Rails mail_to obfuscation

mail_to_obfuscation

```ruby
# app/helpers/application_helper.rb
def obfuscated_mail_to(email, options = {}, &block)
  user, domain = email.split('@')
  
  options[:data] ||= {}
  options[:data].merge!(
    controller: "mail-obfuscator",
    mail_obfuscator_user_value: user,
    mail_obfuscator_domain_value: domain,
    # The secret sauce: Trigger on everything
    action: "mouseover->mail-obfuscator#reveal focus->mail-obfuscator#reveal mouseout->mail-obfuscator#reset blur->mail-obfuscator#reset click->mail-obfuscator#reveal"
  )
  options[:href] ||= "#"
  
  link_to(options[:href], options, &block)
end
```

```javascript
// app/javascript/controllers/mail_obfuscator_controller.js
import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static values = { user: String, domain: String }

  connect() {
    // Ensure it's dead on arrival
    this.element.href = "#"
  }

  reveal() {
    // Assemble only when needed
    this.element.href = `mailto:${this.userValue}@${this.domainValue}`
  }

  reset() {
    // Cover your tracks
    this.element.href = "#"
  }
}
```