* Add authentication dialogs for sign in and sign up
- Implemented AuthDialog component to manage sign in and sign up modals.
- Created SignInModal and SignUpModal components for handling respective authentication processes.
- Added AuthFields component for reusable form fields and error handling.
- Updated various views to utilize the new authentication dialogs instead of traditional links.
- Enhanced user experience by allowing sign in and sign up actions to occur without full page reloads.
- Added feature specs for testing the functionality of the new dialogs.
* Refactor modals and input fields for improved accessibility and styling; adjust button sizes and text formatting
* Refactor authentication forms and modals for improved usability and accessibility; integrate reCAPTCHA handling and enhance error messaging
* Refactor SignUpModal layout for improved responsiveness and accessibility; organize fields into rows and enhance styling
* Refactor session view spec to streamline field checks; remove redundant test and retain essential content expectations
We deprecated controller and view specs on the grounds that they were
brittle, and were a poorer measure of user experience than feature
specs. However, feature specs have their own problems: they're much
slower to run, and flakier (see #901). We also ran into a few cases
where feature specs erroneously passed because they were checking for
the presence of a string that occurred in the error page!
Hence, we're cautiously un-deprecating controller and view specs.
Fixes#1132
There's still probably stuff broken, but this seemed like a good spot to
commit. Sorry for the enormous chunk of code. I was attempting to
update the views, but found that I needed to update a few things
elsewhere as well to make them work.