refactor: replace skill code with skill ID across the application

- Updated skill handling to use skill IDs instead of skill codes in various components, services, and models.
- Modified tests to reflect changes in skill identification.
- Removed references to skill codes in favor of skill IDs for consistency and clarity.
- Updated localization files to remove skill code references and adjust error messages accordingly.

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

@@ -3,6 +3,7 @@ package callbacks
 import (
 	"context"
 	"encoding/json"
+	"strconv"
 	"strings"
 	"time"
 
@@ -142,17 +143,19 @@ func (h *RuntimeTraceHandler) tryActivateSkill(argumentsInJSON string) {
 	if err := json.Unmarshal([]byte(strings.TrimSpace(argumentsInJSON)), &args); err != nil {
 		return
 	}
-	code := strings.TrimSpace(args.Skill)
-	if code == "" {
+	skillKey := strings.TrimSpace(args.Skill)
+	if skillKey == "" {
 		return
 	}
-	meta, ok := h.skillMetadataBy[code]
+	meta, ok := h.skillMetadataBy[skillKey]
 	if !ok {
-		meta = SkillMetadata{Code: code}
+		if id, err := strconv.ParseInt(skillKey, 10, 64); err == nil {
+			meta = SkillMetadata{ID: id}
+		}
 	}
 	buf, err := json.Marshal(map[string]any{
-		"source": "eino_skill_tool",
-		"skill":  code,
+		"source":  "eino_skill_tool",
+		"skillId": skillKey,
 	})
 	routeTrace := ""
 	if err == nil {

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

@@ -42,18 +42,18 @@ func TestTryActivateSkill(t *testing.T) {
 	handler := &RuntimeTraceHandler{
 		collector: collector,
 		skillMetadataBy: map[string]SkillMetadata{
-			"after_sales_escalation_skill": {
-				Code:             "after_sales_escalation_skill",
+			"44": {
+				ID:               44,
 				Name:             "售后升级",
 				AllowedToolCodes: []string{"graph/handoff_to_human"},
 			},
 		},
 	}
 
-	handler.tryActivateSkill(`{"skill":"after_sales_escalation_skill"}`)
+	handler.tryActivateSkill(`{"skill":"44"}`)
 
-	if collector.Data.Skill.Code != "after_sales_escalation_skill" {
-		t.Fatalf("unexpected skill code: %#v", collector.Data.Skill)
+	if collector.Data.Skill.ID != 44 {
+		t.Fatalf("unexpected skill id: %#v", collector.Data.Skill)
 	}
 	if collector.Data.Skill.Name != "售后升级" {
 		t.Fatalf("unexpected skill name: %#v", collector.Data.Skill)

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

@@ -52,7 +52,7 @@ func (c *RuntimeTraceCollector) SetSkillMiddleware(enabled bool, toolName string
 }
 
 type SkillMetadata struct {
-	Code             string
+	ID               int64
 	Name             string
 	Description      string
 	AllowedToolCodes []string
@@ -64,20 +64,20 @@ func (c *RuntimeTraceCollector) SetVisibleSkills(skills map[string]SkillMetadata
 	}
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	codes := make([]string, 0, len(skills))
-	for code := range skills {
-		if code == "" {
+	ids := make([]int64, 0, len(skills))
+	for _, skill := range skills {
+		if skill.ID <= 0 {
 			continue
 		}
-		codes = append(codes, code)
+		ids = append(ids, skill.ID)
 	}
-	c.Data.Skill.VisibleCodes = append([]string(nil), codes...)
+	c.Data.Skill.VisibleIDs = append([]int64(nil), ids...)
 }
 
 func (c *RuntimeTraceCollector) ActivateSkill(skill SkillMetadata, routeReason string, routeTrace string) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	c.Data.Skill.Code = skill.Code
+	c.Data.Skill.ID = skill.ID
 	c.Data.Skill.Name = skill.Name
 	c.Data.Skill.Description = skill.Description
 	c.Data.Skill.AllowedToolCodes = append([]string(nil), skill.AllowedToolCodes...)

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

@@ -152,7 +152,7 @@ type RuntimeTraceData struct {
 }
 
 type SkillTraceData struct {
-	Code               string   `json:"code,omitempty"`
+	ID                 int64    `json:"id,omitempty"`
 	Name               string   `json:"name,omitempty"`
 	Description        string   `json:"description,omitempty"`
 	RouteReason        string   `json:"routeReason,omitempty"`
@@ -161,7 +161,7 @@ type SkillTraceData struct {
 	FilteredToolCodes  []string `json:"filteredToolCodes,omitempty"`
 	MiddlewareEnabled  bool     `json:"middlewareEnabled,omitempty"`
 	MiddlewareToolName string   `json:"middlewareToolName,omitempty"`
-	VisibleCodes       []string `json:"visibleCodes,omitempty"`
+	VisibleIDs         []int64  `json:"visibleIds,omitempty"`
 }
 
 type InterruptTraceContext struct {