Initial vibeproxy implementation

Self-contained HTTP/HTTPS/TCP/UDP reverse proxy manager written in Go,
with SQLite storage, a Bootstrap 5 admin UI (Go templates, no JS
framework), and a REST API under /api/v1.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QTXFrNP1imCW7jtfL5SZrw

internal/database/repo_settings.go

@@ -0,0 +1,35 @@
+package database
+
+import "database/sql"
+
+// GetSetting returns the raw string value for key, or def if unset.
+func GetSetting(db *sql.DB, key, def string) string {
+	var v string
+	err := db.QueryRow(`SELECT value FROM settings WHERE key = ?`, key).Scan(&v)
+	if err != nil {
+		return def
+	}
+	return v
+}
+
+func SetSetting(db *sql.DB, key, value string) error {
+	_, err := db.Exec(`INSERT INTO settings (key, value) VALUES (?, ?) ON CONFLICT(key) DO UPDATE SET value = excluded.value`, key, value)
+	return err
+}
+
+func AllSettings(db *sql.DB) (map[string]string, error) {
+	rows, err := db.Query(`SELECT key, value FROM settings`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	out := map[string]string{}
+	for rows.Next() {
+		var k, v string
+		if err := rows.Scan(&k, &v); err != nil {
+			return nil, err
+		}
+		out[k] = v
+	}
+	return out, rows.Err()
+}