Initial commit: Lookbook personal collection app

Pinterest-like app for saving images, videos, quotes, and embeds.

Features:
- Go backend with PostgreSQL, SSR templates
- Console-based admin auth (login/logout via browser console)
- Item types: images, videos (ffmpeg transcoding), quotes, embeds
- Media stored as BLOBs in PostgreSQL
- OpenGraph metadata extraction for links
- Embed detection for YouTube, Vimeo, Twitter/X
- Masonry grid layout, item detail pages
- Tag system with filtering
- Refresh metadata endpoint with change warnings
- Replace media endpoint for updating item images/videos

internal/data/admin/queries.go

@@ -0,0 +1,41 @@
+package admin
+
+import (
+	"context"
+	"database/sql"
+	"time"
+)
+
+type Row struct {
+	ID           int
+	PasswordHash []byte // nil if not set
+	CreatedAt    time.Time
+}
+
+// QGet returns the single admin row.
+func QGet(ctx context.Context, db *sql.DB) (Row, error) {
+	query := `SELECT id, password_hash, created_at FROM admin WHERE id = 1`
+
+	var row Row
+	err := db.QueryRowContext(ctx, query).Scan(
+		&row.ID,
+		&row.PasswordHash,
+		&row.CreatedAt,
+	)
+	return row, err
+}
+
+// QSetPassword sets the admin password hash.
+func QSetPassword(ctx context.Context, db *sql.DB, hash []byte) error {
+	query := `UPDATE admin SET password_hash = $1 WHERE id = 1`
+	_, err := db.ExecContext(ctx, query, hash)
+	return err
+}
+
+// QHasPassword returns true if a password has been set.
+func QHasPassword(ctx context.Context, db *sql.DB) (bool, error) {
+	query := `SELECT password_hash IS NOT NULL FROM admin WHERE id = 1`
+	var has bool
+	err := db.QueryRowContext(ctx, query).Scan(&has)
+	return has, err
+}