diff --git a/frontend/src/components/layout/AppHeader.vue b/frontend/src/components/layout/AppHeader.vue
index ab94ab9467..aba0ba595f 100644
--- a/frontend/src/components/layout/AppHeader.vue
+++ b/frontend/src/components/layout/AppHeader.vue
@@ -1,8 +1,8 @@
 <template>
   <header class="glass sticky top-0 z-30 border-b border-gray-200/50 dark:border-dark-700/50">
-    <div class="flex h-16 items-center justify-between px-4 md:px-6">
+    <div class="flex h-16 items-center justify-between gap-2 px-2 sm:px-4 md:px-6">
       <!-- Left: Mobile Menu Toggle + Page Title -->
-      <div class="flex items-center gap-4">
+      <div class="flex shrink-0 items-center gap-2 sm:gap-4">
         <button
           @click="toggleMobileSidebar"
           class="btn-ghost btn-icon lg:hidden"
@@ -22,7 +22,7 @@
       </div>
 
       <!-- Right: Announcements + Docs + Language + Subscriptions + Balance + User Dropdown -->
-      <div class="flex items-center gap-3">
+      <div class="flex min-w-0 items-center gap-1 sm:gap-3">
         <!-- Announcement Bell -->
         <AnnouncementBell v-if="user" />
 
@@ -32,7 +32,7 @@
           :href="docUrl"
           target="_blank"
           rel="noopener noreferrer"
-          class="flex items-center gap-1.5 rounded-lg px-2.5 py-1.5 text-sm font-medium text-gray-600 transition-colors hover:bg-gray-100 hover:text-gray-900 dark:text-dark-400 dark:hover:bg-dark-800 dark:hover:text-white"
+          class="hidden items-center gap-1.5 rounded-lg px-2.5 py-1.5 text-sm font-medium text-gray-600 transition-colors hover:bg-gray-100 hover:text-gray-900 dark:text-dark-400 dark:hover:bg-dark-800 dark:hover:text-white sm:flex"
         >
           <Icon name="book" size="sm" />
           <span class="hidden sm:inline">{{ t('nav.docs') }}</span>
diff --git a/frontend/src/views/admin/ops/components/OpsThroughputTrendChart.vue b/frontend/src/views/admin/ops/components/OpsThroughputTrendChart.vue
index 5707cc3b35..a5fba1a401 100644
--- a/frontend/src/views/admin/ops/components/OpsThroughputTrendChart.vue
+++ b/frontend/src/views/admin/ops/components/OpsThroughputTrendChart.vue
@@ -173,22 +173,28 @@ function downloadChart() {
 </script>
 
 <template>
-  <div class="flex h-full flex-col rounded-3xl bg-white p-6 shadow-sm ring-1 ring-gray-900/5 dark:bg-dark-800 dark:ring-dark-700">
-    <div class="mb-4 flex shrink-0 items-center justify-between">
-      <h3 class="flex items-center gap-2 text-sm font-bold text-gray-900 dark:text-white">
+  <div class="flex h-full min-w-0 flex-col rounded-3xl bg-white p-6 shadow-sm ring-1 ring-gray-900/5 dark:bg-dark-800 dark:ring-dark-700">
+    <div
+      data-testid="throughput-chart-header"
+      class="mb-4 flex shrink-0 flex-col gap-3 sm:flex-row sm:items-center sm:justify-between"
+    >
+      <h3 class="flex min-w-0 items-center gap-2 text-sm font-bold text-gray-900 dark:text-white">
         <svg class="h-4 w-4 text-blue-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
           <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 7h8m0 0v8m0-8l-8 8-4-4-6 6" />
         </svg>
         {{ t('admin.ops.throughputTrend') }}
         <HelpTooltip v-if="!props.fullscreen" :content="t('admin.ops.tooltips.throughputTrend')" />
       </h3>
-      <div class="flex items-center gap-2 text-xs text-gray-500 dark:text-gray-400">
-        <span class="flex items-center gap-1"><span class="h-2 w-2 rounded-full bg-blue-500"></span>QPS</span>
-        <span class="flex items-center gap-1"><span class="h-2 w-2 rounded-full bg-green-500"></span>{{ t('admin.ops.tpsK') }}</span>
+      <div
+        data-testid="throughput-chart-toolbar"
+        class="flex w-full min-w-0 flex-wrap items-center gap-2 text-xs text-gray-500 dark:text-gray-400 sm:w-auto sm:justify-end"
+      >
+        <span class="flex shrink-0 items-center gap-1"><span class="h-2 w-2 rounded-full bg-blue-500"></span>QPS</span>
+        <span class="flex shrink-0 items-center gap-1"><span class="h-2 w-2 rounded-full bg-green-500"></span>{{ t('admin.ops.tpsK') }}</span>
         <template v-if="!props.fullscreen">
           <button
             type="button"
-            class="ml-2 inline-flex items-center rounded-lg border border-gray-200 bg-white px-2 py-1 text-[11px] font-semibold text-gray-600 hover:bg-gray-50 disabled:opacity-50 dark:border-dark-700 dark:bg-dark-900 dark:text-gray-300 dark:hover:bg-dark-800"
+            class="inline-flex shrink-0 items-center rounded-lg border border-gray-200 bg-white px-2 py-1 text-[11px] font-semibold text-gray-600 hover:bg-gray-50 disabled:opacity-50 dark:border-dark-700 dark:bg-dark-900 dark:text-gray-300 dark:hover:bg-dark-800"
             :disabled="state !== 'ready'"
             :title="t('admin.ops.requestDetails.title')"
             @click="emit('openDetails')"
@@ -197,7 +203,7 @@ function downloadChart() {
           </button>
           <button
             type="button"
-            class="ml-2 inline-flex items-center rounded-lg border border-gray-200 bg-white px-2 py-1 text-[11px] font-semibold text-gray-600 hover:bg-gray-50 disabled:opacity-50 dark:border-dark-700 dark:bg-dark-900 dark:text-gray-300 dark:hover:bg-dark-800"
+            class="inline-flex shrink-0 items-center rounded-lg border border-gray-200 bg-white px-2 py-1 text-[11px] font-semibold text-gray-600 hover:bg-gray-50 disabled:opacity-50 dark:border-dark-700 dark:bg-dark-900 dark:text-gray-300 dark:hover:bg-dark-800"
             :disabled="state !== 'ready'"
             :title="t('admin.ops.charts.resetZoomHint')"
             @click="resetZoom"
@@ -206,7 +212,7 @@ function downloadChart() {
           </button>
           <button
             type="button"
-            class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-2 py-1 text-[11px] font-semibold text-gray-600 hover:bg-gray-50 disabled:opacity-50 dark:border-dark-700 dark:bg-dark-900 dark:text-gray-300 dark:hover:bg-dark-800"
+            class="inline-flex shrink-0 items-center rounded-lg border border-gray-200 bg-white px-2 py-1 text-[11px] font-semibold text-gray-600 hover:bg-gray-50 disabled:opacity-50 dark:border-dark-700 dark:bg-dark-900 dark:text-gray-300 dark:hover:bg-dark-800"
             :disabled="state !== 'ready'"
             :title="t('admin.ops.charts.downloadChartHint')"
             @click="downloadChart"
@@ -244,7 +250,7 @@ function downloadChart() {
       </button>
     </div>
 
-    <div class="min-h-0 flex-1">
+    <div class="min-h-0 min-w-0 flex-1">
       <Line v-if="state === 'ready' && chartData" ref="throughputChartRef" :data="chartData" :options="options" />
       <div v-else class="flex h-full items-center justify-center">
         <div v-if="state === 'loading'" class="animate-pulse text-sm text-gray-400">{{ t('common.loading') }}</div>
diff --git a/frontend/src/views/admin/ops/components/__tests__/OpsThroughputTrendChart.spec.ts b/frontend/src/views/admin/ops/components/__tests__/OpsThroughputTrendChart.spec.ts
new file mode 100644
index 0000000000..87063e9856
--- /dev/null
+++ b/frontend/src/views/admin/ops/components/__tests__/OpsThroughputTrendChart.spec.ts
@@ -0,0 +1,50 @@
+import { describe, expect, it, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+
+import OpsThroughputTrendChart from '../OpsThroughputTrendChart.vue'
+
+vi.mock('vue-i18n', async () => {
+  const actual = await vi.importActual<typeof import('vue-i18n')>('vue-i18n')
+  return {
+    ...actual,
+    useI18n: () => ({
+      t: (key: string) => key,
+    }),
+  }
+})
+
+vi.mock('vue-chartjs', () => ({
+  Line: {
+    props: ['data', 'options'],
+    template: '<div class="line-chart" />',
+  },
+}))
+
+describe('OpsThroughputTrendChart', () => {
+  it('allows the header controls to wrap on narrow screens', () => {
+    const wrapper = mount(OpsThroughputTrendChart, {
+      props: {
+        points: [],
+        loading: false,
+        timeRange: '1h',
+      },
+      global: {
+        stubs: {
+          EmptyState: true,
+          HelpTooltip: true,
+        },
+      },
+    })
+
+    const header = wrapper.get('[data-testid="throughput-chart-header"]')
+    expect(header.classes()).toEqual(expect.arrayContaining(['flex-col', 'sm:flex-row']))
+
+    const toolbar = wrapper.get('[data-testid="throughput-chart-toolbar"]')
+    expect(toolbar.classes()).toEqual(expect.arrayContaining(['w-full', 'flex-wrap', 'sm:w-auto']))
+    expect(toolbar.findAll('button')).toHaveLength(3)
+    toolbar.findAll('button').forEach((button) => {
+      expect(button.classes()).toContain('shrink-0')
+      expect(button.classes()).not.toContain('ml-2')
+    })
+  })
+})