- Add 4-step progress modal to config apply flow (validate, write, reload, services ready)
- Poll SSE-updated data-share-health attributes to detect when services finish restarting
- Fix stale health bug: recalculate health for affected shares based on actual mount
success instead of preserving old health from before reload
- Add modal overlay/card/step CSS matching the dark theme
- Include connection refactor (multi-protocol support) and probe helpers from prior work
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>