init: 初始化 web_hgdjb_server 项目

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

pub/common/utils/page.go

@@ -0,0 +1,19 @@
+package utils
+
+func GetPageRange(totalLen, pageNum, pageSize int) (start, end int) {
+	if pageNum < 1 {
+		pageNum = 1
+	}
+	if pageSize < 1 {
+		pageSize = 10
+	}
+	start = (pageNum - 1) * pageSize
+	if start > totalLen {
+		start = totalLen
+	}
+	end = start + pageSize
+	if end > totalLen {
+		end = totalLen
+	}
+	return
+}