Markdown rendering for skills, refresh button on replay

- react-markdown + remark-gfm for proper skill SKILL.md rendering
- Prose styles matching dark theme (tables, code blocks, blockquotes)
- Strips YAML frontmatter before rendering
- Refresh button in session replay header

app/history/[id]/page.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { use, useState, useRef } from "react";
-import { ArrowLeft, Send, Loader2, Eye } from "lucide-react";
+import { ArrowLeft, Send, Loader2, Eye, RefreshCw } from "lucide-react";
 import Link from "next/link";
 import { useSession, useMessages } from "@/lib/hooks";
 import { timeAgo, formatTokens, platformBadgeClass } from "@/lib/utils";
@@ -96,6 +96,14 @@ export default function SessionReplayPage({ params }: { params: Promise<{ id: st
             </div>
           )}
         </div>
+        {/* Refresh */}
+        <button
+          onClick={() => { qc.invalidateQueries({ queryKey: ["messages", id] }); qc.invalidateQueries({ queryKey: ["session", id] }); }}
+          className="p-1.5 rounded-lg active:bg-white/[0.04]"
+          style={{ color: "var(--text-2)" }}
+        >
+          <RefreshCw size={16} />
+        </button>
         {/* Verbosity toggle */}
         <div className="relative">
           <button