android: expand quality coverage and smoke baseline docs

android/app/src/test/java/ru/daemonlord/messenger/data/message/local/dao/MessageDaoTest.kt

@@ -12,6 +12,7 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.RobolectricTestRunner
 import ru.daemonlord.messenger.data.chat.local.db.MessengerDatabase
+import ru.daemonlord.messenger.data.message.local.entity.MessageAttachmentEntity
 import ru.daemonlord.messenger.data.message.local.entity.MessageEntity
 
 @RunWith(RobolectricTestRunner::class)
@@ -60,6 +61,28 @@ class MessageDaoTest {
         assertEquals(2L, chat20.first().message.id)
     }
 
+    @Test
+    fun observeRecentMessages_returnsAttachmentsRelation() = runTest {
+        dao.upsertMessages(listOf(message(id = 10, chatId = 1, text = "with attachment")))
+        dao.upsertAttachments(
+            listOf(
+                MessageAttachmentEntity(
+                    id = 501,
+                    messageId = 10,
+                    fileUrl = "https://s3.daemonlord.ru/test.jpg",
+                    fileType = "image/jpeg",
+                    fileSize = 1234,
+                    waveformPointsJson = null,
+                )
+            )
+        )
+
+        val items = dao.observeRecentMessages(chatId = 1).first()
+        assertEquals(1, items.size)
+        assertEquals(1, items.first().attachments.size)
+        assertEquals("image/jpeg", items.first().attachments.first().fileType)
+    }
+
     private fun message(id: Long, chatId: Long, text: String): MessageEntity {
         return MessageEntity(
             id = id,

android/app/src/test/java/ru/daemonlord/messenger/data/realtime/RealtimeEventParserTest.kt

@@ -71,4 +71,18 @@ class RealtimeEventParserTest {
         assertEquals(100L, mapped.replyToMessageId)
         assertEquals("hi", mapped.text)
     }
+
+    @Test
+    fun parseConnect_returnsConnectedEvent() {
+        val payload = """
+            {
+              "event": "connect",
+              "payload": {"user_id": 1},
+              "timestamp": "2026-03-09T12:00:00Z"
+            }
+        """.trimIndent()
+
+        val event = parser.parse(payload)
+        assertTrue(event is RealtimeEvent.Connected)
+    }
 }