feat(captain): gate custom tools

internal/service/captain_custom_tool_service.go

@@ -20,8 +20,9 @@ import (
 // CaptainCustomToolService implements business logic for CaptainCustomTool operations.
 // Reference: Chatwoot enterprise/app/controllers/api/v1/captain/custom_tools_controller.rb
 type CaptainCustomToolService struct {
-	toolRepo   *repository.CaptainCustomToolRepo
-	httpClient HTTPDoer
+	toolRepo    *repository.CaptainCustomToolRepo
+	accountRepo *repository.AccountRepo
+	httpClient  HTTPDoer
 }
 
 type HTTPDoer interface {
@@ -29,8 +30,12 @@ type HTTPDoer interface {
 }
 
 // NewCaptainCustomToolService creates a new CaptainCustomToolService.
-func NewCaptainCustomToolService(toolRepo *repository.CaptainCustomToolRepo) *CaptainCustomToolService {
-	return &CaptainCustomToolService{toolRepo: toolRepo, httpClient: &http.Client{Timeout: 30 * time.Second}}
+func NewCaptainCustomToolService(toolRepo *repository.CaptainCustomToolRepo, accountRepo ...*repository.AccountRepo) *CaptainCustomToolService {
+	svc := &CaptainCustomToolService{toolRepo: toolRepo, httpClient: &http.Client{Timeout: 30 * time.Second}}
+	if len(accountRepo) > 0 {
+		svc.accountRepo = accountRepo[0]
+	}
+	return svc
 }
 
 func (s *CaptainCustomToolService) SetHTTPClient(client HTTPDoer) {
@@ -39,6 +44,17 @@ func (s *CaptainCustomToolService) SetHTTPClient(client HTTPDoer) {
 	}
 }
 
+func (s *CaptainCustomToolService) CustomToolsEnabled(ctx context.Context, accountID uint) bool {
+	if s.accountRepo == nil {
+		return true
+	}
+	account, err := s.accountRepo.FindByID(ctx, accountID)
+	if err != nil {
+		return false
+	}
+	return featureFlagStringEnabled(account.FeatureFlags, "custom_tools") || featureFlagStringEnabled(account.FeatureFlags, "captain_integration_v2")
+}
+
 // --- Request DTOs ---
 
 // CreateCustomToolRequest is the DTO for creating a custom tool.