chore: bump version to v2026.4.375 and move Angular under /ng/ base path}
- Bump version from v2026.4.373 to v2026.4.375 in package.json and README.md - Change Angular webpack publicPath from / to /ng/ for output and dev server - Update base href in Angular index.html from / to /ng/ - Add /ng/ prefix to webpack historyApiFallback rewrites - Add root-to-/ng/ redirect middleware in webpack dev server - Add root-to-/react/ redirect middleware in Vite dev server - Update React-to-Angular navigation link in SettingsPage to /ng/settings - Update Angular-to-React frontend switch redirect to use /ng/ prefix - Fix frontend redirect to strip trailing query string separators - Update Playwright production settings URL to /ng/settings - Add preview port configuration (8082) in Vite config