diff --git a/frontend/src/components/account/CNProviderQuotaCell.vue b/frontend/src/components/account/CNProviderQuotaCell.vue
index 9871a8b48..c9f0f2e90 100644
--- a/frontend/src/components/account/CNProviderQuotaCell.vue
+++ b/frontend/src/components/account/CNProviderQuotaCell.vue
@@ -1,10 +1,14 @@
 <template>
-  <div v-if="visible" class="space-y-1">
+  <div
+    v-if="visible"
+    data-test="cn-provider-quota"
+    class="min-w-[220px] space-y-1"
+  >
     <div class="flex flex-wrap items-center gap-1.5">
       <button
         type="button"
         :class="[
-          'inline-flex items-center gap-0.5 rounded px-1.5 py-0.5 text-[10px] font-medium transition-colors hover:bg-gray-100 disabled:cursor-not-allowed disabled:opacity-50 dark:hover:bg-dark-600',
+          'inline-flex items-center gap-0.5 whitespace-nowrap rounded px-1.5 py-0.5 text-[10px] font-medium leading-4 transition-colors hover:bg-gray-100 disabled:cursor-not-allowed disabled:opacity-50 dark:hover:bg-dark-600',
           platformTextClass(account.platform)
         ]"
         :disabled="loading"
@@ -31,8 +35,18 @@
 
     <!-- Tier rows: 5h + weekly utilization bars -->
     <div v-if="data?.success && data.tiers?.length" class="space-y-1">
-      <div v-for="tier in data.tiers" :key="tier.window" class="flex items-center gap-1.5 text-[10px]">
-        <span class="w-10 shrink-0 text-gray-500 dark:text-gray-400">{{ windowLabel(tier.window) }}</span>
+      <div
+        v-for="tier in data.tiers"
+        :key="tier.window"
+        data-test="cn-provider-quota-tier"
+        class="flex min-w-0 items-center gap-1.5 text-[10px] leading-4"
+      >
+        <span
+          data-test="cn-provider-quota-label"
+          class="w-14 shrink-0 whitespace-nowrap text-gray-500 dark:text-gray-400"
+        >
+          {{ windowLabel(tier.window) }}
+        </span>
         <div class="h-1.5 w-16 shrink-0 overflow-hidden rounded-full bg-gray-200 dark:bg-dark-600">
           <div
             class="h-full rounded-full transition-all"
@@ -43,13 +57,21 @@
         <span :class="['shrink-0 font-medium', utilizationTextColor(tier.used_percent)]">
           {{ Math.round(tier.used_percent) }}%
         </span>
-        <span v-if="tier.reset_at" class="truncate text-gray-400 dark:text-gray-500" :title="tier.reset_at">
+        <span
+          v-if="tier.reset_at"
+          class="min-w-0 truncate text-gray-400 dark:text-gray-500"
+          :title="tier.reset_at"
+        >
           · {{ formatReset(tier.reset_at) }}
         </span>
       </div>
     </div>
 
-    <div v-if="error" class="truncate text-[10px] text-red-600 dark:text-red-400" :title="error">
+    <div
+      v-if="error"
+      class="truncate text-[10px] leading-4 text-red-600 dark:text-red-400"
+      :title="error"
+    >
       {{ truncatedError }}
     </div>
   </div>
diff --git a/frontend/src/components/account/__tests__/CNProviderQuotaCell.spec.ts b/frontend/src/components/account/__tests__/CNProviderQuotaCell.spec.ts
new file mode 100644
index 000000000..20a23585f
--- /dev/null
+++ b/frontend/src/components/account/__tests__/CNProviderQuotaCell.spec.ts
@@ -0,0 +1,76 @@
+import { flushPromises, mount } from '@vue/test-utils'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import CNProviderQuotaCell from '../CNProviderQuotaCell.vue'
+import type { Account } from '@/types'
+
+const { queryQuota } = vi.hoisted(() => ({
+  queryQuota: vi.fn()
+}))
+
+vi.mock('@/api/admin', () => ({
+  adminAPI: {
+    cnProviders: { queryQuota }
+  }
+}))
+
+vi.mock('vue-i18n', () => ({
+  useI18n: () => ({
+    t: (key: string) => key
+  })
+}))
+
+const account = {
+  id: 7,
+  platform: 'zhipu',
+  type: 'apikey',
+  credentials: { account_mode: 'coding' },
+  extra: {
+    zhipu_5h_used_percent: 0,
+    zhipu_weekly_used_percent: 27,
+    zhipu_5h_reset_at: '2026-08-18T12:30:00+08:00',
+    zhipu_weekly_reset_at: '2026-08-22T00:00:00+08:00',
+    zhipu_usage_updated_at: new Date().toISOString()
+  }
+} as Account
+
+describe('CNProviderQuotaCell', () => {
+  beforeEach(() => {
+    queryQuota.mockReset()
+  })
+
+  it('keeps the compact quota stack readable inside the account table cell', async () => {
+    queryQuota.mockResolvedValue({
+      success: true,
+      tiers: [
+        { window: '5h', used_percent: 0, reset_at: '2026-08-18T12:30:00+08:00' },
+        { window: 'weekly', used_percent: 27, reset_at: '2026-08-22T00:00:00+08:00' }
+      ]
+    })
+    const wrapper = mount(CNProviderQuotaCell, { props: { account } })
+
+    const root = wrapper.get('[data-test="cn-provider-quota"]')
+    expect(root.classes()).toContain('min-w-[220px]')
+
+    const probeButton = root.get('button')
+    expect(probeButton.classes()).toContain('whitespace-nowrap')
+    expect(probeButton.classes()).toContain('leading-4')
+    await probeButton.trigger('click')
+    await flushPromises()
+
+    const tiers = root.findAll('[data-test="cn-provider-quota-tier"]')
+    expect(tiers).toHaveLength(2)
+    for (const tier of tiers) {
+      expect(tier.classes()).toContain('min-w-0')
+      expect(tier.classes()).toContain('leading-4')
+    }
+
+    const labels = root.findAll('[data-test="cn-provider-quota-label"]')
+    expect(labels).toHaveLength(2)
+    for (const label of labels) {
+      expect(label.classes()).toContain('w-14')
+      expect(label.classes()).toContain('whitespace-nowrap')
+    }
+
+    expect(queryQuota).toHaveBeenCalledWith(account.id)
+  })
+})