Default browser notifications on through a first-login permission prompt with category controls

Hop-State: A_06FPDKC36EGSF1DQQ929QZR
Hop-Proposal: R_06FPDKBGHD5F0RARPQPEGTG
Hop-Task: T_06FPDJYX8ADKQPCJRTD1TS8
Hop-Attempt: AT_06FPDJYX89JABJ674EYANCR

src/lib/notifications/browser.test.ts

@@ -3,6 +3,7 @@ import { describe, expect, it } from 'vitest';
 import {
     browserNotificationsEnabledKey,
     getBrowserNotificationContent,
+    parseBrowserNotificationPreferences,
 } from './browser';
 
 describe('browser notification presentation', () => {
@@ -11,6 +12,21 @@ describe('browser notification presentation', () => {
             .toBe('synapsis:browser-notifications:user-1');
     });
 
+    it('defaults every notification category on and preserves explicit choices', () => {
+        expect(parseBrowserNotificationPreferences(null)).toEqual({
+            follow: true,
+            like: true,
+            repost: true,
+            mention: true,
+            reply: true,
+        });
+        expect(parseBrowserNotificationPreferences('{"like":false}')).toMatchObject({
+            follow: true,
+            like: false,
+            mention: true,
+        });
+    });
+
     it('links post interactions to the relevant post', () => {
         expect(getBrowserNotificationContent({
             id: 'notification-1',