Show email confirmation status on user profile page (#6626)

[augustocbx]

What github issue is this PR for, if any?

Addresses part of #6626 (does not auto-close it — see scope note below).

What changed, and why?

Issue #6626 ("Improved Email Understanding") asks for three things on the user page:

1. Show all old emails for the user
2. Show the un/confirmed status of the current email
3. Send the confirmation email to both the old and new addresses on an email change

This PR delivers item 2 only, kept deliberately small and self-contained:

• Adds an "Email confirmation status" line ("Confirmed" / "Not confirmed") to the account info on the Edit Profile page.
• Adds a "Pending email confirmation" line showing the unconfirmed_email whenever an email change is awaiting confirmation (Devise reconfirmable).

The status string lives in UserDecorator#email_confirmation_status (presentation logic in the decorator, per the project conventions), and the view renders it in app/views/users/_edit_profile.erb right next to the existing Email line. No model, migration, controller, or dependency changes — :confirmable is already enabled on User.

Scope note (intentionally left as follow-ups):

• Item 1 (show all old emails) needs email-change history/versioning, which is a much larger change.
• Item 3 (dual-send the confirmation email) is the security trade-off the issue itself flags with a "?", so it needs a maintainer/product decision rather than an implementation choice.

I'm happy to open follow-up PRs for either once there's direction.

How is this tested? (please write rspec and jest tests!) 💖💪

• spec/decorators/user_decorator_spec.rb — unit specs for #email_confirmation_status covering the confirmed and not-confirmed cases.
• spec/system/users/edit_spec.rb — system specs verifying the Edit Profile page shows the confirmation status, and shows the pending email when a reconfirmation is in progress.

Commands run locally:

• bundle exec rspec spec/decorators/user_decorator_spec.rb spec/system/users/edit_spec.rb → 56 examples, 0 failures
• bundle exec standardrb app/decorators/user_decorator.rb spec/decorators/user_decorator_spec.rb spec/system/users/edit_spec.rb → clean
• bundle exec erb_lint app/views/users/_edit_profile.erb → No errors were found in ERB files

The system specs fail without the view change and pass with it.

Screenshots please :)

Edit Profile page (/users/edit) with the new lines, while an email change is pending confirmation:

CASA organization CASA Org 1
Added to system June 17, 2026 …
Email email1@example.com
Email confirmation status Confirmed
Pending email confirmation new-email@example.com
Invitation email sent never
…

(Will attach the rendered screenshot in a comment.)