refactor: replace custom line-height classes with tailwind leading utils

Remove the deprecated src/static/scss/line-height.scss custom utility file, and update all component template instances of line-height-* classes to use the equivalent tailwind leading-[xxpx] utilities. This standardizes line height styling across the codebase by using native tailwind classes instead of custom SCSS helpers.

src/static/scss/index.scss

@@ -5,7 +5,6 @@
 @import "./flex.scss";
 @import "./font-weight.scss";
 @import "./height.scss";
-@import "./line-height.scss";
 @import "./margin.scss";
 @import "./font-size.scss";
 @import "./font-family.scss";

src/static/scss/line-height.scss

@@ -1,36 +0,0 @@
-// 行高
-.line-height-16 {
-  line-height: 16px;
-}
-
-.line-height-17 {
-  line-height: 17px;
-}
-
-.line-height-18 {
-  line-height: 18px;
-}
-
-.line-height-20 {
-  line-height: 20px;
-}
-
-.line-height-21 {
-  line-height: 21px;
-}
-
-.line-height-22 {
-  line-height: 22px;
-}
-
-.line-height-24 {
-  line-height: 24px;
-}
-
-.line-height-30 {
-  line-height: 30px;
-}
-
-.line-height-32 {
-  line-height: 32px;
-}