v1.0.59: pause/resume sync

New PAUSED status. When a sync is running, the sync button becomes a
pause button (⏸). Tapping it cancels the WorkManager job and sets the
status to PAUSED (purple). The button then becomes a play button (▶) to
resume. Works in both the home screen card and the pair detail screen.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/main/kotlin/com/syncflow/domain/model/SyncPair.kt

@@ -70,5 +70,5 @@ enum class ScheduleType(val label: String) {
 }
 
 enum class SyncStatus {
-    IDLE, SYNCING, SUCCESS, PARTIAL, FAILED, CONFLICT,
+    IDLE, SYNCING, PAUSED, SUCCESS, PARTIAL, FAILED, CONFLICT,
 }

app/src/main/kotlin/com/syncflow/ui/home/HomeScreen.kt

@@ -53,6 +53,7 @@ fun HomeScreen(
                     onClick = { onPairClick(pair.id) },
                     onSync = { vm.triggerSync(pair) },
                     onToggle = { vm.toggleEnabled(pair) },
+                    onPause = { vm.pauseSync(pair) },
                 )
             }
             item { Spacer(Modifier.height(80.dp)) }
@@ -66,6 +67,7 @@ private fun SyncPairCard(
     onClick: () -> Unit,
     onSync: () -> Unit,
     onToggle: () -> Unit,
+    onPause: () -> Unit = {},
 ) {
     val accentColor = pair.lastSyncResult.accentColor
 
@@ -170,13 +172,16 @@ private fun SyncPairCard(
                         animationSpec = infiniteRepeatable(tween(900, easing = LinearEasing)),
                         label = "cardRotation",
                     )
-                    FilledTonalIconButton(onClick = onSync, modifier = Modifier.size(36.dp)) {
-                        Icon(
-                            Icons.Default.Sync, "Sync now",
-                            modifier = Modifier.size(18.dp).graphicsLayer {
-                                if (pair.lastSyncResult == SyncStatus.SYNCING) rotationZ = syncRotation
-                            },
-                        )
+                    when (pair.lastSyncResult) {
+                        SyncStatus.SYNCING -> FilledTonalIconButton(onClick = onPause, modifier = Modifier.size(36.dp)) {
+                            Icon(Icons.Default.Pause, "Pause sync", modifier = Modifier.size(18.dp))
+                        }
+                        SyncStatus.PAUSED -> FilledTonalIconButton(onClick = onSync, modifier = Modifier.size(36.dp)) {
+                            Icon(Icons.Default.PlayArrow, "Resume sync", modifier = Modifier.size(18.dp))
+                        }
+                        else -> FilledTonalIconButton(onClick = onSync, modifier = Modifier.size(36.dp)) {
+                            Icon(Icons.Default.Sync, "Sync now", modifier = Modifier.size(18.dp).graphicsLayer { rotationZ = syncRotation * 0f })
+                        }
                     }
                 }
             }
@@ -189,6 +194,7 @@ private fun StatusPill(status: SyncStatus) {
     val (icon, label) = when (status) {
         SyncStatus.SUCCESS  -> Pair(Icons.Default.CheckCircle, "Synced")
         SyncStatus.SYNCING  -> Pair(Icons.Default.Sync, "Syncing…")
+        SyncStatus.PAUSED   -> Pair(Icons.Default.Pause, "Paused")
         SyncStatus.FAILED   -> Pair(Icons.Default.Error, "Failed")
         SyncStatus.CONFLICT -> Pair(Icons.Default.Warning, "Conflict")
         SyncStatus.PARTIAL  -> Pair(Icons.Default.WarningAmber, "Partial")
@@ -247,11 +253,12 @@ private fun EmptyState(modifier: Modifier = Modifier, onAdd: () -> Unit) {
 
 private val SyncStatus.accentColor: Color
     @Composable get() = when (this) {
-        SyncStatus.SUCCESS  -> Color(0xFF2E7D32)  // green  — done, healthy
-        SyncStatus.SYNCING  -> Color(0xFF1565C0)  // blue   — in progress
-        SyncStatus.FAILED   -> Color(0xFFC62828)  // red    — error
-        SyncStatus.PARTIAL  -> Color(0xFFE65100)  // orange — some files failed
-        SyncStatus.CONFLICT -> Color(0xFFF9A825)  // amber  — needs resolution
+        SyncStatus.SUCCESS  -> Color(0xFF2E7D32)
+        SyncStatus.SYNCING  -> Color(0xFF1565C0)
+        SyncStatus.PAUSED   -> Color(0xFF6A1B9A)
+        SyncStatus.FAILED   -> Color(0xFFC62828)
+        SyncStatus.PARTIAL  -> Color(0xFFE65100)
+        SyncStatus.CONFLICT -> Color(0xFFF9A825)
         SyncStatus.IDLE     -> MaterialTheme.colorScheme.outline
     }
 

app/src/main/kotlin/com/syncflow/ui/home/HomeViewModel.kt

@@ -8,6 +8,7 @@ import androidx.work.WorkManager
 import com.syncflow.data.db.SyncPairDao
 import com.syncflow.data.db.entities.SyncPairEntity
 import com.syncflow.domain.model.ScheduleType
+import com.syncflow.domain.model.SyncStatus
 import com.syncflow.worker.FileWatchService
 import com.syncflow.worker.SyncWorker
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -32,6 +33,11 @@ class HomeViewModel @Inject constructor(
         workManager.enqueue(req)
     }
 
+    fun pauseSync(pair: SyncPairEntity) {
+        workManager.cancelAllWorkByTag("sync_${pair.id}")
+        viewModelScope.launch { syncPairDao.updateStatus(pair.id, SyncStatus.PAUSED) }
+    }
+
     fun toggleEnabled(pair: SyncPairEntity) {
         viewModelScope.launch {
             val nowEnabled = !pair.isEnabled

app/src/main/kotlin/com/syncflow/ui/pairdetail/PairDetailScreen.kt

@@ -66,7 +66,17 @@ fun PairDetailScreen(
                 navigationIcon = { IconButton(onClick = onBack) { Icon(Icons.Default.ArrowBack, "Back") } },
                 actions = {
                     IconButton(onClick = { pair?.let { onEdit(it.id) } }) { Icon(Icons.Default.Edit, "Edit") }
-                    IconButton(onClick = { vm.syncNow() }) { Icon(Icons.Default.Sync, "Sync now") }
+                    when (pair?.lastSyncResult) {
+                        SyncStatus.SYNCING -> IconButton(onClick = { vm.pauseSync() }) {
+                            Icon(Icons.Default.Pause, "Pause sync")
+                        }
+                        SyncStatus.PAUSED -> IconButton(onClick = { vm.syncNow() }) {
+                            Icon(Icons.Default.PlayArrow, "Resume sync")
+                        }
+                        else -> IconButton(onClick = { vm.syncNow() }) {
+                            Icon(Icons.Default.Sync, "Sync now")
+                        }
+                    }
                     IconButton(onClick = { showDelete = true }) { Icon(Icons.Default.Delete, "Delete") }
                 },
             )
@@ -142,6 +152,7 @@ private fun StatusBanner(pair: SyncPairEntity) {
     val (icon, label, containerColor) = when (pair.lastSyncResult) {
         SyncStatus.SUCCESS  -> Triple(Icons.Default.CheckCircle, "Synced",    MaterialTheme.colorScheme.primaryContainer)
         SyncStatus.SYNCING  -> Triple(Icons.Default.Sync,        "Syncing…",  MaterialTheme.colorScheme.secondaryContainer)
+        SyncStatus.PAUSED   -> Triple(Icons.Default.Pause,       "Paused — tap ▶ to resume", MaterialTheme.colorScheme.surfaceVariant)
         SyncStatus.FAILED   -> Triple(Icons.Default.Error,       "Failed",    MaterialTheme.colorScheme.errorContainer)
         SyncStatus.CONFLICT -> Triple(Icons.Default.Warning,     "Conflict",  MaterialTheme.colorScheme.tertiaryContainer)
         SyncStatus.PARTIAL  -> Triple(Icons.Default.WarningAmber,"Partial",   MaterialTheme.colorScheme.tertiaryContainer)

app/src/main/kotlin/com/syncflow/ui/pairdetail/PairDetailViewModel.kt

@@ -7,6 +7,7 @@ import androidx.work.WorkManager
 import com.syncflow.data.db.SyncConflictDao
 import com.syncflow.data.db.SyncEventDao
 import com.syncflow.data.db.SyncPairDao
+import com.syncflow.domain.model.SyncStatus
 import com.syncflow.worker.SyncWorker
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.SharingStarted
@@ -39,6 +40,12 @@ class PairDetailViewModel @Inject constructor(
         workManager.enqueue(SyncWorker.buildOneTimeRequest(p.id, wifiOnly = false, chargingOnly = false))
     }
 
+    fun pauseSync() {
+        val p = pair.value ?: return
+        workManager.cancelAllWorkByTag("sync_${p.id}")
+        viewModelScope.launch { syncPairDao.updateStatus(p.id, SyncStatus.PAUSED) }
+    }
+
     fun delete() {
         viewModelScope.launch {
             pair.value?.let { syncPairDao.delete(it) }