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

.gitignore

@@ -1,4 +1,18 @@
-_site
-.sass-cache
+# Dependencies
+node_modules/
+
+# OS and Environment
 .DS_Store
-_vendor
+.env
+.agent/
+
+# Logs
+*.log
+npm-debug.log*
+
+# SQLite Database & WAL / Journal files (runtime persistent state)
+*.db
+*.db-journal
+*.db-wal
+*.db-shm
+**/data/*.db*