(fix)mobile: Improve the gallery to improve scale, double tap, and swipe gesture detection (#1502)

* photoviewgallery

* stiffer scrolling to react more like google photos

* adds a dx threshhold for the swipe/up down from the original dropped point

* stopped wrapping imageview in gallery viewer to avoid the double photoview issue. breaks imageview page pinch-to-zoom, so i need to fix that for other callers

* refactors gallery view to use remoteimage directly and breaks imageviewpage

* removed image_viewer_page

* adds minscale

* adds photo_view to repository

* double tap to zoom out with hacked commit

* double tapping!

* got up and down swipe gestures working

* fixed wrong cache and headers in image providers

* fixed image quality and added videos back in

* local loading asset image fix

* precaches images

* fixes lint errors

* deleted remote_photo_view and more linters

* fixes scale

* load preview and load original

* precache does original / preview as well

* refactored image providers to nice functions and added JPEG thumbnail format to remote image thumbnail lookup

* moved photo_view to shared/ui/

* three stage loading with webp and fixes some thumbnail fits

* fixed local thumbnail

* fixed paging in iOS

mobile/lib/routing/router.gr.dart

@@ -48,21 +48,6 @@ class _$AppRouter extends RootStackRouter {
           child: GalleryViewerPage(
               key: args.key, assetList: args.assetList, asset: args.asset));
     },
-    ImageViewerRoute.name: (routeData) {
-      final args = routeData.argsAs<ImageViewerRouteArgs>();
-      return MaterialPageX<dynamic>(
-          routeData: routeData,
-          child: ImageViewerPage(
-              key: args.key,
-              heroTag: args.heroTag,
-              asset: args.asset,
-              authToken: args.authToken,
-              isZoomedFunction: args.isZoomedFunction,
-              isZoomedListener: args.isZoomedListener,
-              loadPreview: args.loadPreview,
-              loadOriginal: args.loadOriginal,
-              showExifSheet: args.showExifSheet));
-    },
     VideoViewerRoute.name: (routeData) {
       final args = routeData.argsAs<VideoViewerRouteArgs>();
       return MaterialPageX<dynamic>(
@@ -204,8 +189,6 @@ class _$AppRouter extends RootStackRouter {
             ]),
         RouteConfig(GalleryViewerRoute.name,
             path: '/gallery-viewer-page', guards: [authGuard]),
-        RouteConfig(ImageViewerRoute.name,
-            path: '/image-viewer-page', guards: [authGuard]),
         RouteConfig(VideoViewerRoute.name,
             path: '/video-viewer-page', guards: [authGuard]),
         RouteConfig(BackupControllerRoute.name,
@@ -299,71 +282,6 @@ class GalleryViewerRouteArgs {
   }
 }
 
-/// generated route for
-/// [ImageViewerPage]
-class ImageViewerRoute extends PageRouteInfo<ImageViewerRouteArgs> {
-  ImageViewerRoute(
-      {Key? key,
-      required String heroTag,
-      required Asset asset,
-      required String authToken,
-      required void Function() isZoomedFunction,
-      required ValueNotifier<bool> isZoomedListener,
-      required bool loadPreview,
-      required bool loadOriginal,
-      void Function()? showExifSheet})
-      : super(ImageViewerRoute.name,
-            path: '/image-viewer-page',
-            args: ImageViewerRouteArgs(
-                key: key,
-                heroTag: heroTag,
-                asset: asset,
-                authToken: authToken,
-                isZoomedFunction: isZoomedFunction,
-                isZoomedListener: isZoomedListener,
-                loadPreview: loadPreview,
-                loadOriginal: loadOriginal,
-                showExifSheet: showExifSheet));
-
-  static const String name = 'ImageViewerRoute';
-}
-
-class ImageViewerRouteArgs {
-  const ImageViewerRouteArgs(
-      {this.key,
-      required this.heroTag,
-      required this.asset,
-      required this.authToken,
-      required this.isZoomedFunction,
-      required this.isZoomedListener,
-      required this.loadPreview,
-      required this.loadOriginal,
-      this.showExifSheet});
-
-  final Key? key;
-
-  final String heroTag;
-
-  final Asset asset;
-
-  final String authToken;
-
-  final void Function() isZoomedFunction;
-
-  final ValueNotifier<bool> isZoomedListener;
-
-  final bool loadPreview;
-
-  final bool loadOriginal;
-
-  final void Function()? showExifSheet;
-
-  @override
-  String toString() {
-    return 'ImageViewerRouteArgs{key: $key, heroTag: $heroTag, asset: $asset, authToken: $authToken, isZoomedFunction: $isZoomedFunction, isZoomedListener: $isZoomedListener, loadPreview: $loadPreview, loadOriginal: $loadOriginal, showExifSheet: $showExifSheet}';
-  }
-}
-
 /// generated route for
 /// [VideoViewerPage]
 class VideoViewerRoute extends PageRouteInfo<VideoViewerRouteArgs> {