Add install script for clone-first one-click deployment.

Prompt for repo URL and install directory, auto git clone, then run project setup. Keep deploy.py for in-repo updates only.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/install.ps1

@@ -0,0 +1,52 @@
+# LocalNav 一键安装（无需预先克隆）
+# 用法：在 PowerShell 中执行 .\scripts\install.ps1
+
+$ErrorActionPreference = "Stop"
+$DefaultRepo = "https://git.bz121.com/dekun/LocalNav.git"
+$DefaultDir = Join-Path (Get-Location) "LocalNav"
+
+function Need-Cmd($name) {
+    if (-not (Get-Command $name -ErrorAction SilentlyContinue)) {
+        Write-Error "[FAIL] 未找到 $name，请先安装"
+    }
+}
+
+Need-Cmd python
+Need-Cmd git
+
+$repo = $env:NAV_INSTALL_REPO
+if (-not $repo) {
+    $inputRepo = Read-Host "Git 仓库地址 [$DefaultRepo]"
+    $repo = if ($inputRepo) { $inputRepo } else { $DefaultRepo }
+}
+
+$dest = $env:NAV_INSTALL_DIR
+if (-not $dest) {
+    $inputDir = Read-Host "安装目录 [$DefaultDir]"
+    $dest = if ($inputDir) { $inputDir } else { $DefaultDir }
+}
+
+$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$installPy = Join-Path $scriptDir "install.py"
+
+if (Test-Path $installPy) {
+    python $installPy --repo $repo --dir $dest
+    exit $LASTEXITCODE
+}
+
+$destPath = Resolve-Path -LiteralPath $dest -ErrorAction SilentlyContinue
+if ($destPath -and (Test-Path (Join-Path $destPath "app.py"))) {
+    Write-Host "[OK] 目录已是 LocalNav，执行 git pull"
+    git -C $destPath pull --ff-only
+} elseif (Test-Path $dest) {
+    Write-Error "[FAIL] 目录已存在且不是 LocalNav 仓库: $dest"
+} else {
+    Write-Host "[OK] 正在克隆 $repo -> $dest"
+    $parent = Split-Path -Parent $dest
+    if ($parent -and -not (Test-Path $parent)) {
+        New-Item -ItemType Directory -Path $parent -Force | Out-Null
+    }
+    git clone $repo $dest
+}
+
+python (Join-Path $dest "scripts\deploy.py")