refactor(app): migrate small styles to tailwind

src/app/chat/components/__tests__/pwa-install-overlay.test.tsx

@@ -0,0 +1,10 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+
+import { PwaInstallOverlay } from "../pwa-install-overlay";
+
+describe("PwaInstallOverlay", () => {
+  it("does not render visible markup", () => {
+    expect(renderToStaticMarkup(<PwaInstallOverlay enabled />)).toBe("");
+  });
+});

src/app/chat/components/pwa-install-overlay.module.css

@@ -1,5 +0,0 @@
-/* PwaInstallOverlay PWA 安装弹窗触发器样式（无可见 UI，逻辑触发用） */
-
-.hidden {
-  display: none;
-}

src/app/chat/components/pwa-install-overlay.tsx

@@ -22,7 +22,6 @@ import {
 import { pwaUtil } from "@/utils";
 
 import { PwaInstallDialog } from "./pwa-install-dialog";
-import styles from "./pwa-install-overlay.module.css";
 
 const DEVELOPMENT_DIALOG_DELAY_MS = 1000;
 const PRODUCTION_DIALOG_DELAY_MS = 1500;
@@ -74,7 +73,7 @@ export function PwaInstallOverlay({ enabled }: PwaInstallOverlayProps) {
     };
   }, [enabled]);
 
-  return <div className={styles.hidden} aria-hidden="true" />;
+  return null;
 }
 
 async function shouldShowPwaInstallDialog(isDevelopment: boolean) {