Objective

Commit the Playwright Profiling infrastructure and configuration changes established during the investigation of #9194.

Tasks

1. Playwright Config: Commit the updates to test/playwright/playwright.config.e2e.mjs (memory limit increase).
2. Profiler Test: Commit test/playwright/e2e/GridProfile.spec.mjs.
3. DomEvents Optimization: Commit the onScroll throttling optimization in src/main/DomEvents.mjs (16ms).

Rationale

These tools and optimizations are valuable for future performance regression testing and baseline maintenance, even if they didn't solve the specific Desktop 30fps issue.