[moz] feat(frontend): 工具链面板加 from/to 显示 + 筛选 + 修复事件类型未知

- 前端：列表项加 from → to 标签（Agent 中文名）
- 前端：加「全部 / 未处理」筛选按钮
- 前端：详情区也显示 from → to
- 后端：ToolchainContextSection 修复事件类型 fallback 为中文标签
- 后端：加来源/指派信息到 prompt 消息体

src/daemon/toolchain_handler.py

@@ -51,17 +51,41 @@ class ToolchainContextSection:
     name: str = "toolchain_context"
     priority: int = 10
 
+    EVENT_LABELS_ZH: Dict[str, str] = {
+        "review_request": "Review 请求",
+        "review_result": "Review 结果",
+        "review_merged": "PR 合并",
+        "review_comment": "Review 评论",
+        "review_updated": "Review 更新",
+        "ci_failure": "CI 失败",
+        "deploy_failure": "部署失败",
+        "issue_assigned": "Issue 指派",
+        "mention": "@提及",
+    }
+
     def render(self, context: PromptContext) -> str:
         event_type = context.event_type
         event_data: Dict = context.event_data or {}
 
+        # 事件类型中文标签
+        event_label = self.EVENT_LABELS_ZH.get(event_type, event_type or '未知')
+
+        # from / to 信息
+        to_agent = context.agent_id or ''
+        from_agent = 'system'
+
         # Part 1: 事件信息(现有模板引擎)
         if event_type in _TEMPLATE_MAP:
             variables = {k: str(v) for k, v in event_data.items()}
             event_text = render_template(event_type, variables)
+            # 补充事件类型中文标签 + from/to
+            header = f"- **事件类型**: {event_label}\n- **来源**: {from_agent}\n- **指派**: {to_agent}\n"
+            event_text = header + "\n" + event_text
         else:
             lines = ["## 工具链事件", ""]
-            lines.append(f"- **事件类型**: {event_type or '未知'}")
+            lines.append(f"- **事件类型**: {event_label}")
+            lines.append(f"- **来源**: {from_agent}")
+            lines.append(f"- **指派**: {to_agent}")
             if event_data:
                 lines.append("- **事件详情**:")
                 for key, value in event_data.items():