From 8b5e372953d0be152108ac5fabf2f983c6007fde Mon Sep 17 00:00:00 2001
From: Danila Poyarkov <dev@dannote.net>
Date: Thu, 23 Apr 2026 16:01:11 +0300
Subject: [PATCH] fix(tauri): use navigator.platform for Windows detection in
 MCP spawn
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navigator.userAgent may not contain 'Windows' in all WebView2
contexts. navigator.platform.includes('Win') is more reliable.

Verified working on Windows x64 VM — MCP server spawns via
cmd /c and connects successfully.
---
 src/automation/spawn-mcp.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/automation/spawn-mcp.ts b/src/automation/spawn-mcp.ts
index 3e8ed21bf..a5ebbb581 100644
--- a/src/automation/spawn-mcp.ts
+++ b/src/automation/spawn-mcp.ts
@@ -67,7 +67,7 @@ export async function spawnMCPIfNeeded(): Promise<AutomationServerHandle | null>
   runtimeAutomationAuthToken = authToken
 
   const { Command } = await import('@tauri-apps/plugin-shell')
-  const isWindows = navigator.userAgent.includes('Windows')
+  const isWindows = navigator.platform.includes('Win')
   const command = isWindows
     ? Command.create('cmd', ['/c', 'openpencil-mcp-http'], {
         env: {