feat: 添加思维导图支持，更新引导步骤组件，优化视频播放与学习进度追踪功能

src/views/skill/components/SkillTree.vue

@@ -338,13 +338,19 @@ const getSubTagPosition = (subTagIndex: number, totalSubTags: number) => {
         style="
           background: radial-gradient(
             circle at center,
-            rgba(0, 0, 0, 0.5) 0%,
-            rgba(0, 0, 0, 0.4) 20%,
-            rgba(0, 0, 0, 0.3) 40%,
+            rgba(46, 141, 218, 0.8) 0%,
+            rgba(46, 141, 218, 0.4) 30%,
+            rgba(46, 141, 218, 0.3) 60%,
             transparent 70%
           );
         "
       ></div>
+      <!-- <img
+        :src="getStaticImage('skill/树蒙版.png')"
+        alt=""
+        class="absolute w-full h-full inset-0 z-20"
+        v-if="props.selectedTagId"
+      /> -->
     </transition>
 
     <!-- 右侧标签 -->