fix: address code review feedback - improve browser detection and docs

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/plugins/driver-memory/src/memory-driver.ts

@@ -928,7 +928,7 @@ export class InMemoryDriver implements DriverInterface {
    * Detect whether the current runtime is a browser environment.
    */
   private isBrowserEnvironment(): boolean {
-    return typeof window !== 'undefined' && typeof window.localStorage !== 'undefined';
+    return typeof globalThis.localStorage !== 'undefined';
   }
 
   /**

packages/spec/src/data/driver/memory.zod.ts

@@ -98,7 +98,7 @@ export const AutoPersistenceConfigSchema = z.object({
   type: z.literal('auto'),
   /** File path override when running in Node.js. */
   path: z.string().optional().describe('File path override for Node.js environments'),
-  /** Auto-save interval override when running in Node.js. Default: 2000ms. */
+  /** Auto-save interval override when running in Node.js. */
   autoSaveInterval: z.number().min(100).optional().describe('Auto-save interval override for Node.js environments'),
   /** localStorage key override when running in a browser. */
   key: z.string().optional().describe('localStorage key override for browser environments'),