✨ refactor: system settings UI for consistent, compact layouts

Redesign the system settings interface to align with the rest of the console experience by using fixed header actions, removing redundant subtitles, respecting global content width, and standardizing responsive form layouts.

Introduce reusable settings layout primitives for forms, switch rows, grouped controls, nested control sections, title status indicators, and page action portals. Replace duplicated card-style switch markup with explicit compact components, improve nested switch readability, and reduce visual noise across authentication, billing, content, integrations, maintenance, models, and request-limit settings.

Also complete missing i18n translations, remove obsolete subtitle translation keys, refine i18n sync reporting, fix sidebar truncation for long labels, and verify the frontend with type checking and lint diagnostics.

web/default/src/features/system-settings/general/checkin-settings-section.tsx

@@ -21,7 +21,6 @@ import { useForm, type Resolver } from 'react-hook-form'
 import { zodResolver } from '@hookform/resolvers/zod'
 import { useTranslation } from 'react-i18next'
 import { toast } from 'sonner'
-import { Button } from '@/components/ui/button'
 import {
   Form,
   FormControl,
@@ -33,6 +32,12 @@ import {
 } from '@/components/ui/form'
 import { Input } from '@/components/ui/input'
 import { Switch } from '@/components/ui/switch'
+import {
+  SettingsForm,
+  SettingsSwitchContent,
+  SettingsSwitchItem,
+} from '../components/settings-form-layout'
+import { SettingsPageFormActions } from '../components/settings-page-context'
 import { SettingsSection } from '../components/settings-section'
 import { useUpdateOption } from '../hooks/use-update-option'
 
@@ -105,31 +110,28 @@ export function CheckinSettingsSection({
   }
 
   return (
-    <SettingsSection
-      title={t('Check-in Settings')}
-      description={t('Configure daily check-in rewards for users')}
-    >
+    <SettingsSection title={t('Check-in Settings')}>
       <Form {...form}>
-        <form
-          onSubmit={form.handleSubmit(onSubmit)}
-          autoComplete='off'
-          className='space-y-6'
-        >
+        <SettingsForm onSubmit={form.handleSubmit(onSubmit)} autoComplete='off'>
+          <SettingsPageFormActions
+            onSave={form.handleSubmit(onSubmit)}
+            isSaving={updateOption.isPending || isSubmitting}
+            isSaveDisabled={!isDirty}
+            saveLabel='Save check-in settings'
+          />
           <FormField
             control={form.control}
             name='enabled'
             render={({ field }) => (
-              <FormItem className='flex flex-row items-center justify-between rounded-lg border p-4'>
-                <div className='space-y-0.5'>
-                  <FormLabel className='text-base'>
-                    {t('Enable check-in feature')}
-                  </FormLabel>
+              <SettingsSwitchItem>
+                <SettingsSwitchContent>
+                  <FormLabel>{t('Enable check-in feature')}</FormLabel>
                   <FormDescription>
                     {t(
                       'Allow users to check in daily for random quota rewards'
                     )}
                   </FormDescription>
-                </div>
+                </SettingsSwitchContent>
                 <FormControl>
                   <Switch
                     checked={field.value}
@@ -137,7 +139,7 @@ export function CheckinSettingsSection({
                     disabled={updateOption.isPending || isSubmitting}
                   />
                 </FormControl>
-              </FormItem>
+              </SettingsSwitchItem>
             )}
           />
 
@@ -188,16 +190,7 @@ export function CheckinSettingsSection({
               />
             </div>
           )}
-
-          <Button
-            type='submit'
-            disabled={!isDirty || updateOption.isPending || isSubmitting}
-          >
-            {updateOption.isPending || isSubmitting
-              ? t('Saving...')
-              : t('Save check-in settings')}
-          </Button>
-        </form>
+        </SettingsForm>
       </Form>
     </SettingsSection>
   )