Key workspace status and ownership by ID, not directory

Multiple workspaces can share one checkout directory. Agent and terminal
status, sidebar tabs, and ownership now attribute strictly by workspace ID,
so a running or blocked agent in one workspace no longer shows up on its
same-directory siblings.

A one-time startup migration backfills workspace IDs onto legacy agents, and
every agent and terminal is created with one thereafter. Directory lookups
remain only for genuinely folder-derived git facts (branch, diff) and the
archive-by-path adapter.

packages/app/e2e/helpers/new-workspace.ts

@@ -14,7 +14,9 @@ type NewWorkspaceDaemonClient = Pick<
   | "createPaseoWorktree"
   | "fetchWorkspaces"
   | "getPaseoWorktreeList"
+  | "getDaemonConfig"
   | "openProject"
+  | "patchDaemonConfig"
 >;
 
 type OpenProjectPayload = Awaited<ReturnType<NewWorkspaceDaemonClient["openProject"]>>;
@@ -314,18 +316,18 @@ export async function assertNewWorkspaceSidebarAndHeader(
     assertHeader?: boolean;
   },
 ): Promise<{ workspaceId: string; workspaceName: string; workspaceDirectory: string }> {
-  // Wait for URL to redirect to the newly created workspace.
-  // Uses URL as source of truth to avoid picking up sidebar rows from concurrent tests.
-  let workspaceId: string | null = null;
-  const deadline = Date.now() + 60_000;
-  while (Date.now() < deadline) {
-    workspaceId = parseWorkspaceIdFromPageUrl(page, input.serverId);
-    if (workspaceId && workspaceId !== input.previousWorkspaceId) {
-      break;
-    }
-    await page.waitForTimeout(250);
-  }
+  // URL is the source of truth so concurrent sidebar rows cannot satisfy this.
+  await expect
+    .poll(
+      () => {
+        const workspaceId = parseWorkspaceIdFromPageUrl(page, input.serverId);
+        return workspaceId && workspaceId !== input.previousWorkspaceId ? workspaceId : null;
+      },
+      { timeout: 60_000 },
+    )
+    .not.toBeNull();
 
+  const workspaceId = parseWorkspaceIdFromPageUrl(page, input.serverId);
   if (!workspaceId || workspaceId === input.previousWorkspaceId) {
     throw new Error(`Expected URL to redirect to a new workspace.\nCurrent URL: ${page.url()}`);
   }