feat: add live draw feature and clean up docs

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/mobile/src/features/live-draw/utils/widgetBridge.ts

@@ -0,0 +1,22 @@
+import { Platform } from 'react-native';
+import { setWidgetData, reloadWidgets } from '../../../../modules/widget-bridge';
+import type { StrokeSegment } from '../types';
+import { renderStrokesToBase64 } from './widgetImageExport';
+
+export async function updateWidget(strokes: StrokeSegment[]): Promise<void> {
+  try {
+    const base64 = renderStrokesToBase64(strokes);
+    if (!base64) return;
+
+    if (Platform.OS === 'ios') {
+      setWidgetData('LiveDrawImage', base64);
+      reloadWidgets();
+    } else if (Platform.OS === 'android') {
+      setWidgetData('LiveDrawImage', base64);
+      reloadWidgets();
+    }
+  } catch (e) {
+    // Widget update is non-critical; don't crash the app
+    console.warn('Failed to update widget:', e);
+  }
+}