fix: remove problematic overrides causing CI lockfile mismatch

Removed @types/react and @types/react-dom overrides that were causing
ERR_PNPM_LOCKFILE_CONFIG_MISMATCH in CI. The lockfile now works with
--frozen-lockfile without format conflicts.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: jonphipps

package.json

@@ -295,10 +295,6 @@
     ]
   },
   "pnpm": {
-    "overrides": {
-      "@types/react": "^19.1.6",
-      "@types/react-dom": "^19.1.6"
-    },
     "onlyBuiltDependencies": [
       "@parcel/watcher",
       "@swc/core",