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

sample-content/plugins/google-analytics/index.js

@@ -0,0 +1,17 @@
+module.exports = {
+  injectHead({ pluginConfig }) {
+    const trackingId = pluginConfig.tracking_id;
+    if (!trackingId) return '';
+
+    return `
+    <!-- Google Analytics (GA4 via Plugin) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=${trackingId}"></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
+      gtag('config', '${trackingId}');
+    </script>
+    `;
+  }
+};

sample-content/plugins/google-analytics/plugin.json

@@ -0,0 +1,5 @@
+{
+  "name": "google-analytics",
+  "version": "1.0.0",
+  "description": "Injects Google Analytics 4 tracking script into head"
+}

sample-content/plugins/reading-time/index.js

@@ -0,0 +1,18 @@
+module.exports = {
+  onPostLoad({ post }) {
+    const wordCount = (post.rawContent || '').trim().split(/\s+/).length;
+    // Assume average 200 words per minute
+    const minutes = Math.max(1, Math.round(wordCount / 200));
+    post.readingTime = `${minutes} min read`;
+    post.wordCount = wordCount;
+  },
+
+  injectPostEnd({ post }) {
+    if (post && post.readingTime) {
+      return `<div style="font-family: var(--font-sans); font-size: 0.85rem; color: var(--color-text-muted); margin-top: 2rem; padding: 0.75rem 1rem; background: var(--color-surface-soft); border-radius: var(--radius-sm);">
+        Article statistics: ~${post.wordCount} words &bull; ${post.readingTime}
+      </div>`;
+    }
+    return '';
+  }
+};

sample-content/plugins/reading-time/plugin.json

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+{
+  "name": "reading-time",
+  "version": "1.0.0",
+  "description": "Calculates reading time and word count for articles"
+}

sample-content/plugins/seo-analyzer/index.js

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+module.exports = {
+  onPostLoad({ post }) {
+    const raw = post.rawContent || '';
+    const internalMatches = raw.match(/\[[^\]]+\]\((\/[^)]+)\)/g) || [];
+    const externalMatches = raw.match(/\[[^\]]+\]\((https?:\/\/[^)]+)\)/g) || [];
+
+    post.seoMetrics = {
+      internalLinkCount: internalMatches.length,
+      externalLinkCount: externalMatches.length,
+      hasMetaDescription: Boolean(post.excerpt && post.excerpt.length > 30),
+      titleLength: post.title.length,
+      isTitleOptimal: post.title.length >= 25 && post.title.length <= 70
+    };
+  }
+};

sample-content/plugins/seo-analyzer/plugin.json

@@ -0,0 +1,5 @@
+{
+  "name": "seo-analyzer",
+  "version": "1.0.0",
+  "description": "Dynamic SEO auditor and content health inspector"
+}