only for an operator-accepted story; the
  rotating compiled-in fallback deck now says 'FEATURED' (no false
  freshness claim). Policy as a top-level function with unit tests.
- Audit filter chips: standard label typography instead of mono —
  mono stays reserved for paths and identifiers.
- DE chain wording: 'Hash-Kette geprüft' as the one confirmation term
  (audit header now matches the doctor pill); 'intakt' stays the
  state headline. EN was already consistent.
- Workspace switcher: contrast bump for the sealed-area 'stopped'
  label.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_localizations_de.dart

@@ -957,6 +957,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get storeTodayBadge => 'HEUTE';
 
+  @override
+  String get storeFeaturedBadge => 'EMPFOHLEN';
+
   @override
   String get storeTodayDeck => 'Von der Ch∆In-Redaktion';
 
@@ -1275,7 +1278,7 @@ class AppLocalizationsDe extends AppLocalizations {
   }
 
   @override
-  String get auditHashChainVerified => 'Hash-Kette verifiziert';
+  String get auditHashChainVerified => 'Hash-Kette geprüft';
 
   @override
   String get auditDetailHeader => 'DETAIL';