🎨 Use SizedBox.shrink instead of empty SizedBox for placeholder

lib/main.dart

@@ -109,7 +109,7 @@ class SolianApp extends StatelessWidget {
             return SystemShell(
               child: ScaffoldMessenger(
                 child: BootstrapperShell(
-                  child: child ?? const SizedBox(),
+                  child: child ?? const SizedBox.shrink(),
                 ),
               ),
             );

lib/screens/about.dart

@@ -36,7 +36,7 @@ class AboutScreen extends StatelessWidget {
               future: PackageInfo.fromPlatform(),
               builder: (context, snapshot) {
                 if (!snapshot.hasData) {
-                  return const SizedBox();
+                  return const SizedBox.shrink();
                 }
 
                 return Text(

lib/screens/channel/call/call.dart

@@ -84,7 +84,7 @@ class _CallScreenState extends State<CallScreen> with TickerProviderStateMixin {
                     participant: call.focusTrack.value!,
                     onTap: () {},
                   )
-                : const SizedBox(),
+                : const SizedBox.shrink(),
           ),
           Positioned(
             left: 0,

lib/screens/channel/channel_chat.dart

@@ -222,7 +222,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen>
         actions: [
           const BackgroundStateWidget(),
           Builder(builder: (context) {
-            if (_isBusy || _channel == null) return const SizedBox();
+            if (_isBusy || _channel == null) return const SizedBox.shrink();
 
             return ChatCallButton(
               realm: _channel!.realm,
@@ -299,7 +299,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen>
                     if (_chatController.isLoading.isTrue) {
                       return const LinearProgressIndicator().animate().slideY();
                     } else {
-                      return const SizedBox();
+                      return const SizedBox.shrink();
                     }
                   }),
                   ClipRect(
@@ -350,7 +350,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen>
                   ]),
                 );
               }
-              return const SizedBox();
+              return const SizedBox.shrink();
             }),
           ],
         );

lib/screens/chat.dart

@@ -112,7 +112,7 @@ class _ChatScreenState extends State<ChatScreen> {
             children: [
               Obx(() {
                 if (_channels.isLoading.isFalse) {
-                  return const SizedBox();
+                  return const SizedBox.shrink();
                 } else {
                   return const LinearProgressIndicator();
                 }

lib/screens/dashboard.dart

@@ -190,7 +190,7 @@ class _DashboardScreenState extends State<DashboardScreen> {
                         icon: const Icon(Icons.local_fire_department),
                         onPressed: _signingDaily ? null : _signDaily,
                       )
-                    : const SizedBox(),
+                    : const SizedBox.shrink(),
               ),
             ),
           ).paddingSymmetric(horizontal: 8),

lib/screens/feed.dart

@@ -155,7 +155,7 @@ class PostCreatePopup extends StatelessWidget {
     final AuthProvider auth = Get.find();
 
     if (auth.isAuthorized.isFalse) {
-      return const SizedBox();
+      return const SizedBox.shrink();
     }
 
     final List<dynamic> actionList = [

lib/widgets/account/account_badge.dart

@@ -45,7 +45,7 @@ class _AccountBadgeWidgetState extends State<AccountBadgeWidget> {
   Widget build(BuildContext context) {
     final spec = badges[widget.item.type];
 
-    if (spec == null) return const SizedBox();
+    if (spec == null) return const SizedBox.shrink();
 
     return Tooltip(
       richMessage: TextSpan(

lib/widgets/account/account_heading.dart

@@ -71,7 +71,7 @@ class AccountHeadingWidget extends StatelessWidget {
                             content: banner,
                             fit: BoxFit.cover,
                           )
-                        : const SizedBox(),
+                        : const SizedBox.shrink(),
                   ),
                 ),
               ).paddingSymmetric(horizontal: 16),

lib/widgets/app_bar_leading.dart

@@ -22,7 +22,7 @@ class AppBarLeadingButton extends StatelessWidget {
         onPressed: () => rootScaffoldKey.currentState!.openDrawer(),
       );
     } else {
-      return const SizedBox();
+      return const SizedBox.shrink();
     }
   }
 }

lib/widgets/attachments/attachment_editor.dart

@@ -347,7 +347,8 @@ class _AttachmentEditorPopupState extends State<AttachmentEditorPopup> {
                             FutureBuilder(
                               future: element.file.length(),
                               builder: (context, snapshot) {
-                                if (!snapshot.hasData) return const SizedBox();
+                                if (!snapshot.hasData)
+                                  return const SizedBox.shrink();
                                 return Text(
                                   _formatBytes(snapshot.data!),
                                   style: Theme.of(context).textTheme.bodySmall,
@@ -628,7 +629,7 @@ class _AttachmentEditorPopupState extends State<AttachmentEditorPopup> {
                                   ),
                                 );
                               }
-                              return const SizedBox();
+                              return const SizedBox.shrink();
                             }),
                           ],
                         ),
@@ -667,7 +668,7 @@ class _AttachmentEditorPopupState extends State<AttachmentEditorPopup> {
                               ),
                               Obx(() {
                                 if (_uploadController.isUploading.value) {
-                                  return const SizedBox();
+                                  return const SizedBox.shrink();
                                 }
                                 return TextButton(
                                   child: Text('attachmentUploadQueueStart'.tr),
@@ -681,7 +682,7 @@ class _AttachmentEditorPopupState extends State<AttachmentEditorPopup> {
                         ),
                       );
                     }
-                    return const SliverToBoxAdapter(child: SizedBox());
+                    return const SliverToBoxAdapter(child: SizedBox.shrink());
                   }),
                   Obx(() {
                     if (_uploadController.queueOfUpload.isNotEmpty) {
@@ -697,7 +698,7 @@ class _AttachmentEditorPopupState extends State<AttachmentEditorPopup> {
                         ),
                       );
                     }
-                    return const SliverToBoxAdapter(child: SizedBox());
+                    return const SliverToBoxAdapter(child: SizedBox.shrink());
                   }),
                   if (_attachments.isNotEmpty)
                     SliverPadding(

lib/widgets/attachments/attachment_list.dart

@@ -139,7 +139,7 @@ class _AttachmentListState extends State<AttachmentList> {
   @override
   Widget build(BuildContext context) {
     if (widget.attachmentsId.isEmpty) {
-      return const SizedBox();
+      return const SizedBox.shrink();
     }
 
     if (_isLoading) {
@@ -172,7 +172,7 @@ class _AttachmentListState extends State<AttachmentList> {
         children: widget.attachmentsId.map((x) {
           final element = _attachmentsMeta[idx];
           idx++;
-          if (element == null) return const SizedBox();
+          if (element == null) return const SizedBox.shrink();
           double ratio = element.metadata?['ratio']?.toDouble() ?? 16 / 9;
           return Container(
             decoration: BoxDecoration(

lib/widgets/channel/channel_call_indicator.dart

@@ -64,7 +64,7 @@ class ChannelCallIndicator extends StatelessWidget {
           const Gap(6),
           Obx(() {
             if (call.isInitialized.value) {
-              return const SizedBox();
+              return const SizedBox.shrink();
             }
             if (ongoingCall.participants.isNotEmpty) {
               return Container(
@@ -84,7 +84,7 @@ class ChannelCallIndicator extends StatelessWidget {
                 ),
               );
             }
-            return const SizedBox();
+            return const SizedBox.shrink();
           })
         ],
       ),
@@ -113,7 +113,7 @@ class ChannelCallIndicator extends StatelessWidget {
               child: Text('callJoin'.tr),
             );
           }
-          return const SizedBox();
+          return const SizedBox.shrink();
         })
       ],
     );

lib/widgets/chat/call/chat_call_indicator.dart

@@ -11,7 +11,7 @@ class ChatCallCurrentIndicator extends StatelessWidget {
 
     return Obx(() {
       if (call.current.value == null || call.channel.value == null) {
-        return const SizedBox();
+        return const SizedBox.shrink();
       }
 
       return ListTile(

lib/widgets/chat/chat_event.dart

@@ -40,7 +40,7 @@ class ChatEvent extends StatelessWidget {
   }
 
   Widget _buildLinkExpansion() {
-    if (item.body['text'] == null) return const SizedBox();
+    if (item.body['text'] == null) return const SizedBox.shrink();
     return LinkExpansion(content: item.body['text']);
   }
 
@@ -49,7 +49,7 @@ class ChatEvent extends StatelessWidget {
         ? List<String>.from(item.body['attachments']?.whereType<String>())
         : List<String>.empty();
 
-    if (attachments.isEmpty) return const SizedBox();
+    if (attachments.isEmpty) return const SizedBox.shrink();
 
     if (isMinimal) {
       final unFocusColor =
@@ -94,7 +94,7 @@ class ChatEvent extends StatelessWidget {
       ),
       builder: (context, snapshot) {
         if (!snapshot.hasData || snapshot.data == null) {
-          return const SizedBox();
+          return const SizedBox.shrink();
         }
 
         return Container(

lib/widgets/chat/chat_event_list.dart

@@ -96,7 +96,7 @@ class ChatEventList extends StatelessWidget {
               chatController.totalEvents - chatController.currentEvents.length;
 
           if (amount.value <= 0 || chatController.isLoading.isTrue) {
-            return const SliverToBoxAdapter(child: SizedBox());
+            return const SliverToBoxAdapter(child: SizedBox.shrink());
           }
 
           return SliverToBoxAdapter(

lib/widgets/link_expansion.dart

@@ -57,7 +57,7 @@ class LinkExpansion extends StatelessWidget {
     );
     final matches = linkRegex.allMatches(content);
     if (matches.isEmpty) {
-      return const SizedBox();
+      return const SizedBox.shrink();
     }
 
     final LinkExpandProvider expandController = Get.find();
@@ -72,7 +72,7 @@ class LinkExpansion extends StatelessWidget {
             future: expandController.expandLink(x.group(0)!),
             builder: (context, snapshot) {
               if (!snapshot.hasData) {
-                return const SizedBox();
+                return const SizedBox.shrink();
               }
 
               final isRichDescription = [

lib/widgets/posts/editor/post_editor_visibility.dart

@@ -59,7 +59,7 @@ class PostEditorVisibilityDialog extends StatelessWidget {
                 controller.visibility.value == 3) {
               return const Gap(8);
             }
-            return const SizedBox();
+            return const SizedBox.shrink();
           }),
           Obx(() {
             if (controller.visibility.value == 2) {
@@ -86,7 +86,7 @@ class PostEditorVisibilityDialog extends StatelessWidget {
                 },
               );
             }
-            return const SizedBox();
+            return const SizedBox.shrink();
           }),
           Obx(() {
             if (controller.visibility.value == 3) {
@@ -113,7 +113,7 @@ class PostEditorVisibilityDialog extends StatelessWidget {
                 },
               );
             }
-            return const SizedBox();
+            return const SizedBox.shrink();
           }),
         ],
       ),

lib/widgets/posts/post_item.dart

@@ -79,7 +79,7 @@ class _PostItemState extends State<PostItem> {
   }
 
   Widget _buildThumbnail() {
-    if (widget.item.body['thumbnail'] == null) return const SizedBox();
+    if (widget.item.body['thumbnail'] == null) return const SizedBox.shrink();
     final border = BorderSide(
       color: Theme.of(context).dividerColor,
       width: 0.3,
@@ -148,7 +148,7 @@ class _PostItemState extends State<PostItem> {
         vertical: 8,
       );
     }
-    return const SizedBox();
+    return const SizedBox.shrink();
   }
 
   Widget _buildFooter() {
@@ -187,7 +187,7 @@ class _PostItemState extends State<PostItem> {
     }
 
     if (widgets.isEmpty) {
-      return const SizedBox();
+      return const SizedBox.shrink();
     } else {
       return Column(
         crossAxisAlignment: CrossAxisAlignment.start,

lib/widgets/posts/post_warped_list.dart

@@ -29,7 +29,7 @@ class PostWarpedListWidget extends StatelessWidget {
       builderDelegate: PagedChildBuilderDelegate<Post>(
         itemBuilder: (context, item, index) {
           if (item.pinnedAt != null && !isPinned) {
-            return const SizedBox();
+            return const SizedBox.shrink();
           }
           return PostListEntryWidget(
             renderOrder: index,