feat(audit): full-history JSONL export in the actions menu

The menu so far only exported the current view (type + search
filter over the page 100-event window). A second action now fetches
the complete event history of the active project scope in one
EventLog call (the RPC has no cursor and no server-side cap) and
writes it as JSONL. Serialisation extracted to a top-level function
with unit tests; a stale comment advertising the never-shipped
"chain audit export" command now names "chain admin events --json".
Studio 0.73.0.

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

lib/l10n/app_de.arb

@@ -569,6 +569,8 @@
   "auditMoreTooltip": "Weitere Aktionen",
   "auditSearchHint": "Ereignisse durchsuchen (Flow, Schritt, Modul, Fehlertext …)",
   "auditExportAction": "Aktuelle Ansicht als JSONL exportieren …",
+  "auditExportAllAction": "Vollständiges Protokoll als JSONL exportieren …",
+  "auditExportAllNothing": "Das Protokoll ist leer — nichts zu exportieren.",
   "auditExportNothing": "Keine Ereignisse in der aktuellen Ansicht — nichts zu exportieren.",
   "auditExportSaved": "{n} Ereignisse exportiert nach {path}",
   "@auditExportSaved": {"placeholders": {"n": {"type": "int"}, "path": {"type": "String"}}},

lib/l10n/app_en.arb

@@ -587,6 +587,8 @@
   "auditMoreTooltip": "More actions",
   "auditSearchHint": "Search events (flow, step, module, error text …)",
   "auditExportAction": "Export current view as JSONL …",
+  "auditExportAllAction": "Export full log as JSONL …",
+  "auditExportAllNothing": "The log is empty — nothing to export.",
   "auditExportNothing": "No events in the current view — nothing to export.",
   "auditExportSaved": "Exported {n} events to {path}",
   "@auditExportSaved": {"placeholders": {"n": {"type": "int"}, "path": {"type": "String"}}},

lib/l10n/app_localizations.dart

@@ -2174,6 +2174,18 @@ abstract class AppLocalizations {
   /// **'Export current view as JSONL …'**
   String get auditExportAction;
 
+  /// No description provided for @auditExportAllAction.
+  ///
+  /// In en, this message translates to:
+  /// **'Export full log as JSONL …'**
+  String get auditExportAllAction;
+
+  /// No description provided for @auditExportAllNothing.
+  ///
+  /// In en, this message translates to:
+  /// **'The log is empty — nothing to export.'**
+  String get auditExportAllNothing;
+
   /// No description provided for @auditExportNothing.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -1209,6 +1209,14 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get auditExportAction => 'Aktuelle Ansicht als JSONL exportieren …';
 
+  @override
+  String get auditExportAllAction =>
+      'Vollständiges Protokoll als JSONL exportieren …';
+
+  @override
+  String get auditExportAllNothing =>
+      'Das Protokoll ist leer — nichts zu exportieren.';
+
   @override
   String get auditExportNothing =>
       'Keine Ereignisse in der aktuellen Ansicht — nichts zu exportieren.';

lib/l10n/app_localizations_en.dart

@@ -1225,6 +1225,12 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get auditExportAction => 'Export current view as JSONL …';
 
+  @override
+  String get auditExportAllAction => 'Export full log as JSONL …';
+
+  @override
+  String get auditExportAllNothing => 'The log is empty — nothing to export.';
+
   @override
   String get auditExportNothing =>
       'No events in the current view — nothing to export.';