Upgrade React from 197d6a04-20250424 to 79d9aed7-20250620 (#79477)

Author: eps1lon

package.json

@@ -233,16 +233,16 @@
     "pretty-ms": "7.0.0",
     "random-seed": "0.3.0",
     "react": "19.0.0",
-    "react-builtin": "npm:[email protected]197d6a04-20250424",
+    "react-builtin": "npm:[email protected]79d9aed7-20250620",
     "react-dom": "19.0.0",
-    "react-dom-builtin": "npm:[email protected]197d6a04-20250424",
-    "react-dom-experimental-builtin": "npm:[email protected]197d6a04-20250424",
-    "react-experimental-builtin": "npm:[email protected]197d6a04-20250424",
-    "react-is-builtin": "npm:[email protected]197d6a04-20250424",
-    "react-server-dom-turbopack": "19.2.0-canary-197d6a04-20250424",
-    "react-server-dom-turbopack-experimental": "npm:[email protected]197d6a04-20250424",
-    "react-server-dom-webpack": "19.2.0-canary-197d6a04-20250424",
-    "react-server-dom-webpack-experimental": "npm:[email protected]197d6a04-20250424",
+    "react-dom-builtin": "npm:[email protected]79d9aed7-20250620",
+    "react-dom-experimental-builtin": "npm:[email protected]79d9aed7-20250620",
+    "react-experimental-builtin": "npm:[email protected]79d9aed7-20250620",
+    "react-is-builtin": "npm:[email protected]79d9aed7-20250620",
+    "react-server-dom-turbopack": "19.2.0-canary-79d9aed7-20250620",
+    "react-server-dom-turbopack-experimental": "npm:[email protected]79d9aed7-20250620",
+    "react-server-dom-webpack": "19.2.0-canary-79d9aed7-20250620",
+    "react-server-dom-webpack-experimental": "npm:[email protected]79d9aed7-20250620",
     "react-ssr-prepass": "1.0.8",
     "react-virtualized": "9.22.3",
     "relay-compiler": "13.0.2",
@@ -252,8 +252,8 @@
     "resolve-from": "5.0.0",
     "sass": "1.54.0",
     "satori": "0.12.2",
-    "scheduler-builtin": "npm:[email protected]197d6a04-20250424",
-    "scheduler-experimental-builtin": "npm:[email protected]197d6a04-20250424",
+    "scheduler-builtin": "npm:[email protected]79d9aed7-20250620",
+    "scheduler-experimental-builtin": "npm:[email protected]79d9aed7-20250620",
     "seedrandom": "3.0.5",
     "semver": "7.3.7",
     "shell-quote": "1.7.3",
@@ -296,10 +296,10 @@
       "@types/react-dom": "19.1.2",
       "@types/retry": "0.12.0",
       "jest-snapshot": "30.0.0-alpha.6",
-      "react": "19.2.0-canary-197d6a04-20250424",
-      "react-dom": "19.2.0-canary-197d6a04-20250424",
-      "react-is": "19.2.0-canary-197d6a04-20250424",
-      "scheduler": "0.27.0-canary-197d6a04-20250424"
+      "react": "19.2.0-canary-79d9aed7-20250620",
+      "react-dom": "19.2.0-canary-79d9aed7-20250620",
+      "react-is": "19.2.0-canary-79d9aed7-20250620",
+      "scheduler": "0.27.0-canary-79d9aed7-20250620"
     },
     "patchedDependencies": {
       "[email protected]": "patches/[email protected]",

packages/next/src/client/app-index.tsx

@@ -206,7 +206,15 @@ function Root({ children }: React.PropsWithChildren<{}>) {
   return children
 }
 
+function onDefaultTransitionIndicator() {
+  // TODO: Compose default with user-configureable (e.g. nprogress)
+  // TODO: Use React's default once we figure out hanging indicators: https://codesandbox.io/p/sandbox/charming-moon-hktkp6?file=%2Fsrc%2Findex.js%3A106%2C30
+  return () => {}
+}
+
 const reactRootOptions: ReactDOMClient.RootOptions = {
+  // @ts-expect-error: Should pass on `@types/react` bump.
+  onDefaultTransitionIndicator: onDefaultTransitionIndicator,
   onRecoverableError,
   onCaughtError,
   onUncaughtError,