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/provider_errors.go

@@ -0,0 +1,48 @@
+package goose
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	// ErrVersionNotFound is returned when a specific migration version is not located. This can
+	// occur if a .sql file or a Go migration function for the specified version is missing.
+	ErrVersionNotFound = errors.New("version not found")
+
+	// ErrNoMigrations is returned by [NewProvider] when no migrations are found.
+	ErrNoMigrations = errors.New("no migrations found")
+
+	// ErrAlreadyApplied indicates that the migration cannot be applied because it has already been
+	// executed. This error is returned by [Provider.Apply].
+	ErrAlreadyApplied = errors.New("migration already applied")
+
+	// ErrNotApplied indicates that the rollback cannot be performed because the migration has not
+	// yet been applied. This error is returned by [Provider.Apply].
+	ErrNotApplied = errors.New("migration not applied")
+
+	// errInvalidVersion is returned when a migration version is invalid.
+	errInvalidVersion = errors.New("version must be greater than 0")
+)
+
+// PartialError is returned when a migration fails, but some migrations already got applied.
+type PartialError struct {
+	// Applied are migrations that were applied successfully before the error occurred. May be
+	// empty.
+	Applied []*MigrationResult
+	// Failed contains the result of the migration that failed. Cannot be nil.
+	Failed *MigrationResult
+	// Err is the error that occurred while running the migration and caused the failure.
+	Err error
+}
+
+func (e *PartialError) Error() string {
+	return fmt.Sprintf(
+		"partial migration error (type:%s,version:%d): %v",
+		e.Failed.Source.Type, e.Failed.Source.Version, e.Err,
+	)
+}
+
+func (e *PartialError) Unwrap() error {
+	return e.Err
+}