Update backend/app/models.py

backend/app/models.py

@@ -91,7 +91,7 @@ class ShareToken(Base):
     token = Column(String, unique=True, index=True, nullable=False)  # Unique share token
     extraction_id = Column(Integer, ForeignKey("extractions.id"), nullable=False, index=True)
     sender_user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
-    recipient_email = Column(String, nullable=False, index=True)
+    recipient_email = Column(String, nullable=True, index=True)  # Nullable for public share links
     expires_at = Column(DateTime(timezone=True), nullable=True)  # Optional expiration
     accessed = Column(Boolean, default=False)  # Track if link was accessed
     accessed_at = Column(DateTime(timezone=True), nullable=True)