translate page agent admin guide to English

src/lib/selected-app.ts

@@ -1,4 +1,5 @@
 export const selectedAppStorageKey = 'studio-admin:selected-app-id';
+export const selectedComponentByAppStorageKey = 'studio-admin:selected-component-by-app-id';
 const legacySelectedAppStorageKey = 'studio-selected-app-id';
 
 export function getStoredSelectedAppId() {
@@ -19,3 +20,32 @@ export function setStoredSelectedAppId(appId: string) {
   if (!appId) return;
   window.localStorage.setItem(selectedAppStorageKey, appId);
 }
+
+function readSelectedComponentMap(): Record<string, string> {
+  const raw = window.localStorage.getItem(selectedComponentByAppStorageKey);
+  if (!raw) return {};
+
+  try {
+    const parsed = JSON.parse(raw) as unknown;
+    if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) return {};
+    return Object.fromEntries(
+      Object.entries(parsed)
+        .filter((entry): entry is [string, string] => typeof entry[0] === 'string' && typeof entry[1] === 'string')
+    );
+  } catch {
+    return {};
+  }
+}
+
+export function getStoredSelectedComponentId(appId: string) {
+  if (!appId) return '';
+  return readSelectedComponentMap()[appId] ?? '';
+}
+
+export function setStoredSelectedComponentId(appId: string, componentId: string) {
+  if (!appId || !componentId) return;
+  window.localStorage.setItem(selectedComponentByAppStorageKey, JSON.stringify({
+    ...readSelectedComponentMap(),
+    [appId]: componentId,
+  }));
+}