Use .buildcount file for unique auto-incrementing versionCode

Build counter is incremented by deploy.ps1 on every deploy, ensuring
unique versionCode even from the same commit. File is gitignored.

deploy.ps1

@@ -11,17 +11,24 @@ $ErrorActionPreference = "Stop"
 $AppId = "25653777174321448"
 $Token = "OC|25653777174321448|b861e3eeaf58edf097812b5fe588dabb"
 $OvrUtil = "$PSScriptRoot\ovr-platform-util.exe"
+$BuildCountFile = "$PSScriptRoot\.buildcount"
+
+# --- Increment build count ---
+$buildCount = 1
+if (Test-Path $BuildCountFile) {
+    $buildCount = [int](Get-Content $BuildCountFile -Raw).Trim() + 1
+}
+Set-Content $BuildCountFile $buildCount -NoNewline
+Write-Host "Build #$buildCount" -ForegroundColor Cyan
 
 # --- Git version info ---
 $versionName = (git describe --tags --abbrev=0 2>$null) -replace '^v', ''
 if (-not $versionName) { $versionName = "0.1.0" }
-$commitCount = git rev-list --count HEAD 2>$null
-if (-not $commitCount) { $commitCount = "1" }
 $shortHash = git rev-parse --short HEAD 2>$null
 if (-not $shortHash) { $shortHash = "unknown" }
-$displayVersion = "$versionName+$commitCount.$shortHash"
+$displayVersion = "$versionName+$buildCount.$shortHash"
 
-Write-Host "Version: $displayVersion (versionCode=$commitCount)" -ForegroundColor Cyan
+Write-Host "Version: $displayVersion (versionCode=$buildCount)" -ForegroundColor Cyan
 
 # --- Build APK ---
 $task = if ($BuildType -eq "release") { ":app:assembleRelease" } else { ":app:assembleDebug" }