Add screenshot-dev-app agent skill

[Twixes]

Summary

• Adds .claude/skills/screenshot-dev-app/SKILL.md for visually verifying PostHog Code UI changes via the Vite web preview (localhost:5173/?previewMode=true).
• Documents navigate → snapshot → screenshot workflow using cursor-ide-browser (no Electron / screencapture).
• Includes route map, mock report ids, and where to extend preview fixtures in apps/code/index.html.

Test plan

• Skill file renders correctly in the repo
• Follow skill: open http://localhost:5173/?previewMode=true#/code/inbox/pulls with dev server running
• Confirm browser_take_screenshot captures the inbox list with mock data

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 7636be5.}

[greptile-apps]

Prompt To Fix All With AI

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

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### Issue 1 of 1
.claude/skills/screenshot-dev-app/SKILL.md:37
**Mismatched table column count**

The "Task detail" row has a third column (`Needs a real task id`) but the table only declares two headers (`View` and `Hash route`). Most Markdown renderers (including GitHub) will render this third cell without a header, resulting in a stray column. The note would be cleaner as a parenthetical inside the hash-route cell, e.g. `` `#/code/tasks/<taskId>` (needs a real task id) ``.

_{Reviews (1): Last reviewed commit: "Add screenshot-dev-app skill for web pre..." | Re-trigger Greptile}