chore: bump version to v2026.4.304 and update changelog}
- Bump version from v2026.4.303 to v2026.4.304 in package.json - Add v2026.4.304 changelog entry summarizing recent releases: - AngularJS hybrid to standalone Angular migration - CommonJS to ES modules migration - Electron webview to iframe migration - AOT compilation, jQuery removal, moment.js to dayjs - Web Worker for key sorting, draft release promotion - Multiple bugfixes (race conditions, ChangeDetectorRef, search, socket) - Removed legacy AngularJS source files - Drop armv7l (32-bit ARM) from publish-electron and publish-electron-snap scripts - Update build version string across all docs and changelog files