feat: 适配Devin IDE，添加API连接测试功能

app.go

@@ -107,6 +107,12 @@ func (a *App) initBackend() error {
 	// ── 创建跨服务的用量跟踪器 ──
 	a.usageTracker = services.NewUsageTracker(s.DataDir())
 
+	// ── Windsurf → Devin 账号数据迁移 ──
+	// 自动检测 Devin 安装并将 windsurf_auth.json 平滑迁移为 devin_auth.json
+	if migrated, err := services.MigrateWindsurfAuthToDevin(); err == nil && migrated {
+		log.Printf("[WindsurfTools] Windsurf → Devin auth 数据迁移完成")
+	}
+
 	// ── MITM Proxy & OpenAI Relay（回调钩子统一在 wireProxyCallbacks 注册）──
 	a.mitmProxy = services.NewMitmProxy(a.windsurfSvc, func(msg string) {
 		utils.DLog("%s", msg)

app_provider.go

@@ -196,6 +196,58 @@ func (a *App) DeleteProviderAccount(id string) error {
 	return a.providerStore.DeleteProvider(id)
 }
 
+// TestProviderAPIResult API 测试结果。
+type TestProviderAPIResult struct {
+	OK          bool     `json:"ok"`
+	Error       string   `json:"error,omitempty"`
+	ModelCount  int      `json:"model_count"`
+	ModelSample []string `json:"model_sample,omitempty"`
+	LatencyMs   int64    `json:"latency_ms"`
+}
+
+// TestProviderAPI 测试提供商 API 配置是否正确。
+// 不需要 ID，直接用传入的 provider/baseURL/token 进行测试。
+func (a *App) TestProviderAPI(provider, baseURL, token string) TestProviderAPIResult {
+	provider = strings.TrimSpace(strings.ToLower(provider))
+	baseURL = strings.TrimRight(strings.TrimSpace(baseURL), "/")
+	token = strings.TrimSpace(token)
+
+	if provider == "" || baseURL == "" || token == "" {
+		return TestProviderAPIResult{Error: "provider / base_url / token 不能为空"}
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	var httpClient *http.Client
+	if a.transportPool != nil {
+		httpClient = a.transportPool.Client()
+	}
+
+	start := time.Now()
+	list, err := services.FetchProviderModels(ctx, httpClient, provider, baseURL, token)
+	latency := time.Since(start).Milliseconds()
+
+	if err != nil {
+		return TestProviderAPIResult{
+			Error:     err.Error(),
+			LatencyMs: latency,
+		}
+	}
+
+	sample := list
+	if len(sample) > 5 {
+		sample = sample[:5]
+	}
+
+	return TestProviderAPIResult{
+		OK:          true,
+		ModelCount:  len(list),
+		ModelSample: sample,
+		LatencyMs:   latency,
+	}
+}
+
 // providerAccountDisplayName 给 ImportResult.Email 拼一个人类可读的占位名,
 // 风格同 ImportByAPIKey(token 前 12 + 后 6)。
 func providerAccountDisplayName(provider, token string) string {

app_runtime.go

@@ -1,8 +1,18 @@
 package main
 
+import (
+	"windsurf-tools-wails/backend/services"
+)
+
 func (a *App) supportsTray() bool {
 	if a != nil && a.traySupportedFn != nil {
 		return a.traySupportedFn()
 	}
 	return traySupported()
 }
+
+// GetIDEInfo 返回当前检测到的 IDE 信息（Devin 或 Windsurf）。
+// 前端可据此调整 UI 标签和行为。
+func (a *App) GetIDEInfo() map[string]string {
+	return services.GetIDEInfo()
+}

backend/app/diagnose/diagnose.go

@@ -231,18 +231,51 @@ func checkAppDataDirWritable(dir string) Check {
 }
 
 func checkWindsurfInstalled() Check {
-	c := Check{ID: "windsurf", Title: "Windsurf IDE 安装"}
+	c := Check{ID: "windsurf", Title: "Devin / Windsurf IDE 安装"}
+
+	// 先检查 Devin（新产品，优先）
+	for _, p := range devinCandidatesByOS() {
+		if _, err := os.Stat(p); err == nil {
+			c.Status, c.Detail = "ok", "Devin 已安装: "+p
+			return c
+		}
+	}
+	// 再检查 Windsurf（旧产品，兼容）
 	for _, p := range windsurfCandidatesByOS() {
 		if _, err := os.Stat(p); err == nil {
 			c.Status, c.Detail = "ok", "Windsurf 已安装: "+p
 			return c
 		}
 	}
-	c.Status, c.Detail = "warn", "未在常见路径找到 Windsurf（仍可手动指定）"
-	c.FixHint = "下载安装 https://windsurf.com/"
+
+	c.Status, c.Detail = "warn", "未在常见路径找到 Devin 或 Windsurf（仍可手动指定）"
+	c.FixHint = "下载安装 https://devin.ai/desktop"
 	return c
 }
 
+func devinCandidatesByOS() []string {
+	home, _ := os.UserHomeDir()
+	switch runtime.GOOS {
+	case "darwin":
+		return []string{
+			"/Applications/Devin.app",
+			home + "/Applications/Devin.app",
+		}
+	case "windows":
+		appdata := os.Getenv("LOCALAPPDATA")
+		return []string{
+			appdata + `\Programs\Devin\Devin.exe`,
+			`C:\Program Files\Devin\Devin.exe`,
+		}
+	default:
+		return []string{
+			"/usr/share/devin",
+			"/opt/Devin",
+			home + "/.devin",
+		}
+	}
+}
+
 func windsurfCandidatesByOS() []string {
 	home, _ := os.UserHomeDir()
 	switch runtime.GOOS {