feat: switch to revolt.js@6.0.0 + new revolt-api

src/components/markdown/Markdown.tsx

@@ -3,7 +3,7 @@ import { Suspense, lazy } from "preact/compat";
 const Renderer = lazy(() => import("./Renderer"));
 
 export interface MarkdownProps {
-    content?: string;
+    content?: string | null;
     disallowBigEmoji?: boolean;
 }
 

src/components/markdown/Renderer.tsx

@@ -129,7 +129,7 @@ export default function Renderer({ content, disallowBigEmoji }: MarkdownProps) {
     const { openLink } = useIntermediate();
 
     if (typeof content === "undefined") return null;
-    if (content.length === 0) return null;
+    if (!content || content.length === 0) return null;
 
     // We replace the message with the mention at the time of render.
     // We don't care if the mention changes.