fix(chat): limit external browser prompt daily

src/data/storage/app/app_storage.ts

@@ -30,6 +30,26 @@ export class AppStorage {
     return SpAsyncUtil.setString(StorageKeys.lastPwaDialogShown, todayString);
   }
 
+  // ---- external browser dialog ----
+
+  static async canShowExternalBrowserDialog(
+    todayString: string,
+  ): Promise<ResultT<boolean>> {
+    return AppStorage.canReportKey(
+      StorageKeys.lastExternalBrowserDialogShown,
+      todayString,
+    );
+  }
+
+  static recordExternalBrowserDialogShown(
+    todayString: string,
+  ): Promise<ResultT<void>> {
+    return SpAsyncUtil.setString(
+      StorageKeys.lastExternalBrowserDialogShown,
+      todayString,
+    );
+  }
+
   // ---- PWA event reporting ----
 
   static canReportPwaEvent(todayString: string): Promise<ResultT<boolean>> {

src/data/storage/storage_keys.ts

@@ -26,6 +26,7 @@ export const StorageKeys = {
 
   // pwa / app info
   lastPwaDialogShown: "last_pwa_dialog_shown",
+  lastExternalBrowserDialogShown: "last_external_browser_dialog_shown",
   lastPwaEventReported: "last_pwa_event_reported",
   lastAppInfoReported: "last_app_info_reported",
 } as const;