fix: 修复 ESLint curly 规则问题

- 在 if 语句后添加必需的大括号
- 修复 unifiedClaudeScheduler.js (1处)
- 修复 unstableUpstreamHelper.js (2处)

src/utils/unstableUpstreamHelper.js

@@ -1,7 +1,9 @@
 const logger = require('./logger')
 
 function parseList(envValue) {
-  if (!envValue) return []
+  if (!envValue) {
+    return []
+  }
   return envValue
     .split(',')
     .map((s) => s.trim().toLowerCase())
@@ -13,7 +15,9 @@ const unstableKeywords = parseList(process.env.UNSTABLE_ERROR_KEYWORDS)
 const unstableStatusCodes = new Set([408, 499, 502, 503, 504, 522])
 
 function normalizeErrorPayload(payload) {
-  if (!payload) return {}
+  if (!payload) {
+    return {}
+  }
 
   if (typeof payload === 'string') {
     try {