refactor: Enable rule avoid dynamic

lib/pages/chat/chat.dart

@@ -117,9 +117,9 @@ class ChatController extends State<ChatPageWithRoom>
   bool currentlyTyping = false;
   bool dragging = false;
 
-  void onDragEntered(dynamic _) => setState(() => dragging = true);
+  void onDragEntered(_) => setState(() => dragging = true);
 
-  void onDragExited(dynamic _) => setState(() => dragging = false);
+  void onDragExited(_) => setState(() => dragging = false);
 
   void onDragDone(DropDoneDetails details) async {
     setState(() => dragging = false);
@@ -213,7 +213,7 @@ class ChatController extends State<ChatPageWithRoom>
     context.go('/rooms');
   }
 
-  void requestHistory([dynamic _]) async {
+  void requestHistory([_]) async {
     Logs().v('Requesting history...');
     await timeline?.requestHistory(historyCount: _loadHistoryCount);
   }
@@ -265,7 +265,7 @@ class ChatController extends State<ChatPageWithRoom>
     }
   }
 
-  void _shareItems([dynamic _]) {
+  void _shareItems([_]) {
     final shareItems = widget.shareItems;
     if (shareItems == null || shareItems.isEmpty) return;
     if (!room.otherPartyCanReceiveMessages) {
@@ -1053,7 +1053,7 @@ class ChatController extends State<ChatPageWithRoom>
     scrollController.jumpTo(0);
   }
 
-  void onEmojiSelected(dynamic _, Emoji? emoji) {
+  void onEmojiSelected(_, Emoji? emoji) {
     typeEmoji(emoji);
     onInputBarChanged(sendController.text);
   }

lib/pages/chat/events/audio_player.dart

@@ -151,7 +151,7 @@ class AudioPlayerState extends State<AudioPlayerWidget> {
     setState(() => status = AudioPlayerStatus.downloading);
     try {
       final fileSize = widget.event.content
-          .tryGetMap<String, dynamic>('info')
+          .tryGetMap<String, Object?>('info')
           ?.tryGet<int>('size');
       matrixFile = await widget.event.downloadAndDecryptAttachment(
         onDownloadProgress: fileSize != null && fileSize > 0
@@ -242,7 +242,7 @@ class AudioPlayerState extends State<AudioPlayerWidget> {
 
   List<int>? _getWaveform() {
     final eventWaveForm = widget.event.content
-        .tryGetMap<String, dynamic>('org.matrix.msc1767.audio')
+        .tryGetMap<String, Object?>('org.matrix.msc1767.audio')
         ?.tryGetList<int>('waveform');
     if (eventWaveForm == null || eventWaveForm.isEmpty) {
       return null;
@@ -275,7 +275,7 @@ class AudioPlayerState extends State<AudioPlayerWidget> {
     }
 
     final durationInt = widget.event.content
-        .tryGetMap<String, dynamic>('info')
+        .tryGetMap<String, Object?>('info')
         ?.tryGet<int>('duration');
     if (durationInt != null) {
       final duration = Duration(milliseconds: durationInt);

lib/pages/chat/events/message_download_content.dart

@@ -27,7 +27,7 @@ class MessageDownloadContent extends StatelessWidget {
     final filetype = (filename.contains('.')
         ? filename.split('.').last.toUpperCase()
         : event.content
-                  .tryGetMap<String, dynamic>('info')
+                  .tryGetMap<String, Object?>('info')
                   ?.tryGet<String>('mimetype')
                   ?.toUpperCase() ??
               'UNKNOWN');

lib/pages/chat/events/message_reactions.dart

@@ -26,7 +26,7 @@ class MessageReactions extends StatelessWidget {
 
     for (final e in allReactionEvents) {
       final key = e.content
-          .tryGetMap<String, dynamic>('m.relates_to')
+          .tryGetMap<String, Object?>('m.relates_to')
           ?.tryGet<String>('key');
       if (key != null) {
         if (!reactionMap.containsKey(key)) {

lib/pages/chat/start_poll_bottom_sheet.dart

@@ -56,7 +56,7 @@ class _StartPollBottomSheetState extends State<StartPollBottomSheet> {
     }
   }
 
-  void _updateCanCreate([dynamic _]) {
+  void _updateCanCreate([_]) {
     final newCanCreate =
         _bodyController.text.trim().isNotEmpty &&
         !_answers.any((controller) => controller.text.trim().isEmpty);