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/tide/diff_test.go

@@ -0,0 +1,49 @@
+package tide
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestDiffParityClasses(t *testing.T) {
+	step := Step{ID: "d"}
+	ct := jsonCT()
+	check := func(name, want, got, path string) {
+		t.Helper()
+		diffs := compareBodies(Response{Headers: ct, Body: Body(want)}, Response{Headers: ct, Body: Body(got)}, step)
+		if len(diffs) == 0 {
+			t.Fatalf("%s: expected mismatch", name)
+		}
+		found := false
+		for _, d := range diffs {
+			if strings.Contains(d.Path, path) && d.Expected != d.Actual {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Fatalf("%s: want path %s in %+v", name, path, diffs)
+		}
+	}
+	check("null vs array", `{"tracklist":[]}`, `{"tracklist":null}`, "tracklist")
+	check("money string vs number", `{"price":"1.5000"}`, `{"price":1.5}`, "price")
+	check("null vs absent", `{"deleted_at":null}`, `{}`, "deleted_at")
+	check("tri-state bool", `{"is_owner":null}`, `{"is_owner":false}`, "is_owner")
+	check("conditional key", `{"data":{"name":"a"}}`, `{"data":{"name":"a","extra":1}}`, "extra")
+	check("date vs Z", `{"created_at":"2026-01-01T00:00:00+00:00"}`, `{"created_at":"2026-01-01T00:00:00Z"}`, "created_at")
+}
+
+func TestDecodeJSONRejectsTrailingValue(t *testing.T) {
+	if _, err := decodeJSON([]byte(`{"data":[]}`)); err != nil {
+		t.Fatalf("single value: %v", err)
+	}
+	if _, err := decodeJSON([]byte(`{"data":[]}{"debug":true}`)); err == nil || !strings.Contains(err.Error(), "trailing JSON") {
+		t.Fatalf("trailing value: %v", err)
+	}
+	want := Response{Headers: jsonCT(), Body: Body(`{"data":[]}{"debug":true}`)}
+	got := Response{Headers: jsonCT(), Body: Body(`{"data":[]}`)}
+	diffs := compareBodies(want, got, Step{ID: "trail"})
+	if len(diffs) == 0 {
+		t.Fatal("trailing JSON envelope must mismatch")
+	}
+}