fix(auth): drop the redundant "Continue with" from the Google sign-in button (#6862)

The login and signup social buttons sit under an "Or continue with" divider,
so "Continue with Google" read as "Or continue with Continue with Google" —
and its siblings on the same stack are bare "GitHub" and "Microsoft". Restore
"Google" and hand the icon back to the chip's own leftIcon slot so it picks up
the canonical 16px chipContentIconClass instead of a className size override.

The landing auth modal is a different surface: every button there reads
"Continue with X" (Microsoft, GitHub, email), so its Google label is correct
and stays. Only its icon changes, 20px back to the 18px both siblings use.

apps/sim/app/(auth)/components/social-login-buttons.tsx

@@ -85,12 +85,12 @@ export function SocialLoginButtons({
   const googleButton = (
     <Chip
       fullWidth
-      leftAdornment={<GoogleIcon className='size-[20px] shrink-0' />}
+      leftIcon={GoogleIcon}
       className={cn(AUTH_BUTTON_CLASS, 'border border-[var(--border-1)]')}
       disabled={!googleAvailable || isGoogleLoading}
       onClick={signInWithGoogle}
     >
-      {isGoogleLoading ? 'Connecting…' : 'Continue with Google'}
+      {isGoogleLoading ? 'Connecting…' : 'Google'}
     </Chip>
   )
 

apps/sim/app/(landing)/components/auth-modal/auth-modal.tsx

@@ -202,7 +202,7 @@ export function AuthModal({ children, defaultView = 'login', source }: AuthModal
                     disabled={!!socialLoading}
                     className={SOCIAL_BTN}
                   >
-                    <GoogleIcon className='absolute left-4 size-[20px] shrink-0' />
+                    <GoogleIcon className='absolute left-4 size-[18px] shrink-0' />
                     <span>
                       {socialLoading === 'google' ? 'Connecting...' : 'Continue with Google'}
                     </span>