feat: add comprehensive Windows PowerShell script usage instructions

- Enhanced ScriptPreview with detailed Windows-specific installation steps including execution policy handling and winget availability checks
- Added localization support for all script preview UI elements and Windows usage instructions
- Improved script generator with automatic unblocking, admin privilege warnings, and winget validation

src/app/api/sync-winget/route.ts

@@ -0,0 +1,86 @@
+import { NextResponse } from 'next/server'
+import { WingetPackageFetcher } from '@/services/wingetPackageFetcher'
+
+export const dynamic = 'force-dynamic'
+export const maxDuration = 300 // 5 minutes timeout
+
+let syncInProgress = false
+let syncStatus = {
+  status: 'idle' as 'idle' | 'fetching' | 'storing' | 'complete' | 'error',
+  fetchProgress: 0,
+  fetchTotal: 0,
+  storeProgress: 0,
+  storeTotal: 0,
+  currentPackage: '',
+  error: null as string | null
+}
+
+export async function GET() {
+  return NextResponse.json(syncStatus)
+}
+
+export async function POST() {
+  if (syncInProgress) {
+    return NextResponse.json(
+      { error: 'Sync already in progress' },
+      { status: 409 }
+    )
+  }
+
+  syncInProgress = true
+  syncStatus = {
+    status: 'fetching',
+    fetchProgress: 0,
+    fetchTotal: 0,
+    storeProgress: 0,
+    storeTotal: 0,
+    currentPackage: '',
+    error: null
+  }
+
+  // Start sync in background
+  ;(async () => {
+    try {
+      const fetcher = new WingetPackageFetcher()
+      
+      // Fetch packages
+      console.log('🔄 Starting Winget package fetch...')
+      const packages = await fetcher.fetchAllPackages(
+        (current, total, packageName) => {
+          syncStatus.fetchProgress = current
+          syncStatus.fetchTotal = total
+          syncStatus.currentPackage = packageName
+        }
+      )
+      
+      console.log(`✅ Fetched ${packages.length} Winget packages`)
+      
+      // Store packages
+      syncStatus.status = 'storing'
+      syncStatus.storeTotal = packages.length
+      
+      await fetcher.storePackages(
+        packages,
+        (current, total) => {
+          syncStatus.storeProgress = current
+          syncStatus.storeTotal = total
+        }
+      )
+      
+      syncStatus.status = 'complete'
+      console.log('✅ Winget sync completed successfully')
+      
+    } catch (error) {
+      console.error('❌ Winget sync error:', error)
+      syncStatus.status = 'error'
+      syncStatus.error = error instanceof Error ? error.message : 'Unknown error'
+    } finally {
+      syncInProgress = false
+    }
+  })()
+
+  return NextResponse.json({ 
+    message: 'Winget package sync started',
+    status: syncStatus 
+  })
+}