Add static site builder: SQLite-backed MD→HTML pipeline

- cmd/nebbet: CLI with build [--watch] and user add/passwd/delete/list
- internal/builder: markdown→HTML, component injection via HTML comments,
  auto importmap from lib/, fsnotify watch with 150ms debounce
- internal/db: meta.db (page index, tag queries) + search.db (FTS5)
- internal/sqlitedrv: minimal CGO database/sql driver for system libsqlite3
- internal/auth: htpasswd-compatible bcrypt password file management
- templates/base.html + admin.html, styles/main.css + admin.css
- nginx.conf with auth_basic for /admin, clean URLs, gzip
- nebbet.service systemd unit for watch daemon
- Example content/index.md and components/site-greeting.js

https://claude.ai/code/session_01HTc1BCBCiMTEB54XQP1Wz9

1 files changed, 64 insertions, 0 deletions

diff --git a/internal/builder/frontmatter.go b/internal/builder/frontmatter.go
new file mode 100644
index 0000000..34de484
--- /dev/null
+++ b/internal/builder/frontmatter.go
@@ -0,0 +1,64 @@
+package builder
+
+import (
+	"strings"
+)
+
+// Frontmatter holds parsed page metadata from YAML-style front matter.
+type Frontmatter struct {
+	Title  string
+	Date   string
+	Tags   []string
+	Layout string // template name without extension, default "base"
+	Draft  bool
+}
+
+// ParseFrontmatter splits the optional ---...--- block from the markdown body.
+// Supports: title, date, tags (comma-list or [a, b]), layout, draft.
+func ParseFrontmatter(content string) (Frontmatter, string) {
+	fm := Frontmatter{Layout: "base"}
+	if !strings.HasPrefix(content, "---") {
+		return fm, content
+	}
+	// Find closing ---
+	rest := content[3:]
+	end := strings.Index(rest, "\n---")
+	if end == -1 {
+		return fm, content
+	}
+	block := strings.TrimSpace(rest[:end])
+	body := strings.TrimSpace(rest[end+4:]) // skip \n---
+
+	for _, line := range strings.Split(block, "\n") {
+		k, v, ok := strings.Cut(strings.TrimSpace(line), ":")
+		if !ok {
+			continue
+		}
+		k = strings.TrimSpace(k)
+		v = strings.TrimSpace(v)
+		switch k {
+		case "title":
+			fm.Title = strings.Trim(v, `"'`)
+		case "date":
+			fm.Date = v
+		case "layout":
+			fm.Layout = strings.Trim(v, `"'`)
+		case "draft":
+			fm.Draft = v == "true"
+		case "tags":
+			fm.Tags = parseTags(v)
+		}
+	}
+	return fm, body
+}
+
+func parseTags(v string) []string {
+	v = strings.Trim(v, "[] ")
+	var tags []string
+	for _, p := range strings.Split(v, ",") {
+		if t := strings.Trim(strings.TrimSpace(p), `"'`); t != "" {
+			tags = append(tags, t)
+		}
+	}
+	return tags
+}