feat(auth): build complete two-factor authentication workspace interface

[mijinummi]

Summary
feat(auth): build complete two-factor authentication workspace interface components

• Expands frontend auth API profiles supporting setup, enablement, and verify methods
• Introduces settings panel route view logic tracking persistent TOTP setup flows
• Integrates emergency code protection loops forcing backup acknowledgments
• Intercepts login views dynamically to inject auto-focused OTP elements via memory spaces
• Handles inline input fallback fields gracefully for invalid validation cycles
• Closes [FE-01] Two-Factor Authentication Frontend: Security Settings Page & Two-Step Login #964

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