diff --git a/frontend-modern/src/features/alerts/AlertCooldownSection.tsx b/frontend-modern/src/features/alerts/AlertCooldownSection.tsx
index cab1b86672..676176a838 100644
--- a/frontend-modern/src/features/alerts/AlertCooldownSection.tsx
+++ b/frontend-modern/src/features/alerts/AlertCooldownSection.tsx
@@ -1,11 +1,6 @@
-import { Show } from 'solid-js';
+import { Show, createUniqueId } from 'solid-js';
 
-import {
-  controlClass,
-  formHelpText,
-  formField,
-  labelClass,
-} from '@/components/shared/Form';
+import { controlClass, formHelpText, formField, labelClass } from '@/components/shared/Form';
 import { SettingsPanel } from '@/components/shared/SettingsPanel';
 import { Toggle } from '@/components/shared/Toggle';
 import {
@@ -30,6 +25,12 @@ interface AlertCooldownSectionProps {
 }
 
 export function AlertCooldownSection(props: AlertCooldownSectionProps) {
+  const fieldIdPrefix = `alert-cooldown-${createUniqueId()}`;
+  const fieldIds = {
+    minutes: `${fieldIdPrefix}-minutes`,
+    maxAlerts: `${fieldIdPrefix}-max-alerts`,
+  };
+
   return (
     <SettingsPanel
       title={ALERT_CONFIG_COOLDOWN_TITLE}
@@ -53,11 +54,15 @@ export function AlertCooldownSection(props: AlertCooldownSectionProps) {
         <div class="space-y-4">
           <div class="grid grid-cols-1 gap-4 sm:grid-cols-2">
             <div class={formField}>
-              <label class={labelClass('text-xs uppercase tracking-[0.08em]')}>
+              <label
+                for={fieldIds.minutes}
+                class={labelClass('text-xs uppercase tracking-[0.08em]')}
+              >
                 {ALERT_CONFIG_COOLDOWN_PERIOD_LABEL}
               </label>
               <div class="relative">
                 <input
+                  id={fieldIds.minutes}
                   type="number"
                   min="5"
                   max="120"
@@ -73,11 +78,15 @@ export function AlertCooldownSection(props: AlertCooldownSectionProps) {
             </div>
 
             <div class={formField}>
-              <label class={labelClass('text-xs uppercase tracking-[0.08em]')}>
+              <label
+                for={fieldIds.maxAlerts}
+                class={labelClass('text-xs uppercase tracking-[0.08em]')}
+              >
                 {ALERT_CONFIG_COOLDOWN_MAX_ALERTS_LABEL}
               </label>
               <div class="relative">
                 <input
+                  id={fieldIds.maxAlerts}
                   type="number"
                   min="1"
                   max="10"
diff --git a/frontend-modern/src/features/alerts/AlertEscalationSection.tsx b/frontend-modern/src/features/alerts/AlertEscalationSection.tsx
index d356f341ae..d09c0dd907 100644
--- a/frontend-modern/src/features/alerts/AlertEscalationSection.tsx
+++ b/frontend-modern/src/features/alerts/AlertEscalationSection.tsx
@@ -1,4 +1,4 @@
-import { For, Show } from 'solid-js';
+import { For, Show, createUniqueId } from 'solid-js';
 
 import { controlClass, formHelpText } from '@/components/shared/Form';
 import { FormSelect } from '@/components/shared/FormSelect';
@@ -29,6 +29,8 @@ interface AlertEscalationSectionProps {
 }
 
 export function AlertEscalationSection(props: AlertEscalationSectionProps) {
+  const fieldIdPrefix = `alert-escalation-${createUniqueId()}`;
+
   return (
     <SettingsPanel
       title={ALERT_CONFIG_ESCALATION_TITLE}
@@ -52,64 +54,73 @@ export function AlertEscalationSection(props: AlertEscalationSectionProps) {
         <div class="space-y-3">
           <p class={formHelpText}>{getAlertConfigEscalationHelp()}</p>
           <For each={props.escalation.levels}>
-            {(level, index) => (
-              <div class="flex items-center gap-3 rounded-md border border-border bg-surface-hover p-3">
-                <div class="flex flex-1 flex-col gap-3 sm:grid sm:grid-cols-2 sm:items-center sm:gap-2">
-                  <div class="flex items-center gap-2">
-                    <span class="text-xs font-medium text-muted">
-                      {ALERT_CONFIG_ESCALATION_AFTER_LABEL}
-                    </span>
-                    <input
-                      type="number"
-                      min="5"
-                      max="180"
-                      value={level.after}
+            {(level, index) => {
+              const afterId = () => `${fieldIdPrefix}-after-${index()}`;
+              const notifyId = () => `${fieldIdPrefix}-notify-${index()}`;
+
+              return (
+                <div class="flex items-center gap-3 rounded-md border border-border bg-surface-hover p-3">
+                  <div class="flex flex-1 flex-col gap-3 sm:grid sm:grid-cols-2 sm:items-center sm:gap-2">
+                    <div class="flex items-center gap-2">
+                      <label for={afterId()} class="text-xs font-medium text-muted">
+                        {ALERT_CONFIG_ESCALATION_AFTER_LABEL}
+                      </label>
+                      <input
+                        id={afterId()}
+                        type="number"
+                        min="5"
+                        max="180"
+                        value={level.after}
+                        onChange={(event) =>
+                          props.setEscalationAfter(index(), event.currentTarget.value)
+                        }
+                        class={`${controlClass('px-2 py-1 text-sm')} w-20`}
+                      />
+                      <span class="text-xs text-muted">
+                        {ALERT_CONFIG_ESCALATION_MINUTES_SUFFIX}
+                      </span>
+                    </div>
+                    <FormSelect
+                      id={notifyId()}
+                      label={ALERT_CONFIG_ESCALATION_NOTIFY_LABEL}
+                      value={level.notify}
                       onChange={(event) =>
-                        props.setEscalationAfter(index(), event.currentTarget.value)
+                        props.setEscalationNotify(
+                          index(),
+                          event.currentTarget.value as EscalationNotifyTarget,
+                        )
                       }
-                      class={`${controlClass('px-2 py-1 text-sm')} w-20`}
-                    />
-                    <span class="text-xs text-muted">{ALERT_CONFIG_ESCALATION_MINUTES_SUFFIX}</span>
+                      fieldBaseClass="flex"
+                      fieldClass="items-center gap-2"
+                      labelClass="text-xs font-medium text-muted"
+                      selectBaseClass={`${controlClass('px-2 py-1 text-sm')} flex-1`}
+                    >
+                      <option value="email">{getAlertConfigEscalationNotifyLabel('email')}</option>
+                      <option value="webhook">
+                        {getAlertConfigEscalationNotifyLabel('webhook')}
+                      </option>
+                      <option value="all">{getAlertConfigEscalationNotifyLabel('all')}</option>
+                    </FormSelect>
                   </div>
-                  <FormSelect
-                    id={`alert-escalation-notify-${index()}`}
-                    label={ALERT_CONFIG_ESCALATION_NOTIFY_LABEL}
-                    value={level.notify}
-                    onChange={(event) =>
-                      props.setEscalationNotify(
-                        index(),
-                        event.currentTarget.value as EscalationNotifyTarget,
-                      )
-                    }
-                    fieldBaseClass="flex"
-                    fieldClass="items-center gap-2"
-                    labelClass="text-xs font-medium text-muted"
-                    selectBaseClass={`${controlClass('px-2 py-1 text-sm')} flex-1`}
+                  <button
+                    type="button"
+                    onClick={() => props.removeEscalationLevel(index())}
+                    class="rounded-md p-1.5 text-red-600 transition-colors hover:bg-red-100 dark:hover:bg-red-900"
+                    title={ALERT_CONFIG_ESCALATION_REMOVE_TITLE}
+                    aria-label={ALERT_CONFIG_ESCALATION_REMOVE_TITLE}
                   >
-                    <option value="email">{getAlertConfigEscalationNotifyLabel('email')}</option>
-                    <option value="webhook">
-                      {getAlertConfigEscalationNotifyLabel('webhook')}
-                    </option>
-                    <option value="all">{getAlertConfigEscalationNotifyLabel('all')}</option>
-                  </FormSelect>
+                    <svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                      <path
+                        stroke-linecap="round"
+                        stroke-linejoin="round"
+                        stroke-width="2"
+                        d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
+                      />
+                    </svg>
+                  </button>
                 </div>
-                <button
-                  type="button"
-                  onClick={() => props.removeEscalationLevel(index())}
-                  class="rounded-md p-1.5 text-red-600 transition-colors hover:bg-red-100 dark:hover:bg-red-900"
-                  title={ALERT_CONFIG_ESCALATION_REMOVE_TITLE}
-                >
-                  <svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                    <path
-                      stroke-linecap="round"
-                      stroke-linejoin="round"
-                      stroke-width="2"
-                      d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
-                    />
-                  </svg>
-                </button>
-              </div>
-            )}
+              );
+            }}
           </For>
 
           <button
diff --git a/frontend-modern/src/features/alerts/AlertGroupingSection.tsx b/frontend-modern/src/features/alerts/AlertGroupingSection.tsx
index 0250e86c2e..6cfdf8745d 100644
--- a/frontend-modern/src/features/alerts/AlertGroupingSection.tsx
+++ b/frontend-modern/src/features/alerts/AlertGroupingSection.tsx
@@ -1,10 +1,6 @@
-import { Show } from 'solid-js';
+import { Show, createUniqueId } from 'solid-js';
 
-import {
-  formHelpText,
-  formField,
-  labelClass,
-} from '@/components/shared/Form';
+import { formHelpText, formField, labelClass } from '@/components/shared/Form';
 import { SettingsPanel } from '@/components/shared/SettingsPanel';
 import { Toggle } from '@/components/shared/Toggle';
 import {
@@ -33,6 +29,11 @@ interface AlertGroupingSectionProps {
 }
 
 export function AlertGroupingSection(props: AlertGroupingSectionProps) {
+  const fieldIdPrefix = `alert-grouping-${createUniqueId()}`;
+  const fieldIds = {
+    window: `${fieldIdPrefix}-window`,
+  };
+
   return (
     <SettingsPanel
       title={ALERT_CONFIG_GROUPING_TITLE}
@@ -55,15 +56,17 @@ export function AlertGroupingSection(props: AlertGroupingSectionProps) {
       <Show when={props.grouping.enabled}>
         <div class="space-y-4">
           <div class={formField}>
-            <label class={labelClass('text-xs uppercase tracking-[0.08em]')}>
+            <label for={fieldIds.window} class={labelClass('text-xs uppercase tracking-[0.08em]')}>
               {ALERT_CONFIG_GROUPING_WINDOW_LABEL}
             </label>
             <div class="flex items-center gap-3">
               <input
+                id={fieldIds.window}
                 type="range"
                 min="0"
                 max="30"
                 value={props.grouping.window}
+                aria-valuetext={`${props.grouping.window} minutes`}
                 onChange={(event) => props.setGroupingWindow(event.currentTarget.value)}
                 class="flex-1"
               />
diff --git a/frontend-modern/src/features/alerts/AlertQuietHoursSection.tsx b/frontend-modern/src/features/alerts/AlertQuietHoursSection.tsx
index 42abd45bb3..19deb7efec 100644
--- a/frontend-modern/src/features/alerts/AlertQuietHoursSection.tsx
+++ b/frontend-modern/src/features/alerts/AlertQuietHoursSection.tsx
@@ -1,4 +1,4 @@
-import { For, Show } from 'solid-js';
+import { For, Show, createUniqueId } from 'solid-js';
 
 import { controlClass, formField, labelClass } from '@/components/shared/Form';
 import { FormSelect } from '@/components/shared/FormSelect';
@@ -40,6 +40,12 @@ interface AlertQuietHoursSectionProps {
 }
 
 export function AlertQuietHoursSection(props: AlertQuietHoursSectionProps) {
+  const fieldIdPrefix = `alert-quiet-hours-${createUniqueId()}`;
+  const fieldIds = {
+    start: `${fieldIdPrefix}-start`,
+    end: `${fieldIdPrefix}-end`,
+  };
+
   return (
     <SettingsPanel
       title={ALERT_CONFIG_QUIET_HOURS_TITLE}
@@ -63,10 +69,11 @@ export function AlertQuietHoursSection(props: AlertQuietHoursSectionProps) {
         <div class="space-y-4">
           <div class="grid grid-cols-1 gap-4 sm:grid-cols-3">
             <div class={formField}>
-              <label class={labelClass('text-xs uppercase tracking-[0.08em]')}>
+              <label for={fieldIds.start} class={labelClass('text-xs uppercase tracking-[0.08em]')}>
                 {ALERT_CONFIG_QUIET_HOURS_START_TIME_LABEL}
               </label>
               <input
+                id={fieldIds.start}
                 type="time"
                 value={props.quietHours.start}
                 onChange={(event) => props.setQuietHoursStart(event.currentTarget.value)}
@@ -74,10 +81,11 @@ export function AlertQuietHoursSection(props: AlertQuietHoursSectionProps) {
               />
             </div>
             <div class={formField}>
-              <label class={labelClass('text-xs uppercase tracking-[0.08em]')}>
+              <label for={fieldIds.end} class={labelClass('text-xs uppercase tracking-[0.08em]')}>
                 {ALERT_CONFIG_QUIET_HOURS_END_TIME_LABEL}
               </label>
               <input
+                id={fieldIds.end}
                 type="time"
                 value={props.quietHours.end}
                 onChange={(event) => props.setQuietHoursEnd(event.currentTarget.value)}
@@ -109,6 +117,8 @@ export function AlertQuietHoursSection(props: AlertQuietHoursSectionProps) {
                     type="button"
                     onClick={() => props.toggleQuietDay(day.id)}
                     title={day.fullLabel}
+                    aria-label={day.fullLabel}
+                    aria-pressed={props.quietHours.days[day.id]}
                     class={getAlertQuietDayButtonClass(props.quietHours.days[day.id])}
                   >
                     {day.label}
diff --git a/frontend-modern/src/features/alerts/AlertScheduleSections.test.tsx b/frontend-modern/src/features/alerts/AlertScheduleSections.test.tsx
new file mode 100644
index 0000000000..50aa0a8e50
--- /dev/null
+++ b/frontend-modern/src/features/alerts/AlertScheduleSections.test.tsx
@@ -0,0 +1,126 @@
+import { cleanup, render, screen } from '@solidjs/testing-library';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { AlertCooldownSection } from './AlertCooldownSection';
+import { AlertEscalationSection } from './AlertEscalationSection';
+import { AlertGroupingSection } from './AlertGroupingSection';
+import { AlertQuietHoursSection } from './AlertQuietHoursSection';
+import type { CooldownConfig, EscalationConfig, GroupingConfig, QuietHoursConfig } from './types';
+
+function makeQuietHours(overrides: Partial<QuietHoursConfig> = {}): QuietHoursConfig {
+  return {
+    enabled: true,
+    start: '22:00',
+    end: '07:00',
+    timezone: 'UTC',
+    days: {
+      monday: true,
+      tuesday: true,
+      wednesday: true,
+      thursday: true,
+      friday: true,
+      saturday: false,
+      sunday: false,
+    },
+    suppress: {
+      performance: true,
+      storage: true,
+      offline: false,
+    },
+    ...overrides,
+  };
+}
+
+describe('Alert schedule sections', () => {
+  afterEach(() => {
+    cleanup();
+  });
+
+  it('associates visible labels with quiet-hours controls', () => {
+    render(() => (
+      <AlertQuietHoursSection
+        quietHours={makeQuietHours()}
+        quietHourSuppressOptions={[
+          { key: 'performance', label: 'Performance', description: 'CPU and memory alerts' },
+          { key: 'storage', label: 'Storage', description: 'Disk alerts' },
+          { key: 'offline', label: 'Offline', description: 'Connectivity alerts' },
+        ]}
+        weekdaysOnly={true}
+        weekendsOnly={false}
+        setQuietHoursEnabled={vi.fn()}
+        setQuietHoursStart={vi.fn()}
+        setQuietHoursEnd={vi.fn()}
+        setQuietHoursTimezone={vi.fn()}
+        toggleQuietDay={vi.fn()}
+        setQuietSuppressCategory={vi.fn()}
+      />
+    ));
+
+    expect(screen.getByLabelText('Start time')).toHaveAttribute('type', 'time');
+    expect(screen.getByLabelText('End time')).toHaveAttribute('type', 'time');
+    expect(screen.getByRole('combobox', { name: 'Timezone' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Monday' })).toHaveAttribute('aria-pressed', 'true');
+    expect(screen.getByRole('button', { name: 'Saturday' })).toHaveAttribute(
+      'aria-pressed',
+      'false',
+    );
+  });
+
+  it('associates visible labels with cooldown controls', () => {
+    const cooldown: CooldownConfig = { enabled: true, minutes: 30, maxAlerts: 3 };
+
+    render(() => (
+      <AlertCooldownSection
+        cooldown={cooldown}
+        setCooldownEnabled={vi.fn()}
+        setCooldownMinutes={vi.fn()}
+        setCooldownMaxAlerts={vi.fn()}
+      />
+    ));
+
+    expect(screen.getByRole('spinbutton', { name: 'Cooldown period' })).toBeInTheDocument();
+    expect(screen.getByRole('spinbutton', { name: 'Max alerts / hour' })).toBeInTheDocument();
+  });
+
+  it('associates visible labels with grouping controls', () => {
+    const grouping: GroupingConfig = { enabled: true, window: 10, byNode: true, byGuest: false };
+
+    render(() => (
+      <AlertGroupingSection
+        grouping={grouping}
+        setGroupingEnabled={vi.fn()}
+        setGroupingWindow={vi.fn()}
+        setGroupingByNode={vi.fn()}
+        setGroupingByGuest={vi.fn()}
+      />
+    ));
+
+    expect(screen.getByRole('slider', { name: 'Grouping window' })).toHaveAttribute(
+      'aria-valuetext',
+      '10 minutes',
+    );
+    expect(screen.getByRole('checkbox', { name: 'By node' })).toBeInTheDocument();
+    expect(screen.getByRole('checkbox', { name: 'By workload' })).toBeInTheDocument();
+  });
+
+  it('associates visible labels with escalation controls', () => {
+    const escalation: EscalationConfig = {
+      enabled: true,
+      levels: [{ after: 15, notify: 'email' }],
+    };
+
+    render(() => (
+      <AlertEscalationSection
+        escalation={escalation}
+        setEscalationEnabled={vi.fn()}
+        setEscalationAfter={vi.fn()}
+        setEscalationNotify={vi.fn()}
+        removeEscalationLevel={vi.fn()}
+        addEscalationLevel={vi.fn()}
+      />
+    ));
+
+    expect(screen.getByRole('spinbutton', { name: 'After' })).toBeInTheDocument();
+    expect(screen.getByRole('combobox', { name: 'Notify' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Remove escalation level' })).toBeInTheDocument();
+  });
+});