refactor(android): update question flow and navigation patterns (batch 6)

app/src/main/java/app/closer/core/navigation/AppNavigation.kt

@@ -202,7 +202,7 @@ fun AppNavigation(
                 route = AppRoute.DAILY_QUESTION,
                 deepLinks = listOf(navDeepLink { uriPattern = "closer://closer.app/daily_question" })
             ) {
-                DailyQuestionScreen(onNavigate = navigateRoute)
+                DailyQuestionScreen(onNavigate = navigateRoute, onBack = navigateBackOrHome)
             }
             composable(route = AppRoute.QUESTION_PACKS) {
                 QuestionPackLibraryScreen(onNavigate = navigateRoute)

app/src/main/java/app/closer/ui/questions/DailyQuestionScreen.kt

@@ -11,10 +11,17 @@ import app.closer.domain.model.Question
 @Composable
 fun DailyQuestionScreen(
     onNavigate: (String) -> Unit = {},
+    onBack: () -> Unit = {},
     viewModel: DailyQuestionViewModel = hiltViewModel()
 ) {
     val state by viewModel.uiState.collectAsState()
 
+    // Reveal is only offered once both partners have answered — the reveal screen enforces
+    // this too, but surfacing the button early is misleading and should be avoided.
+    val revealRoute: (() -> Unit)? = if (state.submitted && state.partnerHasAnswered) {
+        state.question?.let { q -> { onNavigate(AppRoute.answerReveal(q.id)) } }
+    } else null
+
     LocalQuestionContent(
         state = state,
         title = "One question, enough space",
@@ -25,20 +32,17 @@ fun DailyQuestionScreen(
             if (coupleId != null) {
                 onNavigate(AppRoute.questionThread(coupleId, question.id))
             } else {
-                // Discussing requires a paired partner; send unpaired users to invite one.
                 onNavigate(AppRoute.CREATE_INVITE)
             }
         },
-        onSecondaryRoute = state.question?.let {
-            { onNavigate(AppRoute.answerReveal(it.id)) }
-        },
-        secondaryRouteLabel = "Reveal",
+        onSecondaryRoute = revealRoute,
+        secondaryRouteLabel = if (revealRoute != null) "Reveal" else null,
         onWrittenTextChanged = viewModel::updateWrittenText,
         onOptionToggled = viewModel::toggleOption,
         onScaleChanged = viewModel::updateScale,
         onSubmit = viewModel::submitAnswer,
         canSubmit = viewModel.canSubmit(),
-        onRefresh = viewModel::loadDailyQuestion
+        onBack = onBack
     )
 }
 

app/src/main/java/app/closer/ui/questions/DailyQuestionViewModel.kt

@@ -28,7 +28,8 @@ data class LocalQuestionUiState(
     val submitted: Boolean = false,
     val pendingWrittenText: String = "",
     val pendingSelectedOptionIds: List<String> = emptyList(),
-    val pendingScaleValue: Int = 3
+    val pendingScaleValue: Int = 3,
+    val partnerHasAnswered: Boolean = false
 )
 
 @HiltViewModel
@@ -55,12 +56,16 @@ class DailyQuestionViewModel @Inject constructor(
                 val today = FirestoreAnswerDataSource.todayLocalDateString()
                 val (coupleId, question) = loadCoupleAndQuestion(today)
                 val answer = question?.let { localAnswerRepository.getAnswer(it.id) }
+                val partnerHasAnswered = coupleId?.let {
+                    runCatching { checkPartnerAnswered(it, today) }.getOrDefault(false)
+                } ?: false
                 _uiState.value = LocalQuestionUiState(
                     isLoading = false,
                     question = question,
                     coupleId = coupleId,
                     dailyQuestionDate = today,
-                    pendingScaleValue = defaultScaleValue(question)
+                    pendingScaleValue = defaultScaleValue(question),
+                    partnerHasAnswered = partnerHasAnswered
                 ).withLocalAnswer(answer)
             } catch (e: Exception) {
                 crashReporter.recordException(e)
@@ -189,6 +194,17 @@ class DailyQuestionViewModel @Inject constructor(
         }.onFailure {
             crashReporter.recordException(it)
         }
+        // After submitting, refresh partner-answered status so the reveal button appears
+        // immediately if the partner answered while the user was composing.
+        val partnerHasAnswered = runCatching { checkPartnerAnswered(coupleId, dailyQuestionDate) }.getOrDefault(false)
+        _uiState.update { it.copy(partnerHasAnswered = partnerHasAnswered) }
+    }
+
+    private suspend fun checkPartnerAnswered(coupleId: String, date: String): Boolean {
+        val userId = authRepository.currentUserId ?: return false
+        val couple = runCatching { coupleRepository.getCoupleForUser(userId) }.getOrNull() ?: return false
+        val partnerId = couple.userIds.firstOrNull { it != userId } ?: return false
+        return firestoreAnswerDataSource.getAnswerForUser(coupleId, partnerId, date) != null
     }
 }
 

app/src/main/java/app/closer/ui/questions/LocalQuestionContent.kt

@@ -23,11 +23,15 @@ import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.FilledTonalButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Surface
@@ -71,6 +75,7 @@ fun LocalQuestionContent(
     onSubmit: () -> Unit,
     canSubmit: Boolean,
     onRefresh: (() -> Unit)? = null,
+    onBack: (() -> Unit)? = null,
     modifier: Modifier = Modifier
 ) {
     val background = closerBackgroundBrush()
@@ -89,6 +94,14 @@ fun LocalQuestionContent(
                 .padding(horizontal = 20.dp, vertical = 18.dp),
             verticalArrangement = Arrangement.spacedBy(18.dp)
         ) {
+            if (onBack != null) {
+                IconButton(onClick = onBack) {
+                    Icon(
+                        imageVector = Icons.AutoMirrored.Filled.ArrowBack,
+                        contentDescription = "Back"
+                    )
+                }
+            }
             LocalQuestionHeader(title = title, subtitle = subtitle)
 
             when {