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_en.arb

@@ -579,6 +579,13 @@
   "auditFilterModule": "module",
   "auditFilterTooltip": "Filter events",
   "auditClearLogTooltip": "Clear log (local/dev channels only)",
+  "auditMoreTooltip": "More actions",
+  "auditSearchHint": "Search events (flow, step, module, error text …)",
+  "auditExportAction": "Export current view as JSONL …",
+  "auditExportNothing": "No events in the current view — nothing to export.",
+  "auditExportSaved": "Exported {n} events to {path}",
+  "@auditExportSaved": {"placeholders": {"n": {"type": "int"}, "path": {"type": "String"}}},
+  "auditDevResetAction": "Development reset: clear log … (local/dev only)",
   "auditClearedToast": "Cleared {n} events on channel \"{channel}\". Chain reseeded with marker.",
   "@auditClearedToast": {
     "placeholders": {