✨ 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/model-ratio-form.tsx

@@ -32,6 +32,12 @@ import {
 } from '@/components/ui/form'
 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 { ModelRatioVisualEditor } from './model-ratio-visual-editor'
 
 type ModelFormValues = {
@@ -99,6 +105,25 @@ export const ModelRatioForm = memo(function ModelRatioForm({
       </div>
 
       <Form {...form}>
+        <SettingsPageActionsPortal>
+          <Button
+            type='button'
+            variant='destructive'
+            size='sm'
+            onClick={onReset}
+            disabled={isResetting}
+          >
+            {t('Reset prices')}
+          </Button>
+          <Button
+            type='button'
+            size='sm'
+            onClick={form.handleSubmit(onSave)}
+            disabled={isSaving}
+          >
+            {isSaving ? t('Saving...') : t('Save model prices')}
+          </Button>
+        </SettingsPageActionsPortal>
         {editMode === 'visual' ? (
           <div className='space-y-6'>
             <ModelRatioVisualEditor
@@ -127,43 +152,27 @@ export const ModelRatioForm = memo(function ModelRatioForm({
               control={form.control}
               name='ExposeRatioEnabled'
               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('Expose ratio API')}
-                    </FormLabel>
+                <SettingsSwitchItem>
+                  <SettingsSwitchContent>
+                    <FormLabel>{t('Expose ratio API')}</FormLabel>
                     <FormDescription>
                       {t(
                         'Allow clients to query configured ratios via `/api/ratio`.'
                       )}
                     </FormDescription>
-                  </div>
+                  </SettingsSwitchContent>
                   <FormControl>
                     <Switch
                       checked={field.value}
                       onCheckedChange={field.onChange}
                     />
                   </FormControl>
-                </FormItem>
+                </SettingsSwitchItem>
               )}
             />
-
-            <div className='flex flex-wrap gap-4'>
-              <Button onClick={form.handleSubmit(onSave)} disabled={isSaving}>
-                {isSaving ? t('Saving...') : t('Save model prices')}
-              </Button>
-              <Button
-                type='button'
-                variant='destructive'
-                onClick={onReset}
-                disabled={isResetting}
-              >
-                {t('Reset prices')}
-              </Button>
-            </div>
           </div>
         ) : (
-          <form onSubmit={form.handleSubmit(onSave)} className='space-y-6'>
+          <SettingsForm onSubmit={form.handleSubmit(onSave)}>
             <FormField
               control={form.control}
               name='ModelPrice'
@@ -318,41 +327,25 @@ export const ModelRatioForm = memo(function ModelRatioForm({
               control={form.control}
               name='ExposeRatioEnabled'
               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('Expose ratio API')}
-                    </FormLabel>
+                <SettingsSwitchItem>
+                  <SettingsSwitchContent>
+                    <FormLabel>{t('Expose ratio API')}</FormLabel>
                     <FormDescription>
                       {t(
                         'Allow clients to query configured ratios via `/api/ratio`.'
                       )}
                     </FormDescription>
-                  </div>
+                  </SettingsSwitchContent>
                   <FormControl>
                     <Switch
                       checked={field.value}
                       onCheckedChange={field.onChange}
                     />
                   </FormControl>
-                </FormItem>
+                </SettingsSwitchItem>
               )}
             />
-
-            <div className='flex flex-wrap gap-4'>
-              <Button type='submit' disabled={isSaving}>
-                {isSaving ? t('Saving...') : t('Save model prices')}
-              </Button>
-              <Button
-                type='button'
-                variant='destructive'
-                onClick={onReset}
-                disabled={isResetting}
-              >
-                {t('Reset prices')}
-              </Button>
-            </div>
-          </form>
+          </SettingsForm>
         )}
       </Form>
     </div>