Duplicate an event type, with every child dataset

CHANGELOG.md

@@ -11,6 +11,19 @@ exact tag (`ghcr.io/calnode/calnode:0.1.0`) if you need stability between upgrad
 
 ## [Unreleased]
 
+### Added
+- **Duplicate an event type.** `POST /v1/event-types/{slug}/duplicate`, and a Duplicate
+  action on each row of the event-types list. Closes
+  [#17](https://github.com/Calnode/calnode/issues/17).
+
+  The copy carries everything that hangs off the original - intake questions, host
+  assignments, event-type-specific availability rules, the reminder schedule, and the
+  custom email subjects and notes - as a single transaction, so a half-built copy can
+  never be left behind. It is created inactive, under a generated `<slug>-copy` (then
+  `-copy-2`, `-copy-3`, …) slug, and keeps `price_cents`/`currency` verbatim: zeroing a
+  copied price is how a paid meeting quietly starts selling for nothing. Bookings are not
+  copied.
+
 ## [0.8.0] - 2026-09-03
 
 ### Added

frontend/src/routes/event-types/+page.svelte

@@ -18,6 +18,9 @@
 	let creating = $state(false);
 	let deleteOpen = $state(false);
 	let deleteSlug = $state('');
+	// Slug currently being duplicated, so the row's button can't be double-fired into two
+	// copies while the request is in flight.
+	let duplicating = $state('');
 
 	let filter = $state<'active' | 'archived'>('active');
 	const visible = $derived(items.filter((et) => (filter === 'archived' ? !!et.archived : !et.archived)));
@@ -79,6 +82,22 @@
 		}
 	}
 
+	// The copy is created inactive, so the toast names the new slug: nothing appears on a
+	// booking page until the operator edits it and switches it on.
+	async function duplicateEventType(et: EventType) {
+		if (duplicating) return;
+		duplicating = et.slug;
+		try {
+			const copy = await api.post<EventType>(`/v1/event-types/${et.slug}/duplicate`);
+			toast.success(`Duplicated as "${copy.slug}" — inactive until you turn it on`);
+			await load();
+		} catch (e: any) {
+			toast.error(e.message || 'Could not duplicate event type');
+		} finally {
+			duplicating = '';
+		}
+	}
+
 	function del(slug: string) {
 		deleteSlug = slug;
 		deleteOpen = true;
@@ -219,6 +238,17 @@
 									</Tooltip.Root>
 
 									{#if et.owned !== false}
+										<Tooltip.Root>
+											<Tooltip.Trigger
+												class={buttonVariants({ variant: 'ghost', size: 'icon' })}
+												onclick={() => duplicateEventType(et)}
+												disabled={duplicating === et.slug}
+											>
+												<!-- Copy icon -->
+												<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="8" y="8" width="14" height="14" rx="2" ry="2"/><path d="M4 16c-1.1 0-2-.9-2-2V4c0-1.1.9-2 2-2h10c1.1 0 2 .9 2 2"/></svg>
+											</Tooltip.Trigger>
+											<Tooltip.Content>Duplicate</Tooltip.Content>
+										</Tooltip.Root>
 										<Tooltip.Root>
 											<Tooltip.Trigger
 												class={buttonVariants({ variant: 'ghost', size: 'icon' })}