cockpit v2.2: stream Bricks widgets for frontend rendering

- Each tool progress yields a progress Text widget
- Each tool result yields a card widget (VBox with colored left border)
- Final reply yields a reply card widget
- Colors: green=success, red=error, purple=reply, amber=progress
- Frontend: parse NDJSON → bricks.buildWidget() → append to chat

wwwroot/api/cockpit_chat.dspy

@@ -280,6 +280,37 @@ async def _exec(sor, tool, params, ctx, uid, org_id):
         return f"错误: {str(e)[:300]}"
 
 
+# ── Widget Builders ──
+
+def _text(content):
+    return {"widgettype":"Text","options":{"text":content,"css":"agent-text"}}
+
+def _widget_card(title, body, kind="success"):
+    """Bricks widget: a card with title + body."""
+    colors = {"success":"#10b981","error":"#ef4444","reply":"#6366f1","progress":"#f59e0b"}
+    color = colors.get(kind, "#6b7280")
+    return {
+        "widgettype":"VBox",
+        "options":{"css":"agent-card","style":{"borderLeft":f"3px solid {color}","padding":"8px 12px","margin":"4px 0"}},
+        "subwidgets":[
+            {"widgettype":"Text","options":{"text":title,"css":"agent-card-title","style":{"fontWeight":"bold","fontSize":"13px","color":color}}},
+            body
+        ]
+    }
+
+def _widget_progress(text):
+    return {"widgettype":"Text","options":{"text":text,"css":"agent-progress","style":{"color":"#f59e0b","fontSize":"12px","padding":"2px 8px"}}}
+
+_tool_names = {
+    'switch_project':'切换项目','create_project':'创建项目','create_task':'创建任务',
+    'list_tasks':'查询任务','add_repo':'关联仓库','list_repos':'查看仓库',
+    'check_progress':'检查进度','add_bug':'报告Bug','list_bugs':'查看Bug',
+    'get_deliverable':'获取交付件','shell_exec':'执行命令','list_skills':'查看技能',
+}
+def _tool_label(tool):
+    return _tool_names.get(tool, tool)
+
+
 # ── Streaming Agent Loop ──
 
 if action == 'send_message':
@@ -291,18 +322,19 @@ if action == 'send_message':
 
     blocked, reason = _security_scan(message_text)
     if blocked:
-        return json.dumps({"success":True,"agent_reply":f"⚠️ {reason}","intent":"security_blocked","context":{}}, ensure_ascii=False)
+        # Return widget directly for blocked case (no streaming needed)
+        w = _widget_card("⚠️ 安全拦截", _text(reason), "error")
+        return json.dumps({"success":True,"agent_reply":f"⚠️ {reason}","widget":w}, ensure_ascii=False)
 
     uid = await get_user()
     org_id = await get_userorgid() or '0'
 
     async def agent_stream():
-        """Async generator: yield progress chunks to frontend."""
         async with DBPools().sqlorContext(dbname) as sor:
             ctx = await _load_ctx(sor, uid)
             model = await _sel_model(sor, user_model_id)
             if not model:
-                yield json.dumps({"type":"error","message":"No active LLM configured"}, ensure_ascii=False) + '\n'
+                yield json.dumps({"type":"widget","widget":_widget_card("❌ 错误", _text("没有可用的LLM模型配置"),"error")}, ensure_ascii=False) + '\n'
                 return
 
             repos_str = ', '.join([r['n'] for r in ctx['repos']]) or '无'
@@ -322,7 +354,7 @@ if action == 'send_message':
                 try:
                     raw = await _call_llm(model, msgs, 0.4)
                 except Exception as e:
-                    yield json.dumps({"type":"error","message":f"LLM: {str(e)[:200]}"}, ensure_ascii=False) + '\n'
+                    yield json.dumps({"type":"widget","widget":_widget_card("❌ LLM错误", _text(str(e)[:200]),"error")}, ensure_ascii=False) + '\n'
                     return
 
                 act = _parse(raw)
@@ -333,13 +365,21 @@ if action == 'send_message':
                 if act.get('action') == 'tool_call':
                     tool = act.get('tool','')
                     tparams = act.get('params',{})
-                    # Stream: 告知前端正在做什么
-                    yield json.dumps({"type":"progress","tool":tool,"params":tparams}, ensure_ascii=False) + '\n'
+                    tool_label = _tool_label(tool)
+
+                    # Widget: 工具执行中
+                    yield json.dumps({"type":"widget","widget":_widget_progress(f"🔄 {tool_label}")}, ensure_ascii=False) + '\n'
 
                     result = await _exec(sor, tool, tparams, ctx, uid, org_id)
+                    ok = not result.startswith("错误") and not result.startswith("失败")
 
-                    # Stream: 告知前端执行结果
-                    yield json.dumps({"type":"tool_result","tool":tool,"result":result[:500]}, ensure_ascii=False) + '\n'
+                    # Widget: 工具结果
+                    result_widget = _widget_card(
+                        f"{'✅' if ok else '❌'} {tool_label}",
+                        _text(result[:500]),
+                        "success" if ok else "error"
+                    )
+                    yield json.dumps({"type":"widget","widget":result_widget}, ensure_ascii=False) + '\n'
 
                     msgs.append({"role":"assistant","content":raw})
                     msgs.append({"role":"user","content":f"工具 {tool} 执行结果:\n{result}"})
@@ -353,7 +393,13 @@ if action == 'send_message':
 
             await sor.C('pipeline_conversations',{'id':getID(),'iteration_id':'','task_id':'','role':'agent','content':agent_reply,'attachments':'[]','msg_type':'text','org_id':org_id,'created_by':'system'})
 
-            yield json.dumps({"type":"done","message":agent_reply,"context":ctx['pname']}, ensure_ascii=False) + '\n'
+            # Widget: 最终回复
+            final_widget = _widget_card(
+                f"🤖 驾驶舱 Agent",
+                _text(agent_reply),
+                "reply"
+            )
+            yield json.dumps({"type":"widget","widget":final_widget}, ensure_ascii=False) + '\n'
 
     return await stream_response(request, agent_stream(), 'application/x-ndjson')