fix: preserve complete weekly brief content and date bounds

tests/brief-delivery.test.mjs

@@ -75,3 +75,24 @@ test('one recipient failure does not skip subsequent recipients; feed failure is
   assert.deepEqual(f.calls,['email']);
   await assert.rejects(f.send(async()=>{throw new Error('Feed unavailable');}),/Feed unavailable/);
 });
+
+test('long brief is sent completely as plain text with each part accounted for',async()=>{
+  const content=('Ürün <test> & 🧪\n').repeat(700),sent=[];
+  const f=fixture({text:()=>content,emailConfigured:()=>false,
+    sendTelegram:async(chatId,text,options)=>{sent.push(text);assert.deepEqual(options,{parseMode:null});return true;}});
+  const result=await f.send(async()=>[]);
+  assert.equal(sent.join(''),content);
+  assert.ok(sent.length>1);
+  assert.equal(result.kanallar.telegram.kabul,sent.length);
+  assert.equal(result.hata,0);
+});
+
+test('a failed Telegram part stops subsequent parts but still attempts email',async()=>{
+  let attempts=0;
+  const f=fixture({text:()=> 'x'.repeat(12000),sendTelegram:async()=>{attempts++;if(attempts===2)throw new Error('Unavailable');return true;}});
+  const result=await f.send(async()=>[]);
+  assert.equal(attempts,2);
+  assert.deepEqual(result.kanallar.telegram,{denenen:2,kabul:1,hata:1});
+  assert.equal(result.kanallar.email.kabul,1);
+  assert.equal(result.hata,1);
+});