fix: follow a moved draft on tab close, and deploy a followed flow at its new path

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

frontend/src/lib/components/FlowBuilder.svelte

@@ -488,9 +488,7 @@
 		deployedBy = flow.edited_by
 		// Names the deployed side of the diff. Without it the reader is shown two panes
 		// and told nothing about what the left one is.
-		const versions = (flow as any).versions as number[] | undefined
-		const head = versions?.length ? versions[versions.length - 1] : undefined
-		deployedLabel = `Deployed${head ? ` v${head}` : ''}${flow.edited_by ? ` by ${flow.edited_by}` : ''}`
+		deployedLabel = `Deployed${flow.version_id != null ? ` ${flow.version_id}` : ''}${flow.edited_by ? ` by ${flow.edited_by}` : ''} · latest`
 	}
 
 	async function saveFlow(deploymentMsg?: string, toDeploy?: DraftChangesToDeploy): Promise<void> {

frontend/src/lib/userDraftDbSyncer.svelte.ts

@@ -405,7 +405,8 @@ function flushOnPageHide(): void {
 				body: JSON.stringify({
 					value: opts.value,
 					last_sync: opts.force ? undefined : lastSync,
-					force: opts.force ?? false
+					force: opts.force ?? false,
+					id: draftIds.get(key)
 				}),
 				keepalive: true
 			}).catch((e) => {

frontend/src/routes/(root)/(logged)/flows/edit/[...path]/+page.svelte

@@ -379,8 +379,11 @@
 		// Surface the saved `draft_path` to the Path widget so the topbar shows the
 		// pending name, not the `draft_{uuid}` URL. Else the widget seeds from the
 		// URL, the first edit clobbers `draft_path`, and the friendly name is lost.
+		// Otherwise the URL, set on every load: this route instance is reused when the
+		// editor follows its draft to a moved item, and the path it opened on is where
+		// deploy would look for the flow.
 		const renderedDraftPath = (effectiveFlow as any).draft_path as string | undefined
-		if (renderedDraftPath) flowInitialPath = renderedDraftPath
+		flowInitialPath = renderedDraftPath || (page.params.path ?? '')
 
 		// "Load another user's draft" handoff: render their value over the deployed
 		// metadata. Overlay mode (we have our own draft) never saves until the user