✨ 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/models/group-ratio-form.tsx

@@ -45,6 +45,12 @@ import {
 } from '@/components/ui/sheet'
 import { Switch } from '@/components/ui/switch'
 import { Textarea } from '@/components/ui/textarea'
+import {
+  SettingsForm,
+  SettingsSwitchContent,
+  SettingsSwitchItem,
+} from '../components/settings-form-layout'
+import { SettingsPageActionsPortal } from '../components/settings-page-context'
 import { GroupRatioVisualEditor } from './group-ratio-visual-editor'
 import { GroupSpecialUsableRulesEditor } from './group-special-usable-editor'
 
@@ -112,6 +118,16 @@ export const GroupRatioForm = memo(function GroupRatioForm({
       <GroupPricingGuide open={guideOpen} onOpenChange={setGuideOpen} />
 
       <Form {...form}>
+        <SettingsPageActionsPortal>
+          <Button
+            type='button'
+            size='sm'
+            onClick={form.handleSubmit(onSave)}
+            disabled={isSaving}
+          >
+            {isSaving ? t('Saving...') : t('Save group ratios')}
+          </Button>
+        </SettingsPageActionsPortal>
         {editMode === 'visual' ? (
           <div className='space-y-6'>
             <GroupRatioVisualEditor
@@ -136,33 +152,27 @@ export const GroupRatioForm = memo(function GroupRatioForm({
               control={form.control}
               name='DefaultUseAutoGroup'
               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('Default to auto groups')}
-                    </FormLabel>
+                <SettingsSwitchItem>
+                  <SettingsSwitchContent>
+                    <FormLabel>{t('Default to auto groups')}</FormLabel>
                     <FormDescription>
                       {t(
                         'When enabled, newly created tokens start in the first auto group.'
                       )}
                     </FormDescription>
-                  </div>
+                  </SettingsSwitchContent>
                   <FormControl>
                     <Switch
                       checked={field.value}
                       onCheckedChange={field.onChange}
                     />
                   </FormControl>
-                </FormItem>
+                </SettingsSwitchItem>
               )}
             />
-
-            <Button onClick={form.handleSubmit(onSave)} disabled={isSaving}>
-              {isSaving ? t('Saving...') : t('Save group ratios')}
-            </Button>
           </div>
         ) : (
-          <form onSubmit={form.handleSubmit(onSave)} className='space-y-6'>
+          <SettingsForm onSubmit={form.handleSubmit(onSave)}>
             <FormField
               control={form.control}
               name='GroupRatio'
@@ -284,31 +294,25 @@ export const GroupRatioForm = memo(function GroupRatioForm({
               control={form.control}
               name='DefaultUseAutoGroup'
               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('Default to auto groups')}
-                    </FormLabel>
+                <SettingsSwitchItem>
+                  <SettingsSwitchContent>
+                    <FormLabel>{t('Default to auto groups')}</FormLabel>
                     <FormDescription>
                       {t(
                         'When enabled, newly created tokens start in the first auto group.'
                       )}
                     </FormDescription>
-                  </div>
+                  </SettingsSwitchContent>
                   <FormControl>
                     <Switch
                       checked={field.value}
                       onCheckedChange={field.onChange}
                     />
                   </FormControl>
-                </FormItem>
+                </SettingsSwitchItem>
               )}
             />
-
-            <Button type='submit' disabled={isSaving}>
-              {isSaving ? t('Saving...') : t('Save group ratios')}
-            </Button>
-          </form>
+          </SettingsForm>
         )}
       </Form>
     </div>