feat: introduce ToolSourceType enum and refactor related code to use it

internal/ai/runtime/internal/impl/callbacks/agent_trace_handler.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	impladapter "cs-agent/internal/ai/runtime/internal/impl/adapter"
+	"cs-agent/internal/pkg/enums"
 	"cs-agent/internal/pkg/toolx"
 
 	einotool "github.com/cloudwego/eino/components/tool"
@@ -18,7 +19,7 @@ type ToolMetadata struct {
 	ToolCode   string
 	ServerCode string
 	ToolName   string
-	SourceType string
+	SourceType enums.ToolSourceType
 }
 
 type RuntimeTraceHandler struct {
@@ -101,7 +102,7 @@ func (h *RuntimeTraceHandler) WrapInvokableToolCall(_ context.Context, endpoint
 			item.ErrorMessage = err.Error()
 		}
 		h.collector.AddToolItem(item)
-		if metadata, ok := h.resolveToolMetadata(item.ToolName); ok && strings.TrimSpace(metadata.SourceType) == toolx.GraphCreateTicketConfirm.ServerCode {
+		if metadata, ok := h.resolveToolMetadata(item.ToolName); ok && metadata.SourceType == enums.ToolSourceTypeGraph {
 			recommendedAction, riskLevel, ticketDraftReady := parseGraphToolOutcome(item.ToolCode, result)
 			h.collector.AddGraphToolItem(GraphToolTraceItem{
 				ToolCode:          item.ToolCode,

internal/ai/runtime/internal/impl/factory/tool_factory.go

@@ -8,6 +8,7 @@ import (
 	impladapter "cs-agent/internal/ai/runtime/internal/impl/adapter"
 	runtimetooling "cs-agent/internal/ai/runtime/tooling"
 	"cs-agent/internal/models"
+	"cs-agent/internal/pkg/enums"
 	"cs-agent/internal/pkg/toolx"
 
 	einotool "github.com/cloudwego/eino/components/tool"
@@ -34,7 +35,7 @@ func (f *ToolFactory) BuildMCPTools(aiAgent *models.AIAgent) ([]runtimetooling.M
 		if toolCode == "" {
 			toolCode = toolx.BuildMCPToolCode(item.ServerCode, item.ToolName)
 		}
-		if toolx.ResolveToolSourceType(toolCode) != "mcp" {
+		if toolx.ResolveToolSourceType(toolCode) != enums.ToolSourceTypeMCP {
 			continue
 		}
 		serverCode, toolName := toolx.SplitMCPToolCode(toolCode)

internal/ai/runtime/internal/impl/factory/tool_helpers.go

@@ -8,6 +8,7 @@ import (
 	"cs-agent/internal/ai/runtime/registry"
 	runtimetooling "cs-agent/internal/ai/runtime/tooling"
 	"cs-agent/internal/models"
+	"cs-agent/internal/pkg/enums"
 	"cs-agent/internal/pkg/toolx"
 )
 
@@ -37,7 +38,7 @@ func buildRuntimeTraceToolMetadata(
 			ToolCode:   strings.TrimSpace(item.ToolCode),
 			ServerCode: strings.TrimSpace(item.ServerCode),
 			ToolName:   strings.TrimSpace(item.ToolName),
-			SourceType: "mcp",
+			SourceType: enums.ToolSourceTypeMCP,
 		}
 	}
 	for modelName, metadata := range staticToolMetadata {
@@ -45,7 +46,6 @@ func buildRuntimeTraceToolMetadata(
 		metadata.ToolCode = strings.TrimSpace(metadata.ToolCode)
 		metadata.ServerCode = strings.TrimSpace(metadata.ServerCode)
 		metadata.ToolName = strings.TrimSpace(metadata.ToolName)
-		metadata.SourceType = strings.TrimSpace(metadata.SourceType)
 		if modelName == "" || metadata.ToolCode == "" {
 			continue
 		}