feat: <qr> widget — QR code generation with live binding#4
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New widget: <qr size="220" dark="#000" light="#fff">{payload}</qr>
- Wraps LVGL lv_qrcode
- Live update: QR re-renders when bound state changes
- Attributes: size, dark, light, align, x, y
- CSS support via .class
Modified:
- lv_conf.h — LV_USE_QRCODE 1
- ui_widget_builder.cpp — create_qr()
- ui_html.cpp — parse <qr> tag
- ui_html_internal.h — create_qr declaration
- ui_types.h — Element::Qr
Includes apps_qrdemo.bax example (WiFi QR, URL QR).
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QR Code Widget
lv_qrcodesize,dark,light,align,x,yIncludes
apps_qrdemo.baxexample (WiFi QR + URL QR).Depends on: PR #3 (sdcard, same files modified)
64/64 tests pass.