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/config.py

@@ -0,0 +1,15 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    database_url: str = "sqlite:///./data/leopost.db"
+    secret_key: str = "change-me-to-a-random-secret-key"
+    admin_username: str = "admin"
+    admin_password: str = "changeme"
+    access_token_expire_minutes: int = 1440  # 24h
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()