refactor: 统一项目名称从OpenFang到ZCLAW

重构所有代码和文档中的项目名称，将OpenFang统一更新为ZCLAW。包括：
- 配置文件中的项目名称
- 代码注释和文档引用
- 环境变量和路径
- 类型定义和接口名称
- 测试用例和模拟数据

同时优化部分代码结构，移除未使用的模块，并更新相关依赖项。

package.json

@@ -1,7 +1,7 @@
 {
   "name": "zclaw",
   "version": "0.1.0",
-  "description": "ZCLAW - OpenFang desktop client with Tauri, Chinese model providers, and Feishu integration",
+  "description": "ZCLAW - AI Agent desktop client with Tauri, Chinese model providers, and Feishu integration",
   "main": "dist/gateway/index.js",
   "scripts": {
     "dev": "tsx watch src/gateway/index.ts",
@@ -10,9 +10,9 @@
     "test": "vitest run",
     "test:e2e": "cd desktop && pnpm test:e2e",
     "validate:config": "npx ts-node scripts/validate-config.ts",
-    "gateway:start": "openfang gateway start",
-    "gateway:status": "openfang gateway status",
-    "gateway:doctor": "openfang doctor",
+    "gateway:start": "zclaw gateway start",
+    "gateway:status": "zclaw gateway status",
+    "gateway:doctor": "zclaw doctor",
     "start": "powershell -ExecutionPolicy Bypass -File ./start-all.ps1",
     "start:dev": "powershell -ExecutionPolicy Bypass -File ./start-all.ps1 -Dev",
     "start:desktop": "powershell -ExecutionPolicy Bypass -File ./start-all.ps1 -DesktopOnly",
@@ -24,7 +24,7 @@
   "keywords": [
     "ai",
     "agent",
-    "openfang",
+    "zclaw",
     "tauri",
     "feishu",
     "chinese-models"