♻️ Refactored the post item

app/composables/useMarkdownProcessor.ts

@@ -0,0 +1,22 @@
+import { createMarkdownExit } from "markdown-exit"
+// @ts-ignore
+import texmath from "markdown-it-texmath"
+import katex from "katex"
+
+export function useMarkdownProcessor() {
+  const processor = createMarkdownExit({
+    breaks: true,
+    html: true,
+    linkify: true,
+    typographer: true
+  // @ts-ignore
+  }).use(texmath, {
+    engine: katex,
+    delimiters: 'dollars',
+    katexOptions: { macros: { "\\RR": "\\mathbb{R}" } }
+  })
+
+  return {
+    render: (content: string) => processor.render(content)
+  }
+}