ci: address review feedback for Windows CI unification

- Rewrite ci-workflow.spec.ts to assert new single-job native Windows topology
- Remove check:windows-wine from root AGENTS.md command list
- Archive 2026-08-08-native-windows-pull-request-ci (dual-lane topology
  superseded) with Archived: metadata and inbound-link updates
- Update cross-references in serial-cross-platform-ci-reference,
  portable-required-pull-request-ci, and pnpm-action-setup notes
- Add Windows pool coverage to the failover runbook (EN + zh)
- Remove dead wine-windows-gates.sh
- Remove unnecessary Playwright Chromium install from serial-windows
- Fix .github/AGENTS.md windows-* label wording
- Fix PR description before-state accuracy

.github/AGENTS.md

@@ -1,3 +1,3 @@
 # AGENTS.md — GitHub Actions
 
-Run jobs on Windows runners (`windows-*` labels) under native `pwsh`. The required pull-request `windows` job and the master `serial-windows` standby both run on real Windows; the self-hosted pool uses labels `[self-hosted, dsh-win-ci, windows]`. Under failover (`DSH_CI_FAILOVER=selfhosted`) the `windows` job retargets onto the self-hosted pool.
+Run Windows CI jobs under native `pwsh`. The required pull-request `windows` job and the master `serial-windows` standby both run on real Windows: normally on the hosted enterprise runner, failing over to the self-hosted `[self-hosted, dsh-win-ci, windows]` pool under `DSH_CI_FAILOVER=selfhosted`.

.github/workflows/ci.yml

@@ -561,13 +561,6 @@ jobs:
         shell: pwsh
         run: pnpm install --frozen-lockfile
 
-      # The persistent VM image owns Playwright's Windows system dependencies;
-      # this step also proves that browser provisioning remains usable for
-      # failover.
-      - name: Install Playwright Chromium
-        shell: pwsh
-        run: pnpm --filter @deepseek-ai/dsh-frontend exec playwright install chromium
-
       - name: Run complete unsharded Windows gate inventory serially
         shell: pwsh
         env: