feat(conversations): align transcript responses

internal/handler/api/v1/conversation_handler.go

@@ -687,12 +687,16 @@ func (h *ConversationHandler) Transcript(c *gin.Context) {
 	}
 
 	var req struct {
-		Email string `json:"email" binding:"required,email"`
+		Email string `json:"email"`
 	}
 	if err := c.ShouldBindJSON(&req); err != nil {
 		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
 		return
 	}
+	if strings.TrimSpace(req.Email) == "" {
+		c.JSON(http.StatusUnprocessableEntity, gin.H{"error": "email param missing"})
+		return
+	}
 
 	conversation, ok := h.resolveConversationRoute(c, accountID, conversationID)
 	if !ok {
@@ -703,7 +707,7 @@ func (h *ConversationHandler) Transcript(c *gin.Context) {
 		return
 	}
 
-	response.OK(c, nil)
+	c.Status(http.StatusOK)
 }
 
 // UpdateCustomAttributes updates the custom attributes of a conversation.

internal/handler/api/v1/conversation_handler_test.go

@@ -255,14 +255,7 @@ func (s *ConversationHandlerTestSuite) TestTranscript_Success() {
 	s.router.ServeHTTP(w, req)
 
 	assert.Equal(s.T(), http.StatusOK, w.Code)
-
-	var resp struct {
-		Success bool        `json:"success"`
-		Data    interface{} `json:"data"`
-	}
-	err := json.Unmarshal(w.Body.Bytes(), &resp)
-	assert.NoError(s.T(), err)
-	assert.True(s.T(), resp.Success)
+	assert.Empty(s.T(), w.Body.String())
 }
 
 func (s *ConversationHandlerTestSuite) TestTranscript_InvalidAccountID() {
@@ -286,8 +279,11 @@ func (s *ConversationHandlerTestSuite) TestTranscript_MissingEmail() {
 	req.Header.Set("Content-Type", "application/json")
 	s.router.ServeHTTP(w, req)
 
-	// ShouldBindJSON fails when required field is missing
-	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
+	assert.Equal(s.T(), http.StatusUnprocessableEntity, w.Code)
+	var resp map[string]interface{}
+	err := json.Unmarshal(w.Body.Bytes(), &resp)
+	assert.NoError(s.T(), err)
+	assert.Equal(s.T(), "email param missing", resp["error"])
 }
 
 func (s *ConversationHandlerTestSuite) TestTranscript_InvalidEmail() {
@@ -299,8 +295,8 @@ func (s *ConversationHandlerTestSuite) TestTranscript_InvalidEmail() {
 	req.Header.Set("Content-Type", "application/json")
 	s.router.ServeHTTP(w, req)
 
-	// email validation fails via binding:"required,email"
-	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
+	assert.Equal(s.T(), http.StatusOK, w.Code)
+	assert.Empty(s.T(), w.Body.String())
 }
 
 func (s *ConversationHandlerTestSuite) TestTranscript_ConversationNotFound() {