ci: bump skill matrix parser test timeout; install playwright in isolated dir

Unit Tests flaked on QNAP: skillMatrixParser ExcelJS workbook builds exceeded
the 5s default per-test timeout (runtime ~8.6s for the suite). Bumped to 30s.

Docker Deploy smoke tests failed because `npm install` in the repo root tried
to resolve sibling workspace:* deps (pnpm protocol, not npm-supported).
Install @playwright/test into /tmp/pw-install instead and symlink the package
dirs into apps/web/node_modules so the CJS require() in playwright.ci.config.ts
resolves it by walking up from apps/web/.

.github/workflows/ci.yml

@@ -496,20 +496,29 @@ jobs:
           node-version: "20"
 
       - name: Install Playwright and Chromium
-        # Install locally (not -g) so the CJS require() in playwright.ci.config.ts
-        # resolves @playwright/test by walking up from apps/web/. A global
-        # install puts it in /opt/hostedtoolcache/.../lib/node_modules which
-        # Node's resolver doesn't check.
+        # The repo root package.json uses pnpm `workspace:*` deps which npm
+        # cannot resolve, so install into an isolated temp dir and symlink
+        # @playwright/test into apps/web/node_modules so playwright.ci.config.ts
+        # (CJS) can resolve it by walking up from apps/web/.
         run: |
+          set -e
+          mkdir -p /tmp/pw-install
+          cd /tmp/pw-install
+          [ -f package.json ] || npm init -y >/dev/null
           npm install --no-save --no-package-lock @playwright/test@1.49
-          npx playwright install chromium --with-deps
+          cd "$GITHUB_WORKSPACE"
+          mkdir -p apps/web/node_modules
+          ln -sfn /tmp/pw-install/node_modules/@playwright apps/web/node_modules/@playwright
+          ln -sfn /tmp/pw-install/node_modules/playwright apps/web/node_modules/playwright
+          ln -sfn /tmp/pw-install/node_modules/playwright-core apps/web/node_modules/playwright-core
+          /tmp/pw-install/node_modules/.bin/playwright install chromium --with-deps
 
       - name: Run smoke tests
         env:
           # App runs on the compose network; act_runner job is on gitea_gitea
           # (docker-compose.ci.yml attaches services to both). Override baseURL.
           PLAYWRIGHT_BASE_URL: http://app:3100
-        run: npx playwright test --config apps/web/playwright.ci.config.ts
+        run: /tmp/pw-install/node_modules/.bin/playwright test --config apps/web/playwright.ci.config.ts
 
       - name: Upload Playwright report
         if: failure()