feat: RRSS hub estilo Miia + Ad Tracker por cliente

Replica agua-miia/rrss (hub, archivo, octubre 2026 con 27 piezas) y añade Ad Tracker por tenant al estilo Brava (periodos, Meta+Google, CPL/clics, campañas).

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/dashboard/calendario/PublishRrssButton.tsx

@@ -0,0 +1,42 @@
+'use client';
+
+import React, { useState } from 'react';
+import { Upload } from 'lucide-react';
+
+export default function PublishRrssButton() {
+  const [busy, setBusy] = useState(false);
+  const [msg, setMsg] = useState<string | null>(null);
+
+  async function publish() {
+    setBusy(true);
+    setMsg(null);
+    try {
+      const r = await fetch('/api/calendar/publish', { method: 'POST' });
+      const j = await r.json();
+      if (!r.ok) {
+        setMsg(j.error || 'Error al publicar');
+        return;
+      }
+      setMsg(`Publicado · ${j.pieces} piezas · ${j.month}`);
+    } catch (e) {
+      setMsg(e instanceof Error ? e.message : 'Error');
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return (
+    <div className="flex flex-col gap-1">
+      <button
+        type="button"
+        disabled={busy}
+        onClick={publish}
+        className="inline-flex items-center justify-center min-h-[52px] px-6 rounded-xl border border-emerald-500/40 bg-emerald-500/15 text-emerald-300 text-sm font-bold hover:bg-emerald-500/25 disabled:opacity-50"
+      >
+        <Upload className="w-4 h-4 mr-2" />
+        {busy ? 'Publicando…' : 'Publicar mes en portal'}
+      </button>
+      {msg ? <p className="text-[11px] text-gray-400">{msg}</p> : null}
+    </div>
+  );
+}