msglist [nfc]: Add two params to MessageTimestampStyle.format, to use soon

Author: chrisbobbe

lib/widgets/lightbox.dart

@@ -167,6 +167,7 @@ class _LightboxPageLayoutState extends State<_LightboxPageLayout> {
 
   @override
   Widget build(BuildContext context) {
+    final zulipLocalizations = ZulipLocalizations.of(context);
     final store = PerAccountStoreWidget.of(context);
     final themeData = Theme.of(context);
 
@@ -176,8 +177,8 @@ class _LightboxPageLayoutState extends State<_LightboxPageLayout> {
 
     PreferredSizeWidget? appBar;
     if (_headerFooterVisible) {
-      final timestampText = MessageTimestampStyle.lightbox
-        .format(widget.message.timestamp);
+      final timestampText = MessageTimestampStyle.lightbox.format(
+        widget.message.timestamp, now: DateTime.now(), zulipLocalizations: zulipLocalizations);
 
       // We use plain [AppBar] instead of [ZulipAppBar], even though this page
       // has a [PerAccountStore], because:

lib/widgets/message_list.dart

@@ -1915,12 +1915,14 @@ class SenderRow extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final zulipLocalizations = ZulipLocalizations.of(context);
     final store = PerAccountStoreWidget.of(context);
     final messageListTheme = MessageListTheme.of(context);
     final designVariables = DesignVariables.of(context);
 
     final sender = store.getUser(message.senderId);
-    final timestamp = timestampStyle.format(message.timestamp);
+    final timestamp = timestampStyle.format(
+      message.timestamp, now: DateTime.now(), zulipLocalizations: zulipLocalizations);
 
     final showAsMuted = _showAsMuted(context, store);
 
@@ -2010,7 +2012,11 @@ enum MessageTimestampStyle {
 
   /// Format a [Message.timestamp] for this mode.
   // TODO(i18n): locale-specific formatting (see #45 for a plan with ffi)
-  String? format(int messageTimestamp) {
+  String? format(
+    int messageTimestamp, {
+    required DateTime now,
+    required ZulipLocalizations zulipLocalizations,
+  }) {
     final asDateTime =
       DateTime.fromMillisecondsSinceEpoch(1000 * messageTimestamp);