feat: integrate Socket.IO for real-time communication; add socket connection management and token refresh handling

src/lib/api/client.ts

@@ -1,6 +1,7 @@
 import { API_CONFIG } from './config'
 import { createApiError, NetworkError, TimeoutError } from './errors'
 import type { ApiClient, ApiRequestConfig, HttpMethod } from './types'
+import { authEvents, AUTH_EVENTS } from '../events'
 
 export class BaseApiClient implements ApiClient {
   private refreshPromise: Promise<void> | null = null
@@ -147,6 +148,9 @@ export class BaseApiClient implements ApiClient {
     if (!response.ok) {
       throw createApiError(response, await this.safeParseJSON(response))
     }
+
+    // Emit token refresh event for socket reconnection (reactive refresh)
+    authEvents.emit(AUTH_EVENTS.TOKEN_REFRESHED)
   }
 
   private handleAuthenticationFailure(): void {