fix(compose): restore Bcc recipients when resuming a draft

saveOrDeleteDraft persists the Bcc line, but the init-block restore
never copied it back, so reopening a draft silently dropped its Bcc
recipients (and re-saving then lost them for good).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/src/main/kotlin/org/libremail/ui/compose/ComposeViewModel.kt

@@ -98,6 +98,7 @@ class ComposeViewModel @Inject constructor(
                         it.copy(
                             to = draft.to,
                             cc = draft.cc,
+                            bcc = draft.bcc,
                             subject = draft.subject,
                             body = draft.body,
                             bodyHtml = draft.bodyHtml,

app/src/test/kotlin/org/libremail/ui/compose/ComposeViewModelTest.kt

@@ -153,6 +153,27 @@ class ComposeViewModelTest {
         assertEquals("<p>Draft <b>body</b></p>", vm.state.value.bodyHtml)
     }
 
+    @Test
+    fun `resuming a draft restores the bcc recipients`() = runTest(testDispatcher) {
+        val mailRepository = mockk<MailRepository>(relaxed = true)
+        coEvery { mailRepository.getDraft("d1") } returns Draft(
+            id = "d1",
+            accountId = "imap:a",
+            to = "x@example.org",
+            cc = "",
+            bcc = "hidden@example.org",
+            subject = "Hi",
+            body = "Draft body",
+            updatedAt = 0L,
+        )
+        val vm = viewModel(
+            savedState = SavedStateHandle(mapOf(Routes.COMPOSE_ARG_DRAFT to "d1")),
+            mailRepository = mailRepository,
+        )
+
+        assertEquals("hidden@example.org", vm.state.value.bcc)
+    }
+
     @Test
     fun `send carries the HTML body through to the outgoing message`() = runTest(testDispatcher) {
         val mailRepository = mockk<MailRepository>(relaxed = true)