Bump react (internal) (#1893)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Upgrade React and React DOM to 19.2.1 and align related lockfile
entries (including scheduler).
> 
> - **Dependencies**:
> - Upgrade `react` to `^19.2.1` and `react-dom` to `^19.2.1` in
`package.json`.
> - Update lockfile resolutions for `react`, `react-dom`, and
`scheduler` (`0.27.0`), including peer/dependency ranges.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
7085cd54e499a04e89f6325f4e274e19cdde4961. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Upgraded React and React DOM to 19.2.1 to adopt the latest fixes. No app
code changes.

- **Dependencies**
  - Bumped react and react-dom to ^19.2.1.
  - Updated scheduler to 0.27.0 via react-dom.

<sup>Written for commit 7085cd54e499a04e89f6325f4e274e19cdde4961.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

package-lock.json

@@ -76,8 +76,8 @@
         "monaco-editor": "^0.52.2",
         "openai": "^4.91.1",
         "posthog-js": "^1.236.3",
-        "react": "^19.0.0",
-        "react-dom": "^19.0.0",
+        "react": "^19.2.1",
+        "react-dom": "^19.2.1",
         "react-markdown": "^10.1.0",
         "react-resizable-panels": "^2.1.7",
         "react-shiki": "^0.5.2",
@@ -18138,24 +18138,24 @@
       }
     },
     "node_modules/react": {
-      "version": "19.1.1",
-      "resolved": "https://registry.npmjs.org/react/-/react-19.1.1.tgz",
-      "integrity": "sha512-w8nqGImo45dmMIfljjMwOGtbmC/mk4CMYhWIicdSflH91J9TyCyczcPFXJzrZ/ZXcgGRFeP6BU0BEJTw6tZdfQ==",
+      "version": "19.2.1",
+      "resolved": "https://registry.npmjs.org/react/-/react-19.2.1.tgz",
+      "integrity": "sha512-DGrYcCWK7tvYMnWh79yrPHt+vdx9tY+1gPZa7nJQtO/p8bLTDaHp4dzwEhQB7pZ4Xe3ok4XKuEPrVuc+wlpkmw==",
       "license": "MIT",
       "engines": {
         "node": ">=0.10.0"
       }
     },
     "node_modules/react-dom": {
-      "version": "19.1.1",
-      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.1.1.tgz",
-      "integrity": "sha512-Dlq/5LAZgF0Gaz6yiqZCf6VCcZs1ghAJyrsu84Q/GT0gV+mCxbfmKNoGRKBYMJ8IEdGPqu49YWXD02GCknEDkw==",
+      "version": "19.2.1",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.1.tgz",
+      "integrity": "sha512-ibrK8llX2a4eOskq1mXKu/TGZj9qzomO+sNfO98M6d9zIPOEhlBkMkBUBLd1vgS0gQsLDBzA+8jJBVXDnfHmJg==",
       "license": "MIT",
       "dependencies": {
-        "scheduler": "^0.26.0"
+        "scheduler": "^0.27.0"
       },
       "peerDependencies": {
-        "react": "^19.1.1"
+        "react": "^19.2.1"
       }
     },
     "node_modules/react-error-boundary": {
@@ -18977,9 +18977,9 @@
       "license": "MIT"
     },
     "node_modules/scheduler": {
-      "version": "0.26.0",
-      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.26.0.tgz",
-      "integrity": "sha512-NlHwttCI/l5gCPR3D1nNXtWABUmBwvZpEQiD4IXSbIDq8BzLIK/7Ir5gTFSGZDUu37K5cMNp0hFtzO38sC7gWA==",
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
+      "integrity": "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q==",
       "license": "MIT"
     },
     "node_modules/semver": {