feat(audit): free-text search, JSONL export of the view, labeled dev reset

- search field over flow/step/module/error/detail/project/id backs
  the list and the export ('current view' semantics); match logic
  is a top-level function with unit tests
- export writes one JSON object per line via the save dialog; the
  CLI stays the canonical WORM-grade export
- the bare trash icon on the audit toolbar read as 'delete
  evidence' (security-auditor finding) — the dev-only reset now
  sits in a labeled overflow menu next to the export action

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

lib/l10n/app_localizations_en.dart

@@ -1198,6 +1198,29 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get auditClearLogTooltip => 'Clear log (local/dev channels only)';
 
+  @override
+  String get auditMoreTooltip => 'More actions';
+
+  @override
+  String get auditSearchHint =>
+      'Search events (flow, step, module, error text …)';
+
+  @override
+  String get auditExportAction => 'Export current view as JSONL …';
+
+  @override
+  String get auditExportNothing =>
+      'No events in the current view — nothing to export.';
+
+  @override
+  String auditExportSaved(int n, String path) {
+    return 'Exported $n events to $path';
+  }
+
+  @override
+  String get auditDevResetAction =>
+      'Development reset: clear log … (local/dev only)';
+
   @override
   String auditClearedToast(int n, String channel) {
     return 'Cleared $n events on channel \"$channel\". Chain reseeded with marker.';