feat: v0.7.2 安全收口 · 断链接线 · 观测补洞 — 230 用例扩充与全量回归

P1 修复面收口: /clear 全链路根治(前端清空联动 DB messages+摘要游标+TRACE 快照,
IPC 语义改"操作完成"; 流式中拒绝); web_browser open 补 SSRF 校验(Chromium 旁路关闭,
与 web_fetch/http_request 同源 validateSSRF); MCP 工具结果纳入注入扫描(mcp_* 前缀
按网络来源同级 full 模式, 收敛 resolveScanMode 单点); Trace 落库/入 store 双重瘦身
(tool_result base64/超长字段剥离, metadata 防 MB 级膨胀); 文本附件 512KB 闸门
(file.slice 首段读取+truncated 标志随消息持久化+主进程附件提示感知截断);
单实例锁(requestSingleInstanceLock + second-instance 聚焦已有窗口)

P2 安全纵深: ConfirmationHook 多窗口化(确认请求/超时提示改全窗口广播,
getAllWindows 空时回退 mainWindow, fail-closed 判定升级双通道); mcp_servers.headers
全链路接线(safeParseHeaders 容错解析+SSE/StreamableHTTP requestInit 注入+IPC 逐项
校验+设置页 JSON 输入, 远程 MCP 鉴权头可用)

P3 断链接线: llm:listModels IPC(六家 adapter 动态模型发现首次接线, 配置完整性
前置校验); Ollama pullModel IPC+设置页下载卡片(进度/取消/能力徽标, v0.7.0 死代码
激活); 后台会话运行指示(sessionRunStates 图+Sidebar 状态点, 多会话并发可见);
IR 卫生(移除 THINKING_START/END 死枚举, constraints 标注预留)

P4 质量与文档: i18n 第二阶段(确认弹框/侧栏/状态栏/AgentMonitor/终止原因出层,
外观设置 zh-CN/en-US 切换, ui.locale 持久化, 渲染时求值规避异步注册); README/D1
文档对齐(http_request 风险等级/用例数/实现状态注记); 版本号 0.7.2

测试: 507 → 737 用例(+230, 11 个新文件)。覆盖补齐: context-builder/consolidator/
orchestrator/workspace.service/session-recorder/config-layering/secure-config/
network-proxy + IPC mcp/tasks/memory/app/data 域 + 渲染层 store 与流事件管线纯函数。
测试驱动修复: workspace.appendMemory 中文分区 \b 词边界失效(JS \b 不含 CJK),
固化条目恒追加文件末尾产生重复分区头 → (?=\n|$) 前瞻断言根治

回归: typecheck 双端 0 错误; ESLint 0/0; 系统 Node 687 通过 50 跳过;
Electron ABI 全量 737/737 零跳过

electron/utils/__tests__/network-proxy.test.ts

@@ -0,0 +1,138 @@
+/**
+ * Network Proxy 测试（v0.7.2 覆盖补齐 —— 此前零测试）
+ *
+ * 锁定 session 级代理应用契约（v0.6.4 P4-5 的回归防线）：
+ * 1. 配置 proxyUrl → Chromium 双分区（default + agent-browser）+ undici ProxyAgent
+ * 2. 环境变量回退（HTTPS_PROXY/HTTP_PROXY）
+ * 3. 双空 → 显式直连（direct mode + 直连 Agent）
+ * 4. 失败语义：任一通道失败仅 WARN 不阻断主流程
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+const sessionMocks = vi.hoisted(() => ({
+  defaultSetProxy: vi.fn(async (..._args: unknown[]) => undefined),
+  partitionSetProxy: vi.fn(async (..._args: unknown[]) => undefined),
+  throwOnDefaultSetProxy: false,
+}));
+
+vi.mock('electron', () => ({
+  session: {
+    defaultSession: {
+      setProxy: (...args: unknown[]) => {
+        if (sessionMocks.throwOnDefaultSetProxy) {
+          return Promise.reject(new Error('setProxy exploded'));
+        }
+        return sessionMocks.defaultSetProxy(...args);
+      },
+    },
+    fromPartition: () => ({
+      setProxy: (...args: unknown[]) => sessionMocks.partitionSetProxy(...args),
+    }),
+  },
+}));
+
+vi.mock('electron-log', () => ({
+  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
+}));
+
+const undiciMocks = vi.hoisted(() => ({
+  setGlobalDispatcher: vi.fn(),
+  proxyAgentCalls: [] as string[],
+  agentCalls: 0,
+}));
+
+vi.mock('undici', () => ({
+  Agent: class {
+    constructor() {
+      undiciMocks.agentCalls++;
+    }
+  },
+  ProxyAgent: class {
+    constructor(opts: { uri: string }) {
+      undiciMocks.proxyAgentCalls.push(opts.uri);
+    }
+  },
+  setGlobalDispatcher: (...args: unknown[]) => undiciMocks.setGlobalDispatcher(...args),
+}));
+
+import { applySessionProxy } from '../network-proxy';
+
+beforeEach(() => {
+  sessionMocks.defaultSetProxy.mockClear();
+  sessionMocks.partitionSetProxy.mockClear();
+  sessionMocks.throwOnDefaultSetProxy = false;
+  undiciMocks.setGlobalDispatcher.mockClear();
+  undiciMocks.proxyAgentCalls.length = 0;
+  undiciMocks.agentCalls = 0;
+  delete process.env['HTTPS_PROXY'];
+  delete process.env['HTTP_PROXY'];
+});
+
+afterEach(() => {
+  delete process.env['HTTPS_PROXY'];
+  delete process.env['HTTP_PROXY'];
+});
+
+describe('applySessionProxy — 双通道应用', () => {
+  it('配置代理 → default + agent-browser 分区均设置 proxyRules，undici 走 ProxyAgent', async () => {
+    await applySessionProxy('http://127.0.0.1:7890');
+
+    const expected = { proxyRules: 'http://127.0.0.1:7890' };
+    expect(sessionMocks.defaultSetProxy).toHaveBeenCalledWith(expected);
+    expect(sessionMocks.partitionSetProxy).toHaveBeenCalledWith(expected);
+    expect(undiciMocks.proxyAgentCalls).toEqual(['http://127.0.0.1:7890']);
+    expect(undiciMocks.setGlobalDispatcher).toHaveBeenCalledTimes(1);
+  });
+
+  it('代理地址两侧空白被 trim', async () => {
+    await applySessionProxy('  http://proxy.local:8080  ');
+    expect(sessionMocks.defaultSetProxy).toHaveBeenCalledWith({
+      proxyRules: 'http://proxy.local:8080',
+    });
+  });
+});
+
+describe('applySessionProxy — 环境变量回退链', () => {
+  it('未配置 proxyUrl 时回退 HTTPS_PROXY 环境变量', async () => {
+    process.env['HTTPS_PROXY'] = 'http://env-proxy:3128';
+    await applySessionProxy(null);
+
+    expect(sessionMocks.defaultSetProxy).toHaveBeenCalledWith({
+      proxyRules: 'http://env-proxy:3128',
+    });
+  });
+
+  it('HTTPS_PROXY 缺失时回退 HTTP_PROXY', async () => {
+    process.env['HTTP_PROXY'] = 'http://env-http:3128';
+    await applySessionProxy(undefined);
+
+    expect(sessionMocks.defaultSetProxy).toHaveBeenCalledWith({
+      proxyRules: 'http://env-http:3128',
+    });
+  });
+
+  it('双空 → 显式直连（direct mode + 直连 Agent）', async () => {
+    await applySessionProxy(null);
+
+    expect(sessionMocks.defaultSetProxy).toHaveBeenCalledWith({ mode: 'direct' });
+    expect(undiciMocks.agentCalls).toBe(1); // 直连 Agent
+    expect(undiciMocks.proxyAgentCalls).toHaveLength(0);
+  });
+
+  it('配置空串视为未配置（回退环境变量）', async () => {
+    process.env['HTTPS_PROXY'] = 'http://env-fallback:1';
+    await applySessionProxy('   ');
+    expect(sessionMocks.defaultSetProxy).toHaveBeenCalledWith({
+      proxyRules: 'http://env-fallback:1',
+    });
+  });
+});
+
+describe('applySessionProxy — 失败语义（绝不阻断主流程）', () => {
+  it('Chromium 通道失败 → 仅 WARN，undici 通道照常设置', async () => {
+    sessionMocks.throwOnDefaultSetProxy = true;
+    await expect(applySessionProxy('http://proxy:1')).resolves.toBeUndefined();
+    expect(undiciMocks.proxyAgentCalls).toEqual(['http://proxy:1']);
+  });
+});