fix: update React.js to v19.2.1 (security release)

Ref: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components

.vscode/extensions.json

@@ -1,7 +1,7 @@
 {
   "recommendations": [
     "editorconfig.editorconfig",
-    "esbenp.prettier-vscode",
+    "prettier.prettier-vscode",
     "dbaeumer.vscode-eslint",
     "davidanson.vscode-markdownlint",
     "bradlc.vscode-tailwindcss",

.vscode/settings.json

@@ -3,7 +3,7 @@
   "editor.bracketPairColorization.enabled": true,
   "editor.wordWrap": "on",
   "prettier.configPath": ".prettierrc.json",
-  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.defaultFormatter": "prettier.prettier-vscode",
   "editor.formatOnSave": true,
   "editor.codeActionsOnSave": {
     "source.fixAll": "explicit",