feat(captain): align custom tool limits

internal/handler/api/v1/captain_custom_tool_crud_handler_test.go

@@ -5,7 +5,9 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
+	"regexp"
 	"strconv"
+	"strings"
 	"testing"
 
 	"github.com/gin-gonic/gin"
@@ -163,6 +165,87 @@ func (s *CaptainCustomToolCRUDTestSuite) TestCreate_默认GET方法() {
 	assert.Equal(s.T(), "GET", resp["http_method"]) // default HTTP method
 }
 
+func (s *CaptainCustomToolCRUDTestSuite) TestCreate_省略Slug时使用ChatwootCustom前缀和下划线() {
+	body := map[string]interface{}{
+		"custom_tool": map[string]interface{}{
+			"title":        "Lookup Order",
+			"endpoint_url": "https://example.com/orders",
+		},
+	}
+
+	w := s.makeRequest("POST", s.accountPath()+"/captain/custom_tools/", body)
+	assert.Equal(s.T(), http.StatusOK, w.Code)
+
+	var resp map[string]interface{}
+	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &resp))
+	assert.Equal(s.T(), "custom_lookup_order", resp["slug"])
+}
+
+func (s *CaptainCustomToolCRUDTestSuite) TestCreate_重复标题Slug追加随机后缀() {
+	body := map[string]interface{}{
+		"custom_tool": map[string]interface{}{
+			"title":        "Lookup Order",
+			"endpoint_url": "https://example.com/orders",
+		},
+	}
+
+	w1 := s.makeRequest("POST", s.accountPath()+"/captain/custom_tools/", body)
+	s.Require().Equal(http.StatusOK, w1.Code)
+	w2 := s.makeRequest("POST", s.accountPath()+"/captain/custom_tools/", body)
+	s.Require().Equal(http.StatusOK, w2.Code)
+
+	var first, second map[string]interface{}
+	s.Require().NoError(json.Unmarshal(w1.Body.Bytes(), &first))
+	s.Require().NoError(json.Unmarshal(w2.Body.Bytes(), &second))
+	assert.Equal(s.T(), "custom_lookup_order", first["slug"])
+	assert.NotEqual(s.T(), first["slug"], second["slug"])
+	assert.Regexp(s.T(), regexp.MustCompile(`^custom_lookup_order_[a-z0-9]{6}$`), second["slug"])
+}
+
+func (s *CaptainCustomToolCRUDTestSuite) TestCreate_生成Slug最长64字符() {
+	body := map[string]interface{}{
+		"custom_tool": map[string]interface{}{
+			"title":        strings.Repeat("Very Long Title ", 10),
+			"endpoint_url": "https://example.com/long",
+		},
+	}
+
+	w := s.makeRequest("POST", s.accountPath()+"/captain/custom_tools/", body)
+	assert.Equal(s.T(), http.StatusOK, w.Code)
+
+	var resp map[string]interface{}
+	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &resp))
+	slug := resp["slug"].(string)
+	assert.LessOrEqual(s.T(), len(slug), 64)
+	assert.True(s.T(), strings.HasPrefix(slug, "custom_"))
+}
+
+func (s *CaptainCustomToolCRUDTestSuite) TestCreate_超过每账户15个工具返回422() {
+	for i := 0; i < 15; i++ {
+		body := map[string]interface{}{
+			"custom_tool": map[string]interface{}{
+				"title":        "Limit Tool " + strconv.Itoa(i),
+				"slug":         "limit-tool-" + strconv.Itoa(i),
+				"endpoint_url": "https://example.com/limit" + strconv.Itoa(i),
+			},
+		}
+		w := s.makeRequest("POST", s.accountPath()+"/captain/custom_tools/", body)
+		s.Require().Equal(http.StatusOK, w.Code)
+	}
+
+	w := s.makeRequest("POST", s.accountPath()+"/captain/custom_tools/", map[string]interface{}{
+		"custom_tool": map[string]interface{}{
+			"title":        "One Too Many",
+			"endpoint_url": "https://example.com/too-many",
+		},
+	})
+
+	assert.Equal(s.T(), http.StatusUnprocessableEntity, w.Code)
+	var resp map[string]interface{}
+	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &resp))
+	assert.Equal(s.T(), "You can create a maximum of 15 custom tools per account", resp["error"])
+}
+
 func (s *CaptainCustomToolCRUDTestSuite) TestCreate_无效JSON返回400() {
 	// ShouldBindJSON 在 JSON 解析失败时返回 400
 	w := httptest.NewRecorder()

internal/handler/api/v1/captain_custom_tool_handler.go

@@ -1,6 +1,7 @@
 package v1
 
 import (
+	"errors"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
@@ -42,6 +43,10 @@ func (h *CaptainCustomToolHandler) Create(c *gin.Context) {
 	tool, err := h.svc.Create(c.Request.Context(), accountID, &req)
 	if err != nil {
 		applogger.L().Errorf("Create captain custom tool: %v", err)
+		if errors.Is(err, service.ErrCaptainCustomToolLimitExceeded) {
+			c.JSON(http.StatusUnprocessableEntity, gin.H{"error": service.ErrCaptainCustomToolLimitExceeded.Error()})
+			return
+		}
 		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to create custom tool")
 		return
 	}

internal/handler/api/v1/captain_resource_parity_handler_test.go

@@ -195,7 +195,7 @@ func TestCaptainCustomToolHandler_ChatwootToolPayloadsAndScope(t *testing.T) {
 	var created map[string]any
 	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &created))
 	assert.NotContains(t, created, "success")
-	assert.Equal(t, "lookup-order", created["slug"])
+	assert.Equal(t, "custom_lookup_order", created["slug"])
 	assert.Equal(t, "POST", created["http_method"])
 	toolID := uint(created["id"].(float64))