refactor: replace custom ellipsis classes with native utilities

delete unused ellipsis.scss partial and its import, update all components to use truncate and line-clamp-2 utilities

src/static/scss/ellipsis.scss

@@ -1,20 +0,0 @@
-// 省略号
-.ellipsis-1 {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.ellipsis-2 {
-  display: -webkit-box;
-  -webkit-box-orient: vertical;
-  -webkit-line-clamp: 2;
-  overflow: hidden;
-}
-
-.ellipsis-3 {
-  display: -webkit-box;
-  -webkit-box-orient: vertical;
-  -webkit-line-clamp: 3;
-  overflow: hidden;
-}

src/static/scss/index.scss

@@ -3,7 +3,6 @@
 @import "./flex.scss";
 @import "./height.scss";
 @import "./font-family.scss";
-@import "./ellipsis.scss";
 @import "./overflow.scss";
 @import "./scroll.scss";
 @import "./width.scss";