feat: markdown table format for list_tasks with emoji

pipeline_service/agent_loop_v2.py

@@ -603,13 +603,21 @@ class AgentExecutor:
         if not recs:
             return "暂无任务"
 
-        lines = []
+        # 状态图标映射
+        icons = {
+            "submitted": "⏳", "running": "🔄", "review": "👀",
+            "approved": "✅", "completed": "✔️", "failed": "❌",
+            "waiting": "⏸️",
+        }
+        lines = ["| 状态 | 任务 | 角色 | ID |",
+                 "|------|------|------|----|"]
         for r in recs:
-            lines.append(
-                f"- [{getattr(r, 'state', '?')}] {getattr(r, 'title', '')} "
-                f"(角色: {getattr(r, 'role', '')}) "
-                f"id={getattr(r, 'id', '')[:8]}"
-            )
+            st = getattr(r, 'state', '?')
+            icon = icons.get(st, "❓")
+            title = (getattr(r, 'title', '') or '')[:60]
+            role = getattr(r, 'role', '')
+            tid = getattr(r, 'id', '')[:8]
+            lines.append(f"| {icon} {st} | {title} | {role} | {tid} |")
         return "\n".join(lines)
 
     async def _t_task_detail(self, sor, p, pid):