v0.3.1 with Saxon fully working

src/workspace/localStorageStore.ts

@@ -0,0 +1,52 @@
+import { createDefaultWorkbenchState } from './defaultWorkspace';
+import type { WorkbenchState } from './workspaceTypes';
+
+const STORAGE_KEY = 'xslt-tools:workspace:v1';
+
+function isWorkbenchState(value: unknown): value is WorkbenchState {
+  if (!value || typeof value !== 'object') return false;
+
+  const candidate = value as Partial<WorkbenchState>;
+  return (
+    candidate.schemaVersion === 1 &&
+    Boolean(candidate.xmlInput) &&
+    Boolean(candidate.xsltCode) &&
+    Boolean(candidate.xmlOutput)
+  );
+}
+
+export function loadWorkbenchState(): WorkbenchState {
+  const fallback = createDefaultWorkbenchState();
+
+  try {
+    const raw = window.localStorage.getItem(STORAGE_KEY);
+    if (!raw) return fallback;
+
+    const parsed = JSON.parse(raw) as unknown;
+    if (!isWorkbenchState(parsed)) return fallback;
+
+    return {
+      ...fallback,
+      ...parsed,
+      options: { ...fallback.options, ...parsed.options },
+      xmlInput: { ...fallback.xmlInput, ...parsed.xmlInput },
+      xsltCode: { ...fallback.xsltCode, ...parsed.xsltCode },
+      xmlOutput: { ...fallback.xmlOutput, ...parsed.xmlOutput },
+    };
+  } catch (error) {
+    console.warn('Failed to load workspace from LocalStorage.', error);
+    return fallback;
+  }
+}
+
+export function saveWorkbenchState(state: WorkbenchState): void {
+  try {
+    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(state));
+  } catch (error) {
+    console.warn('Failed to save workspace to LocalStorage.', error);
+  }
+}
+
+export function clearWorkbenchState(): void {
+  window.localStorage.removeItem(STORAGE_KEY);
+}