feat: add zoom functionality to BookReader and related components, enabling zoom state management and touch gesture handling

src/components/reader/BookReader.tsx

@@ -19,6 +19,7 @@ export function BookReader({ book, pages, onClose, nextBook }: BookReaderProps)
   const [isDoublePage, setIsDoublePage] = useState(false);
   const [showControls, setShowControls] = useState(false);
   const [showThumbnails, setShowThumbnails] = useState(false);
+  const [isZoomed, setIsZoomed] = useState(false);
   const readerRef = useRef<HTMLDivElement>(null);
   const isLandscape = useOrientation();
   const { direction, toggleDirection, isRTL } = useReadingDirection();
@@ -43,6 +44,7 @@ export function BookReader({ book, pages, onClose, nextBook }: BookReaderProps)
     onClose,
     direction,
     nextBook,
+    isZoomed,
   });
 
   const { preloadPage, getPageUrl, cleanCache } = usePageCache({
@@ -138,6 +140,7 @@ export function BookReader({ book, pages, onClose, nextBook }: BookReaderProps)
             shouldShowDoublePage={shouldShowDoublePage}
             isRTL={isRTL}
             onThumbnailLoad={handleThumbnailLoad}
+            onZoomChange={setIsZoomed}
           />
 
           <NavigationBar

src/components/reader/components/ReaderContent.tsx

@@ -10,6 +10,7 @@ interface ReaderContentProps {
   shouldShowDoublePage: (page: number) => boolean;
   isRTL: boolean;
   onThumbnailLoad: (pageNumber: number) => void;
+  onZoomChange?: (isZoomed: boolean) => void;
 }
 
 export const ReaderContent = ({
@@ -22,6 +23,7 @@ export const ReaderContent = ({
   shouldShowDoublePage,
   isRTL,
   onThumbnailLoad,
+  onZoomChange,
 }: ReaderContentProps) => {
   return (
     <div className="relative flex-1 flex items-center justify-center overflow-hidden p-1">
@@ -34,6 +36,7 @@ export const ReaderContent = ({
           isDoublePage={isDoublePage}
           isRTL={isRTL}
           order="first"
+          onZoomChange={onZoomChange}
         />
 
         {isDoublePage && shouldShowDoublePage(currentPage) && (
@@ -45,6 +48,7 @@ export const ReaderContent = ({
             isDoublePage={true}
             isRTL={isRTL}
             order="second"
+            onZoomChange={onZoomChange}
           />
         )}
       </div>

src/components/reader/components/ZoomablePage.tsx

@@ -1,5 +1,6 @@
 import { TransformWrapper, TransformComponent } from "react-zoom-pan-pinch";
 import { cn } from "@/lib/utils";
+import { useState } from "react";
 
 interface ZoomablePageProps {
   pageUrl: string | null;
@@ -9,6 +10,7 @@ interface ZoomablePageProps {
   isDoublePage?: boolean;
   isRTL?: boolean;
   order?: "first" | "second";
+  onZoomChange?: (isZoomed: boolean) => void;
 }
 
 export const ZoomablePage = ({
@@ -19,7 +21,14 @@ export const ZoomablePage = ({
   isDoublePage = false,
   isRTL = false,
   order = "first",
+  onZoomChange,
 }: ZoomablePageProps) => {
+  const [currentScale, setCurrentScale] = useState(1);
+
+  const handleTransform = (ref: any, state: { scale: number; positionX: number; positionY: number }) => {
+    setCurrentScale(state.scale);
+    onZoomChange?.(state.scale > 1.1);
+  };
   return (
     <div
       className={cn(
@@ -55,6 +64,7 @@ export const ZoomablePage = ({
           panning={{ disabled: false }}
           limitToBounds={true}
           centerZoomedOut={false}
+          onTransformed={handleTransform}
         >
           <TransformComponent
             wrapperClass="w-full h-full flex items-center justify-center"

src/components/reader/hooks/usePageNavigation.ts

@@ -10,6 +10,7 @@ interface UsePageNavigationProps {
   onClose?: (currentPage: number) => void;
   direction: "ltr" | "rtl";
   nextBook?: KomgaBook | null;
+  isZoomed?: boolean;
 }
 
 export const usePageNavigation = ({
@@ -19,6 +20,7 @@ export const usePageNavigation = ({
   onClose,
   direction,
   nextBook,
+  isZoomed = false,
 }: UsePageNavigationProps) => {
   const router = useRouter();
   const cPage = ClientOfflineBookService.getCurrentPage(book);
@@ -133,25 +135,22 @@ export const usePageNavigation = ({
 
   const handleTouchStart = useCallback(
     (event: TouchEvent) => {
-      // Ne gérer que les gestes à un seul doigt
-      if (event.touches.length === 1) {
-        touchStartXRef.current = event.touches[0].clientX;
-        touchStartYRef.current = event.touches[0].clientY;
-        currentPageRef.current = currentPage;
-      } else {
-        // Reset les références pour les gestes multi-touch (pinch)
+      // Si on est zoomé, on ne gère pas la navigation
+      if (isZoomed) {
         touchStartXRef.current = null;
         touchStartYRef.current = null;
+        return;
       }
+      
+      touchStartXRef.current = event.touches[0].clientX;
+      touchStartYRef.current = event.touches[0].clientY;
+      currentPageRef.current = currentPage;
     },
-    [currentPage]
+    [currentPage, isZoomed]
   );
 
   const handleTouchEnd = useCallback(
     (event: TouchEvent) => {
-      // Ne traiter que les gestes à un seul doigt
-      if (event.touches.length > 1) return;
-      
       if (touchStartXRef.current === null || touchStartYRef.current === null) return;
 
       const touchEndX = event.changedTouches[0].clientX;
@@ -163,7 +162,7 @@ export const usePageNavigation = ({
       // on ne fait rien (pour éviter de confondre avec un scroll)
       if (Math.abs(deltaY) > Math.abs(deltaX)) return;
 
-      // Augmenter le seuil pour éviter les changements de page accidentels
+      // Seuil pour éviter les changements de page accidentels
       if (Math.abs(deltaX) > 100) {
         if (deltaX > 0) {
           // Swipe vers la droite