test: cover repository create validation guards

app/src/test/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailRepositoryTest.kt

@@ -275,6 +275,16 @@ class BoardDetailRepositoryTest {
         assertEquals("List title is required", (result as BoardsApiResult.Failure).message)
     }
 
+    @Test
+    fun createListRejectsBlankBoardPublicId() = runTest {
+        val repository = createRepository()
+
+        val result = repository.createList(boardPublicId = "   ", title = "New List")
+
+        assertTrue(result is BoardsApiResult.Failure)
+        assertEquals("Board id is required", (result as BoardsApiResult.Failure).message)
+    }
+
     @Test
     fun createListDelegatesToApiWithTrimmedIds() = runTest {
         val apiClient = FakeBoardDetailApiClient()
@@ -288,6 +298,38 @@ class BoardDetailRepositoryTest {
         assertEquals(0, apiClient.lastCreateListAppendIndex)
     }
 
+    @Test
+    fun createCardRejectsBlankListPublicId() = runTest {
+        val repository = createRepository()
+
+        val result = repository.createCard(
+            listPublicId = "  ",
+            title = "Card",
+            description = null,
+            dueDate = null,
+            tagPublicIds = emptyList(),
+        )
+
+        assertTrue(result is BoardsApiResult.Failure)
+        assertEquals("List id is required", (result as BoardsApiResult.Failure).message)
+    }
+
+    @Test
+    fun createCardRejectsBlankTitle() = runTest {
+        val repository = createRepository()
+
+        val result = repository.createCard(
+            listPublicId = "list-1",
+            title = "   ",
+            description = null,
+            dueDate = null,
+            tagPublicIds = emptyList(),
+        )
+
+        assertTrue(result is BoardsApiResult.Failure)
+        assertEquals("Card title is required", (result as BoardsApiResult.Failure).message)
+    }
+
     @Test
     fun getBoardDetailValidatesBoardId() = runTest {
         val repository = createRepository()