feat: 工具层及 mcp 大重构 (#252)

* feat: 第一版大重构

* fix: 修复类型问题

* chore: 更新版本到 1.3.2

* Add brave as alternative WebSearchTool

* fix: 修正顺序

* fix: 修复对穷鬼模式的 auto dream 和 session memory 越过

* feat: 穷鬼模式去除 session-summary

* feat: 创建 builtin-tools 包，搬运所有工具实现

将 src/tools/ 下的全部 60 个工具目录迁移至 packages/builtin-tools/src/tools/，
内部导入路径已更新为 src/ alias 模式。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: 更新 src/ 中所有工具引用至 builtin-tools 包，删除 src/tools/

- src/tools.ts 及 178 个 src/ 文件的 import 路径从 ./tools/ 改为 builtin-tools/tools/
- 删除 src/tools/ 整个目录（已迁移至 packages/builtin-tools/）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: 添加 builtin-tools 路径别名至 tsconfig，更新 bun.lock

- tsconfig.json 新增 builtin-tools/* 和 builtin-tools 路径映射
- 新增 packages/builtin-tools/src 至 include

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: 为 builtin-tools、mcp-client、agent-tools 添加 @claude-code-best 作用域前缀

所有包名及 import 路径统一添加 @claude-code-best/ 前缀：
- builtin-tools → @claude-code-best/builtin-tools
- mcp-client → @claude-code-best/mcp-client
- agent-tools → @claude-code-best/agent-tools

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: 修复 node 环境没有 bun 的问题

---------

Co-authored-by: Eric-Guo <eric.guocz@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/builtin-tools/src/tools/WebBrowserTool/WebBrowserPanel.ts

@@ -0,0 +1,3 @@
+// Auto-generated stub — replace with real implementation
+export {};
+export const WebBrowserPanel: (props: Record<string, unknown>) => null = () => null;

packages/builtin-tools/src/tools/WebBrowserTool/WebBrowserTool.ts

@@ -0,0 +1,97 @@
+import { z } from 'zod/v4'
+import type { ToolResultBlockParam } from 'src/Tool.js'
+import { buildTool } from 'src/Tool.js'
+import { lazySchema } from 'src/utils/lazySchema.js'
+
+const WEB_BROWSER_TOOL_NAME = 'WebBrowser'
+
+const inputSchema = lazySchema(() =>
+  z.strictObject({
+    url: z
+      .string()
+      .describe('URL to navigate to in the browser.'),
+    action: z
+      .enum(['navigate', 'screenshot', 'click', 'type', 'scroll'])
+      .optional()
+      .describe('Browser action to perform. Defaults to "navigate".'),
+    selector: z
+      .string()
+      .optional()
+      .describe('CSS selector for click/type actions.'),
+    text: z
+      .string()
+      .optional()
+      .describe('Text to type when action is "type".'),
+  }),
+)
+type InputSchema = ReturnType<typeof inputSchema>
+type BrowserInput = z.infer<InputSchema>
+
+type BrowserOutput = {
+  title: string
+  url: string
+  content?: string
+  screenshot?: string
+}
+
+export const WebBrowserTool = buildTool({
+  name: WEB_BROWSER_TOOL_NAME,
+  searchHint: 'web browser navigate url page screenshot click',
+  maxResultSizeChars: 100_000,
+  strict: true,
+
+  get inputSchema(): InputSchema {
+    return inputSchema()
+  },
+
+  async description() {
+    return 'Browse the web using an embedded browser'
+  },
+  async prompt() {
+    return `Open and interact with web pages in an embedded browser. Supports navigation, screenshots, clicking, typing, and scrolling.
+
+Use this for:
+- Viewing web pages and their content
+- Taking screenshots of UI
+- Interacting with web applications
+- Testing web endpoints with full browser rendering`
+  },
+
+  isConcurrencySafe() {
+    return false
+  },
+  isReadOnly() {
+    return true
+  },
+
+  userFacingName() {
+    return 'Browser'
+  },
+
+  renderToolUseMessage(input: Partial<BrowserInput>) {
+    const action = input.action ?? 'navigate'
+    return `Browser ${action}: ${input.url ?? '...'}`
+  },
+
+  mapToolResultToToolResultBlockParam(
+    content: BrowserOutput,
+    toolUseID: string,
+  ): ToolResultBlockParam {
+    return {
+      tool_use_id: toolUseID,
+      type: 'tool_result',
+      content: `${content.title} (${content.url})\n${content.content ?? ''}`,
+    }
+  },
+
+  async call(input: BrowserInput) {
+    // Browser integration requires the WEB_BROWSER_TOOL runtime (Bun WebView).
+    return {
+      data: {
+        title: '',
+        url: input.url,
+        content: 'Web browser requires the WEB_BROWSER_TOOL runtime.',
+      },
+    }
+  },
+})