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/application/runtime/summary_builder.go

@@ -13,7 +13,7 @@ func toSummary(summary *executor.RunResult) *Summary {
 		RunID:                 summary.RunID,
 		Status:                summary.Status,
 		ReplyText:             summary.ReplyText,
-		PlannedSkillCode:      strings.TrimSpace(summary.SelectedSkillCode),
+		PlannedSkillID:        summary.SelectedSkillID,
 		PlannedSkillName:      strings.TrimSpace(summary.SelectedSkillName),
 		PlanReason:            strings.TrimSpace(summary.SkillRouteReason),
 		SkillRouteTrace:       strings.TrimSpace(summary.SkillRouteTrace),

internal/ai/application/runtime/types.go

@@ -33,7 +33,7 @@ type Summary struct {
 	RunID                 string
 	Status                string
 	ReplyText             string
-	PlannedSkillCode      string
+	PlannedSkillID        int64
 	PlannedSkillName      string
 	PlanReason            string
 	SkillRouteTrace       string