Initial lookbook implementation

Pinterest-style visual bookmarking app with:
- URL metadata extraction (OG/Twitter meta, oEmbed fallback)
- Image caching in Postgres with 480px thumbnails
- Multi-tag filtering with Ctrl/Cmd for OR mode
- Fuzzy tag suggestions and inline tag editing
- Browser console auth() with first-use password setup
- Brutalist UI with Commit Mono font and Pico CSS
- Light/dark mode via browser preference

vendor/github.com/pressly/goose/v3/database/sql_extended.go

@@ -0,0 +1,23 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+)
+
+// DBTxConn is a thin interface for common methods that is satisfied by *sql.DB, *sql.Tx and
+// *sql.Conn.
+//
+// There is a long outstanding issue to formalize a std lib interface, but alas. See:
+// https://github.com/golang/go/issues/14468
+type DBTxConn interface {
+	ExecContext(ctx context.Context, query string, args ...any) (sql.Result, error)
+	QueryContext(ctx context.Context, query string, args ...any) (*sql.Rows, error)
+	QueryRowContext(ctx context.Context, query string, args ...any) *sql.Row
+}
+
+var (
+	_ DBTxConn = (*sql.DB)(nil)
+	_ DBTxConn = (*sql.Tx)(nil)
+	_ DBTxConn = (*sql.Conn)(nil)
+)