Show live order progress, delays, and kitchen cancellations

- Order cards derive their label from item progress (Not Started,
  Preparing, Partly Ready, Ready, Picked Up, Cancelled) instead of the
  order's own status; final states are coloured
- Order page: animated status banner per item (ready/picked up check,
  cancelled cross, running-late clock), steps collapse once an item is
  settled with a Show/Hide steps toggle, done steps are faded instead
  of struck through, and the per-item status badge is gone
- New Delay concept: machines can report extra time on a claimed step
  (preparation_step_instances.delay_seconds), which counts toward the ETA
- The kitchen can cancel an item at any point before it's ready, with a
  refund (order_items.cancelled_by records who cancelled)
- Dev kitchen simulation now runs server-side across every order, so a
  step nobody is watching no longer blocks the queue; each settled step
  may randomly be delayed or cancelled
- Humanize snake_case statuses in the UI

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

drizzle/0007_dazzling_norman_osborn.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "order_items" ADD COLUMN "cancelled_by" text;--> statement-breakpoint
+ALTER TABLE "preparation_step_instances" ADD COLUMN "delay_seconds" integer DEFAULT 0 NOT NULL;