feat: initial release of pengzhan.dev personal editorial blog platform

- Editorial web platform built with Node.js, Express, EJS, and Vanilla CSS
- Markdown content engine with YAML frontmatter, bilingual variants, and hot-reload watcher
- Unified SQLite with FTS5 search indexing, query logging, and schema filters
- Centered editorial post layout with margin-docked left TOC and mobile bottom sheet
- WordPress-grade comment system with moderation dashboard and bulk operations under /guanli
- Complete SEO suite (JSON-LD structured data, RSS/Atom feeds, XML sitemap, robots.txt)
- CI/CD workflows for linting, security audits (Gitleaks), automated tests, and Docker releases

views/partials/header.ejs

@@ -0,0 +1,42 @@
+<header class="site-header">
+  <div class="container header-inner">
+    <a href="/" class="brand">
+      <span class="brand-title"><%= site.title %></span>
+      <% if (site.tagline) { %>
+        <span class="brand-tagline"><%= site.tagline %></span>
+      <% } %>
+    </a>
+
+    <!-- Desktop Navigation -->
+    <nav class="site-nav desktop-nav">
+      <% (navigation || []).forEach(item => { 
+        const isActive = (currentPath === item.path) || (item.path !== '/' && currentPath.startsWith(item.path));
+      %>
+        <a href="<%= item.path %>" class="nav-link <%= isActive ? 'active' : '' %>">
+          <%= item.label %>
+        </a>
+      <% }) %>
+    </nav>
+
+    <!-- Mobile Hamburger Toggle Button -->
+    <button type="button" class="mobile-menu-toggle" id="mobile-menu-toggle" aria-label="Toggle Navigation Menu" aria-expanded="false">
+      <span class="hamburger-line"></span>
+      <span class="hamburger-line"></span>
+      <span class="hamburger-line"></span>
+    </button>
+  </div>
+
+  <!-- Mobile Slide-Down Drawer -->
+  <div class="mobile-nav-drawer" id="mobile-nav-drawer">
+    <nav class="mobile-nav-links">
+      <% (navigation || []).forEach(item => { 
+        const isActive = (currentPath === item.path) || (item.path !== '/' && currentPath.startsWith(item.path));
+      %>
+        <a href="<%= item.path %>" class="mobile-nav-link <%= isActive ? 'active' : '' %>">
+          <span><%= item.label %></span>
+          <span class="mobile-nav-arrow">&rarr;</span>
+        </a>
+      <% }) %>
+    </nav>
+  </div>
+</header>