Cron detail page with output history, markdown skill rendering

- /cron/[id]: job details, prompt, output history from filesystem
- Cron list items now link to detail pages
- Skills render SKILL.md as proper markdown (headings, code, tables)
- Cron output proxy reads from ~/.hermes/cron/output/

app/cron/jobs/[id]/route.ts

@@ -0,0 +1,17 @@
+import { NextRequest, NextResponse } from "next/server";
+
+const GATEWAY = process.env.HERMES_GATEWAY_URL || "http://127.0.0.1:8642";
+
+export async function GET(_req: NextRequest, { params }: { params: Promise<{ id: string }> }) {
+  const { id } = await params;
+  try {
+    const res = await fetch(GATEWAY + "/api/jobs/" + id);
+    const data = await res.text();
+    return new NextResponse(data, {
+      status: res.status,
+      headers: { "content-type": "application/json" },
+    });
+  } catch {
+    return NextResponse.json({ error: "gateway unreachable" }, { status: 502 });
+  }
+}