fix(studio): reconcile external edits before reload (#2993)

* fix(studio): reconcile external edits before reload

* fix(ci): retry transient workspace installs

Make external reload retry behavior honest and isolate reload listeners.

Remove the dead SDK timestamp parameter.

packages/studio/src/hooks/usePreviewPersistence.test.ts

@@ -0,0 +1,23 @@
+import { describe, expect, it, vi } from "vitest";
+import { StudioFileConflictError } from "../utils/studioSaveDiagnostics";
+import { drainStudioSaveQueues } from "./usePreviewPersistence";
+
+describe("drainStudioSaveQueues", () => {
+  it("does not erase a pending-field conflict with a clean DOM queue", async () => {
+    const conflict = new StudioFileConflictError({
+      filePath: "index.html",
+      currentVersion: "v2",
+      currentContent: "external",
+      attemptedContent: "studio",
+    });
+    const waitForDomQueue = vi.fn(async () => ({ status: "clean" as const }));
+
+    await expect(
+      drainStudioSaveQueues(
+        async () => ({ status: "conflict" as const, error: conflict }),
+        waitForDomQueue,
+      ),
+    ).resolves.toEqual({ status: "conflict", error: conflict });
+    expect(waitForDomQueue).not.toHaveBeenCalled();
+  });
+});