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/agent-loop/engine.ts

@@ -44,6 +44,9 @@ const DEFAULT_CONFIG: AgentLoopConfig = {
   contextWindow: 128_000,
   retryCount: 3,
   temperature: 0.0,
+  maxTokens: 63488,
+  thinkingEnabled: true,
+  thinkingEffort: 'high',
 };
 
 /**
@@ -157,11 +160,11 @@ export class AgentLoopEngine extends EventEmitter {
           messages,
           tools: this.tools.length > 0 ? this.tools : undefined,
           params: {
-            maxTokens: 63488,
+            maxTokens: this.config.maxTokens,
             temperature: this.config.temperature,
             stream: true,
-            thinkingEnabled: true,
-            thinkingEffort: 'high',
+            thinkingEnabled: this.config.thinkingEnabled,
+            thinkingEffort: this.config.thinkingEffort,
             contextLength: this.config.contextLength,
           },
         };
@@ -254,9 +257,12 @@ export class AgentLoopEngine extends EventEmitter {
       let tokenUsage: TokenUsage | undefined;
 
       // 流式接收响应
-      for await (const event of this.adapter.chatStream(request)) {
+      for await (const event of this.chatStreamWithRetry(request)) {
         if (this.aborted) break;
 
+        // 过滤掉每轮的 DONE 事件 — 只在全部迭代完成后发送一个最终 DONE
+        if (event.type === MetonaStreamEventType.DONE) continue;
+
         // 转发流式事件到渲染进程
         this.emit('streamEvent', event);
 
@@ -299,9 +305,6 @@ export class AgentLoopEngine extends EventEmitter {
             }
             break;
 
-          case MetonaStreamEventType.DONE:
-            break;
-
           case MetonaStreamEventType.ERROR:
             if (event.error) {
               throw new Error(event.error.message);
@@ -313,18 +316,21 @@ export class AgentLoopEngine extends EventEmitter {
       // 处理缓冲区中的工具调用（TOOL_CALL_DELTA 拼接）
       if (toolCallsBuffer.size > 0 && (!step.toolCalls || step.toolCalls.length === 0)) {
         step.toolCalls = [];
-        for (const [index, buf] of toolCallsBuffer) {
+        for (const [, buf] of toolCallsBuffer) {
+          let args: Record<string, unknown>;
           try {
-            step.toolCalls.push({
-              id: `tc_${nanoid(8)}`,
-              name: buf.name,
-              args: buf.argsBuffer ? JSON.parse(buf.argsBuffer) : {},
-              iteration: this.currentIteration,
-              timestamp: Date.now(),
-            });
+            args = buf.argsBuffer ? JSON.parse(buf.argsBuffer) : {};
           } catch {
-            // JSON 解析失败，跳过
+            // JSON 解析失败，使用空参数（LLM 仍请求了该工具调用）
+            args = {};
           }
+          step.toolCalls.push({
+            id: `tc_${nanoid(8)}`,
+            name: buf.name,
+            args,
+            iteration: this.currentIteration,
+            timestamp: Date.now(),
+          });
         }
       }
 
@@ -361,7 +367,7 @@ export class AgentLoopEngine extends EventEmitter {
 
           // 转发工具结果到渲染进程
           this.emit('streamEvent', {
-            type: 'tool_result',
+            type: MetonaStreamEventType.TOOL_RESULT,
             requestId: request.meta.requestId,
             sessionId,
             iteration: this.currentIteration,
@@ -444,10 +450,37 @@ export class AgentLoopEngine extends EventEmitter {
     return toolResult;
   }
 
+  /**
+   * 带重试的流式调用
+   *
+   * 如果 adapter 抛出错误，在 retryCount 次数内重试，每次等待 1 秒。
+   */
+  private async *chatStreamWithRetry(request: MetonaRequest): AsyncIterable<MetonaStreamEvent> {
+    let lastError: unknown;
+    for (let attempt = 0; attempt <= this.config.retryCount; attempt++) {
+      try {
+        yield* this.adapter.chatStream(request);
+        return;
+      } catch (error) {
+        lastError = error;
+        if (attempt < this.config.retryCount) {
+          await new Promise((resolve) => setTimeout(resolve, 1000));
+        }
+      }
+    }
+    throw lastError;
+  }
+
   private async transitionTo(state: AgentLoopState): Promise<void> {
     const previous = this.currentState;
     this.currentState = state;
-    this.emit('stateChange', { previous, current: state });
+    this.emit('stateChange', {
+      previous,
+      current: state,
+      state,
+      sessionId: this.currentSessionId,
+      iteration: this.currentIteration,
+    });
   }
 
   private accumulateTokens(usage: TokenUsage): void {
@@ -461,6 +494,16 @@ export class AgentLoopEngine extends EventEmitter {
     answer?: string,
     error?: Error,
   ): AgentLoopOutput {
+    // 发送唯一的最终 DONE 事件 — UI 只在此处结束流式状态
+    this.emit('streamEvent', {
+      type: MetonaStreamEventType.DONE,
+      requestId: this.currentRequestId,
+      sessionId: this.currentSessionId,
+      iteration: this.currentIteration,
+      seq: 0,
+      timestamp: Date.now(),
+    });
+
     this.currentState = AgentLoopState.TERMINATED;
     return {
       finalAnswer: answer ?? (error ? error.message : 'No answer produced'),