[marikbrest]

Adds selectable English and Hebrew UI language, with English remaining the default. A language selector is available on the sign-in screen and above the signed-in content. The choice is stored in this browser and reloads the current page, keeping module-level navigation labels and lazy-loaded screens consistent.

Hebrew selects right-to-left document layout, localized dates and Hebrew PWA metadata. English selects left-to-right layout and English strings. Dialog positioning, dropdowns, tabs and keyboard navigation follow the selected direction, while message content uses automatic text direction. The selector reports blocked browser storage rather than silently losing the preference. The README documents page reloads and saving unfinished form edits first.

This is a browser-local UI preference. Server-generated WhatsApp alerts and backend monitoring, classification and delivery retain their existing behavior; the final diff contains frontend files and the README only.

Validation

• Frontend: 223 tests passed across 40 files, including the English default, persisted Hebrew choice, storage failures, matching dictionary keys, parameterized English labels and RTL keyboard behavior.
• Browser checks on a temporary empty database: English sign-in, switching to Hebrew, persistence after reload, signed-in navigation switching back to English, and both directions at 375px width without horizontal overflow.
• Production frontend build, TypeScript, lint and formatting passed.
• Python: 626 tests passed; 7 external integrations deselected. Ruff and strict mypy passed.
• PostgreSQL/MySQL execution has not been tested locally; GitHub checks have not yet reported results.