fix: починил загрузку файлов

lib/backend/modules/messages.dart

@@ -1786,9 +1786,10 @@ class MessagesModule {
   }) async {
     try {
       final response = await _api.sendRequest(Opcode.fileDownload, {
-        'messageId': int.tryParse(messageId) ?? 0,
-        'chatId': chatId,
         'fileId': fileId,
+        'chatId': chatId,
+        'messageId': int.tryParse(messageId) ?? 0,
+        'itemType': 'REGULAR',
       });
 
       if (!response.isOk) return null;

lib/core/utils/media_cache.dart

@@ -1,5 +1,6 @@
 import 'dart:io';
 
+import 'package:flutter/foundation.dart';
 import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
 
@@ -18,6 +19,8 @@ class MediaCache {
   static Directory? _dir;
   static int? _cachedSize;
   static final Map<String, Future<File?>> _inFlight = {};
+  static final Set<String> _present = {};
+  static final Map<String, ValueNotifier<bool>> _presence = {};
 
   static Future<Directory> _cacheDir() async {
     final cached = _dir;
@@ -49,8 +52,10 @@ class MediaCache {
       try {
         await file.setLastModified(DateTime.now());
       } catch (_) {}
+      _markPresent(name, true);
       return file;
     }
+    _markPresent(name, false);
     return null;
   }
 
@@ -103,6 +108,7 @@ class MediaCache {
       }
       await sink.close();
       await part.rename(file.path);
+      _markPresent(name, true);
       final known = _cachedSize;
       if (known != null) {
         try {
@@ -161,6 +167,10 @@ class MediaCache {
       }
     }
     _cachedSize = 0;
+    _present.clear();
+    for (final notifier in _presence.values) {
+      notifier.value = false;
+    }
     return freed;
   }
 
@@ -195,11 +205,35 @@ class MediaCache {
       try {
         total -= await file.length();
         await file.delete();
+        _markAbsentByBasename(p.basename(file.path));
       } catch (_) {}
     }
     _cachedSize = total;
   }
 
+  /// Реактивный флаг наличия файла [name] в кэше (для UI-иконки «скачано»).
+  static ValueListenable<bool> presence(String name) {
+    final key = _sanitize(name);
+    return _presence.putIfAbsent(key, () {
+      final notifier = ValueNotifier(_present.contains(key));
+      if (!notifier.value) existing(name).ignore();
+      return notifier;
+    });
+  }
+
+  static void _markPresent(String name, bool present) {
+    final key = _sanitize(name);
+    final changed = present ? _present.add(key) : _present.remove(key);
+    if (!changed) return;
+    _presence[key]?.value = present;
+  }
+
+  static void _markAbsentByBasename(String basename) {
+    if (_present.remove(basename)) {
+      _presence[basename]?.value = false;
+    }
+  }
+
   static String _sanitize(String name) {
     final cleaned = name.replaceAll(RegExp(r'[\\/:*?"<>|]'), '_').trim();
     return cleaned.isEmpty ? 'file' : cleaned;

lib/frontend/screens/chats/chat/view/composer_input.dart

@@ -53,6 +53,7 @@ class ComposerInputBar extends StatelessWidget {
     this.showAttachButton = true,
     this.forceSend = false,
     this.hintText = 'Message',
+    this.bottomSafe = true,
   });
 
   final String chatType;
@@ -87,6 +88,7 @@ class ComposerInputBar extends StatelessWidget {
   final bool showAttachButton;
   final bool forceSend;
   final String hintText;
+  final bool bottomSafe;
 
   @override
   Widget build(BuildContext context) {
@@ -172,6 +174,7 @@ class ComposerInputBar extends StatelessWidget {
     }
 
     final bar = SafeArea(
+      bottom: bottomSafe,
       child: Column(
         mainAxisSize: MainAxisSize.min,
         children: [

lib/frontend/screens/chats/chat_screen.dart

@@ -2353,9 +2353,12 @@ class _ChatScreenState extends State<ChatScreen>
                   );
                 },
               ),
-              ComposerInputBar(
+              AnimatedBuilder(
-                chatType: _commentsMode ? 'CHAT' : widget.chatType,
+                animation: _stickers.anim,
-                chrome: _effectiveChrome,
+                builder: (context, _) => ComposerInputBar(
+                  bottomSafe: _stickers.anim.value == 0,
+                  chatType: _commentsMode ? 'CHAT' : widget.chatType,
+                  chrome: _effectiveChrome,
                 style: AppComposerStyle.current.value,
                 background: AppComposerBackground.current.value,
                 backdropKey: _pillBackdrop,
@@ -2385,8 +2388,9 @@ class _ChatScreenState extends State<ChatScreen>
                 onSubscribe: _subscribeChannel,
                 showStickerButton: !_commentsMode,
                 showAttachButton: !_commentsMode,
-                forceSend: _commentsMode,
+                  forceSend: _commentsMode,
-                hintText: _commentsMode ? 'Комментарий' : 'Message',
+                  hintText: _commentsMode ? 'Комментарий' : 'Message',
+                ),
               ),
               StickerPanelView(
                 stickers: _stickers,

lib/frontend/widgets/attachment/bubbles/file_bubble.dart

@@ -5,6 +5,7 @@ import 'package:komet/main.dart';
 
 import '../../../../core/utils/download_progress.dart';
 import '../../../../core/utils/file_download.dart';
+import '../../../../core/utils/media_cache.dart';
 import '../../../../core/utils/format.dart';
 import '../../../../core/utils/haptics.dart';
 import '../../../../models/attachment.dart';
@@ -113,38 +114,49 @@ class FileBubble extends StatelessWidget {
               ValueListenableBuilder<double?>(
                 valueListenable: MediaDownloadProgress.notifier(cacheName),
                 builder: (context, progress, _) {
-                  final downloading = progress != null;
+                  final iconColor = isMe
-                  return GestureDetector(
+                      ? ctx.cs.onPrimaryContainer
-                    onTap: downloading
+                      : ctx.cs.primary;
-                        ? null
+                  Widget circle(Widget child, VoidCallback? onTap) {
-                        : () => _downloadFile(ctx.context, file, name),
+                    return GestureDetector(
-                    child: Container(
+                      onTap: onTap,
-                      width: 34,
+                      child: Container(
-                      height: 34,
+                        width: 34,
-                      decoration: BoxDecoration(
+                        height: 34,
-                        color: isMe
+                        decoration: BoxDecoration(
-                            ? ctx.systemTint
+                          color: isMe
-                            : ctx.cs.surfaceContainerHighest,
+                              ? ctx.systemTint
-                        shape: BoxShape.circle,
+                              : ctx.cs.surfaceContainerHighest,
+                          shape: BoxShape.circle,
+                        ),
+                        child: child,
                       ),
-                      child: downloading
+                    );
-                          ? Padding(
+                  }
-                              padding: const EdgeInsets.all(8),
+
-                              child: CircularProgressIndicator(
+                  if (progress != null) {
-                                strokeWidth: 2,
+                    return circle(
-                                value: progress > 0 ? progress : null,
+                      Padding(
-                                color: isMe
+                        padding: const EdgeInsets.all(8),
-                                    ? ctx.cs.onPrimaryContainer
+                        child: CircularProgressIndicator(
-                                    : ctx.cs.primary,
+                          strokeWidth: 2,
-                              ),
+                          value: progress > 0 ? progress : null,
-                            )
+                          color: iconColor,
-                          : Icon(
+                        ),
-                              Symbols.download,
+                      ),
-                              color: isMe
+                      null,
-                                  ? ctx.cs.onPrimaryContainer
+                    );
-                                  : ctx.cs.primary,
+                  }
-                              size: 18,
+
-                            ),
+                  return ValueListenableBuilder<bool>(
+                    valueListenable: MediaCache.presence(cacheName),
+                    builder: (context, cached, _) => circle(
+                      Icon(
+                        cached ? Symbols.check : Symbols.download,
+                        color: iconColor,
+                        size: 18,
+                      ),
+                      () => _downloadFile(ctx.context, file, name),
                     ),
                   );
                 },
@@ -171,8 +183,9 @@ class FileBubble extends StatelessWidget {
     Haptics.tap();
 
     final cacheName = '${fileId}_$name';
+    final cached = (await MediaCache.existing(cacheName)) != null;
 
-    MediaDownloadProgress.set(cacheName, 0);
+    if (!cached) MediaDownloadProgress.set(cacheName, 0);
     final result = await openCachedFile(
       cacheName,
       () => messagesModule.getFileUrl(
@@ -182,7 +195,7 @@ class FileBubble extends StatelessWidget {
       ),
       onProgress: (p) => MediaDownloadProgress.set(cacheName, p),
     );
-    MediaDownloadProgress.set(cacheName, null);
+    if (!cached) MediaDownloadProgress.set(cacheName, null);
     if (!context.mounted) return;
     if (!result.ok) {
       showCustomNotification(