v1.2.0 — Linux Flasher, Kali Creator, fixed flashing & counterfeit detection

New features:
- Linux Flasher tab: download+decompress+flash pipeline for RPi OS, Ubuntu,
  Debian, Fedora, Kali, DietPi, Alpine, Arch ARM with built-in image catalog
- Kali Creator tab: 4 sub-tabs for USB/SD, VM creation, Docker/Podman
  container pulls, and cloud image downloads
- DownloadManager: async downloads with resume support and speed tracking
- Decompressor: streaming .xz (xz-embedded), .gz (zlib), .zip decompression
- ImageCatalog: built-in catalog + remote fetch from rpi-imager JSON endpoint
- SevenZipExtractor: QProcess wrapper for 7z.exe with progress parsing
- Bundled xz-embedded third-party library for native XZ decompression

Bug fixes:
- Fixed VirtualDisk::flashToDisk() — added FSCTL_ALLOW_EXTENDED_DASD_IO,
  FSCTL_LOCK_VOLUME, FSCTL_DISMOUNT_VOLUME, 32MB aligned buffers,
  WriteFile retry logic (3 attempts), FlushFileBuffers before close
- Fixed VirtualDisk::captureFromDisk() with same improvements
- Fixed ImagingTab::onFlashIso() — now populates targetVolumeLetters from
  disk snapshot so IsoFlasher can properly lock/dismount volumes
- Fixed SD card counterfeit detection false positives:
  - Changed from write-one-read-one to write-all-then-read-all algorithm
    to properly detect NAND address wrapping on fake cards
  - Added volume lock/dismount before probing to prevent filesystem
    interference (journal writes, metadata updates)
  - Added FSCTL_ALLOW_EXTENDED_DASD_IO for probes near end of disk
  - Fixed overly aggressive vendor string check — USB card readers
    legitimately report "USB"/"Mass Storage", no longer flagged
  - Added handle re-open between write and verify phases to defeat
    USB reader hardware cache
- README: documented how to unlock the secret menu, added new feature docs

src/ui/tabs/KaliCreatorTab.h

@@ -0,0 +1,109 @@
+#pragma once
+
+#include "core/common/Types.h"
+#include "core/disk/DiskEnumerator.h"
+
+#include <QWidget>
+
+class QCheckBox;
+class QComboBox;
+class QLabel;
+class QLineEdit;
+class QPlainTextEdit;
+class QProcess;
+class QProgressBar;
+class QPushButton;
+class QSpinBox;
+class QTabWidget;
+
+namespace spw
+{
+
+class DownloadManager;
+
+class KaliCreatorTab : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit KaliCreatorTab(QWidget* parent = nullptr);
+    ~KaliCreatorTab() override;
+
+public slots:
+    void refreshDisks(const SystemDiskSnapshot& snapshot);
+
+signals:
+    void statusMessage(const QString& msg);
+
+private slots:
+    // USB / SD Card
+    void onFlashToUsb();
+    void onUsbImageChanged(int index);
+
+    // Virtual Machine
+    void onCreateVmDisk();
+    void onBrowseVmOutput();
+    void onDownloadPrebuiltVm();
+
+    // Containers
+    void onPullContainerImage();
+    void onContainerRuntimeChanged(int index);
+    void onContainerTagChanged(int index);
+
+    // Cloud Image
+    void onDownloadCloudImage();
+    void onBrowseCloudOutput();
+
+private:
+    void setupUi();
+    void setupUsbTab(QTabWidget* tabs);
+    void setupVmTab(QTabWidget* tabs);
+    void setupContainerTab(QTabWidget* tabs);
+    void setupCloudTab(QTabWidget* tabs);
+    void populateRemovableDrives();
+    void updateContainerPullPreview();
+
+    static QString formatSize(uint64_t bytes);
+
+    // USB / SD Card sub-tab
+    QComboBox*    m_usbImageCombo      = nullptr;
+    QComboBox*    m_usbTargetCombo     = nullptr;
+    QCheckBox*    m_usbPersistCheck    = nullptr;
+    QSpinBox*     m_usbPersistSizeSpin = nullptr;
+    QLabel*       m_usbPersistLabel    = nullptr;
+    QProgressBar* m_usbProgress        = nullptr;
+    QLabel*       m_usbStatusLabel     = nullptr;
+    QPushButton*  m_usbFlashBtn        = nullptr;
+
+    // Virtual Machine sub-tab
+    QComboBox*    m_vmFormatCombo       = nullptr;
+    QSpinBox*     m_vmSizeSpin         = nullptr;
+    QLineEdit*    m_vmOutputEdit       = nullptr;
+    QComboBox*    m_vmVersionCombo     = nullptr;
+    QPushButton*  m_vmCreateBtn        = nullptr;
+    QPushButton*  m_vmDownloadBtn      = nullptr;
+    QProgressBar* m_vmProgress         = nullptr;
+    QLabel*       m_vmStatusLabel      = nullptr;
+
+    // Containers sub-tab
+    QComboBox*      m_containerRuntimeCombo = nullptr;
+    QComboBox*      m_containerTagCombo     = nullptr;
+    QLineEdit*      m_containerCmdPreview   = nullptr;
+    QPushButton*    m_containerPullBtn      = nullptr;
+    QPlainTextEdit* m_containerLog          = nullptr;
+    QProcess*       m_containerProcess      = nullptr;
+
+    // Cloud Image sub-tab
+    QComboBox*    m_cloudFormatCombo    = nullptr;
+    QLabel*       m_cloudInfoLabel     = nullptr;
+    QLineEdit*    m_cloudOutputEdit    = nullptr;
+    QPushButton*  m_cloudDownloadBtn   = nullptr;
+    QProgressBar* m_cloudProgress      = nullptr;
+    QLabel*       m_cloudStatusLabel   = nullptr;
+
+    // Shared
+    SystemDiskSnapshot m_snapshot;
+    DownloadManager* m_downloader = nullptr;
+};
+
+} // namespace spw