fix: 流式连接中断（cancelled）时自动重试，避免调用技能时停止工作

Author: xiaomostation

app/src/main/java/com/xiaomo/androidforclaw/agent/context/ContextErrors.kt

@@ -126,8 +126,19 @@ object ContextErrors {
     fun isTransientHttpError(errorMessage: String?): Boolean {
         if (errorMessage.isNullOrBlank()) return false
         val trimmed = errorMessage.trim()
-        val status = extractLeadingHttpStatus(trimmed) ?: return false
-        return status in TRANSIENT_HTTP_ERROR_CODES
+        // HTTP status code check
+        val status = extractLeadingHttpStatus(trimmed)
+        if (status != null && status in TRANSIENT_HTTP_ERROR_CODES) return true
+        // Connection-level errors: cancelled streams, reset connections, broken pipes
+        val lower = trimmed.lowercase()
+        return lower.contains("cancelled") ||
+            lower.contains("connection reset") ||
+            lower.contains("broken pipe") ||
+            lower.contains("connection was closed") ||
+            lower.contains("unexpected end of stream") ||
+            lower.contains("stream was reset") ||
+            lower.contains("socket closed") ||
+            lower.contains("canceled") // OkHttp American spelling
     }
 
     /**