docs(markdown-editor): trim the height comment to the two load-bearing gotchas

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/shared/markdown-editor/markdown-editor-field.tsx

@@ -80,12 +80,9 @@ export function MarkdownEditorField({
         [mode, onChange, disabled],
     );
 
-    // The field owns its height so no consumer repeats it: it fills its flex parent on desktop (the split-view
-    // panes) and takes a FIXED near-viewport height on mobile/tablet (the stacked forms). Fixed, not `min-h`, so a
-    // long doc scrolls inside the editor instead of stretching the page to its full content height — the mobile
-    // stack has no flex parent to cap it. Keyed off the SAME breakpoint hook the surrounding layouts switch on so
-    // the two never disagree; a plain CSS media-query variant would drift from that JS breakpoint. `className` is
-    // last, so a consumer can still override the height.
+    // `h-`, not `min-h`: the mobile/tablet stack has no flex parent to cap the box, so `min-h` would let a long
+    // doc stretch the editor (and the page) to full content height instead of scrolling inside it. Height tracks
+    // useBreakpoint, not a CSS variant, because the layouts split at 1200px — which is no Tailwind breakpoint.
     const { isDesktop } = useBreakpoint();
     const boxClassName = cn(isDesktop ? 'min-h-0 flex-1' : 'h-[calc(100dvh-5rem)]', className);