refactor: 移除多余依赖，统一 MUI 为唯一 UI 库

- 移除 radix-ui、clsx、tailwind-merge、class-variance-authority、react-router-dom

- 前后端全面适配 MUI 组件，清理残留 Tailwind 工具类引用

- 优化 Agent Loop 引擎、IPC 处理器、Provider Adapter 等后端模块

- 新增 Agent 网络工具通用设计文档 v2

electron/harness/adapters/shared/sse-stream.ts

@@ -166,7 +166,7 @@ export async function* parseSSEStream(
 
         // 非 [DONE] 但 finish_reason 为 tool_calls 时提前 flush 缓冲区
         const finishReason = chunk.choices?.[0]?.finish_reason as string | undefined;
-        if (finishReason === 'tool_calls' || finishReason === 'stop') {
+        if (finishReason === 'tool_calls') {
           for (const [index, buf] of toolCallsBuffer) {
             try {
               yield {