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/BootProcessDemo.vue

@@ -0,0 +1,137 @@
+<template>
+  <div class="boot-demo">
+    <div class="demo-label">操作系统启动流程 ── 点击逐步启动</div>
+
+    <div class="timeline">
+      <div
+        v-for="(step, index) in steps"
+        :key="step.name"
+        class="timeline-item"
+        :class="{ active: currentStep >= index }"
+        @click="currentStep = index"
+      >
+        <div class="timeline-marker">
+          <span class="marker-dot" :class="{ filled: currentStep >= index }">{{ index + 1 }}</span>
+          <span v-if="index < steps.length - 1" class="marker-line" :class="{ filled: currentStep >= index }"></span>
+        </div>
+        <div class="timeline-content">
+          <div class="step-name">{{ step.name }}</div>
+          <div class="step-desc">{{ step.desc }}</div>
+        </div>
+      </div>
+    </div>
+
+    <div class="tap-hint">👆 点击查看各步骤</div>
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+const currentStep = ref(0)
+const steps = [
+  { name: '引导程序', desc: '从硬盘读取 bootloader' },
+  { name: '内核加载', desc: '加载操作系统内核' },
+  { name: '系统服务', desc: '启动各种后台服务' },
+  { name: '桌面环境', desc: '显示登录界面和桌面' }
+]
+</script>
+
+<style scoped>
+.boot-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;
+}
+
+.timeline {
+  display: flex;
+  flex-direction: column;
+}
+
+.timeline-item {
+  display: flex;
+  gap: 0.6rem;
+  padding: 0.3rem 0;
+  opacity: 0.4;
+  transition: opacity 0.3s;
+}
+
+.timeline-item.active {
+  opacity: 1;
+}
+
+.timeline-marker {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  width: 1.5rem;
+}
+
+.marker-dot {
+  width: 1.5rem;
+  height: 1.5rem;
+  border-radius: 50%;
+  background: var(--vp-c-bg);
+  border: 2px solid var(--vp-c-divider);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 0.7rem;
+  font-weight: 600;
+  color: var(--vp-c-text-3);
+  transition: all 0.3s;
+}
+
+.marker-dot.filled {
+  background: var(--vp-c-brand);
+  border-color: var(--vp-c-brand);
+  color: white;
+}
+
+.marker-line {
+  flex: 1;
+  width: 2px;
+  background: var(--vp-c-divider);
+  min-height: 1.5rem;
+}
+
+.marker-line.filled {
+  background: var(--vp-c-brand);
+}
+
+.timeline-content {
+  flex: 1;
+  padding-bottom: 0.8rem;
+}
+
+.step-name {
+  font-size: 0.78rem;
+  font-weight: 600;
+  color: var(--vp-c-text-2);
+}
+
+.step-desc {
+  font-size: 0.7rem;
+  color: var(--vp-c-text-3);
+  margin-top: 0.15rem;
+}
+
+.tap-hint {
+  text-align: center;
+  font-size: 0.72rem;
+  color: var(--vp-c-text-3);
+  margin-top: 0.5rem;
+}
+</style>