Task 053: Playwright E2E Tests for Report Rendering

Status: DONE

Motivation

Human directive: Markdown の表が壊れるなど表示が壊れている。Playwright E2E test を組むなどして防ぐこと。

Scope

1. Add Playwright as dev dependency
2. Create E2E test suite that:

- Builds the site

- Opens each page in headless browser

- Verifies markdown tables render correctly

- Checks orbital diagrams render (SVG visible)

- Verifies no JS errors on pages with WASM/animation

- Checks responsive layout

1. Add to CI pipeline
2. Use Playwright CLI for debugging

Notes

• This catches rendering bugs that unit tests can't detect
• Focus on visual correctness, not pixel-perfect screenshots