chore: bump version to v2026.4.373 and improve frontend switching}
- Bump version from 2026.4.371 to 2026.4.373 in package.json and README.md - Add early redirect scripts in Angular and React index.html to auto-route users to their preferred frontend based on localStorage preference - Post message to parent frame when switching to React from Angular settings, enabling iframe-aware frontend preference propagation - Fix AI console context to read redis info fields from flat structure instead of nested server object, and add connected_clients and used_memory_human to AI context - Use persistent storage abstraction (setPersistentItem) for frontend switch in React settings and correct Angular settings URL path