feat: 添加多个附录交互式组件和文档更新

- 添加浏览器前端组件：无障碍访问、国际化、实时通信
- 添加 Transformer 注意力机制系列组件
- 更新 Canvas、数据追踪等现有组件
- 修复 ESLint 变量名冲突问题
- 完善相关附录文档

docs/.vitepress/theme/components/appendix/transformer-attention/QKVMechanismDemo.vue

@@ -0,0 +1,41 @@
+<template>
+  <div class="demo-card">
+    <div class="qkv-grid">
+      <div class="qkv-item query">
+        <div class="icon">🔍</div>
+        <div class="name">Query</div>
+        <div class="desc">我想找什么</div>
+      </div>
+      <div class="qkv-item key">
+        <div class="icon">🔑</div>
+        <div class="name">Key</div>
+        <div class="desc">我是什么</div>
+      </div>
+      <div class="qkv-item value">
+        <div class="icon">💎</div>
+        <div class="name">Value</div>
+        <div class="desc">我的内容</div>
+      </div>
+    </div>
+    <div class="formula">
+      Attention(Q, K, V) = softmax(QK<sup>T</sup> / √d<sub>k</sub>) V
+    </div>
+  </div>
+</template>
+
+<script setup>
+</script>
+
+<style scoped>
+.demo-card { border: 1px solid var(--vp-c-divider); border-radius: 8px; background: var(--vp-c-bg-soft); padding: 1rem; margin: 1rem 0; }
+.qkv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; margin-bottom: 0.8rem; }
+@media (max-width: 560px) { .qkv-grid { grid-template-columns: 1fr; } }
+.qkv-item { background: var(--vp-c-bg); border: 2px solid; border-radius: 6px; padding: 0.7rem; text-align: center; }
+.qkv-item.query { border-color: #3b82f6; }
+.qkv-item.key { border-color: #059669; }
+.qkv-item.value { border-color: #7c3aed; }
+.icon { font-size: 1.5rem; margin-bottom: 0.3rem; }
+.name { font-size: 0.8rem; font-weight: bold; color: var(--vp-c-text-1); margin-bottom: 0.2rem; }
+.desc { font-size: 0.7rem; color: var(--vp-c-text-2); }
+.formula { background: var(--vp-c-bg); border: 1px dashed var(--vp-c-brand); border-radius: 4px; padding: 0.6rem; text-align: center; font-size: 0.85rem; font-family: 'Courier New', monospace; color: var(--vp-c-brand); font-weight: bold; }
+</style>