fix: keep a new schedule's template readable after its first load

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ViTUkt4czrvZdxdWwxqRAQ

frontend/src/lib/components/triggers/schedules/ScheduleEditorInner.svelte

@@ -185,7 +185,6 @@
 		async load({ workspace, path }) {
 			if (isTemporaryPath(path)) {
 				const opts = newTemplates.get(path)
-				newTemplates.delete(path)
 				if (!opts) throw new Error('No template for this schedule')
 				return { template: await newScheduleCfg(opts) }
 			}