ci: use pnpm for desktop job

Author: cuihairu

.github/workflows/ci.yml

@@ -57,25 +57,27 @@ jobs:
   desktop:
     name: Desktop (Tauri + React)
     runs-on: ubuntu-latest
-    defaults:
-      run:
-        working-directory: desktop
     steps:
       - uses: actions/checkout@v4
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
           node-version: '20'
-          cache: 'npm'
-          cache-dependency-path: desktop/package-lock.json
+          cache: 'pnpm'
+          cache-dependency-path: pnpm-lock.yaml
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+          run_install: false
       - name: Install deps
-        run: npm ci
+        run: pnpm install --frozen-lockfile
       - name: Lint
-        run: npm run lint
+        run: pnpm --filter persona-desktop run lint
       - name: Tests
-        run: npm test -- --ci --reporters=default --reporters=jest-junit
+        run: pnpm --filter persona-desktop run test -- --ci --reporters=default --reporters=jest-junit
       - name: Security Audit
-        run: npm audit --audit-level=moderate
+        run: pnpm --filter persona-desktop audit --audit-level=moderate
         continue-on-error: true # Don't fail CI on moderate vulnerabilities
 
   web: