diff --git a/web/backend/api/config_test.go b/web/backend/api/config_test.go
index 1daa4a835..392471094 100644
--- a/web/backend/api/config_test.go
+++ b/web/backend/api/config_test.go
@@ -1,126 +1,126 @@
-package api
-
-import (
-	"bytes"
-	"net/http"
-	"net/http/httptest"
-	"reflect"
-	"testing"
-
-	"github.com/sipeed/picoclaw/pkg/config"
-)
-
-func TestHandleUpdateConfig_PreservesExecAllowRemoteDefaultWhenOmitted(t *testing.T) {
-	configPath, cleanup := setupOAuthTestEnv(t)
-	defer cleanup()
-
-	h := NewHandler(configPath)
-	mux := http.NewServeMux()
-	h.RegisterRoutes(mux)
-
-	req := httptest.NewRequest(http.MethodPut, "/api/config", bytes.NewBufferString(`{
-		"agents": {
-			"defaults": {
-				"workspace": "~/.picoclaw/workspace"
-			}
-		},
-		"model_list": [
-			{
-				"model_name": "custom-default",
-				"model": "openai/gpt-4o",
-				"api_key": "sk-default"
-			}
-		]
-	}`))
-	req.Header.Set("Content-Type", "application/json")
-
-	rec := httptest.NewRecorder()
-	mux.ServeHTTP(rec, req)
-	if rec.Code != http.StatusOK {
-		t.Fatalf("status = %d, want %d, body=%s", rec.Code, http.StatusOK, rec.Body.String())
-	}
-
-	cfg, err := config.LoadConfig(configPath)
-	if err != nil {
-		t.Fatalf("LoadConfig() error = %v", err)
-	}
-	if !cfg.Tools.Exec.AllowRemote {
-		t.Fatal("tools.exec.allow_remote should remain true when omitted from PUT /api/config")
-	}
-}
-
-func TestHandleUpdateConfig_DoesNotInheritDefaultModelFields(t *testing.T) {
-	configPath, cleanup := setupOAuthTestEnv(t)
-	defer cleanup()
-
-	h := NewHandler(configPath)
-	mux := http.NewServeMux()
-	h.RegisterRoutes(mux)
-
-	req := httptest.NewRequest(http.MethodPut, "/api/config", bytes.NewBufferString(`{
-		"agents": {
-			"defaults": {
-				"workspace": "~/.picoclaw/workspace"
-			}
-		},
-		"model_list": [
-			{
-				"model_name": "custom-default",
-				"model": "openai/gpt-4o",
-				"api_key": "sk-default"
-			}
-		]
-	}`))
-	req.Header.Set("Content-Type", "application/json")
-
-	rec := httptest.NewRecorder()
-	mux.ServeHTTP(rec, req)
-	if rec.Code != http.StatusOK {
-		t.Fatalf("status = %d, want %d, body=%s", rec.Code, http.StatusOK, rec.Body.String())
-	}
-
-	cfg, err := config.LoadConfig(configPath)
-	if err != nil {
-		t.Fatalf("LoadConfig() error = %v", err)
-	}
-	if got := cfg.ModelList[0].APIBase; got != "" {
-		t.Fatalf("model_list[0].api_base = %q, want empty string", got)
-	}
-}
-
-func TestHandlePatchConfig_AcceptsFlexibleStringSliceString(t *testing.T) {
-	configPath, cleanup := setupOAuthTestEnv(t)
-	defer cleanup()
-
-	h := NewHandler(configPath)
-	mux := http.NewServeMux()
-	h.RegisterRoutes(mux)
-
-	req := httptest.NewRequest(http.MethodPatch, "/api/config", bytes.NewBufferString(`{
-		"channels": {
-			"irc": {
-				"enabled": true,
-				"server": "irc.example.com:6667",
-				"nick": "testbot",
-				"channels": "general, #ops，dev"
-			}
-		}
-	}`))
-	req.Header.Set("Content-Type", "application/json")
-
-	rec := httptest.NewRecorder()
-	mux.ServeHTTP(rec, req)
-	if rec.Code != http.StatusOK {
-		t.Fatalf("status = %d, want %d, body=%s", rec.Code, http.StatusOK, rec.Body.String())
-	}
-
-	cfg, err := config.LoadConfig(configPath)
-	if err != nil {
-		t.Fatalf("LoadConfig() error = %v", err)
-	}
-
-	want := config.FlexibleStringSlice{"general", "#ops", "dev"}
-	if !reflect.DeepEqual(cfg.Channels.IRC.Channels, want) {
-		t.Fatalf("channels.irc.channels = %#v, want %#v", cfg.Channels.IRC.Channels, want)
-	}
-}
+package api
+
+import (
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"testing"
+
+	"github.com/sipeed/picoclaw/pkg/config"
+)
+
+func TestHandleUpdateConfig_PreservesExecAllowRemoteDefaultWhenOmitted(t *testing.T) {
+	configPath, cleanup := setupOAuthTestEnv(t)
+	defer cleanup()
+
+	h := NewHandler(configPath)
+	mux := http.NewServeMux()
+	h.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodPut, "/api/config", bytes.NewBufferString(`{
+		"agents": {
+			"defaults": {
+				"workspace": "~/.picoclaw/workspace"
+			}
+		},
+		"model_list": [
+			{
+				"model_name": "custom-default",
+				"model": "openai/gpt-4o",
+				"api_key": "sk-default"
+			}
+		]
+	}`))
+	req.Header.Set("Content-Type", "application/json")
+
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d, want %d, body=%s", rec.Code, http.StatusOK, rec.Body.String())
+	}
+
+	cfg, err := config.LoadConfig(configPath)
+	if err != nil {
+		t.Fatalf("LoadConfig() error = %v", err)
+	}
+	if !cfg.Tools.Exec.AllowRemote {
+		t.Fatal("tools.exec.allow_remote should remain true when omitted from PUT /api/config")
+	}
+}
+
+func TestHandleUpdateConfig_DoesNotInheritDefaultModelFields(t *testing.T) {
+	configPath, cleanup := setupOAuthTestEnv(t)
+	defer cleanup()
+
+	h := NewHandler(configPath)
+	mux := http.NewServeMux()
+	h.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodPut, "/api/config", bytes.NewBufferString(`{
+		"agents": {
+			"defaults": {
+				"workspace": "~/.picoclaw/workspace"
+			}
+		},
+		"model_list": [
+			{
+				"model_name": "custom-default",
+				"model": "openai/gpt-4o",
+				"api_key": "sk-default"
+			}
+		]
+	}`))
+	req.Header.Set("Content-Type", "application/json")
+
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d, want %d, body=%s", rec.Code, http.StatusOK, rec.Body.String())
+	}
+
+	cfg, err := config.LoadConfig(configPath)
+	if err != nil {
+		t.Fatalf("LoadConfig() error = %v", err)
+	}
+	if got := cfg.ModelList[0].APIBase; got != "" {
+		t.Fatalf("model_list[0].api_base = %q, want empty string", got)
+	}
+}
+
+func TestHandlePatchConfig_AcceptsFlexibleStringSliceString(t *testing.T) {
+	configPath, cleanup := setupOAuthTestEnv(t)
+	defer cleanup()
+
+	h := NewHandler(configPath)
+	mux := http.NewServeMux()
+	h.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodPatch, "/api/config", bytes.NewBufferString(`{
+		"channels": {
+			"irc": {
+				"enabled": true,
+				"server": "irc.example.com:6667",
+				"nick": "testbot",
+				"channels": "general, #ops，dev"
+			}
+		}
+	}`))
+	req.Header.Set("Content-Type", "application/json")
+
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d, want %d, body=%s", rec.Code, http.StatusOK, rec.Body.String())
+	}
+
+	cfg, err := config.LoadConfig(configPath)
+	if err != nil {
+		t.Fatalf("LoadConfig() error = %v", err)
+	}
+
+	want := config.FlexibleStringSlice{"general", "#ops", "dev"}
+	if !reflect.DeepEqual(cfg.Channels.IRC.Channels, want) {
+		t.Fatalf("channels.irc.channels = %#v, want %#v", cfg.Channels.IRC.Channels, want)
+	}
+}