feat(docs): enhance interactive demos and improve documentation

- Add new interactive components for frontend routing, browser rendering pipeline, and database transactions
- Improve existing demos with better visuals, explanations, and examples
- Update documentation structure and content for better clarity
- Add new utility scripts and update package.json with new commands
- Fix formatting and alignment in documentation tables

docs/.vitepress/theme/components/appendix/database-intro/RelationalDataDemo.vue

@@ -71,21 +71,31 @@ const setHover = (id) => {
 
 <template>
   <div class="relational-demo">
+    <div class="demo-header">
+      <span class="icon">📊</span>
+      <span class="title">关系型数据演示</span>
+      <span class="subtitle">Excel 模式 vs 数据库模式</span>
+    </div>
+
+    <div class="intro-text">
+      想象你在管理一个<span class="highlight">书店订单</span>。用 Excel 时，每个订单都重复写顾客信息；用关系型数据库时，顾客信息单独存一张表，订单表只存顾客 ID。就像把<span class="highlight">通讯录和订单分开</span>，而不是每笔订单都抄一遍地址。
+    </div>
+
     <div class="tabs">
-      <div
+      <button
         class="tab"
         :class="{ active: activeTab === 'excel' }"
         @click="activeTab = 'excel'"
       >
-        Excel 模式 (单表)
-      </div>
-      <div
+        📋 Excel 模式 (单表)
+      </button>
+      <button
         class="tab"
         :class="{ active: activeTab === 'db' }"
         @click="activeTab = 'db'"
       >
-        数据库模式 (多表关联)
-      </div>
+        🗄️ 数据库模式 (多表关联)
+      </button>
     </div>
 
     <div class="content-area">
@@ -117,7 +127,7 @@ const setHover = (id) => {
         </div>
         <div class="note error">
           <p>❌ <strong>问题：</strong> "张三"的信息重复存储了 3 次。</p>
-          <p>如果张三换了电话，你需要修改 3 行数据，很容易漏改！</p>
+          <p>如果张三换了电话，你需要修改 3 行数据，很容易漏改！这叫<span class="highlight">数据冗余</span>。</p>
         </div>
       </div>
 
@@ -126,7 +136,7 @@ const setHover = (id) => {
         <div class="db-layout">
           <!-- Users Table -->
           <div class="db-table users-table">
-            <div class="table-title">用户表 (Users)</div>
+            <div class="table-title">👥 用户表 (Users)</div>
             <table>
               <thead>
                 <tr>
@@ -143,7 +153,7 @@ const setHover = (id) => {
                   @mouseenter="setHover(u.id)"
                   @mouseleave="setHover(null)"
                 >
-                  <td>{{ u.id }}</td>
+                  <td class="primary-key">{{ u.id }}</td>
                   <td>{{ u.name }}</td>
                   <td>{{ u.phone }}</td>
                 </tr>
@@ -153,12 +163,13 @@ const setHover = (id) => {
 
           <!-- Connection Lines (Visual only, simplified) -->
           <div class="connector">
-            <div class="arrow">⬅️ 关联 (Join) ➡️</div>
+            <div class="arrow-label">🔗 外键关联</div>
+            <div class="arrow">⬅️ Join ➡️</div>
           </div>
 
           <!-- Orders Table -->
           <div class="db-table orders-table">
-            <div class="table-title">订单表 (Orders)</div>
+            <div class="table-title">📦 订单表 (Orders)</div>
             <table>
               <thead>
                 <tr>
@@ -179,134 +190,239 @@ const setHover = (id) => {
                   <td>{{ o.id }}</td>
                   <td>{{ o.book }}</td>
                   <td>{{ o.price }}</td>
-                  <td class="highlight-cell">{{ o.user_id }}</td>
+                  <td class="highlight-cell foreign-key">{{ o.user_id }}</td>
                 </tr>
               </tbody>
             </table>
           </div>
         </div>
         <div class="note success">
-          <p>✅ <strong>优势：</strong> 订单表只存 "用户 ID"。</p>
+          <p>✅ <strong>优势：</strong> 订单表只存 "用户 ID"，不重复存用户信息。</p>
           <p>
-            鼠标悬停在某一行，看看它们是如何自动关联的。修改用户表一次，所有订单都会自动更新！
+            鼠标悬停在用户表或订单表的某一行，看看它们是如何通过 <span class="highlight">外键自动关联</span>的。修改用户表一次，所有订单都会自动更新！
           </p>
         </div>
       </div>
     </div>
+
+    <div class="info-box">
+      <span class="icon">💡</span>
+      <strong>核心思想：</strong>关系型数据库通过<span class="highlight">拆表 + 外键</span>消除冗余。就像把通讯录和记账本分开，记账本只写"姓名"，查账时再去通讯录找详细信息。这样改一次电话，所有记录都更新。
+    </div>
   </div>
 </template>
 
 <style scoped>
 .relational-demo {
-  border: 1px solid #e4e7ed;
+  border: 1px solid var(--vp-c-divider);
   border-radius: 8px;
-  background: #fff;
-  overflow: hidden;
-  margin: 20px 0;
-  font-family: sans-serif;
+  background: var(--vp-c-bg-soft);
+  padding: 1rem;
+  margin: 1rem 0;
 }
+
+.demo-header {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  margin-bottom: 0.75rem;
+}
+
+.demo-header .icon { font-size: 1.25rem; }
+.demo-header .title { font-weight: bold; font-size: 1rem; }
+.demo-header .subtitle { color: var(--vp-c-text-2); font-size: 0.85rem; margin-left: 0.5rem; }
+
+.intro-text {
+  font-size: 0.9rem;
+  color: var(--vp-c-text-2);
+  line-height: 1.6;
+  margin-bottom: 1rem;
+  padding: 0.75rem;
+  background: var(--vp-c-bg);
+  border-radius: 6px;
+}
+
+.intro-text .highlight {
+  color: var(--vp-c-brand-1);
+  font-weight: 500;
+}
+
 .tabs {
   display: flex;
-  background: #f5f7fa;
-  border-bottom: 1px solid #e4e7ed;
+  gap: 0.5rem;
+  margin-bottom: 1rem;
 }
+
 .tab {
-  padding: 12px 24px;
+  flex: 1;
+  padding: 0.75rem;
+  background: var(--vp-c-bg);
+  border: 1px solid var(--vp-c-divider);
+  border-radius: 6px;
+  font-size: 0.85rem;
   cursor: pointer;
-  font-size: 14px;
-  color: #606266;
-  border-right: 1px solid #e4e7ed;
   transition: all 0.2s;
+  color: var(--vp-c-text-2);
+  font-weight: 500;
 }
+
+.tab:hover {
+  background: var(--vp-c-bg-soft);
+  border-color: var(--vp-c-brand);
+}
+
 .tab.active {
-  background: #fff;
-  color: #409eff;
-  font-weight: bold;
-  border-bottom: 2px solid #409eff;
-  margin-bottom: -1px;
+  background: var(--vp-c-brand-soft);
+  border-color: var(--vp-c-brand);
+  color: var(--vp-c-brand-1);
 }
+
 .content-area {
-  padding: 20px;
+  background: var(--vp-c-bg);
+  padding: 0.75rem;
+  border-radius: 6px;
+  margin-bottom: 1rem;
 }
+
 .table-wrapper {
   overflow-x: auto;
+  margin-bottom: 0.75rem;
 }
+
 table {
   width: 100%;
   border-collapse: collapse;
-  font-size: 13px;
+  font-size: 0.8rem;
 }
+
 th,
 td {
-  border: 1px solid #ebeef5;
-  padding: 8px 12px;
+  border: 1px solid var(--vp-c-divider);
+  padding: 0.5rem 0.75rem;
   text-align: left;
 }
+
 th {
-  background: #fafafa;
-  font-weight: bold;
-  color: #303133;
+  background: var(--vp-c-bg-soft);
+  font-weight: 600;
+  color: var(--vp-c-text-1);
 }
+
 .highlight-col {
-  background: #ecf5ff;
-  color: #409eff;
+  background: rgba(245, 158, 11, 0.1);
+  color: #f59e0b;
 }
+
 .highlight-cell {
-  background: #f0f9eb;
-  color: #67c23a;
-  font-weight: bold;
+  background: rgba(239, 68, 68, 0.1);
+  color: #ef4444;
+  font-weight: 500;
 }
+
+.primary-key {
+  color: var(--vp-c-brand-1);
+  font-weight: 500;
+}
+
+.foreign-key {
+  color: #f59e0b;
+  font-weight: 500;
+}
+
 .excel-view .highlight-cell {
-  background: #fef0f0;
-  color: #f56c6c;
+  background: rgba(239, 68, 68, 0.1);
+  color: #ef4444;
 }
 
 .db-layout {
   display: flex;
-  gap: 20px;
+  gap: 1rem;
   align-items: flex-start;
   flex-wrap: wrap;
 }
+
 .db-table {
   flex: 1;
   min-width: 280px;
-  border: 1px solid #ebeef5;
-  border-radius: 4px;
+  border: 1px solid var(--vp-c-divider);
+  border-radius: 6px;
   overflow: hidden;
 }
+
 .table-title {
-  background: #f2f6fc;
-  padding: 8px 12px;
-  font-weight: bold;
-  font-size: 13px;
-  color: #606266;
-  border-bottom: 1px solid #ebeef5;
+  background: var(--vp-c-bg-soft);
+  padding: 0.5rem 0.75rem;
+  font-weight: 600;
+  font-size: 0.8rem;
+  color: var(--vp-c-text-1);
+  border-bottom: 1px solid var(--vp-c-divider);
 }
+
 .connector {
   display: flex;
+  flex-direction: column;
   align-items: center;
   justify-content: center;
-  padding-top: 50px;
-  font-size: 12px;
-  color: #909399;
+  padding-top: 1.5rem;
+  font-size: 0.75rem;
+  color: var(--vp-c-text-2);
+  min-width: 100px;
 }
+
+.arrow-label {
+  font-weight: 500;
+  margin-bottom: 0.25rem;
+}
+
+.arrow {
+  color: var(--vp-c-brand-1);
+}
+
 tr.active {
-  background: #ecf5ff;
+  background: rgba(34, 197, 94, 0.1);
 }
 
 .note {
-  margin-top: 15px;
-  padding: 12px;
-  border-radius: 4px;
-  font-size: 13px;
-  line-height: 1.6;
+  padding: 0.75rem;
+  border-radius: 6px;
+  font-size: 0.85rem;
+  line-height: 1.5;
 }
+
+.note p {
+  margin: 0.25rem 0;
+}
+
 .note.error {
-  background: #fef0f0;
-  color: #f56c6c;
+  background: rgba(239, 68, 68, 0.05);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--vp-c-text-2);
 }
+
 .note.success {
-  background: #f0f9eb;
-  color: #67c23a;
+  background: rgba(34, 197, 94, 0.05);
+  border: 1px solid rgba(34, 197, 94, 0.2);
+  color: var(--vp-c-text-2);
+}
+
+.note .highlight {
+  color: var(--vp-c-brand-1);
+  font-weight: 500;
+}
+
+.info-box {
+  background: var(--vp-c-bg-alt);
+  padding: 0.75rem;
+  border-radius: 6px;
+  font-size: 0.85rem;
+  color: var(--vp-c-text-2);
+  line-height: 1.5;
+}
+
+.info-box .icon { margin-right: 0.25rem; }
+
+.info-box .highlight {
+  color: var(--vp-c-brand-1);
+  font-weight: 500;
 }
 </style>