graph TD;    subgraph User Interactions        User[👤 User] -->|Enter domain| WebApp[🌐 Frontend];        WebApp -->|Send API request| API[⚙️ Nitro API];        API -->|Auth Check| Auth[🔐 Auth Service];        API -->|Store domain info| Database[🗄️ PostgreSQL / Supabase];    end    subgraph Automated Cron Jobs        CronService[⏳ Cron Service] -->|Trigger Updates| EdgeFunctions[⚡ Edge Functions];        EdgeFunctions -->|Fetch WHOIS, DNS, SSL| ExternalAPIs[🌎 Analysis Services];        EdgeFunctions -->|Store Data| Database;                CronService -->|Monitor Uptime| WebsiteMonitor[📡 Uptime Monitor];        WebsiteMonitor -->|Store Metrics| Database;        CronService -->|Check Expirations| ExpiryChecker[📆 Expiration Check];        ExpiryChecker -->|Update Status| Database;                CronService -->|Send Notifications| NotificationService[🔔 Notification System];        NotificationService -->|Email| Resend[📧 Resend];        NotificationService -->|SMS| Twilio[📱 Twilio];    end    Database -->|Serve Data| WebApp;

classDiagram  class users {    uuid id    text email    timestamp created_at    timestamp updated_at  }  class domains {    uuid id    uuid user_id    text domain_name    date expiry_date    text notes    timestamp created_at    timestamp updated_at    uuid registrar_id    timestamp registration_date    timestamp updated_date  }  class registrars {    uuid id    text name    text url    uuid user_id  }  class tags {    uuid id    text name    text color    text description    text icon    uuid user_id  }  class domain_tags {    uuid domain_id    uuid tag_id  }  class notifications {    uuid id    uuid user_id    uuid domain_id    text change_type    text message    boolean sent    boolean read    timestamp created_at  }  class billing {    uuid id    uuid user_id    text current_plan    timestamp next_payment_due    text billing_method    timestamp created_at    timestamp updated_at    jsonb meta  }  class dns_records {    uuid id    uuid domain_id    text record_type    text record_value    timestamp created_at    timestamp updated_at  }  class domain_costings {    uuid id    uuid domain_id    numeric purchase_price    numeric current_value    numeric renewal_cost    boolean auto_renew    timestamp created_at    timestamp updated_at  }  class domain_hosts {    uuid domain_id    uuid host_id  }  class domain_links {    uuid id    uuid domain_id    text link_name    text link_url    timestamp created_at    timestamp updated_at    text link_description  }  class domain_statuses {    uuid id    uuid domain_id    text status_code    timestamp created_at  }  class domain_updates {    uuid id    uuid domain_id    uuid user_id    text change    text change_type    text old_value    text new_value    timestamp date  }  class uptime {    uuid id    uuid domain_id    timestamp checked_at    boolean is_up    integer response_code    numeric response_time_ms    numeric dns_lookup_time_ms    numeric ssl_handshake_time_ms    timestamp created_at  }  class ssl_certificates {    uuid id    uuid domain_id    text issuer    text issuer_country    text subject    date valid_from    date valid_to    text fingerprint    integer key_size    text signature_algorithm    timestamp created_at    timestamp updated_at  }  class whois_info {    uuid id    uuid domain_id    text country    text state    text name    text organization    text street    text city    text postal_code  }  class user_info {    uuid id    uuid user_id    jsonb notification_channels    timestamp created_at    timestamp updated_at    text current_plan  }  class hosts {    uuid id    inet ip    numeric lat    numeric lon    text isp    text org    text as_number    text city    text region    text country    uuid user_id  }  class ip_addresses {    uuid id    uuid domain_id    inet ip_address    boolean is_ipv6    timestamp created_at    timestamp updated_at  }  class notification_preferences {    uuid id    uuid domain_id    text notification_type    boolean is_enabled    timestamp created_at    timestamp updated_at  }  class sub_domains {    uuid id    uuid domain_id    text name    timestamp created_at    timestamp updated_at    jsonb sd_info  }  users --> domains : user_id  registrars --> domains : registrar_id  users --> registrars : user_id  users --> tags : user_id  domains --> domain_tags : domain_id  tags --> domain_tags : tag_id  users --> notifications : user_id  domains --> notifications : domain_id  users --> billing : user_id  domains --> dns_records : domain_id  domains --> domain_costings : domain_id  domains --> domain_hosts : domain_id  hosts --> domain_hosts : host_id  domains --> domain_links : domain_id  domains --> domain_statuses : domain_id  domains --> domain_updates : domain_id  users --> domain_updates : user_id  domains --> uptime : domain_id  domains --> ssl_certificates : domain_id  domains --> whois_info : domain_id  users --> user_info : user_id  users --> hosts : user_id  domains --> ip_addresses : domain_id  domains --> notification_preferences : domain_id  domains --> sub_domains : domain_id