Converge frontend to Yarn Berry with global cache

.github/copilot-instructions.md

@@ -19,7 +19,7 @@ cd apiserver && golangci-lint run                    # Lint
 cd apiserver && go test ./...                        # Test
 
 # Frontend
-cd frontend && yarn install --frozen-lockfile        # Install deps
+cd frontend && yarn install --immutable             # Install deps
 cd frontend && yarn lint                             # Lint
 cd frontend && yarn tsc                              # Type check
 cd frontend && yarn build                            # Build (Vite)

.github/workflows/cut-release.yml

@@ -14,10 +14,16 @@ jobs:
     - uses: actions/checkout@v4
       with:
         token: ${{ secrets.WORKFLOW_TOKEN }}
+    - name: Use Node.js 24.x
+      uses: actions/setup-node@v4
+      with:
+        node-version: 24.x
+    - name: Enable Corepack
+      run: corepack enable
     - name: Bump frontend version
       run: |
         cd frontend
-        yarn version --patch --no-git-tag-version
+        yarn version patch
     - name: Get the latest tag
       id: get_latest_tag
       env:

.github/workflows/frontend-build.yml

@@ -23,10 +23,21 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: 24.x
-        cache: 'yarn'
-        cache-dependency-path: frontend/yarn.lock
+    - name: Enable Corepack
+      run: corepack enable
+    - name: Get Yarn cache folder
+      id: yarn-cache
+      run: echo "dir=$(yarn config get cacheFolder)" >> "$GITHUB_OUTPUT"
+      working-directory: frontend
+    - name: Cache Yarn dependencies
+      uses: actions/cache@v4
+      with:
+        path: ${{ steps.yarn-cache.outputs.dir }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('frontend/yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-yarn-
     - name: Install dependencies
-      run: yarn install --frozen-lockfile
+      run: yarn install --immutable
       working-directory: frontend
     - name: Lint
       run: yarn lint

.github/workflows/full-release.yml

@@ -24,10 +24,12 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 24.x
+      - name: Enable Corepack
+        run: corepack enable
       - name: Install Dependencies
         run: |
           cd frontend
-          yarn install
+          yarn install --immutable
       - name: Build Frontend
         run: |
           export VITE_BACKEND_VERSION=$(git tag --sort=-creatordate | sed -n '1p' | sed 's/^v//')

frontend/.gitignore

@@ -4,13 +4,19 @@
 dist
 node_modules
 
-.yarn/
-.yarnrc.yml
-
 # Test coverage
 coverage
 
 # Playwright
 test-results/
 playwright-report/
 playwright/.cache/
+
+# Yarn
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+.pnp.*

frontend/.yarnrc.yml

@@ -0,0 +1,9 @@
+enableGlobalCache: true
+
+enableScripts: true
+
+nmMode: hardlinks-global
+
+nodeLinker: node-modules
+
+npmMinimalAgeGate: 4320