fix: improve endgame clock and gameplay stability

internal/sdkserver/api_scene_command_test.go

@@ -0,0 +1,68 @@
+package sdkserver
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestSceneCommandsPreserveImportedSave(t *testing.T) {
+	chdirRepoRootSDK(t)
+	before, err := os.ReadFile("freesr-data.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	run := func(command string) bool {
+		body, _ := json.Marshal(map[string]string{"command": command})
+		w := httptest.NewRecorder()
+		apiCommand(w, httptest.NewRequest(http.MethodPost, "/api/command", strings.NewReader(string(body))))
+		var result struct {
+			Success bool `json:"success"`
+		}
+		if err := json.Unmarshal(w.Body.Bytes(), &result); err != nil {
+			t.Fatal(err)
+		}
+		return result.Success
+	}
+	persistentBefore, err := os.ReadFile("persistent")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, invalid := range []string{"/teleport invalid", "/scene 0", "/teleport 123 bad", "/teleport 123 456 extra", "/clear lineup"} {
+		if run(invalid) {
+			t.Fatalf("accepted %s", invalid)
+		}
+		after, _ := os.ReadFile("persistent")
+		if string(after) != string(persistentBefore) {
+			t.Fatalf("invalid command %s wrote persistent", invalid)
+		}
+	}
+	for _, command := range []string{"/teleport 123 456"} {
+		if !run(command) {
+			t.Fatalf("command failed: %s", command)
+		}
+		after, err := os.ReadFile("freesr-data.json")
+		if err != nil || string(after) != string(before) {
+			t.Fatalf("%s changed imported save", command)
+		}
+	}
+	raw, err := os.ReadFile("persistent")
+	if err != nil {
+		t.Fatal(err)
+	}
+	var saved struct {
+		Scene struct {
+			PlaneID uint32 `json:"plane_id"`
+			FloorID uint32 `json:"floor_id"`
+		} `json:"scene"`
+	}
+	if err := json.Unmarshal(raw, &saved); err != nil {
+		t.Fatal(err)
+	}
+	if saved.Scene.PlaneID != 123 || saved.Scene.FloorID != 456 {
+		t.Fatalf("persistent changes missing: %+v", saved)
+	}
+}