* UX: Move modal footer into better container
This commit moves the modal footer under the sign-up form for a more cohesive feel between the login + create account modals.
* Fixes an issue where long translations cause layout issues
* Fixes an issue where the alignment shifts when switching between signup/login
* Makes some of the margin/padding more consistent
* Removes duplicate .login-modal and .create-account classes and replaces them with .login-modal-body and .create-account-body
* Adds another color transformation so we could remove prefers-color-scheme... the problem with that was that my OS' UI might be set to something different than my Discourse preferences (prefers-color-scheme only responds to OS UI settings)
* UX: Second Factor + Alert Display
This commit removes JS edits of the modal-alert and uses CSS instead. This commit also adds some styling to the 2FA login when using a key instead of a 2FA authenticator.
This commit adjusts the scroll gradient on the login modal, changes `email / username` to `Email / Username` and adjusts the color of social button icons on hover in the login modal.
A first step to adding automatic dark mode color scheme switching. Adds a new SCSS file at `color_definitions.scss` that serves to output all SCSS color variables as CSS custom properties. And replaces all SCSS color variables with the new CSS custom properties throughout the stylesheets.
This is an alpha feature at this point, can only be enabled via console using the `default_dark_mode_color_scheme_id` site setting.
Adds 2 factor authentication method via second factor security keys over [web authn](https://developer.mozilla.org/en-US/docs/Web/API/Web_Authentication_API).
Allows a user to authenticate a second factor on login, login-via-email, admin-login, and change password routes. Adds registration area within existing user second factor preferences to register multiple security keys. Supports both external (yubikey) and built-in (macOS/android fingerprint readers).
* SECURITY: Add confirmation screen when logging in via email link
* SECURITY: Add confirmation screen when logging in via user-api OTP
* FIX: Correct translation key in session controller specs
* FIX: Use .email-login class for page
Meghna
Penar Musaraj
Kris
Jordan Vidrine
Joe
Arpit Jalan
David Taylor
Vinoth Kannan
Régis Hanol
Krzysztof Kotlarek
Martin Brennan
Jeff Wong
Neil Lalonde