v1.0.25: multi-select files, unified notification, dark theme, icon redesign

- FilesScreen: long-press enters selection mode, bulk share/delete toolbar, BackHandler
- FilesViewModel: ShareMultiple action, isSelectionMode/selectedCount state, download-to-cache for open/share
- FileWatchService: recursive FileObserver per subdirectory; unified notification updated with sync result via WorkManager flow observation
- SyncWorker: silent flag suppresses notifications when triggered by watcher; emits KEY_RESULT_SUMMARY output data
- Passbolt-inspired dark theme (Red700/Red500 primary, near-black surface)
- App icon: circular AutoSync-style sync arrows (cyan gradient, deep navy background)

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

app/src/main/kotlin/com/syncflow/worker/FileWatchService.kt

@@ -13,7 +13,9 @@ import android.os.Looper
 import android.provider.DocumentsContract
 import androidx.core.app.NotificationCompat
 import androidx.work.ExistingWorkPolicy
+import androidx.work.WorkInfo
 import androidx.work.WorkManager
+import kotlinx.coroutines.flow.first
 import com.syncflow.MainActivity
 import com.syncflow.R
 import com.syncflow.data.db.SyncFileStateDao
@@ -214,9 +216,34 @@ class FileWatchService : Service() {
             val pair = syncPairDao.getById(pairId)
             if (pair == null || !pair.isEnabled) return@launch
             Timber.d("FileWatchService: triggering sync for pair $pairId after debounce")
-            val req = SyncWorker.buildOneTimeRequest(pairId, wifiOnly, chargingOnly)
+
+            val req = SyncWorker.buildOneTimeRequest(pairId, wifiOnly, chargingOnly, silent = true)
             WorkManager.getInstance(applicationContext)
                 .enqueueUniqueWork("onchange_$pairId", ExistingWorkPolicy.KEEP, req)
+
+            // Update notification while sync is in progress
+            updateNotificationDynamic("Syncing: ${pair.name}…")
+
+            // Wait for completion and show result in the persistent notification
+            scope.launch {
+                try {
+                    val info = WorkManager.getInstance(applicationContext)
+                        .getWorkInfoByIdFlow(req.id)
+                        .first { it?.state?.isFinished == true }
+                    val summary = info?.outputData?.getString(SyncWorker.KEY_RESULT_SUMMARY)
+                    val watchCount = fileObservers.keys.size + contentObservers.size
+                    val watching = "Watching $watchCount folder${if (watchCount != 1) "s" else ""}"
+                    if (info?.state == WorkInfo.State.SUCCEEDED && summary != null) {
+                        updateNotificationDynamic("${pair.name}: $summary — $watching")
+                    } else {
+                        updateNotificationDynamic("$watching")
+                    }
+                    delay(12_000)
+                    updateNotificationDynamic(null) // revert to default watching text
+                } catch (_: Exception) {
+                    updateNotificationDynamic(null)
+                }
+            }
         }
     }
 
@@ -241,7 +268,7 @@ class FileWatchService : Service() {
         }
     }
 
-    private fun buildNotification(count: Int): Notification {
+    private fun buildNotification(count: Int, overrideText: String? = null): Notification {
         val tapIntent = PendingIntent.getActivity(
             this, 0,
             Intent(this, MainActivity::class.java).apply { flags = Intent.FLAG_ACTIVITY_SINGLE_TOP },
@@ -250,7 +277,7 @@ class FileWatchService : Service() {
         return NotificationCompat.Builder(this, CHANNEL_WATCH)
             .setContentTitle("SyncFlow")
             .setContentText(
-                if (count > 0) "Watching $count folder${if (count != 1) "s" else ""} for changes"
+                overrideText ?: if (count > 0) "Watching $count folder${if (count != 1) "s" else ""} for changes"
                 else "Starting file watcher…"
             )
             .setSmallIcon(R.drawable.ic_sync)
@@ -264,4 +291,10 @@ class FileWatchService : Service() {
         val nm = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
         nm.notify(NOTIFICATION_ID, buildNotification(count))
     }
+
+    private fun updateNotificationDynamic(overrideText: String?) {
+        val count = fileObservers.keys.size + contentObservers.size
+        val nm = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        nm.notify(NOTIFICATION_ID, buildNotification(count, overrideText))
+    }
 }