fix: target registered Windows runner

Match staging validation and deployment jobs to the runner label registered in Gitea.

.gitea/workflows/backend-quality-gate.yml

@@ -22,7 +22,7 @@ concurrency:
 
 jobs:
   validate:
-    runs-on: runner-win
+    runs-on: manman-win
     timeout-minutes: 30
     defaults:
       run:
@@ -77,7 +77,7 @@ jobs:
   publish-and-deploy:
     if: gitea.event_name == 'push' && gitea.ref == 'refs/heads/staging'
     needs: validate
-    runs-on: runner-win
+    runs-on: manman-win
     timeout-minutes: 45
     defaults:
       run:

frontend/tests/staging-backend-workflows.test.ts

@@ -382,7 +382,7 @@ test("production remains manual-only and separate from staging database automati
 
 test("Gitea staging push uses the Windows runner and immutable ACR images", () => {
   const workflow = read(giteaQualityWorkflow);
-  assert.match(workflow, /runs-on: runner-win/);
+  assert.match(workflow, /runs-on: manman-win/);
   assert.match(workflow, /shell: powershell/);
   assert.match(workflow, /crpi-d1feco6itet73spp\.cn-hongkong\.personal\.cr\.aliyuncs\.com\/copse\/jyotisha/);
   assert.match(workflow, /secrets\.REGISTRY_USERNAME/);