feat(camera): add in-app camera with direct upload to Nextcloud

Introduces a custom AVFoundation camera that captures photos and videos
and uploads them directly to Nextcloud without saving to the device
camera roll by default.

- Custom camera UI: shutter, flash, flip, mode selector (photo/video)
- Pinch-to-zoom from 0.5x (ultra-wide) to 10x with live zoom label
- Virtual multi-camera support (triple/dual-wide) for sub-1x zoom
- Recording timer with red dot, screen stays on during video recording
- App backgrounding gracefully stops recording in progress
- Review screen after capture: retake or use, inline video playback
- "Save to camera roll" opt-in toggle per session (off by default)
- Global default for toggle in Settings -> Advanced
- Filenames follow Nextcloud conventions via createFileName(),
  including "Maintain original filename" mode (IMG_XXXX.JPG)
- Videos saved as .mov (QuickTime) matching Apple native camera format
- Restored live photo upload logic: livePhotoFile and nativeFormat
  were inadvertently removed in a previous refactor
- Fix: PHAuthorizationStatus.limited now correctly treated as authorized
- Fix: NCViewerQuickLookView crash when asset is nil after model change

Signed-off-by: Rasmus Wøldike <rswoldike@gmail.com>

Author: Rasmussw

iOSClient/Main/Create/Upload Assets/NCUploadAssetsModel.swift

@@ -1,10 +1,7 @@
-//
-//  NCUploadAssetsView.swift
-//  Nextcloud
-//
-//  Created by Marino Faggiana on 03/06/24.
-//  Copyright © 2024 Marino Faggiana. All rights reserved.
-//
+// SPDX-FileCopyrightText: Nextcloud GmbH
+// SPDX-FileCopyrightText: 2024 Marino Faggiana
+// SPDX-FileCopyrightText: 2026 Rasmus Wøldike
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 import SwiftUI
 import NextcloudKit
@@ -45,7 +42,7 @@ struct NCUploadAssetsView: View {
                                         }) {
                                             Label(NSLocalizedString("_rename_", comment: ""), systemImage: "pencil")
                                         }
-                                        if item.asset.type == .photo || item.asset.type == .livePhoto {
+                                        if item.asset?.type == .photo || item.asset?.type == .livePhoto {
                                             Button(action: {
                                                 if model.presentedQuickLook(index: index, fileNamePath: fileNamePath) {
                                                     self.index = index
@@ -57,22 +54,22 @@ struct NCUploadAssetsView: View {
                                         }
                                         if item.data != nil {
                                             Button(action: {
-                                                if let image = model.previewStore[index].asset.fullResolutionImage?.resizeImage(size: CGSize(width: 240, height: 240), isAspectRation: true) {
+                                                if let image = model.previewStore[index].asset?.fullResolutionImage?.resizeImage(size: CGSize(width: 240, height: 240), isAspectRation: true) {
                                                     model.previewStore[index].image = image
                                                     model.previewStore[index].data = nil
-                                                    model.previewStore[index].assetType = model.previewStore[index].asset.type
+                                                    model.previewStore[index].assetType = model.previewStore[index].asset?.type ?? .photo
                                                 }
                                             }) {
                                                 Label(NSLocalizedString("_undo_modify_", comment: ""), systemImage: "arrow.uturn.backward.circle")
                                             }
                                         }
-                                        if item.data == nil && item.asset.type == .livePhoto && item.assetType == .livePhoto {
+                                        if item.data == nil && item.asset?.type == .livePhoto && item.assetType == .livePhoto {
                                             Button(action: {
                                                 model.previewStore[index].assetType = .photo
                                             }) {
                                                 Label(NSLocalizedString("_disable_livephoto_", comment: ""), systemImage: "livephoto.slash")
                                             }
-                                        } else if item.data == nil && item.asset.type == .livePhoto && item.assetType == .photo {
+                                        } else if item.data == nil && item.asset?.type == .livePhoto && item.assetType == .photo {
                                             Button(action: {
                                                 model.previewStore[index].assetType = .livePhoto
                                             }) {
@@ -134,9 +131,15 @@ struct NCUploadAssetsView: View {
                         }
                     }
 
+                    if !model.tempAssets.isEmpty {
+                        Section {
+                            Toggle(NSLocalizedString("_save_to_camera_roll_", comment: ""), isOn: $model.saveToCameraRoll)
+                                .font(.body)
+                                .tint(Color(NCBrandColor.shared.getElement(account: model.session.account)))
+                        }
+                    }
+
                     Section {
-                        // Auto upload requires creating folders and subfolders which are difficult to manage offline
-                        // 
                         if NCNetworking.shared.isOnline {
                             Toggle(isOn: $model.useAutoUploadFolder, label: {
                                 Text(NSLocalizedString("_use_folder_auto_upload_", comment: ""))
@@ -259,12 +262,12 @@ struct NCUploadAssetsView: View {
                             .frame(width: 80, height: 80, alignment: .center)
                             .cornerRadius(10)
                     } else {
-                        Color(.lightGray) // Placeholder
+                        Color(.lightGray)
                             .frame(width: 80, height: 80)
                             .cornerRadius(10)
                             .onAppear {
                                 DispatchQueue.main.async {
-                                    if let asset = item.asset.phAsset,
+                                    if let asset = item.asset?.phAsset,
                                        let image = model.lowResolutionImage(asset: asset) {
                                         model.previewStore[index].image = image
                                     }
@@ -294,7 +297,3 @@ struct NCUploadAssetsView: View {
         }
     }
 }
-
-#Preview {
-    NCUploadAssetsView(model: NCUploadAssetsModel(assets: [], serverUrl: "/", controller: nil))
-}