ci: removes redundant Playwright Chromium download in CI

playwright.config.ts already sets channel: "chrome" on the chromium
project, which resolves to the system's branded Google Chrome via
Playwright's registry — ubuntu-latest ships Chrome/Chromium/Edge/
Firefox preinstalled. The npx playwright install chromium --with-deps
step downloaded a separate Playwright-managed Chromium build that the
config never launches, and its apt-based --with-deps step is pure
network/CPU overhead once you're on channel: "chrome" (the
preinstalled Chrome already carries its own working runtime
dependencies). Removing the step entirely eliminates this dead work
and the associated network-flake exposure it introduced.

Author: wgordon17

.github/workflows/ci.yml

@@ -18,8 +18,9 @@ jobs:
         run: bash scripts/verify-csp-hash.sh
       - run: pnpm run typecheck
       - run: pnpm test
-      - name: Install Playwright browsers
-        run: npx playwright install chromium --with-deps
+      # No `playwright install` step: playwright.config.ts uses channel: "chrome",
+      # which resolves to ubuntu-latest's preinstalled Google Chrome — Playwright's
+      # own bundled Chromium download is never used and would be wasted work.
       - name: Run E2E tests
         run: pnpm test:e2e
         env: