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- Detect stale data on non-active storage paths after migration; show on deploy/settings page with size info and two-step delete confirmation - Add POST /api/storage/stale-cleanup handler with safety checks (active path protection, registered-path validation, ProtectedHDDPaths guard) - Export ProtectedHDDPaths() from stacks package for reuse in web handlers - Sync FileBrowser mounts after successful app data migration - Deploy page title/h2 now shows "Beállítások" for already-deployed apps instead of always showing "Telepítés" - Also add delete-old-data button on migration-done card in migrate.html Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>