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。

desktop/src/lib/llm-service.ts

@@ -9,7 +9,7 @@
  * Supports multiple backends:
  * - OpenAI (GPT-4, GPT-3.5)
  * - Volcengine (Doubao)
- * - OpenFang Gateway (passthrough)
+ * - ZCLAW Gateway (passthrough)
  *
  * Part of ZCLAW L4 Self-Evolution capability.
  */
@@ -284,7 +284,7 @@ class VolcengineLLMAdapter implements LLMServiceAdapter {
   }
 }
 
-// === Gateway Adapter (pass through to OpenFang or internal Kernel) ===
+// === Gateway Adapter (pass through to ZCLAW or internal Kernel) ===
 
 class GatewayLLMAdapter implements LLMServiceAdapter {
   private config: LLMConfig;
@@ -346,7 +346,7 @@ class GatewayLLMAdapter implements LLMServiceAdapter {
       }
     }
 
-    // External Gateway mode: Use OpenFang's chat endpoint
+    // External Gateway mode: Use ZCLAW's chat endpoint
     const agentId = localStorage.getItem('zclaw-default-agent-id') || 'default';
 
     const response = await fetch(`/api/agents/${agentId}/message`, {
@@ -403,7 +403,7 @@ class GatewayLLMAdapter implements LLMServiceAdapter {
   }
 
   isAvailable(): boolean {
-    // Gateway is available if we're in browser (can connect to OpenFang)
+    // Gateway is available if we're in browser (can connect to ZCLAW)
     return typeof window !== 'undefined';
   }
 
@@ -460,7 +460,7 @@ export function loadConfig(): LLMConfig {
     // Ignore parse errors
   }
 
-  // Default to gateway (OpenFang passthrough) for L4 self-evolution
+  // Default to gateway (ZCLAW passthrough) for L4 self-evolution
   return DEFAULT_CONFIGS.gateway;
 }