docs: Add CLAUDE.md with project-specific guidance

- Document pre-push test timeout issue and workaround
- Reference ai-skills for translation workflow
- Note translation file conventions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kwschulz

CLAUDE.md

@@ -0,0 +1,25 @@
+# Claude Rules
+
+## Pre-Push Tests
+
+This repo has a pre-push hook that runs Playwright tests. The dev server must start before tests run.
+
+**Known issue:** Cold starts can timeout (120s limit). If push fails with "Timed out waiting for webServer":
+1. Run `npm run dev` manually first to warm up
+2. Or run `npm test` before pushing
+3. Then retry the push
+
+## AI Skills
+
+See `ai-skills/website-translation.md` for the i18n workflow.
+
+## Translation Workflow
+
+- Source of truth: `src/i18n/en.json`
+- Generated translations: `src/i18n/generated/*.json`
+- Never manually edit generated files - regenerate using the translation skill
+
+## Build & Deploy
+
+- `npm run build` generates static site to `dist/`
+- GitHub Pages deploys from `dist/` on push to main