fix(inbound): 修复API响应码类型不匹配问题

- 将InboundApiResponse中的code字段从Int类型改为String?类型
- 更新isSuccess方法判断逻辑，由code == 200改为code == "00000"
- 修改错误处理中返回的响应码格式，统一使用字符串"-1"

app/src/main/java/com/sw/inbound/model/response/InboundApiResponse.kt

@@ -7,9 +7,9 @@ import com.google.gson.annotations.SerializedName
  * 与旧 ApiResponse 区别：code 为 Int，200 表示成功
  */
 data class InboundApiResponse<T>(
-    @SerializedName("code") val code: Int = -1,
+    @SerializedName("code") val code: String? = null,
     @SerializedName("msg") val msg: String? = null,
     @SerializedName("data") val data: T? = null
 ) {
-    fun isSuccess(): Boolean = code == 200
+    fun isSuccess(): Boolean = code == "00000"
 }

app/src/main/java/com/sw/inbound/repository/InboundRepository.kt

@@ -67,7 +67,7 @@ class InboundRepository @Inject constructor(
                 is IOException -> "网络IO错误: ${e.message}"
                 else -> "未知错误: ${e.message}"
             }
-            InboundApiResponse(code = -1, msg = msg)
+            InboundApiResponse(code = "-1", msg = msg)
         }
     }
 }