refactor(10.2-01): nest framework packages under modules

- Move remaining beach packages and embedded admin assets\n- Rewrite framework, example, build, and gate paths

modules/wire/response.go

@@ -0,0 +1,90 @@
+package wire
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"time"
+)
+
+// WriteJSON encodes v as JSON with HTML escaping disabled and no trailing
+// newline, matching the PHP json_encode body shape used by house handlers.
+func WriteJSON(w http.ResponseWriter, status int, v any) {
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	if err := enc.Encode(v); err != nil {
+		WriteOpaque500(w)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	_, _ = w.Write(bytes.TrimSuffix(buf.Bytes(), []byte("\n")))
+}
+
+// WriteOpaque500 writes the house opaque 500 body.
+func WriteOpaque500(w http.ResponseWriter) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusInternalServerError)
+	_, _ = w.Write([]byte(`{"error":true,"message":"Internal server error"}`))
+}
+
+// Time marshals as Carbon's +00:00 form (2006-01-02T15:04:05+00:00), never
+// Go's default "Z". Unmarshal accepts both +00:00 and Z for read paths.
+type Time struct{ time.Time }
+
+const (
+	carbonLayout = "2006-01-02T15:04:05-07:00"
+	rfc3339Z     = time.RFC3339
+)
+
+func (t Time) MarshalJSON() ([]byte, error) {
+	s := t.UTC().Format("2006-01-02T15:04:05") + "+00:00"
+	return []byte(`"` + s + `"`), nil
+}
+
+func (t *Time) UnmarshalJSON(b []byte) error {
+	if t == nil {
+		return nil
+	}
+	if string(b) == "null" {
+		t.Time = time.Time{}
+		return nil
+	}
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+	var err error
+	for _, layout := range []string{carbonLayout, rfc3339Z} {
+		var parsed time.Time
+		parsed, err = time.Parse(layout, s)
+		if err == nil {
+			t.Time = parsed
+			return nil
+		}
+	}
+	return err
+}
+
+// TriBool keeps PHP's nullable-boolean tri-state: Valid=false marshals null.
+type TriBool struct{ Valid, Value bool }
+
+func (b TriBool) MarshalJSON() ([]byte, error) {
+	if !b.Valid {
+		return []byte("null"), nil
+	}
+	if b.Value {
+		return []byte("true"), nil
+	}
+	return []byte("false"), nil
+}
+
+// Slice returns s unchanged if non-nil, else a non-nil empty slice that
+// marshals to [].
+func Slice[T any](s []T) []T {
+	if s == nil {
+		return []T{}
+	}
+	return s
+}