refactor(alpine): restructure components and remove unused utilities for better modularity and maintainability

src/styles/typed-text.scss

@@ -1,10 +1,23 @@
 /* 光标样式 */
 .typed-text::after {
-  content: '|';
+  content: none;
+}
+
+.typed-text.typed-text--typing::after {
+  content: "";
   display: inline-block;
-  opacity: 0;
+  width: 0.16em;
+  height: 0.78em;
+  margin-left: 0.08em;
+  background: var(--devcm-amber);
+  box-shadow: 0 0 8px rgba(255, 176, 0, 0.34);
+  opacity: 0.82;
   animation: blink 0.7s infinite alternate; /* 闪烁动画 */
-  vertical-align: text-bottom;
+  vertical-align: 0.04em;
+}
+
+.typed-text.typed-text--complete::after {
+  content: none;
 }
 
 /* 闪烁动画 */
@@ -12,4 +25,4 @@
   to {
     opacity: 1;
   }
-}
+}