feat/fix: иконки у каналов/групп/ботов, + миниатюры и иконки к видам медиа на экране чатов

lib/backend/modules/chats.dart

@@ -14,6 +14,7 @@ import '../../core/storage/chat_members_store.dart';
 import '../../core/storage/token_storage.dart';
 import '../../core/utils/logger.dart';
 import '../../core/utils/text_format.dart';
+import '../../models/chat_preview_media.dart';
 import '../../models/contact_info.dart';
 import '../api.dart';
 import 'chat_parsing.dart';
@@ -63,6 +64,7 @@ class CachedChat {
   final String? lastMsgText;
   final String? lastMsgTextOneLine;
   final String? lastMsgElements;
+  final String? lastMsgPreview;
   final int? lastMsgSenderId;
   final String? lastMsgStatus;
   final int unreadCount;
@@ -92,6 +94,7 @@ class CachedChat {
     this.lastMsgTime,
     this.lastMsgText,
     this.lastMsgElements,
+    this.lastMsgPreview,
     this.lastMsgSenderId,
     this.lastMsgStatus,
     required this.unreadCount,
@@ -116,6 +119,10 @@ class CachedChat {
 
   bool get isOfficial => options.contains('OFFICIAL');
 
+  late final ChatPreviewMedia? lastMsgMedia = ChatPreviewMedia.decode(
+    lastMsgPreview,
+  );
+
   List<FormatRange> get lastMsgFormatRanges {
     final raw = lastMsgElements;
     if (raw == null || raw.isEmpty) return const [];
@@ -176,6 +183,7 @@ class CachedChat {
     lastMsgTime: row['last_msg_time'] as int?,
     lastMsgText: row['last_msg_text'] as String?,
     lastMsgElements: row['last_msg_elements'] as String?,
+    lastMsgPreview: row['last_msg_preview'] as String?,
     lastMsgSenderId: row['last_msg_sender'] as int?,
     lastMsgStatus: row['last_msg_status'] as String?,
     unreadCount: row['unread_count'] as int,
@@ -220,6 +228,7 @@ class CachedChat {
     'last_msg_time': lastMsgTime,
     'last_msg_text': lastMsgText,
     'last_msg_elements': lastMsgElements,
+    'last_msg_preview': lastMsgPreview,
     'last_msg_sender': lastMsgSenderId,
     'last_msg_status': lastMsgStatus,
     'unread_count': unreadCount,
@@ -252,6 +261,7 @@ class CachedChat {
     Object? lastMsgTime = _keep,
     Object? lastMsgText = _keep,
     Object? lastMsgElements = _keep,
+    Object? lastMsgPreview = _keep,
     Object? lastMsgSenderId = _keep,
     Object? lastMsgStatus = _keep,
     int? unreadCount,
@@ -289,6 +299,9 @@ class CachedChat {
       lastMsgElements: identical(lastMsgElements, _keep)
           ? this.lastMsgElements
           : lastMsgElements as String?,
+      lastMsgPreview: identical(lastMsgPreview, _keep)
+          ? this.lastMsgPreview
+          : lastMsgPreview as String?,
       lastMsgSenderId: identical(lastMsgSenderId, _keep)
           ? this.lastMsgSenderId
           : lastMsgSenderId as int?,
@@ -547,6 +560,7 @@ class ChatsModule {
     required String text,
     required String status,
     List<Map<String, dynamic>>? elements,
+    String? preview,
   }) async {
     final thisId = int.tryParse(messageId);
     await _updateChat(accountId, chatId, (chat) {
@@ -558,6 +572,7 @@ class ChatsModule {
         lastMsgElements: (elements != null && elements.isNotEmpty)
             ? jsonEncode(elements)
             : null,
+        lastMsgPreview: preview,
         lastMsgTime: time,
         lastEventTime: time,
         lastMsgSenderId: accountId,
@@ -891,6 +906,7 @@ class ChatsModule {
       }
       newRow['last_msg_text'] = messagePreviewText(msg);
       newRow['last_msg_elements'] = messagePreviewElements(msg);
+      newRow['last_msg_preview'] = messagePreviewMedia(msg);
       if (senderId != null) newRow['last_msg_sender'] = senderId;
       newRow['last_msg_status'] = 'sent';
     }
@@ -960,7 +976,9 @@ class ChatsModule {
       final rawText = m['text']?.toString();
       String? previewText = rawText;
       String? elementsJson;
+      String? previewMedia;
       final payload = _decodePayload(m['payload']);
+      if (payload != null) previewMedia = messagePreviewMedia(payload);
       if (rawText == null || rawText.isEmpty) {
         if (payload != null) previewText = messagePreviewText(payload);
       } else {
@@ -969,6 +987,7 @@ class ChatsModule {
       newRow['last_msg_id'] = int.tryParse(m['id']?.toString() ?? '');
       newRow['last_msg_text'] = previewText ?? m['text'];
       newRow['last_msg_elements'] = elementsJson;
+      newRow['last_msg_preview'] = previewMedia;
       newRow['last_msg_time'] = m['time'];
       newRow['last_msg_sender'] = m['sender_id'];
       newRow['last_msg_status'] = m['status'];
@@ -976,6 +995,7 @@ class ChatsModule {
       newRow['last_msg_id'] = null;
       newRow['last_msg_text'] = lastMsgPlaceholder;
       newRow['last_msg_elements'] = null;
+      newRow['last_msg_preview'] = null;
       newRow['last_msg_sender'] = null;
       newRow['last_msg_status'] = null;
     }