chore: standardize on Node 24 (#9521)

## Summary

Standardize the repo's Node contract on 24 while centralizing workflow
resolution through `.nvmrc` so local setup, CI, and package metadata
stay aligned from one version file.

## Changes

- **What**: Add `package.json` `engines.node = 24.x`, switch every
`actions/setup-node` workflow in the repo to `node-version-file:
'.nvmrc'`, and update contributor and Playwright docs to point to
`.nvmrc` as the Node source of truth.

## Review Focus

The workflow behavior should be unchanged apart from sourcing the Node
version from `.nvmrc` instead of repeating literals like `20`, `22`,
`24.x`, or `lts/*`. GitHub's formatter also moved the new `engines`
block to the package metadata section near the end of `package.json`.

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Alexander Brown <drjkl@comfy.org>

.github/workflows/api-update-electron-api-types.yaml

@@ -23,7 +23,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: lts/*
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Update electron types

.github/workflows/api-update-manager-api-types.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: lts/*
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies

.github/workflows/api-update-registry-api-types.yaml

@@ -27,7 +27,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: lts/*
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies

.github/workflows/ci-dist-telemetry-scan.yaml

@@ -26,7 +26,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies

.github/workflows/ci-oss-assets-validation.yaml

@@ -27,7 +27,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies
@@ -82,7 +82,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies

.github/workflows/pr-claude-review.yaml

@@ -36,7 +36,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies for analysis tools

.github/workflows/pr-perf-report.yaml

@@ -25,7 +25,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v6
         with:
-          node-version: 22
+          node-version-file: '.nvmrc'
 
       - name: Download PR metadata
         uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392 # v12

.github/workflows/publish-desktop-ui-on-merge.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '24.x'
+          node-version-file: '.nvmrc'
 
       - name: Read desktop-ui version
         id: get_version

.github/workflows/publish-desktop-ui.yaml

@@ -91,7 +91,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '24.x'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
           registry-url: https://registry.npmjs.org
 

.github/workflows/release-biweekly-comfyui.yaml

@@ -82,7 +82,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: lts/*
+          node-version-file: 'frontend/.nvmrc'
 
       - name: Install dependencies
         working-directory: frontend

.github/workflows/release-branch-create.yaml

@@ -26,7 +26,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
 
       - name: Check version bump type
         id: check_version

.github/workflows/release-draft-create.yaml

@@ -26,7 +26,7 @@ jobs:
           version: 10
       - uses: actions/setup-node@v6
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Get current version

.github/workflows/release-npm-types.yaml

@@ -82,7 +82,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
           registry-url: https://registry.npmjs.org
 

.github/workflows/release-pypi-dev.yaml

@@ -22,7 +22,7 @@ jobs:
           version: 10
       - uses: actions/setup-node@v6
         with:
-          node-version: 'lts/*'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Get current version

.github/workflows/release-version-bump.yaml

@@ -149,7 +149,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: lts/*
+          node-version-file: '.nvmrc'
 
       - name: Bump version
         id: bump-version

.github/workflows/version-bump-desktop-ui.yaml

@@ -58,7 +58,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '24.x'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Bump desktop-ui version

.github/workflows/weekly-docs-check.yaml

@@ -35,7 +35,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version-file: '.nvmrc'
           cache: 'pnpm'
 
       - name: Install dependencies for analysis tools