Fix a few HTML rendering issues

DiscordChatExporter.Core/Exporting/MessageGroupTemplate.cshtml

@@ -434,20 +434,29 @@
                             </div>
                         }
                         // Generic image embed
-                        else if (embed.Kind == EmbedKind.Image && !string.IsNullOrWhiteSpace(embed.Image?.Url))
+                        else if (embed.Kind == EmbedKind.Image && !string.IsNullOrWhiteSpace(embed.Url))
                         {
+                            var embedImageUrl =
+                                embed.Image?.ProxyUrl ?? embed.Image?.Url ??
+                                embed.Thumbnail?.ProxyUrl ?? embed.Thumbnail?.Url ??
+                                embed.Url;
+
                             <div class="chatlog__embed">
-                                <a href="@await ResolveAssetUrlAsync(embed.Image.ProxyUrl ?? embed.Image.Url)">
-                                    <img class="chatlog__embed-generic-image" src="@await ResolveAssetUrlAsync(embed.Image.ProxyUrl ?? embed.Image.Url)" alt="Embedded image" loading="lazy">
+                                <a href="@await ResolveAssetUrlAsync(embedImageUrl)">
+                                    <img class="chatlog__embed-generic-image" src="@await ResolveAssetUrlAsync(embedImageUrl)" alt="Embedded image" loading="lazy">
                                 </a>
                             </div>
                         }
                         // Generic gifv embed
-                        else if (embed.Kind == EmbedKind.Gifv && !string.IsNullOrWhiteSpace(embed.Video?.Url))
+                        else if (embed.Kind == EmbedKind.Gifv && !string.IsNullOrWhiteSpace(embed.Url))
                         {
+                            var embedVideoUrl =
+                                embed.Video?.ProxyUrl ?? embed.Video?.Url ??
+                                embed.Url;
+
                             <div class="chatlog__embed">
-                                <video class="chatlog__embed-generic-gifv" loop width="@embed.Video.Width" height="@embed.Video.Height" onmouseover="this.play()" onmouseout="this.pause()">
-                                    <source src="@await ResolveAssetUrlAsync(embed.Video.ProxyUrl ?? embed.Video.Url)" alt="Embedded video">
+                                <video class="chatlog__embed-generic-gifv" loop width="@embed.Video?.Width" height="@embed.Video?.Height" onmouseover="this.play()" onmouseout="this.pause()">
+                                    <source src="@await ResolveAssetUrlAsync(embedVideoUrl)" alt="Embedded video">
                                 </video>
                             </div>
                         }

DiscordChatExporter.Core/Exporting/PreambleTemplate.cshtml

@@ -583,6 +583,8 @@
         }
 
         .chatlog__embed-generic-image {
+            object-fit: contain;
+            object-position: left;
             max-width: 45vw;
             max-height: 500px;
             vertical-align: top;
@@ -590,6 +592,8 @@
         }
 
         .chatlog__embed-generic-gifv {
+            object-fit: contain;
+            object-position: left;
             max-width: 45vw;
             max-height: 500px;
             vertical-align: top;
@@ -744,6 +748,7 @@
             background-color: @Themed("#2f3136", "#f9f9f9");
             font-family: "Consolas", "Courier New", Courier, monospace;
             font-size: 0.85rem;
+            text-decoration: inherit;
         }
 
         .chatlog__markdown-pre--multiline {