feat(deploy): smart update script with skip-if-no-changes and silent mode

Only pulls and restarts the service when new commits exist.
Supports -Silent flag for Task Scheduler (logs to update.log).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

update.ps1

@@ -1,35 +1,72 @@
 # GoMag Vending - Update Script
-# Ruleaza ca Administrator: .\update.ps1
+# Ruleaza interactiv:  .\update.ps1
+# Ruleaza din scheduler: .\update.ps1 -Silent
+
+param(
+    [switch]$Silent
+)
 
 $RepoPath = "C:\gomag-vending"
 $TokenFile = Join-Path $RepoPath ".gittoken"
+$LogFile = Join-Path $RepoPath "update.log"
+
+function Log($msg, $color = "White") {
+    $ts = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    if ($Silent) {
+        Add-Content -Path $LogFile -Value "$ts  $msg"
+    } else {
+        Write-Host $msg -ForegroundColor $color
+    }
+}
 
 # Citire token
 if (-not (Test-Path $TokenFile)) {
-    Write-Host "EROARE: $TokenFile nu exista!" -ForegroundColor Red
+    Log "EROARE: $TokenFile nu exista!" "Red"
     exit 1
 }
 $token = (Get-Content $TokenFile -Raw).Trim()
 
-# Git pull
+# Fetch remote
-Write-Host "==> Git pull..." -ForegroundColor Cyan
 Set-Location $RepoPath
-git -c credential.helper="" pull "https://gomag-vending:$token@gitea.romfast.ro/romfast/gomag-vending.git"
+git -c credential.helper="" fetch "https://gomag-vending:$token@gitea.romfast.ro/romfast/gomag-vending.git" main 2>&1 | Out-Null
 if ($LASTEXITCODE -ne 0) {
-    Write-Host "EROARE: git pull esuat!" -ForegroundColor Red
+    Log "EROARE: git fetch esuat!" "Red"
+    exit 1
+}
+
+# Compara local vs remote
+$local = git rev-parse HEAD
+$remote = git rev-parse FETCH_HEAD
+
+if ($local -eq $remote) {
+    Log "Nicio actualizare disponibila." "Gray"
+    exit 0
+}
+
+# Exista update-uri
+$commits = git log --oneline "$local..$remote"
+Log "==> Update disponibil ($($commits.Count) commit-uri noi)" "Cyan"
+if (-not $Silent) {
+    $commits | ForEach-Object { Write-Host "    $_" -ForegroundColor DarkGray }
+}
+
+# Git pull
+Log "==> Git pull..." "Cyan"
+git -c credential.helper="" pull "https://gomag-vending:$token@gitea.romfast.ro/romfast/gomag-vending.git" 2>&1 | Out-Null
+if ($LASTEXITCODE -ne 0) {
+    Log "EROARE: git pull esuat!" "Red"
     exit 1
 }
 
 # Pip install (daca s-au schimbat dependintele)
-Write-Host "==> Verificare dependinte..." -ForegroundColor Cyan
+Log "==> Verificare dependinte..." "Cyan"
-& "$RepoPath\venv\Scripts\pip.exe" install -r "$RepoPath\api\requirements.txt" --quiet
+& "$RepoPath\venv\Scripts\pip.exe" install -r "$RepoPath\api\requirements.txt" --quiet 2>&1 | Out-Null
 
 # Restart serviciu
-Write-Host "==> Restart GoMagVending..." -ForegroundColor Cyan
+Log "==> Restart GoMagVending..." "Cyan"
-nssm restart GoMagVending
+nssm restart GoMagVending 2>&1 | Out-Null
 
 Start-Sleep -Seconds 3
 $status = nssm status GoMagVending 2>&1
-Write-Host "Serviciu: $status" -ForegroundColor Green
+Log "Serviciu: $status" "Green"
-Write-Host ""
+Log "Update complet!" "Green"
-Write-Host "Update complet! Acces: http://localhost/gomag/" -ForegroundColor Green