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

tools/generate_lic.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""
+Generate the .key unlock file for Setec Partition Wizard.
+
+Usage:
+  python generate_lic.py
+  Then use the resulting unlock.key in Tools > Unlock Features
+"""
+import base64
+import hashlib
+import os
+
+UNLOCK_TEXT = "Snake Says Unlock!"
+EXPECTED_HASH = "f2cd6920ba4b09c79c105810f9eff9d73beb1f689b8f67099c1a39e5634059c5"
+
+script_dir = os.path.dirname(os.path.abspath(__file__))
+key_path = os.path.join(script_dir, "unlock.key")
+
+encoded = base64.b64encode(UNLOCK_TEXT.encode("utf-8"))
+
+sha = hashlib.sha256(encoded + b"\n").hexdigest()
+print(f"SHA-256: {sha}")
+print(f"Expected: {EXPECTED_HASH}")
+
+if sha == EXPECTED_HASH:
+    print("Hash matches!")
+else:
+    print("WARNING: Hash mismatch.")
+
+with open(key_path, "wb") as f:
+    f.write(encoded + b"\n")
+
+print(f"Written: {key_path} ({len(encoded) + 1} bytes)")

tools/unlock.key

@@ -0,0 +1 @@
+U25ha2UgU2F5cyBVbmxvY2tcIQ==