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/libs/endorserServer.ts

@@ -1313,6 +1313,28 @@ export const capitalizeAndInsertSpacesBeforeCaps = (text: string) => {
     : text[0].toUpperCase() + text.substr(1).replace(/([A-Z])/g, " $1");
 };
 
+/**
+ * Formats type string for display by adding spaces before capitals
+ * and optionally adds an appropriate article prefix (a/an)
+ *
+ * @param text - Text to format
+ * @returns Formatted string with article prefix
+ */
+export const capitalizeAndInsertSpacesBeforeCapsWithAPrefix = (
+  text: string,
+): string => {
+  const word = capitalizeAndInsertSpacesBeforeCaps(text);
+  if (word) {
+    // if the word starts with a vowel, use "an" instead of "a"
+    const firstLetter = word[0].toLowerCase();
+    const vowels = ["a", "e", "i", "o", "u"];
+    const particle = vowels.includes(firstLetter) ? "an" : "a";
+    return particle + " " + word;
+  } else {
+    return "";
+  }
+};
+
 /**
  return readable summary of claim, or something generic
 

src/libs/util.ts

@@ -160,6 +160,41 @@ export const isGiveAction = (
   return isGiveClaimType(veriClaim.claimType);
 };
 
+export interface OfferFulfillment {
+  offerHandleId: string;
+  offerType: string;
+}
+
+/**
+ * Extract offer fulfillment information from the fulfills field
+ * Handles both array and single object cases
+ */
+export const extractOfferFulfillment = (fulfills: any): OfferFulfillment | null => {
+  if (!fulfills) {
+    return null;
+  }
+  
+  // Handle both array and single object cases
+  let offerFulfill = null;
+  
+  if (Array.isArray(fulfills)) {
+    // Find the Offer in the fulfills array
+    offerFulfill = fulfills.find((item) => item["@type"] === "Offer");
+  } else if (fulfills["@type"] === "Offer") {
+    // fulfills is a single Offer object
+    offerFulfill = fulfills;
+  }
+  
+  if (offerFulfill) {
+    return {
+      offerHandleId: offerFulfill.identifier,
+      offerType: offerFulfill["@type"],
+    };
+  }
+  
+  return null;
+};
+
 export const shortDid = (did: string) => {
   if (did.startsWith("did:peer:")) {
     return (