对接日志默认仅记录告警与错误

新增 LOG_INTEGRATION_LEVEL（默认 warn），压低 integration-*.log 体积；
失败类文案自动提升为 error，避免异常被过滤。

apps/backend/src/utils/logger.test.ts

@@ -26,6 +26,13 @@ test('shouldWriteLog respects configured minimum log level', () => {
   assert.equal(shouldWriteLog('error', 'warn'), true)
 })
 
+test('shouldWriteLog at warn filters info-style integration noise', () => {
+  // 与默认 LOG_INTEGRATION_LEVEL=warn 行为一致
+  assert.equal(shouldWriteLog('info', 'warn'), false)
+  assert.equal(shouldWriteLog('warn', 'warn'), true)
+  assert.equal(shouldWriteLog('error', 'warn'), true)
+})
+
 test('resolveLogFilePath uses daily log file names by channel', () => {
   assert.match(resolveLogFilePath('app', '2026-05-28T00:00:19.194+08:00'), /app-2026-05-28\.log$/)
   assert.match(

apps/backend/src/utils/logger.ts

@@ -50,6 +50,10 @@ const ANSI = {
 const DATA_ROOT = resolveDataRoot()
 const LOG_DIR = path.join(DATA_ROOT, 'logs')
 const ACTIVE_LOG_LEVEL = normalizeLogLevel(runtimeConfig.logging?.level)
+/** integration 通道独立阈值，默认 warn（仅错误/告警落盘） */
+const ACTIVE_INTEGRATION_LOG_LEVEL = normalizeLogLevel(
+  runtimeConfig.logging?.integrationLevel ?? 'warn',
+)
 const DEFAULT_LOG_RETENTION_DAYS = 30
 const LOG_RETENTION_DAYS = normalizeLogRetentionDays(runtimeConfig.logging?.retentionDays)
 const LEGACY_LOG_FILES = new Set(['app.log', 'integration.log'])
@@ -90,7 +94,24 @@ export function logIntegration(
   detail: LogDetail = undefined,
   { level = 'info' }: { level?: LogLevel } = {},
 ) {
-  return writeLog(level, scope, message, detail, { channel: 'integration' })
+  // 默认 integration 阈值为 warn：失败类文案即使调用方传 info 也提升，避免漏记异常
+  return writeLog(resolveIntegrationLogLevel(level, message), scope, message, detail, {
+    channel: 'integration',
+  })
+}
+
+function resolveIntegrationLogLevel(level: LogLevel, message: unknown): LogLevel {
+  const normalized = normalizeLogLevel(level)
+  if (normalized === 'warn' || normalized === 'error') {
+    return normalized
+  }
+
+  const text = String(message || '')
+  if (/失败|异常|错误|超时|拒绝|expired|fail|error|timeout|denied/i.test(text)) {
+    return 'error'
+  }
+
+  return normalized
 }
 
 export function logExternalHttpPacket(
@@ -109,7 +130,9 @@ function writeLog(
   detail: LogDetail,
   { channel = 'app' }: { channel?: LogChannel } = {},
 ): LogEntry | null {
-  if (!shouldWriteLog(level, ACTIVE_LOG_LEVEL)) {
+  const configuredLevel =
+    channel === 'integration' ? ACTIVE_INTEGRATION_LOG_LEVEL : ACTIVE_LOG_LEVEL
+  if (!shouldWriteLog(level, configuredLevel)) {
     return null
   }