修正windows打包路径问题

(cherry picked from commit 3db9d86bcd6f85cf6b81ee27e79a0d2a0f9287ab)

.github/workflows/build-multiplatform.yml

@@ -489,6 +489,32 @@ jobs:
           }
         shell: pwsh
 
+      - name: 🔧 验证 libcore 文件存在
+        run: |
+          Write-Host "📋 验证 libcore 文件是否存在..."
+          
+          if (Test-Path "libcore\bin\libcore.dll") {
+            $dllInfo = Get-Item "libcore\bin\libcore.dll"
+            Write-Host "✅ libcore.dll 存在: $($dllInfo.FullName) - 大小: $($dllInfo.Length) bytes"
+          } else {
+            Write-Host "❌ libcore.dll 不存在"
+            Write-Host "当前 libcore\bin 目录内容："
+            if (Test-Path "libcore\bin") {
+              Get-ChildItem "libcore\bin" | Format-Table Name, FullName, Length
+            } else {
+              Write-Host "libcore\bin 目录不存在"
+            }
+            exit 1
+          }
+          
+          if (Test-Path "libcore\bin\BearVPNCli.exe") {
+            $exeInfo = Get-Item "libcore\bin\BearVPNCli.exe"
+            Write-Host "✅ BearVPNCli.exe 存在: $($exeInfo.FullName) - 大小: $($exeInfo.Length) bytes"
+          } else {
+            Write-Host "⚠️ BearVPNCli.exe 不存在"
+          }
+        shell: pwsh
+
       - name: 🔨 构建 Windows (Release)
         run: |
           flutter build windows --release