chore: repair pnpm lockfile and pin prettier 3.9.6

Remove the duplicate @vuepress/helper snapshot that broke
--frozen-lockfile, bump prettier to the 3.9.x CI was already
resolving under ^3.8.1, freeze installs in workflows, and pin
format-docs to the same prettier version.

Closes #2036

Author: Swamp-Ig

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
           cache: pnpm
       - name: pnpm install
-        run: pnpm install
+        run: pnpm install --frozen-lockfile
       - name: Install exact version of node-red
         run: pnpm add -D node-red@${{ matrix.node-red-version }}
       - name: pnpm lint
@@ -84,7 +84,7 @@ jobs:
         with:
           cache: pnpm
       - name: pnpm install
-        run: pnpm install
+        run: pnpm install --frozen-lockfile
       - name: Pack
         run: pnpm pack
       - name: Upload Release Asset

.github/workflows/documentation.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           node-version: 22
           cache: pnpm
-      - run: pnpm install
+      - run: pnpm install --frozen-lockfile
       - run: pnpm docs:build
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v4

.github/workflows/format-docs.yml

@@ -23,6 +23,7 @@ jobs:
         if: github.event.pull_request.head.repo.full_name == github.repository
         uses: creyD/prettier_action@v4.5
         with:
+          prettier_version: 3.9.6
           prettier_options: --write docs/**/*.md
           only_changed: True
           same_commit: True
@@ -32,5 +33,6 @@ jobs:
         uses: creyD/prettier_action@v4.5
         with:
           # GITHUB_TOKEN cannot push to a fork; check only
+          prettier_version: 3.9.6
           prettier_options: --check docs/**/*.md
           only_changed: True

.github/workflows/publish.yml

@@ -17,6 +17,6 @@ jobs:
           node-version: "20"
           registry-url: "https://registry.npmjs.org"
       - name: Install dependencies and build 🔧
-        run: pnpm install
+        run: pnpm install --frozen-lockfile
       - name: Publish package on NPM
         run: pnpm publish

package.json

@@ -117,7 +117,7 @@
     "node-red": "^4.1.3",
     "node-red-node-test-helper": "^0.3.6",
     "postcss": "^8.5.6",
-    "prettier": "^3.8.1",
+    "prettier": "^3.9.6",
     "sass": "^1.97.3",
     "typescript": "^5.9.3",
     "vitest": "^4.0.16",