ci: run web replay on master linux

scripts/run-gates.spec.ts

@@ -57,6 +57,7 @@ function withEnv<T>(name: string, value: string | undefined, action: () => T): T
 describe('gate graph validation', () => {
   it.each([
     'ci-primary',
+    'ci-linux-primary',
     'ci-static',
     'ci-lint',
     'ci-coverage',
@@ -166,6 +167,19 @@ describe('Node 24 consumer graph', () => {
   })
 })
 
+describe('Linux primary graph', () => {
+  it('adds the same compare-only web gate after built client artifacts', () => {
+    const subject = withPnpmEntrypoint(() => gatesForMode('ci-linux-primary'))
+    const web = subject.find(item => item.id === 'web-snapshot')
+
+    expect(web).toMatchObject({
+      displayCommand: 'DSH_SNAPSHOT=replay pnpm run test:web:built',
+      env: { DSH_SNAPSHOT: 'replay' },
+      needs: ['built-package-invariants'],
+    })
+  })
+})
+
 describe('gate process outcomes', () => {
   it.skipIf(process.platform === 'win32')('reports signal termination independently from exit status', async () => {
     const result = await runGate(gate('terminated', {