Upgrade @types/react to 19 and run codemod (attempt 2) (#8918)

* update dependencies

* rm `import type React from 'react'`

* run codemods

* patch discord types

* update types/react-dom

* Update yarn.lock

src/view/com/util/ViewHeader.tsx

@@ -1,3 +1,5 @@
+import {type JSX} from 'react'
+
 import {Header} from '#/components/Layout'
 
 /**