Migrate Settings screen to React (REST-driven, legacy fallback)

.gitignore

@@ -55,26 +55,36 @@ tests/chrome_recordings
 *.min.css.*
 tests/e2e/plugins-page-wpuf-lite-check.png
 tests/e2e/screenshots
+
+# --- CI-built assets (generated by `npm run build` + `grunt release`) ---
+# These are produced fresh in the release workflow and shipped by the 10up
+# deploy from the working tree. Do NOT commit them. (Third-party libs and the
+# hand-written vite/less sources stay tracked — only these generated outputs.)
+assets/js/account.min.js
+assets/js/ai-form-builder.min.js
+assets/js/forms-list.min.js
+assets/js/forms-list.min.js.map
+assets/js/frontend-form.min.js
+assets/js/frontend-subscriptions.min.js
+assets/js/subscriptions.min.js
+assets/js/upload.min.js
+assets/js/wpuf-form-builder.js
+assets/js/wpuf-form-builder-mixins.js
+assets/js/wpuf-form-builder-components.js
+assets/js-templates/form-components.php
+assets/css/admin.css
+assets/css/elementor-frontend-forms.css
+assets/css/frontend-forms.css
+assets/css/registration-forms.css
+assets/css/wpuf-form-builder.css
+languages/wp-user-frontend.pot
+
+# React settings screen — generated build outputs (built via
+# `npm run build:settings-react`; produced fresh in the release workflow).
+assets/js/settings-react.min.js
+assets/js/settings-react.min.js.map
+assets/js/settings-react.min.asset.php
+assets/css/settings-react.css
 
-# --- CI-built assets (generated by `npm run build` + `grunt release`) ---
-# These are produced fresh in the release workflow and shipped by the 10up
-# deploy from the working tree. Do NOT commit them. (Third-party libs and the
-# hand-written vite/less sources stay tracked — only these generated outputs.)
-assets/js/account.min.js
-assets/js/ai-form-builder.min.js
-assets/js/forms-list.min.js
-assets/js/forms-list.min.js.map
-assets/js/frontend-form.min.js
-assets/js/frontend-subscriptions.min.js
-assets/js/subscriptions.min.js
-assets/js/upload.min.js
-assets/js/wpuf-form-builder.js
-assets/js/wpuf-form-builder-mixins.js
-assets/js/wpuf-form-builder-components.js
-assets/js-templates/form-components.php
-assets/css/admin.css
-assets/css/elementor-frontend-forms.css
-assets/css/frontend-forms.css
-assets/css/registration-forms.css
-assets/css/wpuf-form-builder.css
-languages/wp-user-frontend.pot
+# OpenSpec change docs — not shipped
+openspec/