Frontend to allow changing email during signup

app/web/features/auth/locales/en.json

@@ -8,6 +8,13 @@
     "hide_current_password": "Hide current password",
     "show_current_password": "Show current password"
   },
+  "change_signup_email_form": {
+    "title": "Change signup email",
+    "current_email_message": "Your email address is currently <strong>{{email}}</strong>.",
+    "success_message": "Your email change has been received. Check your new email to confirm your email.",
+    "new_email": "Changed email address",
+    "signup_change_email": "Change your email address"
+  },
   "do_not_email": {
     "title": "Do not email me",
     "status": {
@@ -176,7 +183,9 @@
   "sign_up_need_verification_title": "One last thing: confirm your email.",
   "sign_up_resend_verification_email_help": "Didn't receive the email? Click <resendLink>here to resend the verification link</resendLink>.",
   "sign_up_resend_verification_done": "Done! We've sent you another email.",
-  "sign_up_completed_prompt": "We have sent an email with a verification link to your email address. Please click the link to activate your account.",
+  "sign_up_change_email": "Mistyped your email address? Enter your correct email address here:",
+  "sign_up_completed_prompt": "We have sent an email with a verification link to your email address: <strong>{{providedEmailAddress}}</strong>. Please click the link to activate your account.",
+  "sign_up_completed_prompt_noemail": "We have sent an email with a verification link to your email address. Please click the link to activate your account.",
   "sign_up_confirmed_prompt": "You're all done! If you are not redirected, try logging in.",
   "unhandled_sign_up_state": "Error: unhandled signup flow state.",
   "login_prompt": "Click here to log in",

app/web/features/auth/signup/BasicForm.tsx

@@ -45,6 +45,7 @@ export default function BasicForm({ submitText, successCallback, inviteCode }: B
     mutationFn: async (data) => {
       const sanitizedEmail = lowercaseAndTrimField(data.email);
       const sanitizedName = data.name.trim();
+      authActions.assignSignupEmail(sanitizedEmail);
       const state = await service.auth.startSignup(sanitizedName, sanitizedEmail, inviteCode);
       doAntibot("signup");
       return authActions.updateSignupState(state);