Convert Stitch designs into uni-app + Vue 2 + uView 2.0 pages and components. Use when the user mentions uView, uView 2, or uni-app Vue 2 conversion from Stitch. Retrieves screen HTML via Stitch MCP get_screen, maps Tailwind to rpx/theme, enforces uni-app page structure with uView 2 u-* components (u-navbar, u-form, u-button, u-cell-group).