feat(passkeys): Add postRemovePasskey email template

[vpomerleau]

Because

• We want to sent a security notification to users when a passkey is deleted

This pull request

• Adds the new template with MJML and TXT versions, l10n
• Wires up the passkey deletion route to send out the email when deletion is successful

Issue that this pull request solves

Closes: FXA-13368

Checklist

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• My commit is GPG signed.
• If applicable, I have modified or added tests which pass locally.
• I have added necessary documentation (if appropriate).
• I have verified that my changes render correctly in RTL (if appropriate).
• I have manually reviewed all AI generated code.

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Other information (Optional)

Figma: https://www.figma.com/design/4ToDEuz5HU1HyBrFCIZe4v/Passkeys?node-id=3005-51497&t=gJRBOR7oOXZntqO6-4

[Copilot]

Pull request overview

Adds passkey lifecycle notification emails (creation + deletion) to FxA, including new email-renderer templates/partials and wiring the auth-server passkey routes to send these emails on successful operations.

Changes:

• Added postAddPasskey and postRemovePasskey email templates (MJML + TXT) with en-US l10n, plus a new automatedEmailSignIn footer partial.
• Wired passkey registration finish + passkey deletion routes to send the corresponding notification emails (with tests).
• Extended link-building/config to support new support URLs and a security settings deep link.

Reviewed changes

Copilot reviewed 35 out of 36 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/fxa-auth-server/lib/senders/fxa-mailer.ts	Adds mailer send methods for the new passkey templates and builds required links.
packages/fxa-auth-server/lib/senders/fxa-mailer-sanity-check.ts	Adds type-safety “sanity check” invocations for the new mailer methods.
packages/fxa-auth-server/lib/routes/passkeys.ts	Sends passkey creation/deletion notification emails on successful operations.
packages/fxa-auth-server/lib/routes/passkeys.spec.ts	Adds tests asserting passkey emails are sent/skipped and errors are swallowed.
packages/fxa-auth-server/config/index.ts	Adds new SMTP support URL config fields and updates derived SMTP config.
packages/fxa-admin-server/src/config/index.ts	Updates/supports new email-link config fields used by the email renderer/link builder.
libs/accounts/email-renderer/src/templates/postSigninRecoveryPhone/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/postSigninRecoveryCode/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/postRemoveRecoveryPhone/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/postRemovePasskey/index.txt	Adds plaintext template for “passkey removed” notification.
libs/accounts/email-renderer/src/templates/postRemovePasskey/index.ts	Registers metadata/types for postRemovePasskey.
libs/accounts/email-renderer/src/templates/postRemovePasskey/index.stories.ts	Adds Storybook story for postRemovePasskey.
libs/accounts/email-renderer/src/templates/postRemovePasskey/index.mjml	Adds MJML template for “passkey removed” notification.
libs/accounts/email-renderer/src/templates/postRemovePasskey/en.ftl	Adds en-US strings for postRemovePasskey.
libs/accounts/email-renderer/src/templates/postChangeRecoveryPhone/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/postAddRecoveryPhone/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/postAddPasskey/index.txt	Adds plaintext template for “passkey created” notification.
libs/accounts/email-renderer/src/templates/postAddPasskey/index.ts	Registers metadata/types for postAddPasskey.
libs/accounts/email-renderer/src/templates/postAddPasskey/index.stories.ts	Adds Storybook stories for postAddPasskey (with/without Sync note).
libs/accounts/email-renderer/src/templates/postAddPasskey/index.mjml	Adds MJML template for “passkey created” notification.
libs/accounts/email-renderer/src/templates/postAddPasskey/en.ftl	Adds en-US strings for postAddPasskey.
libs/accounts/email-renderer/src/templates/passwordResetRecoveryPhone/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/passwordReset/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/passwordChanged/index.txt	Removes redundant plaintext support footer include.
libs/accounts/email-renderer/src/templates/index.ts	Exports the new passkey templates.
libs/accounts/email-renderer/src/renderer/fxa-email-renderer.ts	Adds renderer methods for the new passkey templates.
libs/accounts/email-renderer/src/renderer/fxa-email-renderer.spec.ts	Adds snapshot coverage for rendering the new templates.
libs/accounts/email-renderer/src/renderer/email-link-builder.ts	Adds new support links + buildSecuritySettingsLink, and UTM mappings for new templates.
libs/accounts/email-renderer/src/renderer/email-link-builder.spec.ts	Adds unit tests for the new link builder methods.
libs/accounts/email-renderer/src/partials/automatedEmailSignIn/index.txt	Adds plaintext footer partial pointing users to security settings/support.
libs/accounts/email-renderer/src/partials/automatedEmailSignIn/index.ts	Adds TemplateData type for the new footer partial.
libs/accounts/email-renderer/src/partials/automatedEmailSignIn/index.stories.ts	Adds Storybook story for the new footer partial.
libs/accounts/email-renderer/src/partials/automatedEmailSignIn/index.mjml	Adds MJML footer partial for automated sign-in/security guidance.
libs/accounts/email-renderer/src/partials/automatedEmailSignIn/en.ftl	Adds en-US strings for the new footer partial.
libs/accounts/email-renderer/gruntfile.js	Ensures new FTL files are included in the localization build.

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[Copilot]

Pull request overview

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

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