feat(appendix): 添加多个交互式演示组件，完善 AI/Infra 等章节内容

- 新增 Vibe Coding 全栈相关演示组件 (DeveloperSkillShift, FrontendTriad, BackendCore 等)
- 新增 RAG 相关组件 (RAGPipeline, ChunkingStrategy, Retrieval 等)
- 新增 Embedding & Vector 相关组件 (EmbeddingConcept, VectorSimilarity 等)
- 新增 AI Native App 设计组件 (AINativeArch, PromptDesign 等)
- 新增 Infrastructure as Code 组件 (IaCConcept, TerraformWorkflow 等)
- 新增 DNS & HTTPS 演示组件 (DnsResolution, HttpsHandshake 等)
- 新增 Model Finetuning 组件 (FinetuningPipeline 等)
- 更新多个章节的 markdown 内容，集成交互式演示

docs/.vitepress/theme/components/appendix/computer-fundamentals/BIOSPostDemo.vue

@@ -0,0 +1,139 @@
+<template>
+  <div class="bios-post-demo">
+    <div class="demo-label">BIOS POST 硬件自检 ── 点击查看检测项目</div>
+
+    <div class="post-items">
+      <div
+        v-for="item in postItems"
+        :key="item.name"
+        class="post-item"
+        :class="{ passed: item.passed, error: item.error }"
+        @click="item.passed = !item.passed"
+      >
+        <div class="item-status">{{ item.passed ? '✅' : item.error ? '❌' : '⏳' }}</div>
+        <div class="item-info">
+          <div class="item-name">{{ item.name }}</div>
+          <div class="item-desc">{{ item.desc }}</div>
+        </div>
+      </div>
+    </div>
+
+    <div class="post-result">
+      <span v-if="allPassed" class="result-pass">✅ 自检通过，准备启动</span>
+      <span v-else class="result-pending">⏳ 点击项目模拟检测状态</span>
+    </div>
+
+    <div class="tap-hint">👆 点击模拟检测结果</div>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed } from 'vue'
+
+const postItems = ref([
+  { name: 'CPU', desc: '处理器完整性检测', passed: false, error: false },
+  { name: '内存', desc: 'RAM 容量和可用性检测', passed: false, error: false },
+  { name: '显卡', desc: '显示适配器初始化', passed: false, error: false },
+  { name: '硬盘', desc: '存储设备识别', passed: false, error: false },
+  { name: '键盘', desc: '键盘接口检测', passed: false, error: false },
+  { name: '鼠标', desc: '鼠标接口检测', passed: false, error: false }
+])
+
+const allPassed = computed(() => postItems.value.every(item => item.passed))
+</script>
+
+<style scoped>
+.bios-post-demo {
+  border: 1px solid var(--vp-c-divider);
+  border-radius: 8px;
+  background: var(--vp-c-bg-soft);
+  padding: 1rem 1.2rem;
+  margin: 1rem 0;
+  cursor: pointer;
+  user-select: none;
+}
+
+.demo-label {
+  font-size: 0.78rem;
+  font-weight: bold;
+  color: var(--vp-c-text-2);
+  margin-bottom: 0.75rem;
+  letter-spacing: 0.2px;
+}
+
+.post-items {
+  display: grid;
+  grid-template-columns: repeat(2, 1fr);
+  gap: 0.4rem;
+}
+
+.post-item {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.5rem;
+  background: var(--vp-c-bg);
+  border: 1px solid var(--vp-c-divider);
+  border-radius: 6px;
+  transition: all 0.3s;
+}
+
+.post-item.passed {
+  border-color: #22c55e;
+  background: rgba(34, 197, 94, 0.1);
+}
+
+.post-item.error {
+  border-color: #ef4444;
+  background: rgba(239, 68, 68, 0.1);
+}
+
+.item-status {
+  font-size: 1rem;
+  flex-shrink: 0;
+}
+
+.item-info {
+  flex: 1;
+  min-width: 0;
+}
+
+.item-name {
+  font-size: 0.72rem;
+  font-weight: 600;
+  color: var(--vp-c-text-2);
+}
+
+.item-desc {
+  font-size: 0.62rem;
+  color: var(--vp-c-text-3);
+  margin-top: 0.1rem;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.post-result {
+  margin-top: 0.75rem;
+  text-align: center;
+  padding: 0.4rem;
+  border-radius: 4px;
+  font-size: 0.75rem;
+}
+
+.result-pass {
+  color: #22c55e;
+  font-weight: 600;
+}
+
+.result-pending {
+  color: var(--vp-c-text-3);
+}
+
+.tap-hint {
+  text-align: center;
+  font-size: 0.72rem;
+  color: var(--vp-c-text-3);
+  margin-top: 0.5rem;
+}
+</style>