senke 64f62635a5 api-versioning: add X-API-Deprecated header and frontend deprecation warning ... - Backend: Add X-API-Deprecated header alongside existing X-API-Version-Deprecated - Frontend: Show deprecation warning toast when deprecated API version detected - Warning shown only once per session to avoid spam - Includes sunset date in warning message if available		2026-01-15 16:56:21 +01:00
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web	api-versioning: add X-API-Deprecated header and frontend deprecation warning	2026-01-15 16:56:21 +01:00