➕(frontend) add react-intersection-observer package

- Install `react-intersection-observer` to manage element visibility detection.
- Enables features like lazy loading, animations on scroll, and triggering
events when elements appear in the viewport.

src/frontend/apps/impress/package.json

@@ -34,6 +34,7 @@
     "react-aria-components": "1.5.0",
     "react-dom": "*",
     "react-i18next": "15.4.0",
+    "react-intersection-observer": "9.13.1",
     "react-select": "5.9.0",
     "styled-components": "6.1.13",
     "y-protocols": "1.0.6",

src/frontend/yarn.lock

@@ -11249,6 +11249,11 @@ react-icons@^5.2.1:
   resolved "https://registry.yarnpkg.com/react-icons/-/react-icons-5.4.0.tgz#443000f6e5123ee1b21ea8c0a716f6e7797f7416"
   integrity sha512-7eltJxgVt7X64oHh6wSWNwwbKTCtMfK35hcjvJS0yxEAhPM8oUKdS3+kqaW1vicIltw+kR2unHaa12S9pPALoQ==
 
+react-intersection-observer@9.13.1:
+  version "9.13.1"
+  resolved "https://registry.yarnpkg.com/react-intersection-observer/-/react-intersection-observer-9.13.1.tgz#6c61a75801162491c6348bad09967f2caf445584"
+  integrity sha512-tSzDaTy0qwNPLJHg8XZhlyHTgGW6drFKTtvjdL+p6um12rcnp8Z5XstE+QNBJ7c64n5o0Lj4ilUleA41bmDoMw==
+
 react-is@18.2.0:
   version "18.2.0"
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-18.2.0.tgz#199431eeaaa2e09f86427efbb4f1473edb47609b"