feat: 核心智能体默认使用气泡对话 (#17)

README.md

@@ -2,4 +2,6 @@
 
 This repository contains the core DesireCore Agent definition, persona, principles, and skills. [中文说明](./README.zh-CN.md).
 
+The core Agent declares `ui.chat_bubble_mode: "classic"` for bubble-style conversations. This affects only this Agent; the platform default and other Agents remain unchanged. Clients supporting Agent-level message styles read this optional field; removing it restores the platform preference.
+
 The Solver Report Web is maintained independently in [desirecore-agent/solver-report-web](https://github.com/desirecore-agent/solver-report-web), under the **desirecore-agent organization**. Web source, build tools, dependencies, and report evidence do not belong in this Agent repository or its bootstrap archive. The former Web-only history is preserved in the new repository's `archive/web-history` branch.

README.zh-CN.md

@@ -2,4 +2,6 @@
 
 本仓库仅管理 DesireCore 核心智能体定义、人格、原则和技能。[English](./README.md)。
 
+核心智能体通过 `ui.chat_bubble_mode: "classic"` 使用气泡式对话。该配置仅作用于此智能体，平台默认及其他智能体保持不变。支持智能体级消息样式的客户端读取此可选字段；删除后恢复跟随平台偏好。
+
 求解器验证书 Web 由 **desirecore-agent 组织**下的 [desirecore-agent/solver-report-web](https://github.com/desirecore-agent/solver-report-web) 独立管理。Web 源码、构建工具、依赖和报告证据不属于本智能体仓库或其 bootstrap 压缩包。原 Web 专属历史保留在新仓库的 `archive/web-history` 分支。

agent.json

@@ -2,7 +2,7 @@
   "name": "DesireCore",
   "$schema": "http://desirecore/schemas/agent-seed.json",
   "id": "7da73b7f-bb08-4e7b-a3cf-5d4af6e22c7f",
-  "version": "1.14.2",
+  "version": "1.14.3",
   "requiredClientVersion": "10.0.170",
   "description": "系统中枢调度器，负责任务分发、Agent 编排与全局状态监控",
   "author": "DesireCore Team",
@@ -17,6 +17,9 @@
       "path": "assets/avatar.webp"
     }
   },
+  "ui": {
+    "chat_bubble_mode": "classic"
+  },
   "default_enabled": {
     "skills": [
       "create-agent",