fix: recover failed Gaussian project builds

apps/control-station/test/simulationWorkspace.test.mjs

@@ -39,6 +39,18 @@ test("browser upload remains same-origin, resumable and token-free", async () =>
   assert.match(window, /webkitdirectory/);
   assert.match(window, /webkitGetAsEntry/);
   assert.match(window, /ровно одна сцена \.lcc или \.lcc2/);
+  assert.doesNotMatch(window, /Загружаем источник/);
+});
+
+test("failed simulation can restart from its retained Mission Core source", async () => {
+  const [core, workspace] = await Promise.all([
+    read("core/simulation/projects.ts"),
+    read("workspaces/simulation/SimulationWorkspace.tsx"),
+  ]);
+
+  assert.match(core, /retrySimulationProject/);
+  assert.match(core, /\$\{API_ROOT\}\/\$\{encodeURIComponent\(projectId\)\}\/build/);
+  assert.match(workspace, /Повторить сборку/);
 });
 
 test("PlayCanvas owns the realtime scene graph without an iframe or React entity tree", async () => {