ci(perf): add the weekly baseline tightening workflow (#1760)

.github/workflows/ci.yml

@@ -321,61 +321,10 @@ jobs:
             - name: Install dependencies
               run: pnpm install --frozen-lockfile
 
-            # The journeys drive Electron through Playwright's _electron API
-            # and never launch a Playwright browser, so no `playwright
-            # install`. The runner image ships Electron's shared libraries and
-            # xvfb; fail fast with a clear message if an image update drops one.
-            # pnpm skips Electron's postinstall, so download the binary first;
-            # otherwise ldd sees no file and the check passes vacuously.
-            - name: Check Electron runtime dependencies
-              run: |
-                  command -v xvfb-run || { echo "::error::xvfb-run is missing on the runner"; exit 1; }
-                  node tools/testing/ensure-electron-binary.mjs || { echo "::error::Electron binary download failed"; exit 1; }
-                  missing="$(ldd node_modules/electron/dist/electron | grep 'not found' || true)"
-                  if [ -n "$missing" ]; then
-                      echo "::error::Electron is missing shared libraries:"
-                      echo "$missing"
-                      exit 1
-                  fi
-
-            # The Nx target builds electron-backend:build-performance first
-            # and playwright.journeys.config.ts starts the Xtream mock server.
+            # Electron dependency check, the xvfb run, the summary lookup and
+            # the job-summary report; shared with performance-ratchet.yml.
             - name: Run the performance journeys
-              run: xvfb-run --auto-servernum --server-args="-screen 0 1280x960x24" pnpm run perf:journeys
-              env:
-                  CI: true
-                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false
-
-            # Every run writes a fresh timestamped directory, so a clean
-            # checkout must hold exactly one summary.
-            - name: Locate the journey summary
-              id: summary
-              run: |
-                  set -euo pipefail
-                  mapfile -t summaries < <(find dist/performance/journeys -mindepth 2 -maxdepth 2 -name summary.json)
-                  if [ "${#summaries[@]}" -ne 1 ]; then
-                      echo "::error::Expected one journey summary, found ${#summaries[@]}"
-                      exit 1
-                  fi
-                  echo "path=${summaries[0]}" >> "$GITHUB_OUTPUT"
-
-            - name: Report journey measurements
-              env:
-                  SUMMARY: ${{ steps.summary.outputs.path }}
-              run: |
-                  set -euo pipefail
-                  jq -r '
-                      "## Performance journeys (\(.harness.platform), \(.harness.measuredIterations) measured iterations)", "",
-                      (.journeys | to_entries[] | .key as $journey | .value as $j |
-                          "### `\($journey)`", "",
-                          "| Measurement | Value | Iterations |",
-                          "| --- | ---: | --- |",
-                          (($j.counters // {}) | to_entries[] |
-                              ($j.counterStability[.key] // {}) as $s |
-                              "| `\(.key)` | \(.value) | \(($s.values // []) | map(tostring) | join(", "))\(if $s.stable == false then " (unstable)" else "" end) |"),
-                          (($j.wallClock // {}) | to_entries[] | "| `\(.key)` | \(.value) | |"),
-                          "")
-                  ' "$SUMMARY" | tee -a "$GITHUB_STEP_SUMMARY"
+              uses: ./.github/actions/performance-journeys
 
             - name: Upload journey summaries
               if: always()