Add dark-theme styles and Leaflet z-index tweaks; switch tile layer URL/attribution based on Next.js theme. Introduce theme hook, PocketBase helper import and tile constants; lower label zoom breakpoint. Replace ZoomWatcher with MapWatcher that invalidates map size when toggling fullscreen. Add fullscreen UI, edit mode toggle, draggable markers when editing, and saveSupplierLocation to persist coordinate updates to PocketBase with optimistic UI and toast feedback. Misc: simplify cluster marker popup handling, ensure popups close before cluster flyTo, and tweak cluster distance label to reflect current zoom.
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