fix(hooks): pre-push 无 upstream 时回退到 origin/main 对比

.husky/pre-push

@@ -3,7 +3,9 @@
 npx tsc --noEmit
 
 # ESLint 严格检查（仅检查本次推送的变更文件，不阻塞不相关的旧代码）
-CHANGED_FILES=$(git diff --name-only --diff-filter=d @{upstream}...HEAD -- '*.ts' '*.tsx' '*.js' '*.jsx' '*.mjs')
+# 新分支无 upstream 时，回退到与 origin/main 对比
+BASE=$(git rev-parse --verify @{upstream} 2>/dev/null && echo "@{upstream}" || echo "origin/main")
+CHANGED_FILES=$(git diff --name-only --diff-filter=d "$BASE"...HEAD -- '*.ts' '*.tsx' '*.js' '*.jsx' '*.mjs')
 if [ -n "$CHANGED_FILES" ]; then
   echo "$CHANGED_FILES" | xargs npx eslint --max-warnings=0
 fi