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/GiftedDialog.vue

@@ -82,6 +82,7 @@ import GiftDetailsStep from "../components/GiftDetailsStep.vue";
 import { PlanData } from "../interfaces/records";
 import { PlatformServiceMixin } from "@/utils/PlatformServiceMixin";
 import { createNotifyHelpers, TIMEOUTS, NotifyFunction } from "@/utils/notify";
+import { showSeedPhraseReminder } from "@/utils/seedPhraseReminder";
 import {
   NOTIFY_GIFT_ERROR_NEGATIVE_AMOUNT,
   NOTIFY_GIFT_ERROR_NO_DESCRIPTION,
@@ -420,6 +421,15 @@ export default class GiftedDialog extends Vue {
         );
       } else {
         this.safeNotify.success("That gift was recorded.", 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);
+        }
+
         if (this.callbackOnSuccess) {
           this.callbackOnSuccess(amount);
         }