Capture screenshots with Playwright and send them to Slack with context.
Use this skill when you need to:
(1) Share visual evidence of a bug, UI state, or test result
(2) Document the current state of a page for review
(3) Send automated screenshot reports during E2E testing
(4) Provide visual context for debugging discussions
Triggers: "screenshot to slack", "send screenshot", "capture and share", "share this page"