refactor(sessions): move session summary generation to startup (#14691)

packages/cli/src/gemini.tsx

@@ -498,6 +498,20 @@ export async function main() {
 
     // Handle --list-sessions flag
     if (config.getListSessions()) {
+      // Attempt auth for summary generation (gracefully skips if not configured)
+      const authType = settings.merged.security?.auth?.selectedType;
+      if (authType) {
+        try {
+          await config.refreshAuth(authType);
+        } catch (e) {
+          // Auth failed - continue without summary generation capability
+          debugLogger.debug(
+            'Auth failed for --list-sessions, summaries may not be generated:',
+            e,
+          );
+        }
+      }
+
       await listSessions(config);
       await runExitCleanup();
       process.exit(ExitCodes.SUCCESS);