Add git-based versioning and build version display

- versionCode from commit count + offset (always incremental)
- versionName from git tag (semantic versioning)
- BuildConfig.DISPLAY_VERSION shows "0.1.0+N.hash" in login screen
- Updated deploy.ps1 to use git versioning instead of manual bumps

deploy.ps1

@@ -10,20 +10,18 @@ $ErrorActionPreference = "Stop"
 
 $AppId = "25653777174321448"
 $Token = "OC|25653777174321448|b861e3eeaf58edf097812b5fe588dabb"
-$BuildGradle = "$PSScriptRoot\app\build.gradle.kts"
 $OvrUtil = "$PSScriptRoot\ovr-platform-util.exe"
 
-# --- Bump versionCode ---
-$content = Get-Content $BuildGradle -Raw
-if ($content -match 'versionCode\s*=\s*(\d+)') {
-    $oldCode = [int]$Matches[1]
-    $newCode = $oldCode + 1
-    $content = $content -replace "versionCode\s*=\s*$oldCode", "versionCode = $newCode"
-    Set-Content $BuildGradle $content -NoNewline
-    Write-Host "Bumped versionCode: $oldCode -> $newCode" -ForegroundColor Cyan
-} else {
-    Write-Error "Could not find versionCode in build.gradle.kts"
-}
+# --- Git version info ---
+$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"
+
+Write-Host "Version: $displayVersion (versionCode=$commitCount)" -ForegroundColor Cyan
 
 # --- Build APK ---
 $task = if ($BuildType -eq "release") { ":app:assembleRelease" } else { ":app:assembleDebug" }
@@ -44,8 +42,8 @@ Write-Host "Uploading to channel '$Channel'..." -ForegroundColor Cyan
     --apk $apk `
     --channel $Channel `
     --age-group MIXED_AGES `
-    --notes "v$newCode $BuildType build"
+    --notes "$displayVersion $BuildType build"
 
 if ($LASTEXITCODE -ne 0) { Write-Error "Upload failed" }
 
-Write-Host "Deployed versionCode $newCode ($BuildType) to '$Channel'" -ForegroundColor Green
+Write-Host "Deployed $displayVersion ($BuildType) to '$Channel'" -ForegroundColor Green