fix(RichText): render real Lexical blockquote shape, not nested paragraphs

QuoteNode's children are flat text/linebreak nodes directly (confirmed
by reading @lexical/rich-text's source — insertNewAfter exits the quote
into a new paragraph on Enter, it doesn't nest one inside). The "quote"
case assumed nested paragraph children, which only happened to work for
this session's own hand-authored seed JSON; any blockquote actually
typed in the Payload admin editor rendered blank, since child.children
was undefined on a plain text/linebreak node.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/components/RichText.tsx

@@ -164,17 +164,22 @@ function renderNode(node: LexicalNode, key: string): ReactNode {
             className="absolute left-8 top-[2.1875rem] w-[8.5rem] h-[1.4375rem] object-cover pointer-events-none"
           />
           <div className="w-px self-stretch bg-brand shrink-0" />
-          <div className="flex flex-col gap-3.5 flex-1">
-            {(node.children ?? []).map((child, i) => (
-              <p
-                key={`${key}-q-${i}`}
-                className="text-text-primary text-[1.75rem] leading-[1.1]"
-                style={{ fontFamily: "var(--font-caveat)" }}
-              >
-                {renderChildren(child.children, `${key}-q-${i}`)}
-              </p>
-            ))}
-          </div>
+          {/* Lexical's real QuoteNode holds flat text/linebreak children
+              directly, NOT nested paragraphs — pressing Enter inside a
+              blockquote in the editor exits it into a new paragraph
+              rather than adding a line within it (confirmed by reading
+              @lexical/rich-text's QuoteNode.insertNewAfter). An earlier
+              version of this case assumed nested-paragraph children,
+              which only happened to work for this session's own
+              hand-authored seed JSON — any blockquote actually typed in
+              the CMS (Shift+Enter for a soft line break) rendered blank,
+              since child.children was undefined on a plain text node. */}
+          <p
+            className="text-text-primary text-[1.75rem] leading-[1.1] flex-1"
+            style={{ fontFamily: "var(--font-caveat)" }}
+          >
+            {renderChildren(node.children, key)}
+          </p>
         </div>
       );
     default: