refactor: unify skills+cli runtime and streamline ag-ui flow

docs/protocols/agent/sse-events.md

@@ -242,11 +242,8 @@ SSE 协议中的工具名字段保持后端原样，不做服务端翻译：
   "stage": "worker",
   "status": "success" | "partial_success" | "failed",
   "answer": "...",
-  "key_points": [],
-  "result_type": "execution_report" | "clarification" | "error_report" | "unknown",
   "suggested_actions": [],
-  "error": null,
-  "ui_schema": {}
+  "error": null
 }
 ```
 
@@ -427,5 +424,5 @@ WHERE (visibility_mask & 2) != 0
 | agent 输出 visibility_mask | `UI_HISTORY \| CONTEXT_ASSEMBLY`（memory stage 仅 `UI_HISTORY`） | `UI_HISTORY` |
 | 进入 /history | ✅ | ✅（仅 agent 输出） |
 | 进入 context assembly | ✅（自动） | ❌（通过 run_input 注入） |
-| enabled_tools 来源 | `system_agents.yaml` worker 配置 | `AutomationJob.config.enabled_tools` |
+| enabled_skills 来源 | `system_agents.yaml` worker 配置 | `AutomationJob.config.enabled_skills` |
 | context 配置来源 | `system_agents.yaml` router context_messages | `AutomationJob.config.context` |