Initial commit — SyncFlow Android file sync app

Supports WebDAV, SFTP, SFTPGo, Nextcloud, ownCloud, Google Drive,
Dropbox, and OneDrive. Credentials encrypted with Android Keystore.
Biometric app-lock, conflict resolution, and auto-sync via WorkManager.

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

app/src/main/kotlin/com/syncflow/data/db/SyncPairDao.kt

@@ -0,0 +1,37 @@
+package com.syncflow.data.db
+
+import androidx.room.*
+import com.syncflow.data.db.entities.SyncPairEntity
+import com.syncflow.domain.model.SyncStatus
+import kotlinx.coroutines.flow.Flow
+import java.time.Instant
+
+@Dao
+interface SyncPairDao {
+    @Query("SELECT * FROM sync_pairs ORDER BY name")
+    fun observeAll(): Flow<List<SyncPairEntity>>
+
+    @Query("SELECT * FROM sync_pairs WHERE isEnabled = 1")
+    suspend fun getEnabled(): List<SyncPairEntity>
+
+    @Query("SELECT * FROM sync_pairs WHERE id = :id")
+    suspend fun getById(id: Long): SyncPairEntity?
+
+    @Query("SELECT * FROM sync_pairs WHERE id = :id")
+    fun observeById(id: Long): Flow<SyncPairEntity?>
+
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    suspend fun insert(entity: SyncPairEntity): Long
+
+    @Update
+    suspend fun update(entity: SyncPairEntity)
+
+    @Delete
+    suspend fun delete(entity: SyncPairEntity)
+
+    @Query("UPDATE sync_pairs SET lastSyncAt = :at, lastSyncResult = :result, pendingConflicts = :conflicts WHERE id = :id")
+    suspend fun updateSyncResult(id: Long, at: Instant, result: SyncStatus, conflicts: Int)
+
+    @Query("UPDATE sync_pairs SET lastSyncResult = :status WHERE id = :id")
+    suspend fun updateStatus(id: Long, status: SyncStatus)
+}