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/api/marianumcloud/autocomplete/autocomplete_response.g.dart

@@ -8,13 +8,12 @@ part of 'autocomplete_response.dart';
 
 AutocompleteResponse _$AutocompleteResponseFromJson(
   Map<String, dynamic> json,
-) => AutocompleteResponse(
-  (json['data'] as List<dynamic>)
-      .map(
-        (e) => AutocompleteResponseObject.fromJson(e as Map<String, dynamic>),
-      )
-      .toList(),
-);
+) => $checkedCreate('AutocompleteResponse', json, ($checkedConvert) {
+  final val = AutocompleteResponse(
+    $checkedConvert('data', (v) => _entriesFromJson(v)),
+  );
+  return val;
+});
 
 Map<String, dynamic> _$AutocompleteResponseToJson(
   AutocompleteResponse instance,
@@ -22,15 +21,18 @@ Map<String, dynamic> _$AutocompleteResponseToJson(
 
 AutocompleteResponseObject _$AutocompleteResponseObjectFromJson(
   Map<String, dynamic> json,
-) => AutocompleteResponseObject(
-  json['id'] as String,
-  json['label'] as String,
-  json['icon'] as String?,
-  json['source'] as String?,
-  json['status'] as String?,
-  json['subline'] as String?,
-  json['shareWithDisplayNameUniqe'] as String?,
-);
+) => $checkedCreate('AutocompleteResponseObject', json, ($checkedConvert) {
+  final val = AutocompleteResponseObject(
+    $checkedConvert('id', (v) => v as String),
+    $checkedConvert('label', (v) => v as String),
+    $checkedConvert('icon', (v) => v as String?),
+    $checkedConvert('source', (v) => v as String?),
+    $checkedConvert('status', (v) => _statusFromJson(v)),
+    $checkedConvert('subline', (v) => v as String?),
+    $checkedConvert('shareWithDisplayNameUnique', (v) => v as String?),
+  );
+  return val;
+});
 
 Map<String, dynamic> _$AutocompleteResponseObjectToJson(
   AutocompleteResponseObject instance,
@@ -41,5 +43,5 @@ Map<String, dynamic> _$AutocompleteResponseObjectToJson(
   'source': instance.source,
   'status': instance.status,
   'subline': instance.subline,
-  'shareWithDisplayNameUniqe': instance.shareWithDisplayNameUniqe,
+  'shareWithDisplayNameUnique': instance.shareWithDisplayNameUnique,
 };