Fix newlines in codeblocks

lib/widgets/chat_page/html/code_block.dart

@@ -41,6 +41,7 @@ class CodeBlock extends StatelessWidget {
                   padding: EdgeInsets.all(8),
                   child: SelectableText(
                     code,
+                    maxLines: 99,
                     style: TextStyle(fontFamily: "monospace"),
                   ),
                 ),

lib/widgets/chat_page/html/html.dart

@@ -30,10 +30,14 @@ class Html extends ConsumerWidget {
       return switch (element.localName) {
         "code" =>
           element.parent?.localName == "pre"
-              ? CodeBlock(
-                  element.text,
-                  lang: element.className.replaceAll("language-", ""),
-                )
+              ? element.outerHtml.contains("<br class=\"fake-break\">")
+                    ? Html(
+                        """<pre>${element.outerHtml.replaceAll("<br class=\"fake-break\">", "\n")}</pre>""",
+                      )
+                    : CodeBlock(
+                        element.text,
+                        lang: element.className.replaceAll("language-", ""),
+                      )
               : null,
 
         "blockquote" => Quoted(Html(element.innerHtml)),

lib/widgets/chat_page/room_chat.dart

@@ -409,7 +409,10 @@ class RoomChat extends HookConsumerWidget {
                                                 return "<a href=\"$url\">$url</a>";
                                               },
                                             )
-                                            .replaceAll("\n", "<br/>"),
+                                            .replaceAll(
+                                              "\n",
+                                              "<br class=\"fake-break\"/>",
+                                            ),
                                       ),
                                       if (message.editedAt != null)
                                         Text(