Full automation page upgrade with group management and drag-and-drop:
Backend: batch_update_group() and bulk_set_enabled() DB methods, new
PUT /api/automations/group and POST /api/automations/bulk-toggle endpoints.
Group headers: rename (inline edit), delete (choice dialog — keep
automations or delete all), bulk toggle (enable/disable all in group).
Actions appear on hover, styled as small icon buttons.
Drag and drop: non-system cards are draggable between group sections.
Drop zones show dashed accent border feedback. Collapsed sections
auto-expand on 500ms drag-hover. System/Hub sections dimmed during drag.
dragenter counter pattern handles child element bubbling.
Delete group dialog: glass card modal with three options — keep
automations (move to My Automations), delete everything, or cancel.