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

README.md

@@ -59,6 +59,19 @@ RVZ/WIA (Dolphin Wii), WUA (Cemu Wii U), WBFS (Wii Backup), NRG (Nero), MDF (Alc
 - **Disk cloning** — sector-by-sector or smart clone (skips unallocated space)
 - **Checksum verification** — SHA-256, MD5, and CRC32 on all imaging operations
 
+### Linux Flasher
+- **Built-in image catalog** — Raspberry Pi OS, Ubuntu, Debian, Fedora, Kali, DietPi, Alpine, Arch Linux ARM
+- **One-click download & flash** — download, decompress, and flash in a single pipeline
+- **Decompression support** — .xz (streaming via xz-embedded), .gz (zlib), .zip, .7z (via 7-Zip)
+- **Resume support** — resume interrupted downloads automatically
+- **Custom images** — flash any local .img/.iso file or paste a download URL
+
+### Kali Creator
+- **USB/SD Card** — download and flash any Kali variant (Installer, Live, ARM) with optional persistence partition
+- **Virtual Machine** — create QCOW2/VMDK/VDI/VHDX disks or download pre-built VMware/VirtualBox/Hyper-V VMs
+- **Containers** — pull `kalilinux/kali-rolling` via Docker or Podman with live log output
+- **Cloud Image** — download official Kali cloud images (Raw, QCOW2, OVA)
+
 ### S.M.A.R.T. & Diagnostics
 - **S.M.A.R.T. monitoring** for both ATA and NVMe drives — read all attributes, thresholds, and health status
 - **Disk benchmarks** — sequential and random read/write, queue depth 1 and 32
@@ -153,12 +166,22 @@ src/
 
 ---
 
-## A Note for the Curious
+## Unlocking the Secret Menu
+
+There's a hidden pentesting/diagnostics tab behind a puzzle. Two ways to unlock it:
+
+### The Easy Way
+1. Go to **Tools → Unlock Features...**
+2. Select the file `tools/unlock.key` (included in the repo)
+
+### The Hard Way
+1. Press **F5** while the app is running
+2. Survive the AstroChicken calibration
+3. Complete the Vohaul telemetry sequence
+4. Pass the Arnoid sensor authentication gate
 
 > *"Don't forget to look UP UP at space."*
 
-Press **F5** while the application is running. Something unexpected happens.
-
 A riddle. A dark void. And a very particular file that ships with every build — one that looks like garbage in a hex editor, but says something in a text editor. Find it. Read it. Then find the file that only *your* build can produce.
 
 Those who grew up cleaning floors on the SCS Deepship 86 might feel right at home. The janitor always did have a knack for finding hidden things.