docs: merge notification system docs into single Native-First guide

- Consolidate 5 notification-system-* files into doc/notification-system.md
- Add web-push cleanup guide and Start-on-Login glossary entry
- Configure markdownlint for consistent formatting
- Remove web-push references, focus on native OS scheduling

Reduces maintenance overhead while preserving all essential information
in a single, well-formatted reference document.

src/components/OfferDialog.vue

@@ -64,6 +64,7 @@ import * as libsUtil from "../libs/util";
 import { logger } from "../utils/logger";
 import { PlatformServiceMixin } from "@/utils/PlatformServiceMixin";
 import { createNotifyHelpers, TIMEOUTS } from "@/utils/notify";
+import { showSeedPhraseReminder } from "@/utils/seedPhraseReminder";
 import {
   NOTIFY_OFFER_SETTINGS_ERROR,
   NOTIFY_OFFER_RECORDING,
@@ -303,6 +304,14 @@ export default class OfferDialog extends Vue {
         );
       } else {
         this.notify.success(NOTIFY_OFFER_SUCCESS.message, TIMEOUTS.VERY_LONG);
+
+        // Show seed phrase backup reminder if needed
+        try {
+          const settings = await this.$accountSettings();
+          showSeedPhraseReminder(!!settings.hasBackedUpSeed, this.$notify);
+        } catch (error) {
+          logger.error("Error checking seed backup status:", error);
+        }
       }
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
     } catch (error: any) {