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/BrowserArchitectureDemo.vue

@@ -0,0 +1,130 @@
+<template>
+  <div class="browser-demo">
+    <div class="demo-label">浏览器架构 ── 点击查看各模块</div>
+
+    <div class="browser-schema">
+      <div class="browser-layers">
+        <div
+          v-for="layer in layers"
+          :key="layer.name"
+          class="layer"
+          :class="{ active: activeLayer === layer.name }"
+          @click="activeLayer = activeLayer === layer.name ? '' : layer.name"
+        >
+          <div class="layer-header">
+            <span class="layer-name">{{ layer.name }}</span>
+            <span class="layer-icon">{{ layer.icon }}</span>
+          </div>
+          <div v-if="activeLayer === layer.name" class="layer-detail">
+            <div class="detail-text">{{ layer.desc }}</div>
+            <div class="detail-examples">
+              <span v-for="ex in layer.examples" :key="ex" class="example-tag">{{ ex }}</span>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <div class="tap-hint">👆 点击查看各模块详情</div>
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+const activeLayer = ref('')
+const layers = [
+  { name: '用户界面', icon: '🎨', desc: '你看到的地址栏、标签页、书签等', examples: ['地址栏', '标签页', '书签栏', '工具栏'] },
+  { name: '浏览器引擎', icon: '⚙️', desc: '协调 UI 和渲染引擎的桥梁', examples: ['Chrome: Blink', 'Firefox: Gecko', 'Safari: WebKit'] },
+  { name: '渲染引擎', icon: '📄', desc: '解析 HTML/CSS，把网页显示出来', examples: ['Blink', 'Gecko', 'WebKit'] },
+  { name: 'JavaScript 引擎', icon: '⚡', desc: '执行页面中的 JavaScript 代码', examples: ['V8', 'SpiderMonkey', 'JavaScriptCore'] },
+  { name: '网络模块', icon: '🌐', desc: '发送 HTTP/HTTPS 请求', examples: ['HTTP', 'HTTP/2', 'HTTP/3', 'WebSocket'] },
+  { name: '数据存储', icon: '💾', desc: '保存 Cookie、缓存等数据', examples: ['Cookie', 'LocalStorage', 'Cache'] }
+]
+</script>
+
+<style scoped>
+.browser-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;
+}
+
+.browser-layers {
+  display: flex;
+  flex-direction: column;
+  gap: 0.4rem;
+}
+
+.layer {
+  background: var(--vp-c-bg);
+  border: 1px solid var(--vp-c-divider);
+  border-radius: 6px;
+  padding: 0.5rem 0.7rem;
+  transition: all 0.3s;
+}
+
+.layer.active {
+  border-color: var(--vp-c-brand);
+}
+
+.layer-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.layer-name {
+  font-size: 0.78rem;
+  font-weight: 600;
+  color: var(--vp-c-text-2);
+}
+
+.layer-icon {
+  font-size: 0.9rem;
+}
+
+.layer-detail {
+  margin-top: 0.5rem;
+  padding-top: 0.5rem;
+  border-top: 1px solid var(--vp-c-divider);
+}
+
+.detail-text {
+  font-size: 0.72rem;
+  color: var(--vp-c-text-3);
+  margin-bottom: 0.4rem;
+}
+
+.detail-examples {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.3rem;
+}
+
+.example-tag {
+  font-size: 0.65rem;
+  padding: 0.15rem 0.4rem;
+  background: var(--vp-c-bg-soft);
+  border-radius: 3px;
+  color: var(--vp-c-text-2);
+}
+
+.tap-hint {
+  text-align: center;
+  font-size: 0.72rem;
+  color: var(--vp-c-text-3);
+  margin-top: 0.75rem;
+}
+</style>