Fix issue description overflow with break-words and overflow-hidden

Long unbroken text (stack traces, file paths, URLs) in issue descriptions
could overflow the container. Add break-words to MarkdownBody and
overflow-hidden to InlineEditor display wrapper.

Fixes PAP-476

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/components/InlineEditor.tsx

@@ -132,7 +132,7 @@ export function InlineEditor({
   return (
     <DisplayTag
       className={cn(
-        "cursor-pointer rounded hover:bg-accent/50 transition-colors",
+        "cursor-pointer rounded hover:bg-accent/50 transition-colors overflow-hidden",
         pad,
         !value && "text-muted-foreground italic",
         className