feat(MCPService): add method to find PowerShell executable path (#5393)

- Implemented `findPowerShellExecutable` to determine the correct PowerShell executable path on Windows.
- Updated `getSystemPath` to utilize the new method for improved path retrieval.

src/main/services/MCPService.ts

@@ -567,13 +567,26 @@ class McpService {
     return await cachedGetResource(server, uri)
   }
 
+  private findPowerShellExecutable() {
+    const psPath = 'C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe' // Standard WinPS path
+    const pwshPath = 'C:\\Program Files\\PowerShell\\7\\pwsh.exe'
+
+    if (fs.existsSync(psPath)) {
+      return psPath
+    }
+    if (fs.existsSync(pwshPath)) {
+      return pwshPath
+    }
+    return 'powershell.exe'
+  }
+
   private getSystemPath = memoize(async (): Promise<string> => {
     return new Promise((resolve, reject) => {
       let command: string
       let shell: string
 
       if (process.platform === 'win32') {
-        shell = 'powershell.exe'
+        shell = this.findPowerShellExecutable()
         command = '$env:PATH'
       } else {
         // 尝试获取当前用户的默认 shell
@@ -625,6 +638,10 @@ class McpService {
         console.error('Error getting PATH:', data.toString())
       })
 
+      child.on('error', (error: Error) => {
+        reject(new Error(`Failed to get system PATH, ${error.message}`))
+      })
+
       child.on('close', (code: number) => {
         if (code === 0) {
           const trimmedPath = path.trim()