Revert "fix(frontend): don't UserDraft.remove flows while route is still mounted"

This reverts commit 079ebef72b.

frontend/src/routes/(root)/(logged)/flows/add/+page.svelte

@@ -174,9 +174,11 @@
 
 <FlowBuilder
 	onSaveInitial={(e) => {
+		UserDraft.remove('flow', '')
 		goto(`/flows/edit/${e.path}?selected=${e.id}`)
 	}}
 	onDeploy={(e) => {
+		UserDraft.remove('flow', '')
 		goto(`/flows/get/${e.path}?workspace=${$workspaceStore}`)
 	}}
 	onDetails={(e) => {

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

@@ -270,11 +270,7 @@
 {:else}
 	<FlowBuilder
 		onDeploy={(e) => {
-			// Don't UserDraft.remove here — the route's flowStore reads the
-			// handle's draft directly, so clearing it before goto would blank
-			// the flow value and trip UnsavedConfirmationModal. The entry's
-			// ref count drops on unmount and the next visit's load-time diff
-			// will silently overwrite localStorage with the deployed value.
+			UserDraft.remove('flow', flowDraftPath)
 			goto(`/flows/get/${e.path}?workspace=${$workspaceStore}`)
 		}}
 		onDetails={(e) => {