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/internal/dialects/postgres.go

@@ -0,0 +1,70 @@
+package dialects
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/pressly/goose/v3/database/dialect"
+)
+
+// NewPostgres returns a new [dialect.Querier] for PostgreSQL dialect.
+func NewPostgres() dialect.QuerierExtender {
+	return &postgres{}
+}
+
+type postgres struct{}
+
+var _ dialect.QuerierExtender = (*postgres)(nil)
+
+func (p *postgres) CreateTable(tableName string) string {
+	q := `CREATE TABLE %s (
+		id integer PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY,
+		version_id bigint NOT NULL,
+		is_applied boolean NOT NULL,
+		tstamp timestamp NOT NULL DEFAULT now()
+	)`
+	return fmt.Sprintf(q, tableName)
+}
+
+func (p *postgres) InsertVersion(tableName string) string {
+	q := `INSERT INTO %s (version_id, is_applied) VALUES ($1, $2)`
+	return fmt.Sprintf(q, tableName)
+}
+
+func (p *postgres) DeleteVersion(tableName string) string {
+	q := `DELETE FROM %s WHERE version_id=$1`
+	return fmt.Sprintf(q, tableName)
+}
+
+func (p *postgres) GetMigrationByVersion(tableName string) string {
+	q := `SELECT tstamp, is_applied FROM %s WHERE version_id=$1 ORDER BY tstamp DESC LIMIT 1`
+	return fmt.Sprintf(q, tableName)
+}
+
+func (p *postgres) ListMigrations(tableName string) string {
+	q := `SELECT version_id, is_applied from %s ORDER BY id DESC`
+	return fmt.Sprintf(q, tableName)
+}
+
+func (p *postgres) GetLatestVersion(tableName string) string {
+	q := `SELECT max(version_id) FROM %s`
+	return fmt.Sprintf(q, tableName)
+}
+
+func (p *postgres) TableExists(tableName string) string {
+	schemaName, tableName := parseTableIdentifier(tableName)
+	if schemaName != "" {
+		q := `SELECT EXISTS ( SELECT 1 FROM pg_tables WHERE schemaname = '%s' AND tablename = '%s' )`
+		return fmt.Sprintf(q, schemaName, tableName)
+	}
+	q := `SELECT EXISTS ( SELECT 1 FROM pg_tables WHERE (current_schema() IS NULL OR schemaname = current_schema()) AND tablename = '%s' )`
+	return fmt.Sprintf(q, tableName)
+}
+
+func parseTableIdentifier(name string) (schema, table string) {
+	schema, table, found := strings.Cut(name, ".")
+	if !found {
+		return "", name
+	}
+	return schema, table
+}