Corrige fallback HTML e consulta tickets por canal

src/components/tickets/new-ticket-dialog.tsx

@@ -63,6 +63,16 @@ function getInitials(name: string | null | undefined, fallback: string): string
   return normalizedFallback.length > 0 ? normalizedFallback.charAt(0).toUpperCase() : "?"
 }
 
+function toHtml(text: string) {
+  const escaped = text
+    .replace(/&/g, "&")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&#039;")
+  return `<p>${escaped.replace(/\n/g, "<br />")}</p>`
+}
+
 type RequesterPreviewProps = {
   customer: CustomerOption | null
   company: { id: string; name: string; isAvulso?: boolean } | null