fix(profile): 修复代理检测失败回退和工具名提取问题

修复代理自动检测中异常捕获逻辑，确保失败时能回退到直接探测
统一工具名提取逻辑，在 Windows 上移除 .exe 扩展名以保持一致性

Author: mudssky

profile/features/environment.ps1

@@ -149,13 +149,20 @@ function Initialize-Environment {
 
     # 自动检测代理（缓存 5 分钟避免每次 profile 加载都做 TCP 探测）
     if (-not $SkipProxy) {
-        $proxyState = Invoke-WithCache -Key "proxy-auto-detect" -MaxAge ([TimeSpan]::FromMinutes(5)) -CacheType Text -ScriptBlock {
-            Set-Proxy -Command auto
-            $result = if ($env:http_proxy) { 'on' } else { 'off' }
-            return $result
+        try {
+            $proxyState = Invoke-WithCache -Key "proxy-auto-detect" -MaxAge ([TimeSpan]::FromMinutes(5)) -CacheType Text -ScriptBlock {
+                Set-Proxy -Command auto
+                $result = if ($env:http_proxy) { 'on' } else { 'off' }
+                return $result
+            }
+            if ($proxyState -eq 'on' -and -not $env:http_proxy) {
+                Set-Proxy -Command on
+            }
         }
-        if ($proxyState -eq 'on' -and -not $env:http_proxy) {
-            Set-Proxy -Command on
+        catch {
+            Write-Verbose "代理自动检测失败: $($_.Exception.Message)"
+            # 回退到不缓存的直接探测
+            Set-Proxy -Command auto
         }
     }
 
@@ -184,7 +191,9 @@ function Initialize-Environment {
     $foundCommands = Get-Command -Name $toolNames -CommandType Application -ErrorAction SilentlyContinue
     if ($foundCommands) {
         foreach ($cmd in $foundCommands) {
-            $availableTools.Add($cmd.Name) | Out-Null
+            # Windows 上 .Name 带扩展名 (如 starship.exe)，统一去掉扩展名
+            $toolName = [System.IO.Path]::GetFileNameWithoutExtension($cmd.Name)
+            $availableTools.Add($toolName) | Out-Null
         }
     }