diff --git a/frontend/src/views/apps/RadioApp.contract.test.ts b/frontend/src/views/apps/RadioApp.contract.test.ts
new file mode 100644
index 0000000..7cba1fa
--- /dev/null
+++ b/frontend/src/views/apps/RadioApp.contract.test.ts
@@ -0,0 +1,91 @@
+import { readFileSync } from 'node:fs'
+
+import { describe, expect, it } from 'vitest'
+
+const source = readFileSync(new URL('./RadioApp.vue', import.meta.url), 'utf8')
+const navigationSource = source.slice(
+  source.indexOf('<SkyPillNavigation'),
+  source.indexOf('</SkyPillNavigation>') + '</SkyPillNavigation>'.length,
+)
+
+describe('RadioApp Sky UI contract', () => {
+  it('uses only the first-party Sky UI surface', () => {
+    expect(source).not.toContain("from 'konsta/vue'")
+    expect(source).not.toMatch(/<\/?k-[a-z]/)
+    expect(source).toContain('<SkyAppPage')
+    expect(source).toContain('<SkyNavbar')
+    expect(source).toContain('<SkyPillNavigation')
+    expect(source.match(/<SkyScrollArea\b/g)).toHaveLength(1)
+    expect(source).toContain('<SkyStatusCard')
+    expect(source).toContain('<SkyField')
+    expect(source).toContain('<SkyRange')
+    expect(source).toContain('<SkySettingsGroup')
+    expect(source).toContain('<SkySettingsRow')
+    expect(source).toContain('<SkyToast')
+  })
+
+  it('renders Radio and Settings in full-width bottom Glass navigation', () => {
+    expect(navigationSource).toContain('layout="full"')
+    expect(navigationSource).toContain('<SkySegmented')
+    expect(navigationSource).toContain('navigation')
+    expect(navigationSource).toContain('rounded')
+    expect(navigationSource).toContain('strong')
+    expect(navigationSource).toContain(
+      ':active-index="tab === \'radio\' ? 0 : 1"',
+    )
+    expect(navigationSource).toContain(':data-active-tab="tab"')
+    expect(navigationSource).toContain(':item-count="2"')
+    expect(navigationSource.match(/<SkySegmentedButton\b/g)).toHaveLength(2)
+    expect(navigationSource).toContain("tab = 'radio'")
+    expect(navigationSource).toContain("tab = 'settings'")
+    expect(navigationSource).toContain(
+      ':aria-label="phone.t(\'Apps.radio.tabs.radio\')"',
+    )
+    expect(navigationSource).toContain(
+      ':aria-label="phone.t(\'Apps.radio.tabs.settings\')"',
+    )
+    expect(navigationSource.match(/:size="20"/g)).toHaveLength(2)
+    expect(navigationSource).not.toContain('compact')
+    expect(source).toContain(
+      '<SkyScrollArea class="radio-content" with-tabbar>',
+    )
+    expect(source.indexOf('</SkyScrollArea>')).toBeLessThan(
+      source.indexOf('<SkyPillNavigation'),
+    )
+    expect(source).not.toMatch(/\.radio-content\s*\{[^}]*padding-bottom\s*:/s)
+    expect(source).not.toContain('<template #subnavbar>')
+    expect(source).not.toContain('radio-tab-switcher')
+    expect(source).toMatch(
+      /\.radio-navigation__item > span:last-child\s*\{[^}]*text-overflow:\s*ellipsis[^}]*white-space:\s*nowrap/s,
+    )
+  })
+
+  it('keeps the Radio actions, hydration and trusted updates wired', () => {
+    expect(source).toContain('await radio.load()')
+    expect(source).toContain('await radio.connect(primary, secondary)')
+    expect(source).toContain('await radio.disconnect()')
+    expect(source).toContain('void radio.setVolume(volumeInput.value)')
+    expect(source).toContain("radio.saveSetting('autoRejoin', $event)")
+    expect(source).toContain("radio.saveSetting('notifications', $event)")
+    expect(source).toContain('await radio.saveDisplayName(displayName)')
+    expect(source).toContain('await radio.saveBadge(badge)')
+    expect(source).toContain('isTrustedRootMessageSource(event.source, window)')
+    expect(source).toContain("event.data?.type === 'radio:updated'")
+    expect(source).toContain('radio.updateMembers(event.data.data.members)')
+    expect(source).toContain("window.addEventListener('message', onMessage)")
+    expect(source).toContain("window.removeEventListener('message', onMessage)")
+    expect(source).toContain("value.replace(',', '.')")
+    expect(source).toContain('connectHistory(entry)')
+  })
+
+  it('preserves theme, labels, loading, empty, error and feedback states', () => {
+    expect(source).toContain(':dark="phone.isDarkMode"')
+    expect(source).toContain(':label="phone.t(\'Apps.radio.name\')"')
+    expect(source).toContain('radio.isLoading && !radio.data.provider')
+    expect(source).toContain('<span aria-hidden="true">')
+    expect(source).toContain('<SkyEmptyState')
+    expect(source).toContain('role="alert"')
+    expect(source).toContain(':opened="Boolean(feedback)"')
+    expect(source).toContain('vertical-position="center"')
+  })
+})
diff --git a/frontend/src/views/apps/RadioApp.vue b/frontend/src/views/apps/RadioApp.vue
index 61df41b..2b40d22 100644
--- a/frontend/src/views/apps/RadioApp.vue
+++ b/frontend/src/views/apps/RadioApp.vue
@@ -20,6 +20,7 @@ import {
   SkyList,
   SkyListItem,
   SkyNavbar,
+  SkyPillNavigation,
   SkyRange,
   SkyScrollArea,
   SkySection,
@@ -228,26 +229,10 @@ onBeforeUnmount(() => {
   >
     <SkyNavbar :title="phone.t('Apps.radio.name')" />
 
-    <div class="radio-tab-switcher">
-      <SkySegmented class="radio-tabs" :aria-label="phone.t('Apps.radio.name')">
-        <SkySegmentedButton :active="tab === 'radio'" @click="tab = 'radio'">
-          <RadioTower :size="16" aria-hidden="true" />
-          {{ phone.t('Apps.radio.tabs.radio') }}
-        </SkySegmentedButton>
-        <SkySegmentedButton
-          :active="tab === 'settings'"
-          @click="tab = 'settings'"
-        >
-          <Settings :size="16" aria-hidden="true" />
-          {{ phone.t('Apps.radio.tabs.settings') }}
-        </SkySegmentedButton>
-      </SkySegmented>
-    </div>
-
-    <SkyScrollArea class="radio-content">
+    <SkyScrollArea class="radio-content" with-tabbar>
       <div v-if="radio.isLoading && !radio.data.provider" class="radio-loading">
         <SkySpinner :label="phone.t('Common.loading')" />
-        <span>{{ phone.t('Common.loading') }}</span>
+        <span aria-hidden="true">{{ phone.t('Common.loading') }}</span>
       </div>
 
       <template v-else-if="tab === 'radio'">
@@ -453,6 +438,45 @@ onBeforeUnmount(() => {
       </template>
     </SkyScrollArea>
 
+    <SkyPillNavigation
+      class="radio-navigation"
+      layout="full"
+      :label="phone.t('Apps.radio.name')"
+    >
+      <SkySegmented
+        navigation
+        rounded
+        strong
+        :active-index="tab === 'radio' ? 0 : 1"
+        :aria-label="phone.t('Apps.radio.name')"
+        :data-active-tab="tab"
+        :item-count="2"
+      >
+        <SkySegmentedButton
+          :active="tab === 'radio'"
+          :aria-label="phone.t('Apps.radio.tabs.radio')"
+          type="button"
+          @click="tab = 'radio'"
+        >
+          <span class="radio-navigation__item">
+            <RadioTower :size="20" aria-hidden="true" />
+            <span>{{ phone.t('Apps.radio.tabs.radio') }}</span>
+          </span>
+        </SkySegmentedButton>
+        <SkySegmentedButton
+          :active="tab === 'settings'"
+          :aria-label="phone.t('Apps.radio.tabs.settings')"
+          type="button"
+          @click="tab = 'settings'"
+        >
+          <span class="radio-navigation__item">
+            <Settings :size="20" aria-hidden="true" />
+            <span>{{ phone.t('Apps.radio.tabs.settings') }}</span>
+          </span>
+        </SkySegmentedButton>
+      </SkySegmented>
+    </SkyPillNavigation>
+
     <SkyToast
       :opened="Boolean(feedback)"
       position="center"
@@ -465,13 +489,21 @@ onBeforeUnmount(() => {
 </template>
 
 <style scoped>
-.radio-tab-switcher {
-  padding: 4px var(--sky-page-gutter) 8px;
-  flex: none;
+.radio-navigation__item {
+  min-width: 0;
+  max-width: 100%;
+  display: flex;
+  align-items: center;
+  flex-direction: column;
+  gap: 2px;
+  line-height: 1;
 }
 
-.radio-tabs :deep(.sky-segmented-button) {
-  gap: 6px;
+.radio-navigation__item > span:last-child {
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .radio-content {