Fix: Isolate Widget CSS to Prevent Host Page Style Conflicts
Problem
Widget's global CSS (especially Tailwind base reset) was injecting into host pages and overriding their styles, causing conflicts and breaking host page layouts.
Solution
Implemented selector-based CSS scoping. All widget styles are now scoped to .vapi-widget-wrapper container.
CSS Generation
Before: .flex { display: flex; } (global, affects host page)
After: .vapi-widget-wrapper .flex { display: flex !important; } (scoped, isolated)