refactor: replace rounded utility classes and clean up unused scss files

Removed unused text-align.scss, position.scss, and rounded.scss utility files along with their imports from scss/index.scss. Updated all existing uses of the rounded-* utility classes in vue components to use inline border-radius syntax like rounded-[10px] instead.

src/static/scss/index.scss

@@ -7,10 +7,7 @@
 @import "./margin.scss";
 @import "./font-size.scss";
 @import "./font-family.scss";
-@import "./text-align.scss";
-@import "./rounded.scss";
 @import "./ellipsis.scss";
-@import "./position.scss";
 @import "./overflow.scss";
 @import "./scroll.scss";
 @import "./width.scss";

src/static/scss/position.scss

@@ -1,24 +0,0 @@
-// 定位
-.relative {
-  position: relative;
-}
-
-.absolute {
-  position: absolute;
-}
-
-.left-0 {
-  left: 0;
-}
-
-.right-0 {
-  right: 0;
-}
-
-.bottom-0 {
-  bottom: 0;
-}
-
-.top-0 {
-  top: 0;
-}

src/static/scss/rounded.scss

@@ -1,52 +0,0 @@
-// 圆角
-.rounded-4 {
-  border-radius: 4px;
-}
-
-.rounded-5 {
-  border-radius: 5px;
-}
-
-.rounded-6 {
-  border-radius: 6px;
-}
-
-.rounded-8 {
-  border-radius: 8px;
-}
-
-.rounded-10 {
-  border-radius: 10px;
-}
-
-.rounded-12 {
-  border-radius: 12px;
-}
-
-.rounded-14 {
-  border-radius: 14px;
-}
-
-.rounded-16 {
-  border-radius: 16px;
-}
-
-.rounded-18 {
-  border-radius: 18px;
-}
-
-.rounded-20 {
-  border-radius: 20px;
-}
-
-.rounded-24 {
-  border-radius: 24px;
-}
-
-.rounded-50 {
-  border-radius: 50px;
-}
-
-.rounded-full {
-  border-radius: 50%;
-}

src/static/scss/text-align.scss

@@ -1,12 +0,0 @@
-// 文本-align
-.text-center {
-  text-align: center;
-}
-
-.text-left {
-  text-align: left;
-}
-
-.text-right {
-  text-align: right;
-}