初始提交卡包 USB 工程

纳入固件源码、屏幕组件、nand_xfer 工具和文档。忽略本机构建产物、sdkconfig，以及含本机路径的依赖锁。

Co-authored-by: Cursor <[email protected]>

nand_xfer/build_gui.ps1

@@ -0,0 +1,18 @@
+$ErrorActionPreference = 'Stop'
+$project = $PSScriptRoot
+$venv = Join-Path $project '.venv_gui'
+$py = Join-Path $venv 'Scripts\python.exe'
+Push-Location $project
+try {
+    if (-not (Test-Path -LiteralPath $py)) {
+        & py -3 -m venv $venv
+        if ($LASTEXITCODE -ne 0) { throw "venv failed: $LASTEXITCODE" }
+    }
+    & $py -m pip install -q --upgrade pip pyinstaller pyserial
+    if ($LASTEXITCODE -ne 0) { throw "pip failed: $LASTEXITCODE" }
+    & $py -m PyInstaller --noconfirm --clean --workpath gui_build --distpath dist nand_put_gui.spec
+    if ($LASTEXITCODE -ne 0) { throw "PyInstaller failed: $LASTEXITCODE" }
+    $exe = Join-Path $project 'dist\NAND_Xfer.exe'
+    if (-not (Test-Path -LiteralPath $exe)) { throw "Missing $exe" }
+    Write-Host "GUI exe: $exe"
+} finally { Pop-Location }