Bump react from 19.1.1 to 19.2.6 in /Plan/react/dashboard

Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) from 19.1.1 to 19.2.6.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.6/packages/react)

---
updated-dependencies:
- dependency-name: react
  dependency-version: 19.2.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Plan/react/dashboard/package.json

@@ -32,7 +32,7 @@
     "i18next-localstorage-backend": "4.3.1",
     "masonry-layout": "4.2.2",
     "moment": "2.30.1",
-    "react": "19.1.1",
+    "react": "19.2.6",
     "react-bootstrap": "2.10.10",
     "react-bootstrap-range-slider": "3.0.8",
     "react-datepicker": "9.1.0",

Plan/react/dashboard/yarn.lock

@@ -1516,10 +1516,10 @@ react-transition-group@4.4.5, react-transition-group@^4.3.0, react-transition-gr
     loose-envify "^1.4.0"
     prop-types "^15.6.2"
 
-react@19.1.1:
-  version "19.1.1"
-  resolved "https://registry.yarnpkg.com/react/-/react-19.1.1.tgz#06d9149ec5e083a67f9a1e39ce97b06a03b644af"
-  integrity sha512-w8nqGImo45dmMIfljjMwOGtbmC/mk4CMYhWIicdSflH91J9TyCyczcPFXJzrZ/ZXcgGRFeP6BU0BEJTw6tZdfQ==
+react@19.2.6:
+  version "19.2.6"
+  resolved "https://registry.yarnpkg.com/react/-/react-19.2.6.tgz#3dadb8e12b2a7934c1d5317973e5dce1301f9a4d"
+  integrity sha512-sfWGGfavi0xr8Pg0sVsyHMAOziVYKgPLNrS7ig+ivMNb3wbCBw3KxtflsGBAwD3gYQlE/AEZsTLgToRrSCjb0Q==
 
 readdirp@^4.0.1:
   version "4.1.2"