feat(remote): serial/USB/USBIP remote forwarding with virtual serial port

src/main/remote/shell.ts

@@ -0,0 +1,54 @@
+// 跨平台默认 shell 选择
+import { platform } from 'node:process'
+import { execSync } from 'node:child_process'
+
+export interface ShellSpec {
+  file: string
+  args: string[]
+  label: string
+}
+
+function which(bin: string): string | null {
+  try {
+    const cmd = platform === 'win32' ? `where ${bin}` : `command -v ${bin}`
+    const out = execSync(cmd, { stdio: ['ignore', 'pipe', 'ignore'] }).toString().trim().split(/\r?\n/)[0]
+    return out || null
+  } catch {
+    return null
+  }
+}
+
+export function defaultShell(): ShellSpec {
+  switch (platform) {
+    case 'win32': {
+      // 优先 PowerShell 7 (pwsh), 否则 Windows PowerShell 5 (powershell)
+      const pwsh = which('pwsh.exe') || which('pwsh')
+      if (pwsh) return { file: pwsh, args: ['-NoLogo'], label: 'PowerShell 7' }
+      const ps5 = which('powershell.exe') || which('powershell')
+      if (ps5) return { file: ps5, args: ['-NoLogo'], label: 'Windows PowerShell' }
+      return { file: 'powershell.exe', args: ['-NoLogo'], label: 'PowerShell' }
+    }
+    case 'darwin':
+    case 'linux': {
+      const envShell = process.env.SHELL
+      if (envShell) {
+        const name = envShell.split('/').pop() || envShell
+        return { file: envShell, args: [], label: name }
+      }
+      if (platform === 'darwin') {
+        const zsh = which('zsh')
+        if (zsh) return { file: zsh, args: [], label: 'zsh' }
+        const bash = which('bash')
+        if (bash) return { file: bash, args: ['-l'], label: 'bash' }
+      } else {
+        const bash = which('bash')
+        if (bash) return { file: bash, args: ['-l'], label: 'bash' }
+        const sh = which('sh')
+        if (sh) return { file: sh, args: [], label: 'sh' }
+      }
+      return { file: '/bin/sh', args: [], label: 'sh' }
+    }
+    default:
+      return { file: '/bin/sh', args: [], label: 'sh' }
+  }
+}