Add fireproof domains from Fireproof manager dialog

[mallexxx]

Task/Issue URL: https://app.asana.com/1/137249556945/project/1142021229838617/task/1211586281230235?focus=true

Description

• add Add, Add Current site buttons to the Manage Fireproof Sites dialog

Testing Steps

1. open the Manage Fireproof domains dialog from Settings -> Data Clearing: validate no blinking and favicons are shown with letters for missing favicons, Add button should display an alert and domain should be added, Add button should be disabled when invalid domain name is entered
2. Activate "fireDialog" feature flag; open fire dialog from the Fire Dialog using the "Manage" buttons
3. Validate Add Current button only enabled when there's a correct websites loaded
4. Validate cmd+z removes added site, cmd+shift+z re-adds it

Impact and Risks

Low

What could go wrong?

Incorrect "Add" sites buttons behavior

Quality Considerations

Notes to Reviewer

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Internal references:

Definition of Done | Engineering Expectations | Tech Design Template

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Note

Adds Add/Add Current buttons to Fireproof manager with validated input prompt, eTLD+1 normalization, and improved undo/redo handling.

• UI (macOS Fireproof Manager):
  • Add Add and Add Current buttons in Preferences/View/FireproofDomainsViewController.swift with accessibility IDs and toolbar styling.
  • Implement addDomain(_:) sheet with live validation, optional prefill from current tab host, and addition via addDomainSilently.
  • Implement addCurrentDomain(_:) and updateAddCurrentButtonState() to enable/disable based on selected tab URL and fireproof status.
  • Centralize undo/redo with addDomainSilently and removeDomainSilently; apply to remove-selected and remove-all flows, and avoid resetting action names during undo.
• Model:
  • Add FireproofDomains.normalizedHost(fromUserInput:) to validate/normalize user input to eTLD+1 and de-duplicate.
• Alerts:
  • Add NSAlert.fireproofAddDomainPrompt() to present input field for adding a fireproof domain.

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[tomasstrba]

LGTM! ✅ Works as expected