misc: improved ux by requiring captcha entry before submission

frontend/src/views/Login/components/InitialStep/InitialStep.tsx

@@ -141,6 +141,7 @@ export const InitialStep = ({ setStep, email, setEmail, password, setPassword }:
       captchaRef.current.resetCaptcha();
     }
 
+    setCaptchaToken("");
     setIsLoading(false);
   };
 
@@ -274,6 +275,7 @@ export const InitialStep = ({ setStep, email, setEmail, password, setPassword }:
       )}
       <div className="mt-3 w-1/4 min-w-[21.2rem] rounded-md text-center md:min-w-[20.1rem] lg:w-1/6">
         <Button
+          disabled={shouldShowCaptcha && captchaToken === ""}
           type="submit"
           size="sm"
           isFullWidth

frontend/src/views/Login/components/PasswordStep/PasswordStep.tsx

@@ -180,6 +180,7 @@ export const PasswordStep = ({
     if (captchaRef.current) {
       captchaRef.current.resetCaptcha();
     }
+    setCaptchaToken("");
   };
 
   return (
@@ -223,6 +224,7 @@ export const PasswordStep = ({
       )}
       <div className="mx-auto mt-4 flex w-1/4 w-full min-w-[22rem] items-center justify-center rounded-md text-center lg:w-1/6">
         <Button
+          disabled={shouldShowCaptcha && captchaToken === ""}
           type="submit"
           colorSchema="primary"
           variant="outline_bg"