fix(onboarding): match Skip button size to Continue (size="lg")

Skip used the default button size (h-8) while Continue used size="lg"
(h-9), so the two adjacent action buttons rendered visibly different
heights. Promote Skip to size="lg" in step-question and
step-runtime-connect so they line up.

Co-authored-by: multica-agent <github@multica.ai>

packages/views/onboarding/steps/step-question.tsx

@@ -177,7 +177,7 @@ export function StepQuestion({
               {footerHint}
             </span>
             <div className="flex items-center gap-2">
-              <Button variant="secondary" onClick={onSkip}>
+              <Button size="lg" variant="secondary" onClick={onSkip}>
                 {t(($) => $.common.skip)}
               </Button>
               <Button size="lg" disabled={!canContinue} onClick={confirmAdvance}>

packages/views/onboarding/steps/step-runtime-connect.tsx

@@ -281,6 +281,7 @@ function FancyView({
               </span>
               <div className="flex items-center gap-2">
                 <Button
+                  size="lg"
                   variant="secondary"
                   disabled={submitting}
                   onClick={handleSkip}