更新预算归档功能，添加归档总结和更新归档总结接口，优化预算统计逻辑，调整相关样式

Web/src/styles/rich-content.css

@@ -71,8 +71,9 @@
 .rich-html-content thead,
 .rich-html-content tbody {
   display: table;
-  min-width: 100%;
+  width: 100%;
   table-layout: fixed; /* 核心：强制列宽分配逻辑一致 */
+  border-collapse: collapse;
 }
 
 .rich-html-content tr {
@@ -86,10 +87,11 @@
   text-align: left;
   border: none;
   border-bottom: 1px solid var(--van-border-color-light);
-  font-size: 12px;
+  font-size: 11px;
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
+  box-sizing: border-box;
 }
 
 .rich-html-content th {