fix: revert withReactNativeImagePickerFix to use withProjectBuildGradle

react-native-image-picker reads from rootProject.ext, so the property
must be set in the root build.gradle, not app/build.gradle via project.ext.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: msluszniak

apps/llm/plugins/withReactNativeImagePickerFix.js

@@ -1,16 +1,16 @@
-const { withAppBuildGradle } = require('@expo/config-plugins');
+const { withProjectBuildGradle } = require('@expo/config-plugins');
 
 /**
  * In a Yarn workspace monorepo, react-native is hoisted to the repo root.
- * react-native-image-picker's build.gradle can't find it automatically,
- * so we set REACT_NATIVE_NODE_MODULES_DIR explicitly.
+ * react-native-image-picker reads REACT_NATIVE_NODE_MODULES_DIR from
+ * rootProject.ext, so it must be set in the root android/build.gradle.
  */
 module.exports = function withReactNativeImagePickerFix(config) {
-  return withAppBuildGradle(config, (mod) => {
+  return withProjectBuildGradle(config, (mod) => {
     if (!mod.modResults.contents.includes('REACT_NATIVE_NODE_MODULES_DIR')) {
       mod.modResults.contents = mod.modResults.contents.replace(
-        /^(android\s*\{)/m,
-        `project.ext {
+        /^(allprojects\s*\{)/m,
+        `ext {
     REACT_NATIVE_NODE_MODULES_DIR = new File(["node", "--print", "require.resolve('react-native/package.json')"].execute(null, rootDir).text.trim()).parentFile.absolutePath
 }