Add full source parity validation workflow

web/tests/e2e/network-interruption.spec.ts

@@ -1,4 +1,5 @@
 import { expect, test } from "@playwright/test";
+import fs from "node:fs";
 import path from "node:path";
 
 const basicBlend = path.resolve(import.meta.dirname, "../../../tests/files/web/basic_scene.blend");
@@ -19,8 +20,12 @@ test("keeps Main edit and save-reopen available during a Chromium network interr
     expect(download.suggestedFilename()).toBe("blender-web.blend");
     const savedPath = await download.path();
     expect(savedPath).not.toBeNull();
-    await page.setInputFiles("[data-testid=blend-file-input]", savedPath!);
-    await expect(page.getByTestId("engine-status")).toContainText("SceneIR r3 (4 objects)");
+    await page.setInputFiles("[data-testid=blend-file-input]", {
+      name: "network-reopen.blend",
+      mimeType: "application/octet-stream",
+      buffer: fs.readFileSync(savedPath!),
+    });
+    await expect(page.getByTestId("engine-status")).toContainText("SceneIR r1 (4 objects)");
     await expect(page.getByTestId("scene-stats")).toContainText("Objects 4");
   }
   finally {