Initial commit: Leopost Full — merge di Leopost, Post Generator e Autopilot OS

- Backend FastAPI con multi-LLM (Claude/OpenAI/Gemini)
- Publishing su Facebook, Instagram, YouTube, TikTok
- Calendario editoriale con awareness levels (PAS, AIDA, BAB...)
- Design system Editorial Fresh (Fraunces + DM Sans)
- Scheduler automatico, gestione commenti AI, affiliate links

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/ProtectedRoute.jsx

@@ -0,0 +1,16 @@
+import { Navigate, Outlet } from 'react-router-dom'
+import { useAuth } from '../AuthContext'
+
+export default function ProtectedRoute() {
+  const { user, loading } = useAuth()
+
+  if (loading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center bg-slate-50">
+        <div className="animate-spin rounded-full h-8 w-8 border-2 border-brand-500 border-t-transparent" />
+      </div>
+    )
+  }
+
+  return user ? <Outlet /> : <Navigate to="/login" />
+}