refactor(frontend): EmptyState + LoadingSkeleton primitives; unified ThoughtForm replaces PostThoughtForm and ReplyForm

thoughts-frontend/components/thought-card.tsx

@@ -36,7 +36,7 @@ import {
   MoreHorizontal,
   Trash2,
 } from "lucide-react";
-import { ReplyForm } from "@/components/reply-form";
+import { ThoughtForm } from "@/components/thought-form";
 import Link from "next/link";
 import { cn } from "@/lib/utils";
 
@@ -195,9 +195,9 @@ export function ThoughtCard({
 
         {isReplyOpen && (
           <div className="border-t m-4 rounded-2xl border-border/50 bg-secondary/20 ">
-            <ReplyForm
-              parentThoughtId={thought.id}
-              onReplySuccess={() => setIsReplyOpen(false)}
+            <ThoughtForm
+              replyToId={thought.id}
+              onSuccess={() => setIsReplyOpen(false)}
             />
           </div>
         )}