fix(lsp): improve Windows server detection

src/tools/lsp/config.ts

@@ -170,31 +170,46 @@ export function isServerInstalled(command: string[]): boolean {
   }
 
   const isWindows = process.platform === "win32"
-  const ext = isWindows ? ".exe" : ""
+  
+  let exts = [""]
+  if (isWindows) {
+    const pathExt = process.env.PATHEXT || ""
+    if (pathExt) {
+       const systemExts = pathExt.split(";").filter(Boolean)
+       exts = [...new Set([...exts, ...systemExts, ".exe", ".cmd", ".bat", ".ps1"])]
+    } else {
+       exts = ["", ".exe", ".cmd", ".bat", ".ps1"]
+    }
+  }
 
-  const pathEnv = process.env.PATH || ""
+  let pathEnv = process.env.PATH || ""
+  if (isWindows && !pathEnv) {
+    pathEnv = process.env.Path || ""
+  }
+  
   const pathSeparator = isWindows ? ";" : ":"
   const paths = pathEnv.split(pathSeparator)
 
   for (const p of paths) {
-    if (existsSync(join(p, cmd)) || existsSync(join(p, cmd + ext))) {
-      return true
+    for (const suffix of exts) {
+      if (existsSync(join(p, cmd + suffix))) {
+        return true
+      }
     }
   }
 
   const cwd = process.cwd()
-  const additionalPaths = [
-    join(cwd, "node_modules", ".bin", cmd),
-    join(cwd, "node_modules", ".bin", cmd + ext),
-    join(homedir(), ".config", "opencode", "bin", cmd),
-    join(homedir(), ".config", "opencode", "bin", cmd + ext),
-    join(homedir(), ".config", "opencode", "node_modules", ".bin", cmd),
-    join(homedir(), ".config", "opencode", "node_modules", ".bin", cmd + ext),
+  const additionalBases = [
+    join(cwd, "node_modules", ".bin"),
+    join(homedir(), ".config", "opencode", "bin"),
+    join(homedir(), ".config", "opencode", "node_modules", ".bin"),
   ]
 
-  for (const p of additionalPaths) {
-    if (existsSync(p)) {
-      return true
+  for (const base of additionalBases) {
+    for (const suffix of exts) {
+      if (existsSync(join(base, cmd + suffix))) {
+        return true
+      }
     }
   }