perf(bundle): replace broad storage and utils imports

src/app/chat/chat-screen.helpers.ts

@@ -2,7 +2,8 @@
 
 import type { LoginStatus } from "@/data/dto/auth";
 import type { ChatUpgradeReason } from "@/stores/chat/chat-state";
-import { AppEnvUtil, BrowserDetector } from "@/utils";
+import { AppEnvUtil } from "@/utils/app-env";
+import { BrowserDetector } from "@/utils/browser-detect";
 
 export interface ExternalBrowserPromptState {
   hasInitialized: boolean;