Optimize Windows deployment scripts: build cache, console integration, and .env.example handling

Build-ROA2WEB.ps1 improvements:
- Add intelligent npm node_modules caching (saves 2-5 minutes on repeated builds)
- Cache stored outside deploy-package in .build-cache/ directory
- Add Clean Cache menu option ([C]) and -CleanCache parameter
- Include ROA2WEB-Console.ps1 in deployment package
- Update README workflow to use unified console (interactive and CLI modes)
- Remove obsolete script references (Manage-ROA2WEB.ps1, Deploy-*.ps1)
- Fix .env.example copying for backend and telegram-bot (copy from source instead of hardcoded template)

ROA2WEB-Console.ps1 improvements:
- Fix PowerShell parsing error: ${ComponentName}: instead of $ComponentName:
- Add .env.example copying in Update-BackendFiles function
- Add .env.example copying in Update-TelegramBotFiles function
- Keep .env.example synchronized with development templates

.gitignore:
- Add .build-cache/ to prevent committing npm cache directory

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

deployment/windows/scripts/ROA2WEB-Console.ps1

@@ -459,7 +459,7 @@ function Show-ServiceStatus {
 
     $service = Get-ServiceSafe -ServiceName $ServiceName
 
-    Write-Host "`n$ComponentName:" -ForegroundColor Cyan
+    Write-Host "`n${ComponentName}:" -ForegroundColor Cyan
     Write-Host "  Service Name:  $ServiceName" -ForegroundColor Gray
 
     if ($service) {
@@ -633,6 +633,14 @@ function Update-BackendFiles {
 
         Write-Success "Backend files updated"
 
+        # Copy .env.example explicitly (excluded from recursive copy)
+        $sourceEnvExample = Join-Path $sourceBackend ".env.example"
+        $destEnvExample = Join-Path $Config.BackendPath ".env.example"
+        if (Test-Path $sourceEnvExample) {
+            Copy-Item -Path $sourceEnvExample -Destination $destEnvExample -Force
+            Write-Success ".env.example template updated"
+        }
+
         # Check if requirements.txt changed
         $sourceReq = Join-Path $sourceBackend "requirements.txt"
         $destReq = Join-Path $Config.BackendPath "requirements.txt"
@@ -743,12 +751,19 @@ function Update-TelegramBotFiles {
             }
         }
 
-        # Preserve .env file
+        # Copy .env.example template (always update to keep in sync)
+        $sourceEnvExample = Join-Path $Config.SourcePath ".env.example"
+        $destEnvExample = Join-Path $Config.TelegramBotPath ".env.example"
+        if (Test-Path $sourceEnvExample) {
+            Copy-Item -Path $sourceEnvExample -Destination $destEnvExample -Force
+            Write-Success ".env.example template updated"
+        }
+
+        # Preserve .env file (or create from .env.example if missing)
         $envFile = Join-Path $Config.TelegramBotPath ".env"
         if (-not (Test-Path $envFile)) {
-            $sourceEnv = Join-Path $Config.SourcePath ".env.example"
-            if (Test-Path $sourceEnv) {
-                Copy-Item -Path $sourceEnv -Destination $envFile -Force
+            if (Test-Path $sourceEnvExample) {
+                Copy-Item -Path $sourceEnvExample -Destination $envFile -Force
                 Write-Warning "Created .env from .env.example - PLEASE CONFIGURE"
             }
         } else {