v1.0.16: spinning sync icon, colorful icon, ON_CHANGE fix, notification fix

- Sync icon now rotates (CSS-style spin) in StatusPill, StatusBanner,
  and card sync button whenever status is SYNCING
- Launcher icon redesigned: indigo→violet→cyan gradient background,
  upload arrow fades white→sky-blue, download arrow fades white→violet,
  soft glow ring behind arrows
- Fix ON_CHANGE not triggering: FileWatchService.start() now called
  from AddPairViewModel.save() so pairs created with ON_CHANGE
  immediately begin watching without needing a toggle or reboot
- Fix FileWatch notification hidden: IMPORTANCE_MIN → IMPORTANCE_LOW
  so the "Watching N folders" notification shows in the shade

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

app/src/main/kotlin/com/syncflow/ui/addpair/AddPairViewModel.kt

@@ -1,5 +1,6 @@
 package com.syncflow.ui.addpair
 
+import android.content.Context
 import androidx.lifecycle.SavedStateHandle
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
@@ -7,9 +8,10 @@ import com.syncflow.data.db.CloudAccountDao
 import com.syncflow.data.db.SyncPairDao
 import com.syncflow.data.db.entities.CloudAccountEntity
 import com.syncflow.data.db.entities.SyncPairEntity
-import com.syncflow.data.db.entities.toDomain
 import com.syncflow.domain.model.*
+import com.syncflow.worker.FileWatchService
 import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
 import javax.inject.Inject
@@ -31,7 +33,7 @@ data class AddPairUiState(
     val scheduleType: ScheduleType = ScheduleType.INTERVAL,
     val intervalMinutes: Int = 30,
     val dailyTime: String = "02:00",
-    val weekdays: Int = 0b1111111,           // all 7 days by default
+    val weekdays: Int = 0b1111111,
     // ── Constraints ──────────────────────────────────────────────────────────
     val wifiOnly: Boolean = true,
     val wifiSsid: String = "",
@@ -57,6 +59,7 @@ data class AddPairUiState(
 class AddPairViewModel @Inject constructor(
     private val syncPairDao: SyncPairDao,
     private val accountDao: CloudAccountDao,
+    @ApplicationContext private val context: Context,
     savedState: SavedStateHandle,
 ) : ViewModel() {
 
@@ -147,7 +150,10 @@ class AddPairViewModel @Inject constructor(
                 )
                 if (editPairId == null) syncPairDao.insert(entity) else syncPairDao.update(entity)
             }
-                .onSuccess { _state.update { it.copy(done = true) } }
+                .onSuccess {
+                    if (s.scheduleType == ScheduleType.ON_CHANGE) FileWatchService.start(context)
+                    _state.update { it.copy(done = true) }
+                }
                 .onFailure { e -> _state.update { it.copy(isSaving = false, error = e.message) } }
         }
     }