feat: 字母描红页样式开发基本完成

miniprogram/toy/icon/icon.less

@@ -24,9 +24,13 @@
         display: block;
     }
 
-    /* 内层 text 显示 iconfont 字形 */
+    /* 内层 text 承载 ::before 字形，固定 1em 方盒便于与 flex 行内文案垂直对齐 */
     > text {
-        display: inline-block;
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        width: 1em;
+        height: 1em;
         line-height: 1;
         font-style: normal;
     }

miniprogram/toy/icon/icon.ts

@@ -66,10 +66,8 @@ Component({
             const styleSegments = [style];
             if (normalizedSize) {
                 styleSegments.push(`font-size:${normalizedSize}`);
-                if (isImage) {
-                    styleSegments.push(`width:${normalizedSize}`);
-                    styleSegments.push(`height:${normalizedSize}`);
-                }
+                styleSegments.push(`width:${normalizedSize}`);
+                styleSegments.push(`height:${normalizedSize}`);
             }
             if (color && !isImage) {
                 styleSegments.push(`color:${color}`);