Add media preview and streaming functionality

- Introduced MediaPreviewDialog for previewing images and videos with zoom, pan, and video controls.
- Implemented MediaStreamer to handle HTTP streaming of media files from iOS devices, supporting range requests for video scrubbing.
- Created MediaStreamerManager as a singleton to manage MediaStreamer instances and ensure efficient resource usage.
- Developed PhotoModel to manage photo data, including thumbnail generation for both images and videos, with caching mechanisms.
- Added asynchronous loading of thumbnails using QtConcurrent for improved performance.
- Implemented disk caching for thumbnails to reduce loading times and improve user experience.(beta)

src/gallerywidget.cpp

@@ -1,3 +1,104 @@
 #include "gallerywidget.h"
+#include "iDescriptor.h"
+#include "mediapreviewdialog.h"
+#include "photomodel.h"
+#include <QDebug>
+#include <QLabel>
+#include <QListView>
+#include <QVBoxLayout>
+#include <QtConcurrent/QtConcurrent>
 
-GalleryWidget::GalleryWidget(QWidget *parent) : QWidget{parent} {}
+QByteArray read_afc_file_to_byte_array(afc_client_t afcClient, const char *path)
+{
+    uint64_t fd_handle = 0;
+    afc_error_t fd_err =
+        afc_file_open(afcClient, path, AFC_FOPEN_RDONLY, &fd_handle);
+
+    if (fd_err != AFC_E_SUCCESS) {
+        qDebug() << "Could not open file" << path;
+        return QByteArray();
+    }
+
+    // TODO: is this necessary
+    char **info = NULL;
+    afc_get_file_info(afcClient, path, &info);
+    uint64_t fileSize = 0;
+    if (info) {
+        for (int i = 0; info[i]; i += 2) {
+            if (strcmp(info[i], "st_size") == 0) {
+                fileSize = std::stoull(info[i + 1]);
+                break;
+            }
+        }
+        afc_dictionary_free(info);
+    }
+
+    if (fileSize == 0) {
+        afc_file_close(afcClient, fd_handle);
+        return QByteArray();
+    }
+
+    QByteArray buffer;
+
+    buffer.resize(fileSize);
+    uint32_t bytesRead = 0;
+    afc_file_read(afcClient, fd_handle, buffer.data(), buffer.size(),
+                  &bytesRead);
+
+    if (bytesRead != fileSize) {
+        qDebug() << "AFC Error: Read mismatch for file" << path;
+        return QByteArray(); // Read failed
+    }
+
+    return buffer;
+};
+
+void GalleryWidget::load()
+{
+    if (m_loaded)
+        return;
+    m_loaded = true;
+
+    char **files = nullptr;
+    // TODO:ignore directories
+    safe_afc_read_directory(m_device->afcClient, m_device->device,
+                            "/DCIM/100APPLE", &files);
+
+    auto *mainLayout = new QVBoxLayout(this);
+    m_listView = new QListView(this);
+    mainLayout->addWidget(m_listView);
+    setLayout(mainLayout);
+
+    m_listView->setViewMode(QListView::IconMode);
+    m_listView->setFlow(QListView::LeftToRight);
+    m_listView->setWrapping(true);
+    m_listView->setResizeMode(QListView::Adjust);
+    m_listView->setIconSize(QSize(120, 120));
+    m_listView->setSpacing(10);
+
+    PhotoModel *model = new PhotoModel(m_device, this);
+    m_listView->setModel(model);
+
+    // Connect double-click to open preview dialog
+    connect(m_listView, &QListView::doubleClicked, this,
+            [this, model](const QModelIndex &index) {
+                if (!index.isValid())
+                    return;
+
+                QString filePath = model->data(index, Qt::UserRole).toString();
+                if (filePath.isEmpty())
+                    return;
+
+                qDebug() << "Opening preview for" << filePath;
+                auto *previewDialog =
+                    new MediaPreviewDialog(m_device, filePath, this);
+                previewDialog->setAttribute(Qt::WA_DeleteOnClose);
+                previewDialog->show();
+            });
+}
+
+GalleryWidget::GalleryWidget(iDescriptorDevice *device, QWidget *parent)
+    : QWidget{parent}, m_device(device)
+{
+    // Widget setup is done in load() method when gallery tab is activated
+}