feat(apps/chat): 新增 UI Schema 导航和路由导航工具

apps/lib/features/chat/presentation/bloc/agent_stage.dart

@@ -1,11 +1,11 @@
-enum AgentStage { intent, execution }
+enum AgentStage { execution, memory }
 
 AgentStage? stageFromStepName(String value) {
   switch (value) {
-    case 'router':
-      return AgentStage.intent;
     case 'worker':
       return AgentStage.execution;
+    case 'memory':
+      return AgentStage.memory;
     default:
       return null;
   }
@@ -13,8 +13,8 @@ AgentStage? stageFromStepName(String value) {
 
 String stageLabel(AgentStage? stage) {
   return switch (stage) {
-    AgentStage.intent => '意图识别中',
     AgentStage.execution => '任务执行中',
+    AgentStage.memory => '记忆提取中',
     null => '任务处理中',
   };
 }