✨ 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/content/section-registry.tsx

@@ -41,7 +41,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'dashboard',
     titleKey: 'Data Dashboard',
-    descriptionKey: 'Configure data export settings for dashboard',
     build: (settings: ContentSettings) => (
       <DashboardSection
         defaultValues={{
@@ -57,7 +56,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'announcements',
     titleKey: 'Announcements',
-    descriptionKey: 'Configure system announcements',
     build: (settings: ContentSettings) => (
       <AnnouncementsSection
         enabled={settings['console_setting.announcements_enabled']}
@@ -68,7 +66,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'api-info',
     titleKey: 'API Addresses',
-    descriptionKey: 'Configure API information display',
     build: (settings: ContentSettings) => (
       <ApiInfoSection
         enabled={settings['console_setting.api_info_enabled']}
@@ -79,7 +76,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'faq',
     titleKey: 'FAQ',
-    descriptionKey: 'Configure frequently asked questions',
     build: (settings: ContentSettings) => (
       <FAQSection
         enabled={settings['console_setting.faq_enabled']}
@@ -90,7 +86,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'uptime-kuma',
     titleKey: 'Uptime Kuma',
-    descriptionKey: 'Configure Uptime Kuma monitoring integration',
     build: (settings: ContentSettings) => (
       <UptimeKumaSection
         enabled={settings['console_setting.uptime_kuma_enabled']}
@@ -101,7 +96,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'chat',
     titleKey: 'Chat Presets',
-    descriptionKey: 'Configure chat-related settings',
     build: (settings: ContentSettings) => (
       <ChatSettingsSection defaultValue={settings.Chats} />
     ),
@@ -109,7 +103,6 @@ const CONTENT_SECTIONS = [
   {
     id: 'drawing',
     titleKey: 'Drawing',
-    descriptionKey: 'Configure drawing and Midjourney settings',
     build: (settings: ContentSettings) => (
       <DrawingSettingsSection
         defaultValues={{
@@ -141,3 +134,4 @@ export const CONTENT_SECTION_IDS = contentRegistry.sectionIds
 export const CONTENT_DEFAULT_SECTION = contentRegistry.defaultSection
 export const getContentSectionNavItems = contentRegistry.getSectionNavItems
 export const getContentSectionContent = contentRegistry.getSectionContent
+export const getContentSectionMeta = contentRegistry.getSectionMeta