fix: UnbindInterceptor 改用 peekBody 防止消费响应体

source.request() 在空body/非JSON响应时会导致后续Gson解析失败。
改用 peekBody(1024) 安全读取副本。

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/xiaoqu/watch/network/UnbindInterceptor.kt

@@ -14,6 +14,7 @@ import javax.inject.Singleton
 /**
  * 解绑拦截器
  * 检测 API 返回 code=104 时，自动清除用户数据并发送解绑事件
+ * 使用 peekBody 安全读取响应体，不影响后续解析
  */
 @Singleton
 class UnbindInterceptor @Inject constructor(
@@ -25,23 +26,25 @@ class UnbindInterceptor @Inject constructor(
     override fun intercept(chain: Interceptor.Chain): Response {
         val response = chain.proceed(chain.request())
 
+        // 只处理成功的 HTTP 响应
         if (response.isSuccessful) {
             try {
-                // 窥视响应体（不消耗）
-                val source = response.body?.source() ?: return response
-                source.request(Long.MAX_VALUE)
-                val buffer = source.buffer.clone()
-                val json = buffer.readUtf8()
+                // peekBody 安全读取副本，不消耗原始 body
+                val peekBody = response.peekBody(1024)
+                val json = peekBody.string()
 
-                val apiResponse = gson.fromJson(json, ApiResponse::class.java)
-                if (apiResponse?.isUnbound == true) {
-                    Timber.w("收到 code=104，执行自动解绑")
-                    userPrefs.clear()
-                    runBlocking {
-                        eventBus.emit(AppEvent.DeviceUnbound)
+                if (json.isNotEmpty()) {
+                    val apiResponse = gson.fromJson(json, ApiResponse::class.java)
+                    if (apiResponse?.isUnbound == true) {
+                        Timber.w("收到 code=104，执行自动解绑")
+                        userPrefs.clear()
+                        runBlocking {
+                            eventBus.emit(AppEvent.DeviceUnbound)
+                        }
                     }
                 }
             } catch (e: Exception) {
+                // 解析异常不影响正常请求
                 Timber.w(e, "解绑检测异常")
             }
         }