app: fix workspace flicker when switching directories (#18207)

Co-authored-by: Shoubhit Dash <shoubhit2005@gmail.com>

packages/app/e2e/actions.ts

@@ -1,3 +1,4 @@
+import { base64Decode, base64Encode } from "@opencode-ai/util/encode"
 import { expect, type Locator, type Page } from "@playwright/test"
 import fs from "node:fs/promises"
 import os from "node:os"
@@ -361,6 +362,30 @@ export async function waitSlug(page: Page, skip: string[] = []) {
   return next
 }
 
+export async function resolveSlug(slug: string) {
+  const directory = base64Decode(slug)
+  if (!directory) throw new Error(`Failed to decode workspace slug: ${slug}`)
+  const resolved = await resolveDirectory(directory)
+  return { directory: resolved, slug: base64Encode(resolved), raw: slug }
+}
+
+export async function waitDir(page: Page, directory: string) {
+  const target = await resolveDirectory(directory)
+  await expect
+    .poll(
+      async () => {
+        const slug = slugFromUrl(page.url())
+        if (!slug) return ""
+        return resolveSlug(slug)
+          .then((item) => item.directory)
+          .catch(() => "")
+      },
+      { timeout: 45_000 },
+    )
+    .toBe(target)
+  return { directory: target, slug: base64Encode(target) }
+}
+
 export function sessionIDFromUrl(url: string) {
   const match = /\/session\/([^/?#]+)/.exec(url)
   return match?.[1]