test: keep jsdom's localStorage under Node 26

.github/workflows/pr.yml

@@ -61,6 +61,20 @@ jobs:
       - run: pnpm install --frozen-lockfile
       - run: pnpm test
 
+  test-node-26:
+    name: 3 - test (node 26)
+    runs-on: ubuntu-latest
+    if: github.event.action != 'edited'
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - run: corepack enable
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: 26
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm test
+
   commitlint:
     name: 4 - commitlint
     runs-on: ubuntu-latest

canton-connect/vitest.config.ts

@@ -6,6 +6,8 @@ export default defineConfig({
   test: {
     environment: 'jsdom',
     setupFiles: ['./vitest.setup.ts'],
+    // Node 26's own localStorage global shadows jsdom's under vitest 4; vitest 5 fixes it.
+    execArgv: ['--no-experimental-webstorage'],
     // The suite's wall clock is SDK timer waits, not CPU; without an explicit count,
     // core-starved CI runners get too few workers to overlap the files.
     maxWorkers: 8,

canton-dappbooster/vitest.config.ts

@@ -6,6 +6,8 @@ export default defineConfig({
   test: {
     environment: 'jsdom',
     setupFiles: ['./vitest.setup.ts'],
+    // Node 26's own localStorage global shadows jsdom's under vitest 4; vitest 5 fixes it.
+    execArgv: ['--no-experimental-webstorage'],
     // A stub or spy surviving into the next test is an order-dependent pass; undo both centrally.
     restoreMocks: true,
     unstubGlobals: true,

dapp/frontend/vite.config.ts

@@ -33,6 +33,8 @@ export default defineConfig(({ mode }) => {
     // jsdom despite no DOM assertions: the wallet SDK touches DOM globals on import.
     test: {
       environment: 'jsdom',
+      // Node 26's own localStorage global shadows jsdom's under vitest 4; vitest 5 fixes it.
+      execArgv: ['--no-experimental-webstorage'],
     },
   }
 })