Initial commit: MangaReader iOS App

✨ Features:
- App iOS completa para leer manga sin publicidad
- Scraper con WKWebView para manhwaweb.com
- Sistema de descargas offline
- Lector con zoom y navegación
- Favoritos y progreso de lectura
- Compatible con iOS 15+ y Sideloadly/3uTools

📦 Contenido:
- Backend Node.js con Puppeteer (opcional)
- App iOS con SwiftUI
- Scraper de capítulos e imágenes
- Sistema de almacenamiento local
- Testing completo
- Documentación exhaustiva

🧪 Prueba: Capítulo 789 de One Piece descargado exitosamente
  - 21 páginas descargadas
  - 4.68 MB total
  - URLs verificadas y funcionales

🎉 Generated with Claude Code (https://claude.com/claude-code)

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

backend/node_modules/axios/lib/helpers/progressEventReducer.js

@@ -0,0 +1,44 @@
+import speedometer from "./speedometer.js";
+import throttle from "./throttle.js";
+import utils from "../utils.js";
+
+export const progressEventReducer = (listener, isDownloadStream, freq = 3) => {
+  let bytesNotified = 0;
+  const _speedometer = speedometer(50, 250);
+
+  return throttle(e => {
+    const loaded = e.loaded;
+    const total = e.lengthComputable ? e.total : undefined;
+    const progressBytes = loaded - bytesNotified;
+    const rate = _speedometer(progressBytes);
+    const inRange = loaded <= total;
+
+    bytesNotified = loaded;
+
+    const data = {
+      loaded,
+      total,
+      progress: total ? (loaded / total) : undefined,
+      bytes: progressBytes,
+      rate: rate ? rate : undefined,
+      estimated: rate && total && inRange ? (total - loaded) / rate : undefined,
+      event: e,
+      lengthComputable: total != null,
+      [isDownloadStream ? 'download' : 'upload']: true
+    };
+
+    listener(data);
+  }, freq);
+}
+
+export const progressEventDecorator = (total, throttled) => {
+  const lengthComputable = total != null;
+
+  return [(loaded) => throttled[0]({
+    lengthComputable,
+    total,
+    loaded
+  }), throttled[1]];
+}
+
+export const asyncDecorator = (fn) => (...args) => utils.asap(() => fn(...args));