fix(frontend): wire ?nodraft=true to actually skip the local autosave on /edit

The flows/apps/apps_raw `/edit` routes had a `?nodraft=true` handler
that just stripped the param from the URL via `afterNavigate` —
nothing behind it. The original pre-PR semantics (and what every
caller assumes) was "skip the localStorage autosave on this load."

Mirror the synchronous wipe pattern already in /add: when nodraft is
present, call `UserDraft.remove(kind, path)` and strip the flag from
the URL via `window.history.replaceState`, before the UserDraft handle
is created. The handle then reads an empty entry and the editor opens
on the backend version. A plain reload (no nodraft) restores the
autosave normally.

Removed the redundant `afterNavigate` blocks. Dropped the now-unused
`afterNavigate` import in all three; apps/edit still imports
`replaceState` (used downstream), so only that name stayed.

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

@@ -8,7 +8,7 @@
 	} from '$lib/gen'
 	import { workspaceStore } from '$lib/stores'
 	import { cleanValueProperties, orderedJsonStringify, type Value } from '$lib/utils'
-	import { afterNavigate, replaceState } from '$app/navigation'
+	import { replaceState } from '$app/navigation'
 	import { goto } from '$lib/navigation'
 	import { sendUserToast } from '$lib/toast'
 	import DiffDrawer from '$lib/components/DiffDrawer.svelte'
@@ -67,15 +67,16 @@
 		staleModalOpen = false
 	}
 
-	let nodraft = page.url.searchParams.get('nodraft')
-
-	afterNavigate(() => {
-		if (nodraft) {
-			let url = new URL(page.url.href)
-			url.search = ''
-			replaceState(url.toString(), page.state)
-		}
-	})
+	// `?nodraft=true` is the callers' way of saying "skip the local autosave
+	// on this load." Wipe the UserDraft entry and strip the flag from the
+	// URL synchronously, before any descendant reads it. A plain reload
+	// (no nodraft) restores normally.
+	if (page.url.searchParams.get('nodraft') && typeof window !== 'undefined') {
+		UserDraft.remove('app', path)
+		const url = new URL(window.location.href)
+		url.searchParams.delete('nodraft')
+		window.history.replaceState(window.history.state, '', url.toString())
+	}
 
 	/** Increments per `loadApp` call. Stale loads (e.g. when picker
 	 * navigation races a draft-discard reload) bail at the next checkpoint

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

@@ -9,7 +9,6 @@
 		readFieldsRecursively,
 		type Value
 	} from '$lib/utils'
-	import { afterNavigate, replaceState } from '$app/navigation'
 	import { goto } from '$lib/navigation'
 	import { sendUserToast } from '$lib/toast'
 	import DiffDrawer from '$lib/components/DiffDrawer.svelte'
@@ -55,6 +54,17 @@
 	let redraw = $state(0)
 	let path = page.params.path ?? ''
 
+	// `?nodraft=true` is the callers' way of saying "skip the local autosave
+	// on this load." Wipe the UserDraft entry and strip the flag from the
+	// URL synchronously, before the handle is created. A plain reload (no
+	// nodraft) restores normally.
+	if (page.url.searchParams.get('nodraft') && typeof window !== 'undefined') {
+		UserDraft.remove('raw_app', path)
+		const url = new URL(window.location.href)
+		url.searchParams.delete('nodraft')
+		window.history.replaceState(window.history.state, '', url.toString())
+	}
+
 	const draftHandle = UserDraft.use<RawAppDraft>('raw_app', path)
 
 	// Local-draft staleness modal: opened when the remote has moved on since
@@ -97,16 +107,6 @@
 		draftHandle.draft = { files, runnables, data, summary }
 	})
 
-	let nodraft = page.url.searchParams.get('nodraft')
-
-	afterNavigate(() => {
-		if (nodraft) {
-			let url = new URL(page.url.href)
-			url.search = ''
-			replaceState(url.toString(), page.state)
-		}
-	})
-
 	function extractRawApp(app: any) {
 		runnables = app.value.runnables
 		// Support old formats and new format

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

@@ -13,7 +13,6 @@
 	} from '$lib/utils'
 	import { initFlow } from '$lib/components/flows/flowStore.svelte'
 	import { goto } from '$lib/navigation'
-	import { afterNavigate, replaceState } from '$app/navigation'
 
 	import { sendUserToast } from '$lib/toast'
 	import DiffDrawer from '$lib/components/DiffDrawer.svelte'
@@ -49,15 +48,19 @@
 		  })
 		| undefined = $state(undefined)
 
-	afterNavigate(() => {
-		if (page.url.searchParams.get('nodraft')) {
-			let url = new URL(page.url.href)
-			url.search = ''
-			replaceState(url.toString(), page.state)
-		}
-	})
-
 	const flowDraftPath = page.params.path ?? ''
+
+	// `?nodraft=true` is the callers' way of saying "skip the local autosave
+	// on this load." Wipe the UserDraft entry and strip the flag from the
+	// URL synchronously, before the handle is created — same pattern as
+	// /flows/add. A plain reload (no nodraft) restores normally.
+	if (page.url.searchParams.get('nodraft') && typeof window !== 'undefined') {
+		UserDraft.remove('flow', flowDraftPath)
+		const url = new URL(window.location.href)
+		url.searchParams.delete('nodraft')
+		window.history.replaceState(window.history.state, '', url.toString())
+	}
+
 	const flowHandle = UserDraft.use<Flow>('flow', flowDraftPath)
 
 	function emptyFlow(): Flow {