Extract setupGlobalErrorHandler() utility from contacts app and add to
@manacore/shared-ui. Migrate 7 apps to use the shared implementation:
calendar, chat, clock, contacts, matrix, picture, storage.
Features:
- Catches unhandled promise rejections with error classification
- Handles offline/online network status changes
- Built-in i18n (DE + EN) with customizable translations
- Optional onAuthError callback for redirect handling
- Returns cleanup function for proper unmounting
cdac341882