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/jackc/pgx/v5/pgproto3/parameter_status.go

@@ -0,0 +1,58 @@
+package pgproto3
+
+import (
+	"bytes"
+	"encoding/json"
+)
+
+type ParameterStatus struct {
+	Name  string
+	Value string
+}
+
+// Backend identifies this message as sendable by the PostgreSQL backend.
+func (*ParameterStatus) Backend() {}
+
+// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
+// type identifier and 4 byte message length.
+func (dst *ParameterStatus) Decode(src []byte) error {
+	buf := bytes.NewBuffer(src)
+
+	b, err := buf.ReadBytes(0)
+	if err != nil {
+		return err
+	}
+	name := string(b[:len(b)-1])
+
+	b, err = buf.ReadBytes(0)
+	if err != nil {
+		return err
+	}
+	value := string(b[:len(b)-1])
+
+	*dst = ParameterStatus{Name: name, Value: value}
+	return nil
+}
+
+// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
+func (src *ParameterStatus) Encode(dst []byte) ([]byte, error) {
+	dst, sp := beginMessage(dst, 'S')
+	dst = append(dst, src.Name...)
+	dst = append(dst, 0)
+	dst = append(dst, src.Value...)
+	dst = append(dst, 0)
+	return finishMessage(dst, sp)
+}
+
+// MarshalJSON implements encoding/json.Marshaler.
+func (ps ParameterStatus) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type  string
+		Name  string
+		Value string
+	}{
+		Type:  "ParameterStatus",
+		Name:  ps.Name,
+		Value: ps.Value,
+	})
+}