fix(web): close final workbench interaction gaps

apps/web_v1/scripts/workspace-refresh-gate.test.mjs

@@ -0,0 +1,34 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+import { createWorkspaceRefreshGate } from '../src/app/workspace-refresh-gate.ts'
+
+test('a newer full workspace refresh aborts and invalidates the previous generation', () => {
+  const gate = createWorkspaceRefreshGate()
+  const first = gate.begin()
+  const second = gate.begin()
+
+  assert.equal(first.signal.aborted, true)
+  assert.equal(first.isCurrent(), false)
+  assert.equal(second.signal.aborted, false)
+  assert.equal(second.isCurrent(), true)
+})
+
+test('a targeted origin-project refresh also supersedes an older full refresh', () => {
+  const gate = createWorkspaceRefreshGate()
+  const fullRefresh = gate.begin()
+  const originRefresh = gate.begin()
+
+  assert.equal(fullRefresh.signal.aborted, true)
+  assert.equal(fullRefresh.isCurrent(), false)
+  assert.equal(originRefresh.isCurrent(), true)
+})
+
+test('invalidating on session cleanup prevents stale workspace commits', () => {
+  const gate = createWorkspaceRefreshGate()
+  const request = gate.begin()
+
+  gate.invalidate()
+
+  assert.equal(request.signal.aborted, true)
+  assert.equal(request.isCurrent(), false)
+})