diff --git a/src/pages/VersionManagementPage.tsx b/src/pages/VersionManagementPage.tsx
index 48c5d33..80ce15e 100644
--- a/src/pages/VersionManagementPage.tsx
+++ b/src/pages/VersionManagementPage.tsx
@@ -5,7 +5,6 @@ import { listen } from '@tauri-apps/api/event';
 import {
   AlertCircle,
   Check,
-  Database,
   Download,
   ExternalLink,
   Info,
@@ -39,10 +38,6 @@ export type CoreInstallTask = {
   result: CoreInstallResult | null;
 };
 
-export type CodexModelCatalogUpdateResult = {
-  outcome: 'updated' | 'unchanged';
-};
-
 export type VersionSourceSettings = {
   preferGitcodeDownloads: boolean;
   gitcodeAvailable: boolean;
@@ -124,10 +119,6 @@ export function VersionManagementPage() {
   const [versionSourceSaving, setVersionSourceSaving] = useState(false);
   const [versionSourceError, setVersionSourceError] = useState('');
 
-  const [catalogUpdating, setCatalogUpdating] = useState(false);
-  const [catalogUpdateError, setCatalogUpdateError] = useState('');
-  const [catalogUpdateNotice, setCatalogUpdateNotice] = useState('');
-
   const [toastNotice, setToastNotice] = useState<{
     message: string;
     tone: MessageType;
@@ -316,26 +307,6 @@ export function VersionManagementPage() {
     }
   };
 
-  const syncModelCatalog = async () => {
-    setCatalogUpdating(true);
-    setCatalogUpdateError('');
-    setCatalogUpdateNotice('');
-    try {
-      const result = await invoke<CodexModelCatalogUpdateResult>('update_codex_model_catalog');
-      const notice = result.outcome === 'updated'
-        ? t('appUpdate.catalog.updated')
-        : t('appUpdate.catalog.unchanged');
-      setCatalogUpdateNotice(notice);
-      showToast(notice, 'success');
-    } catch (error) {
-      const err = String(error);
-      setCatalogUpdateError(err);
-      showToast(err, 'error');
-    } finally {
-      setCatalogUpdating(false);
-    }
-  };
-
   useEffect(() => {
     let disposed = false;
     let unlisten: (() => void) | null = null;
@@ -677,51 +648,6 @@ export function VersionManagementPage() {
           </div>
         </article>
 
-        <article className="version-list-item catalog-module-card">
-          <div className="version-item-content">
-            <div className="version-card-top">
-              <h2>{t('kernel.versions.catalogCardTitle')}</h2>
-              {catalogUpdating || catalogUpdateError ? (
-                <span className={`version-row-status ${catalogUpdateError ? 'error' : 'info'}`}>
-                  {catalogUpdating ? t('appUpdate.catalog.updating') : t('kernel.update.failed')}
-                </span>
-              ) : null}
-            </div>
-
-            <p className="version-catalog-description">
-              {t('appUpdate.catalog.description')}
-            </p>
-
-            {catalogUpdateError ? (
-              <div className="version-alert-banner error" role="alert">
-                <AlertCircle size={14} />
-                <span>{catalogUpdateError}</span>
-              </div>
-            ) : catalogUpdateNotice ? (
-              <div className="version-alert-banner success">
-                <Check size={14} />
-                <span>{catalogUpdateNotice}</span>
-              </div>
-            ) : null}
-          </div>
-
-          <div className="version-card-actions">
-            <button
-              type="button"
-              className="secondary-button"
-              disabled={catalogUpdating || appUpdateTask.running || busy}
-              onClick={() => void syncModelCatalog()}
-              title={t('appUpdate.catalog.updateHint')}
-            >
-              <Database size={15} className={catalogUpdating ? 'spin' : ''} aria-hidden="true" />
-              <span>
-                {catalogUpdating
-                  ? t('appUpdate.catalog.updating')
-                  : t('appUpdate.catalog.update')}
-              </span>
-            </button>
-          </div>
-        </article>
         </div>
       </section>
 
diff --git a/src/styles.css b/src/styles.css
index 3a40df6..5c23537 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -1075,7 +1075,7 @@ textarea:focus-visible {
 
 .version-card-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(min(270px, 100%), 1fr));
+  grid-template-columns: repeat(2, minmax(0, 1fr));
   align-items: stretch;
   gap: 14px;
 }
@@ -1083,7 +1083,7 @@ textarea:focus-visible {
 .version-list-item {
   display: grid;
   grid-template-rows: minmax(0, 1fr) auto;
-  min-height: 210px;
+  min-height: 220px;
   align-items: stretch;
   gap: 18px;
   padding: 20px;
@@ -1154,6 +1154,7 @@ textarea:focus-visible {
   min-width: 0;
   gap: 2px;
   padding: 10px 12px;
+  border: 1px solid var(--theme-e8e5dc);
   border-radius: 8px;
   background: var(--theme-faf9f5);
 }
@@ -1234,7 +1235,7 @@ textarea:focus-visible {
   align-items: center;
   justify-content: center;
   gap: 6px;
-  flex: 1 1 calc(50% - 4px);
+  flex: 1 1 112px;
   min-height: 33px;
   padding: 5px 10px;
   font-weight: 600;
@@ -1242,14 +1243,6 @@ textarea:focus-visible {
   white-space: nowrap;
 }
 
-.version-catalog-description {
-  margin: 5px 0 0;
-  color: var(--theme-7a746c);
-  font-size: var(--font-size-meta);
-  line-height: var(--line-height-body);
-}
-
-
 .client-api-panel {
   margin-top: 0;
 }
@@ -1624,6 +1617,10 @@ textarea:focus-visible {
 }
 
 @container workspace (max-width: 760px) {
+  .version-card-grid {
+    grid-template-columns: minmax(0, 1fr);
+  }
+
   .version-list-item {
     min-height: 0;
   }