feat(account): add profile module

[Sam-24-dev]

Summary

• Adds the operational-only Cuenta / Perfil module with local profile persistence.
• Preserves the existing Acceso role gateway and administrative Bitácora-only access.
• Records privacy-safe profile-save activity and keeps the screen responsive and accessible.

Changes

Area	Change
Cuenta	New screen, profile model and controller for full name, email and country.
Shell and roles	Cuenta appears only for the operational profile; invalid and administrative access fail closed.
Bitácora	Successful profile saves record one event without personal data.
Validation	Model, routing and event tests; CSS build and real browser flows.

Testing

• npm run build:css
• npm run validate
• python -m json.tool assets/data/mock-data.json
• npm test (143 passing)
• git diff --check
• Real browser flows at 1440, 1024, 768, 390 and 320 px

Scope

Frontend-only: no authentication, password storage, backend, API or external profile requests.

Contributor checklist

• Linked an approved issue
• Added exactly one type:* label
• No shell scripts were modified
• Documentation updated
• Conventional commit format
• No Co-Authored-By trailers

Closes #10

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