feat: implement channel runtime connectors

app-instance/frontend/lib/chat-messages.ts

@@ -1,6 +1,26 @@
 import type { ChatMessage } from '@/types';
 
 const INVISIBLE_CONTENT_CHARS = /[\u200B-\u200D\uFEFF]/g;
+export const CHAT_WAITING_REFRESH_INTERVAL_MS = 1500;
+export const CHAT_IDLE_REFRESH_INTERVAL_MS = 5000;
+
+export function getSessionRefreshIntervalMs({
+  isLoading,
+  isThinking,
+  documentHidden,
+}: {
+  isLoading: boolean;
+  isThinking: boolean;
+  documentHidden: boolean;
+}): number | null {
+  if (documentHidden) {
+    return null;
+  }
+  if (isLoading || isThinking) {
+    return CHAT_WAITING_REFRESH_INTERVAL_MS;
+  }
+  return CHAT_IDLE_REFRESH_INTERVAL_MS;
+}
 
 export function normalizedMessageText(content: unknown): string {
   if (typeof content === 'string') {