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/state/app/modules/files/bloc/files_state.g.dart

@@ -6,16 +6,24 @@ part of 'files_state.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-_FilesState _$FilesStateFromJson(Map<String, dynamic> json) => _FilesState(
-  currentPath:
-      (json['currentPath'] as List<dynamic>?)
-          ?.map((e) => e as String)
-          .toList() ??
-      const <String>[],
-  listing: json['listing'] == null
-      ? null
-      : ListFilesResponse.fromJson(json['listing'] as Map<String, dynamic>),
-);
+_FilesState _$FilesStateFromJson(Map<String, dynamic> json) =>
+    $checkedCreate('_FilesState', json, ($checkedConvert) {
+      final val = _FilesState(
+        currentPath: $checkedConvert(
+          'currentPath',
+          (v) =>
+              (v as List<dynamic>?)?.map((e) => e as String).toList() ??
+              const <String>[],
+        ),
+        listing: $checkedConvert(
+          'listing',
+          (v) => v == null
+              ? null
+              : ListFilesResponse.fromJson(v as Map<String, dynamic>),
+        ),
+      );
+      return val;
+    });
 
 Map<String, dynamic> _$FilesStateToJson(_FilesState instance) =>
     <String, dynamic>{