v0.11.4

What changed

• Add --browser-engine auto|native|cef to generated app creation.
• Auto-enable CEF/Chromium for YouTube and YouTube Music recipes.
• Generate Electrobun CEF config with bundleCEF, defaultRenderer: "cef", and a desktop Chrome user-agent flag for Chromium-sniffing sites.
• Record browser engine and compatibility notes in appbun.generated.json and generated READMEs.
• Expose browser engine selection through MCP and agent prompts.

Why

YouTube Music can show a "download Chrome" / unsupported browser screen inside native system webviews. CEF mode gives those apps a Chromium renderer instead of WebKit/WebView2/GTK WebKit defaults.

Verified

• bun run check
• bun run test
• npm pack --dry-run
• appbun youtube-music --show-config resolves browserEngine: cef
• scaffold smoke emits bundleCEF: true, defaultRenderer: "cef", Chrome UA, README compatibility notes, and manifest engine: cef