feat: Add Windows Playwright test fixes to RC (#12265)

* feat: Add Windows Playwright tests to nightly builds

- Add windows-latest to typescript_test.yml runner options
- Add shell: bash to all script steps for cross-platform compatibility
- Split Playwright installation into OS-aware steps (Linux uses --with-deps, Windows/macOS/self-hosted don't)
- Fix artifact naming with OS prefix to prevent conflicts: blob-report-${{ runner.os }}-${{ matrix.shardIndex }}
- Split frontend-tests into separate Linux and Windows jobs in nightly_build.yml
- Add ref parameter to all test jobs to checkout code from release branch
- Add resolve-release-branch to needs dependencies
- Update Slack notifications to handle both Linux and Windows test results
- Windows tests are non-blocking (not checked in release-nightly-build condition)
- Update .secrets.baseline with new line number (263 -> 347) for LANGFLOW_ENG_SLACK_WEBHOOK_URL

Fixes LE-566

* fix: Use contains() for self-hosted runner detection

- Replace exact string equality (==, !=) with contains() for substring matching
- Fixes issue when inputs.runs-on is array format: '["self-hosted", "linux", "ARM64", ...]'
- Ensures self-hosted Linux runners correctly skip --with-deps flag

Addresses CodeRabbit feedback on PR #12264

.github/workflows/nightly_build.yml

@@ -208,12 +208,13 @@ jobs:
   frontend-tests-linux:
     if: github.repository == 'langflow-ai/langflow' && !inputs.skip_frontend_tests
     name: Run Frontend Tests - Linux
-    needs: create-nightly-tag
+    needs: [resolve-release-branch, create-nightly-tag]
     uses: ./.github/workflows/typescript_test.yml
     with:
       tests_folder: "tests"
       release: true
       runs-on: ubuntu-latest
+      ref: ${{ needs.resolve-release-branch.outputs.branch }}
     secrets:
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
       STORE_API_KEY: ${{ secrets.STORE_API_KEY }}
@@ -223,16 +224,16 @@ jobs:
   frontend-tests-windows:
     if: github.repository == 'langflow-ai/langflow' && !inputs.skip_frontend_tests
     name: Run Frontend Tests - Windows
-    needs: create-nightly-tag
-    # Allow Windows tests to fail without blocking the nightly build
-    # This gives us visibility into Windows-specific issues while we stabilize the tests
-    # Remove this once Windows tests are consistently passing
-    continue-on-error: true
+    needs: [resolve-release-branch, create-nightly-tag]
+    # Windows tests are non-blocking - the release-nightly-build job only checks
+    # frontend-tests-linux.result, allowing Windows tests to fail without blocking the build.
+    # This gives us visibility into Windows-specific issues while we stabilize the tests.
     uses: ./.github/workflows/typescript_test.yml
     with:
       tests_folder: "tests"
       release: true
       runs-on: windows-latest
+      ref: ${{ needs.resolve-release-branch.outputs.branch }}
     secrets:
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
       STORE_API_KEY: ${{ secrets.STORE_API_KEY }}
@@ -242,11 +243,12 @@ jobs:
   backend-unit-tests:
     if: github.repository == 'langflow-ai/langflow' && !inputs.skip_backend_tests
     name: Run Backend Unit Tests
-    needs: create-nightly-tag
+    needs: [resolve-release-branch, create-nightly-tag]
     uses: ./.github/workflows/python_test.yml
     with:
       python-versions: '["3.10", "3.11", "3.12", "3.13"]'
       runs-on: ${{ inputs['runs_on'] || github.event.inputs['runs_on'] || 'ubuntu-latest' }}
+      ref: ${{ needs.resolve-release-branch.outputs.branch }}
     secrets:
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
       ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}

.github/workflows/typescript_test.yml

@@ -314,14 +314,14 @@ jobs:
             playwright-${{ env.PLAYWRIGHT_VERSION }}-chromium-${{ runner.os }}
 
       - name: Install Playwright Browser Dependencies (Linux)
-        if: steps.cache-playwright.outputs.cache-hit != 'true' && runner.os == 'Linux' && inputs.runs-on != 'self-hosted'
+        if: steps.cache-playwright.outputs.cache-hit != 'true' && runner.os == 'Linux' && !contains(inputs.runs-on, 'self-hosted')
         shell: bash
         run: |
           cd ./src/frontend
           npx playwright install --with-deps chromium
 
       - name: Install Playwright Browsers (Windows/macOS/Self-Hosted)
-        if: steps.cache-playwright.outputs.cache-hit != 'true' && (runner.os != 'Linux' || inputs.runs-on == 'self-hosted')
+        if: steps.cache-playwright.outputs.cache-hit != 'true' && (runner.os != 'Linux' || contains(inputs.runs-on, 'self-hosted'))
         shell: bash
         run: |
           cd ./src/frontend
@@ -362,7 +362,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v6
         with:
-          name: blob-report-${{ matrix.shardIndex }}
+          name: blob-report-${{ runner.os }}-${{ matrix.shardIndex }}
           path: src/frontend/blob-report
           retention-days: 1