hardened API decoding against server fields the models did not expect

The Talk room list crashed for a new account because the server omits
lastMessage for rooms without a visible message and the model required it.
Beyond that single field, a review of the Talk models against the OpenAPI
spec of the installed version (23.0.8) found the same crash class in several
places: closed enums over open server values (inCall bitmask, rich-object
types, actor and message types), a deleted parent sent as {id, deleted},
and the autocomplete status arriving as an object.

- json_serializable `checked: true`: decode errors now name class and field
- lists (rooms, messages, participants, autocomplete) decode per entry;
  a malformed entry is skipped and reported via ClientErrorReporter
- unknownEnumValue fallbacks for all response enums of Talk and breakers
- lastMessage nullable; inCall as bitmask; deleted parent placeholder;
  autocomplete status object/string; fixed shareWithDisplayNameUnique key
- GetRoomParams no longer sends null query parameters

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HrepDTL4qDe35TuS29sLW3

lib/storage/talk_settings.g.dart

@@ -6,12 +6,25 @@ part of 'talk_settings.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-TalkSettings _$TalkSettingsFromJson(Map<String, dynamic> json) => TalkSettings(
-  sortFavoritesToTop: json['sortFavoritesToTop'] as bool,
-  sortUnreadToTop: json['sortUnreadToTop'] as bool,
-  drafts: Map<String, String>.from(json['drafts'] as Map),
-  draftReplies: Map<String, int>.from(json['draftReplies'] as Map),
-);
+TalkSettings _$TalkSettingsFromJson(Map<String, dynamic> json) =>
+    $checkedCreate('TalkSettings', json, ($checkedConvert) {
+      final val = TalkSettings(
+        sortFavoritesToTop: $checkedConvert(
+          'sortFavoritesToTop',
+          (v) => v as bool,
+        ),
+        sortUnreadToTop: $checkedConvert('sortUnreadToTop', (v) => v as bool),
+        drafts: $checkedConvert(
+          'drafts',
+          (v) => Map<String, String>.from(v as Map),
+        ),
+        draftReplies: $checkedConvert(
+          'draftReplies',
+          (v) => Map<String, int>.from(v as Map),
+        ),
+      );
+      return val;
+    });
 
 Map<String, dynamic> _$TalkSettingsToJson(TalkSettings instance) =>
     <String, dynamic>{