feat: full studio build -- light theme, canvas thumbnails, i18n (fa/en)

src/lib/dev-project-storage.ts

@@ -0,0 +1,49 @@
+const STORAGE_PREFIX = "flatrender-project-";
+
+export interface LocalProjectSnapshot {
+  scene_data: Record<string, unknown>;
+  name?: string;
+  savedAt: string;
+}
+
+export function localProjectStorageKey(projectId: string): string {
+  return `${STORAGE_PREFIX}${projectId}`;
+}
+
+export function saveLocalProject(
+  projectId: string,
+  snapshot: Omit<LocalProjectSnapshot, "savedAt">
+): void {
+  if (typeof window === "undefined") return;
+
+  const payload: LocalProjectSnapshot = {
+    ...snapshot,
+    savedAt: new Date().toISOString(),
+  };
+
+  window.localStorage.setItem(
+    localProjectStorageKey(projectId),
+    JSON.stringify(payload)
+  );
+}
+
+export function loadLocalProject(projectId: string): LocalProjectSnapshot | null {
+  if (typeof window === "undefined") return null;
+
+  const raw = window.localStorage.getItem(localProjectStorageKey(projectId));
+  if (!raw) return null;
+
+  try {
+    const parsed = JSON.parse(raw) as LocalProjectSnapshot;
+    if (!parsed.scene_data || typeof parsed.scene_data !== "object") {
+      return null;
+    }
+    return parsed;
+  } catch {
+    return null;
+  }
+}
+
+export function isDevelopmentEnv(): boolean {
+  return process.env.NODE_ENV === "development";
+}