fix: tighten spacing between VAD enable checkbox and mode radio buttons

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/settings/SettingsModal.tsx

@@ -357,7 +357,7 @@ export const SettingsModal: FC<Props> = ({
           </FieldRow>
           {vadActive && (
             <>
-              <Form>
+              <Form style={{ marginTop: "-16px" }}>
                 <InlineField
                   name={vadModeRadioGroup}
                   control={
@@ -385,7 +385,7 @@ export const SettingsModal: FC<Props> = ({
                   <HelpMessage>160 samples / 10 ms — lowest possible latency.</HelpMessage>
                 </InlineField>
               </Form>
-              <div className={`${styles.volumeSlider} ${styles.thresholdSlider}`}>
+              <div style={{ marginTop: "16px" }} className={`${styles.volumeSlider} ${styles.thresholdSlider}`}>
                 <span className={styles.sliderLabel}>Open threshold: {Math.round(vadPositiveThresholdRaw * 100)}%</span>
                 <p>How confident the model must be before opening the gate.</p>
                 <Slider