fix(ui): set versionInfo on cached update path so agent badges work (#1228)

When checkForUpdates used cached data, it returned without setting
updateStore.versionInfo. This caused getServerVersion() to return
empty, making checkAgentVersion() skip the comparison and report all
agents as up-to-date (green) regardless of their actual version.

frontend-modern/src/stores/updates.ts

@@ -67,6 +67,7 @@ const checkForUpdates = async (force = false): Promise<void> => {
           // Continue to check for updates
         } else {
           // Version matches, use cached data
+          setVersionInfo(currentVersion);
           setUpdateInfo(state.updateInfo);
           setUpdateAvailable(state.updateInfo.available);