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>

backend/app/database.py

@@ -0,0 +1,20 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, declarative_base
+
+from .config import settings
+
+connect_args = {}
+if settings.database_url.startswith("sqlite"):
+    connect_args["check_same_thread"] = False
+
+engine = create_engine(settings.database_url, connect_args=connect_args)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()