Require explicit persisted acknowledgement of notifications

tests/notifications-client.test.mjs

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+import test from 'node:test';
+import assert from 'node:assert/strict';
+import {mergeServerNotifications,acknowledgeNotifications} from '../src/services/notifications.js';
+const rows=[{id:'one',baslik:'Tarih değişti',metin:'Yeni tarih',okundu:0,zaman:'2026-09-06T10:00:00Z'}];
+test('refresh keeps stable notification identities and server unread state without acknowledging delivery',()=>{
+ const once=mergeServerNotifications([{id:'local',title:'Yerel',read:false}],rows);
+ const twice=mergeServerNotifications(once,rows);
+ assert.deepEqual(twice,once);assert.equal(twice[0].read,false);assert.equal(twice.length,2);
+ assert.equal(mergeServerNotifications(twice,[{...rows[0],okundu:1}])[0].read,true);
+ assert.throws(()=>mergeServerNotifications([],{}),/geçersiz/);
+});
+test('read acknowledgement requires server success and only covers the captured unread snapshot',async()=>{
+ const current=mergeServerNotifications([{id:'local',read:false}],rows);
+ await assert.rejects(acknowledgeNotifications(current,async()=>{throw new Error('depo kapalı');}),/depo kapalı/);
+ assert.equal(current[0].read,false);
+ await assert.rejects(acknowledgeNotifications(current,async()=>({success:true,okundu:0})),/kaydedilemedi/);
+ const acknowledged=await acknowledgeNotifications(current,async ids=>{assert.deepEqual(ids,['one']);return {success:true,okundu:1};});
+ assert.deepEqual([...acknowledged],['server:one','local']);assert.equal(acknowledged.has('arrived-later'),false);
+});