bump @playwright/test to 1.63.0 (user-approved re-pin)

Re-pin to the cached chromium-1243 revision; full E2E suite green on
1.63.0. Approval recorded in the PLAN.md review history.

LLM-Generated: true

package.json

@@ -9,6 +9,6 @@
     "test:headed": "playwright test --headed"
   },
   "devDependencies": {
-    "@playwright/test": "1.62.0"
+    "@playwright/test": "1.63.0"
   }
 }