style: add shared content width constraint to AI provider edit pages

src/pages/AiProvidersCodexEditPage.tsx

@@ -14,6 +14,7 @@ import { buildHeaderObject, headersToEntries } from '@/utils/headers';
 import { entriesToModels } from '@/components/ui/ModelInputList';
 import { excludedModelsToText, parseExcludedModels } from '@/components/providers/utils';
 import type { ProviderFormState } from '@/components/providers';
+import layoutStyles from './AiProvidersEditLayout.module.scss';
 
 type LocationState = { fromAiProviders?: boolean } | null;
 
@@ -193,6 +194,7 @@ export function AiProvidersCodexEditPage() {
   return (
     <SecondaryScreenShell
       ref={swipeRef}
+      contentClassName={layoutStyles.content}
       title={title}
       onBack={handleBack}
       backLabel={t('common.back')}