ci(e2e): exclude @perf tests from PR-time job

.github/workflows/ci-e2e.yml

@@ -29,7 +29,15 @@ jobs:
               run: pnpm --filter muya-e2e exec playwright install --with-deps chromium firefox webkit
 
             - name: 🎭 Run Playwright tests
-              run: pnpm e2e
+              # Exclude @perf-tagged tests on PR-time CI: their budgets were
+              # calibrated against a local dev box, not GHA ubuntu-latest +
+              # Vite dev server. Every browser overshoots there (chromium
+              # ~70s, firefox ~65s, webkit ~115s against the 60s budget),
+              # which causes deterministic fails and pushes the job past
+              # its 15min cap once retries kick in. The plan to move @perf
+              # to a nightly schedule against a production bundle is already
+              # documented in e2e/tests/stability/perf.spec.ts.
+              run: pnpm --filter muya-e2e exec playwright test --grep-invert "@perf"
               env:
                   CI: '1'