Removed the JSON storage and opted for room database

android/app/build.gradle.kts

@@ -4,6 +4,7 @@ plugins {
     alias(libs.plugins.kotlin.compose)  // v1.5.0: Jetpack Compose Compiler
     alias(libs.plugins.ktlint)  // ✅ v1.6.1: Reaktiviert nach Code-Cleanup
     alias(libs.plugins.detekt)
+    alias(libs.plugins.ksp)
 }
 
 import java.util.Properties
@@ -25,13 +26,13 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
-    
+
     // Disable Google dependency metadata for F-Droid/IzzyOnDroid compatibility
     dependenciesInfo {
         includeInApk = false  // Removes DEPENDENCY_INFO_BLOCK from APK
         includeInBundle = false  // Also disable for AAB (Google Play)
     }
-    
+
     // Product Flavors for F-Droid and standard builds
     // Note: APK splits are disabled to ensure single APK output
     flavorDimensions += "distribution"
@@ -42,7 +43,7 @@ android {
             // All dependencies in this project are already FOSS-compatible
             // No APK splits - F-Droid expects single universal APK
         }
-        
+
         create("standard") {
             dimension = "distribution"
             // Standard builds can include Play Services in the future if needed
@@ -57,7 +58,7 @@ android {
             if (keystorePropertiesFile.exists()) {
                 val keystoreProperties = Properties()
                 keystoreProperties.load(FileInputStream(keystorePropertiesFile))
-                
+
                 storeFile = file(keystoreProperties.getProperty("storeFile"))
                 storePassword = keystoreProperties.getProperty("storePassword")
                 keyAlias = keystoreProperties.getProperty("keyAlias")
@@ -72,11 +73,11 @@ android {
             applicationIdSuffix = ".debug"
             versionNameSuffix = "-debug"
             isDebuggable = true
-            
+
             // Optionales separates Icon-Label für Debug-Builds
             resValue("string", "app_name_debug", "Simple Notes (Debug)")
         }
-        
+
         release {
             isMinifyEnabled = true
             isShrinkResources = true
@@ -98,12 +99,12 @@ android {
         buildConfig = true  // Enable BuildConfig generation
         compose = true  // v1.5.0: Jetpack Compose für Settings Redesign
     }
-    
+
     // v1.7.0: Mock Android framework classes in unit tests (Log, etc.)
     testOptions {
         unitTests.isReturnDefaultValues = true
     }
-    
+
     // v1.5.0 Hotfix: Strong Skipping Mode für bessere 120Hz Performance
     // v1.6.1: Feature ist ab dieser Kotlin/Compose Version bereits Standard
     // composeCompiler { }
@@ -162,6 +163,15 @@ dependencies {
     implementation(libs.androidx.lifecycle.runtime.compose)
     debugImplementation(libs.androidx.compose.ui.tooling)
 
+    // Koin
+    implementation(libs.koin.android)
+    implementation(libs.koin.androidx.compose)
+
+    // Room
+    implementation(libs.room.runtime)
+    implementation(libs.room.ktx)
+    ksp(libs.room.compiler)
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🆕 v1.8.0: Homescreen Widgets
     // ═══════════════════════════════════════════════════════════════════════
@@ -180,7 +190,7 @@ ktlint {
     outputToConsole = true
     ignoreFailures = true  // Parser-Probleme in WebDavSyncService.kt und build.gradle.kts
     enableExperimentalRules = false
-    
+
     filter {
         exclude("**/generated/**")
         exclude("**/build/**")
@@ -196,7 +206,7 @@ detekt {
     allRules = false
     config.setFrom(files("$rootDir/config/detekt/detekt.yml"))
     baseline = file("$rootDir/config/detekt/baseline.xml")
-    
+
     // Parallel-Verarbeitung für schnellere Checks
     parallel = true
 }
@@ -205,13 +215,13 @@ detekt {
 // Single source of truth: F-Droid changelogs are reused in the app
 tasks.register<Copy>("copyChangelogsToAssets") {
     description = "Copies F-Droid changelogs to app assets for post-update dialog"
-    
+
     from("$rootDir/../fastlane/metadata/android") {
         include("*/changelogs/*.txt")
     }
-    
+
     into("$projectDir/src/main/assets/changelogs")
-    
+
     // Preserve directory structure: en-US/20.txt, de-DE/20.txt
     eachFile {
         val parts = relativePath.segments
@@ -222,11 +232,11 @@ tasks.register<Copy>("copyChangelogsToAssets") {
             relativePath = RelativePath(true, parts[0], parts[2])
         }
     }
-    
+
     includeEmptyDirs = false
 }
 
 // Run before preBuild to ensure changelogs are available
 tasks.named("preBuild") {
     dependsOn("copyChangelogsToAssets")
-}
+}

android/app/src/main/AndroidManifest.xml

@@ -5,18 +5,18 @@
     <!-- Network & Sync Permissions -->
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-    
+
     <!-- Notifications -->
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
-    
+
     <!-- Battery Optimization (for WorkManager background sync) -->
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
-    
+
     <!-- v1.7.1: Foreground Service for Expedited Work (Android 9-11) -->
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <!-- v1.7.1: Foreground Service Type for Android 10+ -->
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
-    
+
     <!-- BOOT Permission - CRITICAL für Auto-Sync nach Neustart! -->
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
@@ -44,12 +44,6 @@
             </intent-filter>
         </activity>
 
-        <!-- Legacy MainActivity (XML-based) - kept for reference -->
-        <activity
-            android:name=".MainActivity"
-            android:exported="false"
-            android:theme="@style/Theme.SimpleNotes" />
-
         <!-- Editor Activity (Legacy - XML-based) -->
         <activity
             android:name=".NoteEditorActivity"
@@ -125,4 +119,4 @@
 
     </application>
 
-</manifest>
+</manifest>

android/app/src/main/java/dev/dettmer/simplenotes/MainActivity.kt

@@ -1,856 +0,0 @@
-@file:Suppress("DEPRECATION") // Legacy code using LocalBroadcastManager, will be removed in v2.0.0
-
-package dev.dettmer.simplenotes
-
-import android.Manifest
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import android.content.IntentFilter
-import android.content.pm.PackageManager
-import android.os.Build
-import android.os.Bundle
-import dev.dettmer.simplenotes.utils.Logger
-import android.view.Menu
-import android.view.MenuItem
-import androidx.appcompat.app.AppCompatActivity
-import androidx.localbroadcastmanager.content.LocalBroadcastManager
-import androidx.recyclerview.widget.ItemTouchHelper
-import androidx.recyclerview.widget.LinearLayoutManager
-import androidx.recyclerview.widget.RecyclerView
-import com.google.android.material.appbar.MaterialToolbar
-import com.google.android.material.color.DynamicColors
-import com.google.android.material.floatingactionbutton.FloatingActionButton
-import com.google.android.material.snackbar.Snackbar
-import com.google.android.material.card.MaterialCardView
-import com.google.android.material.dialog.MaterialAlertDialogBuilder
-import dev.dettmer.simplenotes.adapters.NotesAdapter
-import dev.dettmer.simplenotes.models.Note
-import dev.dettmer.simplenotes.storage.NotesStorage
-import dev.dettmer.simplenotes.sync.SyncWorker
-import dev.dettmer.simplenotes.utils.NotificationHelper
-import dev.dettmer.simplenotes.utils.showToast
-import dev.dettmer.simplenotes.utils.Constants
-import android.widget.TextView
-import android.widget.CheckBox
-import android.widget.Toast
-import androidx.lifecycle.lifecycleScope
-import kotlinx.coroutines.launch
-import androidx.lifecycle.lifecycleScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
-import dev.dettmer.simplenotes.sync.WebDavSyncService
-import dev.dettmer.simplenotes.sync.SyncStateManager
-import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-import android.view.View
-import android.widget.LinearLayout
-import android.view.Gravity
-import android.widget.PopupMenu
-import dev.dettmer.simplenotes.models.NoteType
-
-/**
- * Legacy MainActivity - DEPRECATED seit v1.5.0, wird entfernt in v2.0.0
- * Ersetzt durch ComposeMainActivity
- */
-@Suppress("DEPRECATION") // Legacy code using LocalBroadcastManager, will be removed in v2.0.0
-class MainActivity : AppCompatActivity() {
-    
-    private lateinit var recyclerViewNotes: RecyclerView
-    private lateinit var emptyStateCard: MaterialCardView
-    private lateinit var fabAddNote: FloatingActionButton
-    private lateinit var toolbar: MaterialToolbar
-    private lateinit var swipeRefreshLayout: SwipeRefreshLayout
-    
-    // 🔄 v1.3.1: Sync Status Banner
-    private lateinit var syncStatusBanner: LinearLayout
-    private lateinit var syncStatusText: TextView
-    
-    private lateinit var adapter: NotesAdapter
-    private val storage by lazy { NotesStorage(this) }
-    
-    // Menu reference for sync button state
-    private var optionsMenu: Menu? = null
-    
-    // Track pending deletions to prevent flicker when notes reload
-    private val pendingDeletions = mutableSetOf<String>()
-    
-    private val prefs by lazy {
-        getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
-    }
-    
-    companion object {
-        private const val TAG = "MainActivity"
-        private const val REQUEST_NOTIFICATION_PERMISSION = 1001
-        private const val REQUEST_SETTINGS = 1002
-        private const val MIN_AUTO_SYNC_INTERVAL_MS = 60_000L // 1 Minute
-        private const val PREF_LAST_AUTO_SYNC_TIME = "last_auto_sync_timestamp"
-        private const val SYNC_COMPLETED_DELAY_MS = 1500L
-        private const val ERROR_DISPLAY_DELAY_MS = 3000L
-    }
-    
-    /**
-     * BroadcastReceiver für Background-Sync Completion (Periodic Sync)
-     */
-    private val syncCompletedReceiver = object : BroadcastReceiver() {
-        override fun onReceive(context: Context?, intent: Intent?) {
-            val success = intent?.getBooleanExtra("success", false) ?: false
-            val count = intent?.getIntExtra("count", 0) ?: 0
-            
-            Logger.d(TAG, "📡 Sync completed broadcast received: success=$success, count=$count")
-            
-            // UI refresh
-            if (success && count > 0) {
-                loadNotes()
-                Logger.d(TAG, "🔄 Notes reloaded after background sync")
-            }
-        }
-    }
-    
-    override fun onCreate(savedInstanceState: Bundle?) {
-        // Install Splash Screen (Android 12+)
-        installSplashScreen()
-        
-        super.onCreate(savedInstanceState)
-        
-        // Apply Dynamic Colors for Android 12+ (Material You)
-        DynamicColors.applyToActivityIfAvailable(this)
-        
-        setContentView(R.layout.activity_main)
-        
-        // Logger initialisieren und File-Logging aktivieren wenn eingestellt
-        Logger.init(this)
-        if (prefs.getBoolean(Constants.KEY_FILE_LOGGING_ENABLED, false)) {
-            Logger.setFileLoggingEnabled(true)
-        }
-        
-        // Alte Sync-Notifications beim App-Start löschen
-        NotificationHelper.clearSyncNotifications(this)
-        
-        // Permission für Notifications (Android 13+)
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            requestNotificationPermission()
-        }
-        
-        // 🌍 v1.7.2: Debug Locale für Fehlersuche
-        logLocaleInfo()
-        
-        findViews()
-        setupToolbar()
-        setupRecyclerView()
-        setupFab()
-        
-        // v1.4.1: Migrate checklists for backwards compatibility
-        migrateChecklistsForBackwardsCompat()
-        
-        loadNotes()
-        
-        // 🔄 v1.3.1: Observe sync state for UI updates
-        setupSyncStateObserver()
-    }
-    
-    /**
-     * 🔄 v1.3.1: Beobachtet Sync-Status für UI-Feedback
-     */
-    private fun setupSyncStateObserver() {
-        SyncStateManager.syncStatus.observe(this) { status ->
-            when (status.state) {
-                SyncStateManager.SyncState.SYNCING -> {
-                    // Disable sync controls
-                    setSyncControlsEnabled(false)
-                    // 🔄 v1.3.1: Show sync status banner (ersetzt SwipeRefresh-Animation)
-                    syncStatusText.text = getString(R.string.sync_status_syncing)
-                    syncStatusBanner.visibility = View.VISIBLE
-                }
-                SyncStateManager.SyncState.COMPLETED -> {
-                    // Re-enable sync controls
-                    setSyncControlsEnabled(true)
-                    swipeRefreshLayout.isRefreshing = false
-                    // Show completed briefly, then hide
-                    syncStatusText.text = status.message ?: getString(R.string.sync_status_completed)
-                    lifecycleScope.launch {
-                        kotlinx.coroutines.delay(SYNC_COMPLETED_DELAY_MS)
-                        syncStatusBanner.visibility = View.GONE
-                        SyncStateManager.reset()
-                    }
-                }
-                SyncStateManager.SyncState.ERROR -> {
-                    // Re-enable sync controls
-                    setSyncControlsEnabled(true)
-                    swipeRefreshLayout.isRefreshing = false
-                    // Show error briefly, then hide
-                    syncStatusText.text = status.message ?: getString(R.string.sync_status_error)
-                    lifecycleScope.launch {
-                        kotlinx.coroutines.delay(ERROR_DISPLAY_DELAY_MS)
-                        syncStatusBanner.visibility = View.GONE
-                        SyncStateManager.reset()
-                    }
-                }
-                SyncStateManager.SyncState.IDLE -> {
-                    setSyncControlsEnabled(true)
-                    swipeRefreshLayout.isRefreshing = false
-                    syncStatusBanner.visibility = View.GONE
-                }
-                // v1.5.0: Silent-Sync - Banner nicht anzeigen, aber Sync-Controls deaktivieren
-                SyncStateManager.SyncState.SYNCING_SILENT -> {
-                    setSyncControlsEnabled(false)
-                    // Kein Banner anzeigen bei Silent-Sync (z.B. onResume Auto-Sync)
-                }
-            }
-        }
-    }
-    
-    /**
-     * 🔄 v1.3.1: Aktiviert/deaktiviert Sync-Controls (Button + SwipeRefresh)
-     */
-    private fun setSyncControlsEnabled(enabled: Boolean) {
-        // Menu Sync-Button
-        optionsMenu?.findItem(R.id.action_sync)?.isEnabled = enabled
-        // SwipeRefresh
-        swipeRefreshLayout.isEnabled = enabled
-    }
-    
-    override fun onResume() {
-        super.onResume()
-        
-        Logger.d(TAG, "📱 MainActivity.onResume() - Registering receivers")
-        
-        // Register BroadcastReceiver für Background-Sync
-        LocalBroadcastManager.getInstance(this).registerReceiver(
-            syncCompletedReceiver,
-            IntentFilter(SyncWorker.ACTION_SYNC_COMPLETED)
-        )
-        
-        Logger.d(TAG, "📡 BroadcastReceiver registered (sync-completed)")
-        
-        // Reload notes (scroll to top wird in loadNotes() gemacht)
-        loadNotes()
-        
-        // Trigger Auto-Sync beim App-Wechsel in Vordergrund (Toast)
-        triggerAutoSync("onResume")
-    }
-    
-    /**
-     * Automatischer Sync (onResume)
-     * - Nutzt WiFi-gebundenen Socket (VPN Fix!)
-     * - Nur Success-Toast (kein "Auto-Sync..." Toast)
-     * 
-     * NOTE: WiFi-Connect Sync nutzt WorkManager (auch wenn App geschlossen!)
-     * v1.5.0: Silent-Sync - kein Banner während des Syncs, Fehler werden trotzdem angezeigt
-     */
-    private fun triggerAutoSync(source: String = "unknown") {
-        // Throttling: Max 1 Sync pro Minute
-        if (!canTriggerAutoSync()) {
-            return
-        }
-        
-        // 🔄 v1.3.1: Check if sync already running
-        // v1.5.0: silent=true - kein Banner bei Auto-Sync
-        if (!SyncStateManager.tryStartSync("auto-$source", silent = true)) {
-            Logger.d(TAG, "⏭️ Auto-sync ($source): Another sync already in progress")
-            return
-        }
-        
-        Logger.d(TAG, "🔄 Auto-sync triggered ($source)")
-        
-        // Update last sync timestamp
-        prefs.edit().putLong(PREF_LAST_AUTO_SYNC_TIME, System.currentTimeMillis()).apply()
-        
-        lifecycleScope.launch {
-            try {
-                val syncService = WebDavSyncService(this@MainActivity)
-                
-                // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
-                if (!syncService.hasUnsyncedChanges()) {
-                    Logger.d(TAG, "⏭️ Auto-sync ($source): No unsynced changes - skipping")
-                    SyncStateManager.reset()
-                    return@launch
-                }
-                
-                // ⭐ WICHTIG: Server-Erreichbarkeits-Check VOR Sync (wie in SyncWorker)
-                val isReachable = withContext(Dispatchers.IO) {
-                    syncService.isServerReachable()
-                }
-                
-                if (!isReachable) {
-                    Logger.d(TAG, "⏭️ Auto-sync ($source): Server not reachable - skipping silently")
-                    SyncStateManager.reset()
-                    return@launch
-                }
-                
-                // Server ist erreichbar → Sync durchführen
-                val result = withContext(Dispatchers.IO) {
-                    syncService.syncNotes()
-                }
-                
-                // Feedback abhängig von Source
-                if (result.isSuccess && result.syncedCount > 0) {
-                    Logger.d(TAG, "✅ Auto-sync successful ($source): ${result.syncedCount} notes")
-                    SyncStateManager.markCompleted("${result.syncedCount} Notizen")
-                    
-                    // onResume: Nur Success-Toast
-                    showToast("✅ Gesynct: ${result.syncedCount} Notizen")
-                    loadNotes()
-                    
-                } else if (result.isSuccess) {
-                    Logger.d(TAG, "ℹ️ Auto-sync ($source): No changes")
-                    SyncStateManager.markCompleted()
-                    
-                } else {
-                    Logger.e(TAG, "❌ Auto-sync failed ($source): ${result.errorMessage}")
-                    SyncStateManager.markError(result.errorMessage)
-                    // Kein Toast - App ist im Hintergrund
-                }
-                
-            } catch (e: Exception) {
-                Logger.e(TAG, "💥 Auto-sync exception ($source): ${e.message}")
-                SyncStateManager.markError(e.message)
-                // Kein Toast - App ist im Hintergrund
-            }
-        }
-    }
-    
-    /**
-     * Prüft ob Auto-Sync getriggert werden darf (Throttling)
-     */
-    private fun canTriggerAutoSync(): Boolean {
-        val lastSyncTime = prefs.getLong(PREF_LAST_AUTO_SYNC_TIME, 0)
-        val now = System.currentTimeMillis()
-        val timeSinceLastSync = now - lastSyncTime
-        
-        if (timeSinceLastSync < MIN_AUTO_SYNC_INTERVAL_MS) {
-            val remainingSeconds = (MIN_AUTO_SYNC_INTERVAL_MS - timeSinceLastSync) / 1000
-            Logger.d(TAG, "⏳ Auto-sync throttled - wait ${remainingSeconds}s")
-            return false
-        }
-        
-        return true
-    }
-    
-    override fun onPause() {
-        super.onPause()
-        
-        // Unregister BroadcastReceiver
-        LocalBroadcastManager.getInstance(this).unregisterReceiver(syncCompletedReceiver)
-        Logger.d(TAG, "📡 BroadcastReceiver unregistered")
-    }
-    
-    private fun findViews() {
-        recyclerViewNotes = findViewById(R.id.recyclerViewNotes)
-        emptyStateCard = findViewById(R.id.emptyStateCard)
-        fabAddNote = findViewById(R.id.fabAddNote)
-        toolbar = findViewById(R.id.toolbar)
-        swipeRefreshLayout = findViewById<SwipeRefreshLayout>(R.id.swipeRefreshLayout)
-        
-        // 🔄 v1.3.1: Sync Status Banner
-        syncStatusBanner = findViewById(R.id.syncStatusBanner)
-        syncStatusText = findViewById(R.id.syncStatusText)
-    }
-    
-    private fun setupToolbar() {
-        setSupportActionBar(toolbar)
-    }
-    
-    private fun setupRecyclerView() {
-        adapter = NotesAdapter { note ->
-            openNoteEditor(note.id)
-        }
-        recyclerViewNotes.adapter = adapter
-        recyclerViewNotes.layoutManager = LinearLayoutManager(this)
-        
-        // 🔥 v1.1.2: Setup Pull-to-Refresh
-        setupPullToRefresh()
-        
-        // Setup Swipe-to-Delete
-        setupSwipeToDelete()
-    }
-    
-    /**
-     * Setup Pull-to-Refresh für manuellen Sync (v1.1.2)
-     */
-    private fun setupPullToRefresh() {
-        swipeRefreshLayout.setOnRefreshListener {
-            Logger.d(TAG, "🔄 Pull-to-Refresh triggered - starting manual sync")
-            
-            // 🔄 v1.3.1: Check if sync already running (Banner zeigt Status)
-            if (!SyncStateManager.tryStartSync("pullToRefresh")) {
-                swipeRefreshLayout.isRefreshing = false
-                return@setOnRefreshListener
-            }
-            
-            lifecycleScope.launch {
-                try {
-                    val prefs = getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
-                    val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
-                    
-                    if (serverUrl.isNullOrEmpty()) {
-                        showToast("⚠️ Server noch nicht konfiguriert")
-                        SyncStateManager.reset()
-                        return@launch
-                    }
-                    
-                    val syncService = WebDavSyncService(this@MainActivity)
-                    
-                    // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
-                    if (!syncService.hasUnsyncedChanges()) {
-                        Logger.d(TAG, "⏭️ No unsynced changes, skipping server reachability check")
-                        SyncStateManager.markCompleted(getString(R.string.snackbar_already_synced))
-                        return@launch
-                    }
-                    
-                    // Check if server is reachable
-                    if (!syncService.isServerReachable()) {
-                        SyncStateManager.markError(getString(R.string.snackbar_server_unreachable))
-                        return@launch
-                    }
-                    
-                    // Perform sync
-                    val result = syncService.syncNotes()
-                    
-                    if (result.isSuccess) {
-                        SyncStateManager.markCompleted(getString(R.string.snackbar_synced_count, result.syncedCount))
-                        loadNotes()
-                    } else {
-                        SyncStateManager.markError(result.errorMessage)
-                    }
-                } catch (e: Exception) {
-                    Logger.e(TAG, "Pull-to-Refresh sync failed", e)
-                    SyncStateManager.markError(e.message)
-                }
-            }
-        }
-        
-        // Set Material 3 color scheme
-        swipeRefreshLayout.setColorSchemeResources(
-            com.google.android.material.R.color.material_dynamic_primary50
-        )
-    }
-    
-    private fun setupSwipeToDelete() {
-        val itemTouchHelper = ItemTouchHelper(object : ItemTouchHelper.SimpleCallback(
-            0, // No drag
-            ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT // Swipe left or right
-        ) {
-            override fun onMove(
-                recyclerView: RecyclerView,
-                viewHolder: RecyclerView.ViewHolder,
-                target: RecyclerView.ViewHolder
-            ): Boolean = false
-            
-            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
-                val position = viewHolder.bindingAdapterPosition
-                val swipedNote = adapter.currentList[position]
-                
-                // Store original list BEFORE removing note
-                val originalList = adapter.currentList.toList()
-                
-                // Remove from list for visual feedback (NOT from storage yet!)
-                val listWithoutNote = originalList.toMutableList().apply {
-                    removeAt(position)
-                }
-                adapter.submitList(listWithoutNote)
-                
-                // Show dialog with ability to restore
-                showServerDeletionDialog(swipedNote, originalList)
-            }
-            
-            override fun getSwipeThreshold(viewHolder: RecyclerView.ViewHolder): Float {
-                // Require 80% swipe to trigger
-                return 0.8f
-            }
-        })
-        
-        itemTouchHelper.attachToRecyclerView(recyclerViewNotes)
-    }
-    
-    private fun showServerDeletionDialog(note: Note, originalList: List<Note>) {
-        val alwaysDeleteFromServer = prefs.getBoolean(Constants.KEY_ALWAYS_DELETE_FROM_SERVER, false)
-        
-        if (alwaysDeleteFromServer) {
-            // Auto-delete from server without asking
-            deleteNoteLocally(note, deleteFromServer = true)
-            return
-        }
-        
-        val dialogView = layoutInflater.inflate(R.layout.dialog_server_deletion, null)
-        val checkboxAlways = dialogView.findViewById<CheckBox>(R.id.checkboxAlwaysDeleteFromServer)
-        
-        MaterialAlertDialogBuilder(this)
-            .setTitle(getString(R.string.legacy_delete_dialog_title))
-            .setMessage(getString(R.string.legacy_delete_dialog_message, note.title))
-            .setView(dialogView)
-            .setNeutralButton(getString(R.string.cancel)) { _, _ ->
-                // RESTORE: Re-submit original list (note is NOT deleted from storage)
-                adapter.submitList(originalList)
-            }
-            .setOnCancelListener {
-                // User pressed back - also restore
-                adapter.submitList(originalList)
-            }
-            .setPositiveButton("Nur lokal") { _, _ ->
-                if (checkboxAlways.isChecked) {
-                    prefs.edit().putBoolean(Constants.KEY_ALWAYS_DELETE_FROM_SERVER, false).apply()
-                }
-                // NOW actually delete from storage
-                deleteNoteLocally(note, deleteFromServer = false)
-            }
-            .setNegativeButton(getString(R.string.legacy_delete_from_server)) { _, _ ->
-                if (checkboxAlways.isChecked) {
-                    prefs.edit().putBoolean(Constants.KEY_ALWAYS_DELETE_FROM_SERVER, true).apply()
-                }
-                deleteNoteLocally(note, deleteFromServer = true)
-            }
-            .setCancelable(true)
-            .show()
-    }
-    
-    private fun deleteNoteLocally(note: Note, deleteFromServer: Boolean) {
-        // Track pending deletion to prevent flicker
-        pendingDeletions.add(note.id)
-        
-        // Delete from storage
-        storage.deleteNote(note.id)
-        
-        // Reload to reflect changes
-        loadNotes()
-        
-        // Show Snackbar with UNDO option
-        val message = if (deleteFromServer) {
-            getString(R.string.legacy_delete_with_server, note.title)
-        } else {
-            getString(R.string.legacy_delete_local_only, note.title)
-        }
-        
-        Snackbar.make(recyclerViewNotes, message, Snackbar.LENGTH_LONG)
-            .setAction(getString(R.string.snackbar_undo)) {
-                // UNDO: Restore note
-                storage.saveNote(note)
-                pendingDeletions.remove(note.id)
-                loadNotes()
-            }
-            .addCallback(object : Snackbar.Callback() {
-                override fun onDismissed(transientBottomBar: Snackbar?, event: Int) {
-                    if (event != DISMISS_EVENT_ACTION) {
-                        // Snackbar dismissed without UNDO
-                        pendingDeletions.remove(note.id)
-                        
-                        // Delete from server if requested
-                        if (deleteFromServer) {
-                            lifecycleScope.launch {
-                                try {
-                                    val webdavService = WebDavSyncService(this@MainActivity)
-                                    val success = webdavService.deleteNoteFromServer(note.id)
-                                    if (success) {
-                                        runOnUiThread {
-                                            Toast.makeText(
-                                                this@MainActivity,
-                                                getString(R.string.snackbar_deleted_from_server),
-                                                Toast.LENGTH_SHORT
-                                            ).show()
-                                        }
-                                    } else {
-                                        runOnUiThread {
-                                            Toast.makeText(
-                                                this@MainActivity,
-                                                getString(R.string.snackbar_server_delete_failed),
-                                                Toast.LENGTH_LONG
-                                            ).show()
-                                        }
-                                    }
-                                } catch (e: Exception) {
-                                    runOnUiThread {
-                                        Toast.makeText(
-                                            this@MainActivity,
-                                            "Server-Fehler: ${e.message}",
-                                            Toast.LENGTH_LONG
-                                        ).show()
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }).show()
-    }
-    
-    /**
-     * v1.4.0: Setup FAB mit Dropdown für Notiz-Typ Auswahl
-     */
-    private fun setupFab() {
-        fabAddNote.setOnClickListener { view ->
-            showNoteTypePopup(view)
-        }
-    }
-    
-    /**
-     * v1.4.0: Zeigt Popup-Menü zur Auswahl des Notiz-Typs
-     */
-    private fun showNoteTypePopup(anchor: View) {
-        val popupMenu = PopupMenu(this, anchor, Gravity.END)
-        popupMenu.inflate(R.menu.menu_fab_note_types)
-        
-        // Icons im Popup anzeigen (via Reflection, da standardmäßig ausgeblendet)
-        try {
-            val fields = popupMenu.javaClass.declaredFields
-            for (field in fields) {
-                if ("mPopup" == field.name) {
-                    field.isAccessible = true
-                    val menuPopupHelper = field.get(popupMenu)
-                    val classPopupHelper = Class.forName(menuPopupHelper.javaClass.name)
-                    val setForceIcons = classPopupHelper.getMethod("setForceShowIcon", Boolean::class.java)
-                    setForceIcons.invoke(menuPopupHelper, true)
-                    break
-                }
-            }
-        } catch (e: Exception) {
-            Logger.w(TAG, "Could not force show icons in popup menu: ${e.message}")
-        }
-        
-        popupMenu.setOnMenuItemClickListener { menuItem ->
-            val noteType = when (menuItem.itemId) {
-                R.id.action_create_text_note -> NoteType.TEXT
-                R.id.action_create_checklist -> NoteType.CHECKLIST
-                else -> return@setOnMenuItemClickListener false
-            }
-            
-            val intent = Intent(this, NoteEditorActivity::class.java)
-            intent.putExtra(NoteEditorActivity.EXTRA_NOTE_TYPE, noteType.name)
-            startActivity(intent)
-            true
-        }
-        
-        popupMenu.show()
-    }
-    
-    private fun loadNotes() {
-        val notes = storage.loadAllNotes()
-        
-        // Filter out notes that are pending deletion (prevent flicker)
-        val filteredNotes = notes.filter { it.id !in pendingDeletions }
-        
-        // Submit list with callback to scroll to top after list is updated
-        adapter.submitList(filteredNotes) {
-            // Scroll to top after list update is complete
-            // Wichtig: Nach dem Erstellen/Bearbeiten einer Notiz
-            if (filteredNotes.isNotEmpty()) {
-                recyclerViewNotes.scrollToPosition(0)
-            }
-        }
-        
-        // Material 3 Empty State Card
-        emptyStateCard.visibility = if (filteredNotes.isEmpty()) {
-            android.view.View.VISIBLE
-        } else {
-            android.view.View.GONE
-        }
-    }
-    
-    private fun openNoteEditor(noteId: String?) {
-        val intent = Intent(this, NoteEditorActivity::class.java)
-        noteId?.let {
-            intent.putExtra(NoteEditorActivity.EXTRA_NOTE_ID, it)
-        }
-        startActivity(intent)
-    }
-    
-    private fun openSettings() {
-        // v1.5.0: Use new Jetpack Compose Settings
-        val intent = Intent(this, dev.dettmer.simplenotes.ui.settings.ComposeSettingsActivity::class.java)
-        @Suppress("DEPRECATION")
-        startActivityForResult(intent, REQUEST_SETTINGS)
-    }
-    
-    private fun triggerManualSync() {
-        // 🔄 v1.3.1: Check if sync already running (Banner zeigt Status)
-        if (!SyncStateManager.tryStartSync("manual")) {
-            return
-        }
-        
-        lifecycleScope.launch {
-            try {
-                // Create sync service
-                val syncService = WebDavSyncService(this@MainActivity)
-                
-                // 🔥 v1.1.2: Check if there are unsynced changes first (performance optimization)
-                if (!syncService.hasUnsyncedChanges()) {
-                    Logger.d(TAG, "⏭️ Manual Sync: No unsynced changes - skipping")
-                    val message = getString(R.string.toast_already_synced)
-                    SyncStateManager.markCompleted(message)
-                    return@launch
-                }
-                
-                // ⭐ WICHTIG: Server-Erreichbarkeits-Check VOR Sync (wie in SyncWorker)
-                val isReachable = withContext(Dispatchers.IO) {
-                    syncService.isServerReachable()
-                }
-                
-                if (!isReachable) {
-                    Logger.d(TAG, "⏭️ Manual Sync: Server not reachable - aborting")
-                    SyncStateManager.markError(getString(R.string.snackbar_server_unreachable))
-                    return@launch
-                }
-                
-                // Server ist erreichbar → Sync durchführen
-                val result = withContext(Dispatchers.IO) {
-                    syncService.syncNotes()
-                }
-                
-                // Show result
-                if (result.isSuccess) {
-                    SyncStateManager.markCompleted("${result.syncedCount} Notizen")
-                    loadNotes() // Reload notes
-                } else {
-                    SyncStateManager.markError(result.errorMessage)
-                }
-                
-            } catch (e: Exception) {
-                SyncStateManager.markError(e.message)
-            }
-        }
-    }
-    
-    override fun onCreateOptionsMenu(menu: Menu): Boolean {
-        menuInflater.inflate(R.menu.menu_main, menu)
-        optionsMenu = menu  // 🔄 v1.3.1: Store reference for sync button state
-        return true
-    }
-    
-    override fun onOptionsItemSelected(item: MenuItem): Boolean {
-        return when (item.itemId) {
-            R.id.action_settings -> {
-                openSettings()
-                true
-            }
-            R.id.action_sync -> {
-                triggerManualSync()
-                true
-            }
-            else -> super.onOptionsItemSelected(item)
-        }
-    }
-    
-    private fun requestNotificationPermission() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            if (checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS) 
-                != PackageManager.PERMISSION_GRANTED) {
-                requestPermissions(
-                    arrayOf(Manifest.permission.POST_NOTIFICATIONS),
-                    REQUEST_NOTIFICATION_PERMISSION
-                )
-            }
-        }
-    }
-    
-    @Deprecated("Deprecated in Java")
-    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-        super.onActivityResult(requestCode, resultCode, data)
-        
-        if (requestCode == REQUEST_SETTINGS && resultCode == RESULT_OK) {
-            // Restore was successful, reload notes
-            loadNotes()
-        }
-    }
-    
-    /**
-     * v1.4.1: Migriert bestehende Checklisten für Abwärtskompatibilität.
-     * 
-     * Problem: v1.4.0 Checklisten haben leeren "content", was auf älteren
-     * App-Versionen (v1.3.x) als leere Notiz angezeigt wird.
-     * 
-     * Lösung: Alle Checklisten ohne Fallback-Content als PENDING markieren,
-     * damit sie beim nächsten Sync mit Fallback-Content hochgeladen werden.
-     * 
-     * TODO: Diese Migration kann entfernt werden, sobald v1.4.0 nicht mehr
-     * im Umlauf ist (ca. 6 Monate nach v1.4.1 Release, also ~Juli 2026).
-     * Tracking: https://github.com/inventory69/simple-notes-sync/issues/XXX
-     */
-    private fun migrateChecklistsForBackwardsCompat() {
-        val migrationKey = "v1.4.1_checklist_migration_done"
-        
-        // Nur einmal ausführen
-        if (prefs.getBoolean(migrationKey, false)) {
-            return
-        }
-        
-        val allNotes = storage.loadAllNotes()
-        val checklistsToMigrate = allNotes.filter { note ->
-            note.noteType == NoteType.CHECKLIST && 
-            note.content.isBlank() &&
-            note.checklistItems?.isNotEmpty() == true
-        }
-        
-        if (checklistsToMigrate.isNotEmpty()) {
-            Logger.d(TAG, "🔄 v1.4.1 Migration: Found ${checklistsToMigrate.size} checklists without fallback content")
-            
-            for (note in checklistsToMigrate) {
-                // Als PENDING markieren, damit beim nächsten Sync der Fallback-Content 
-                // generiert und hochgeladen wird
-                val updatedNote = note.copy(
-                    syncStatus = dev.dettmer.simplenotes.models.SyncStatus.PENDING
-                )
-                storage.saveNote(updatedNote)
-                Logger.d(TAG, "   📝 Marked for re-sync: ${note.title}")
-            }
-            
-            Logger.d(TAG, "✅ v1.4.1 Migration: ${checklistsToMigrate.size} checklists marked for re-sync")
-        }
-        
-        // Migration als erledigt markieren
-        prefs.edit().putBoolean(migrationKey, true).apply()
-    }
-    
-    override fun onRequestPermissionsResult(
-        requestCode: Int,
-        permissions: Array<out String>,
-        grantResults: IntArray
-    ) {
-        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
-        
-        when (requestCode) {
-            REQUEST_NOTIFICATION_PERMISSION -> {
-                if (grantResults.isNotEmpty() && 
-                    grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                    showToast(getString(R.string.toast_notifications_enabled))
-                } else {
-                    showToast(getString(R.string.toast_notifications_disabled))
-                }
-            }
-        }
-    }
-    
-    /**
-     * 🌍 v1.7.2: Debug-Logging für Locale-Problem
-     * Hilft zu identifizieren warum deutsche Strings trotz englischer App angezeigt werden
-     */
-    private fun logLocaleInfo() {
-        if (!BuildConfig.DEBUG) return
-        
-        Logger.d(TAG, "╔═══════════════════════════════════════════════════")
-        Logger.d(TAG, "║ 🌍 LOCALE DEBUG INFO")
-        Logger.d(TAG, "╠═══════════════════════════════════════════════════")
-        
-        // System Locale
-        val systemLocale = java.util.Locale.getDefault()
-        Logger.d(TAG, "║ System Locale (Locale.getDefault()): $systemLocale")
-        
-        // Resources Locale
-        val resourcesLocale = resources.configuration.locales[0]
-        Logger.d(TAG, "║ Resources Locale: $resourcesLocale")
-        
-        // Context Locale (API 24+)
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-            val contextLocales = resources.configuration.locales
-            Logger.d(TAG, "║ Context Locales (all): $contextLocales")
-        }
-        
-        // Test String Loading
-        val testString = getString(R.string.toast_already_synced)
-        Logger.d(TAG, "║ Test: getString(R.string.toast_already_synced)")
-        Logger.d(TAG, "║ Result: '$testString'")
-        Logger.d(TAG, "║ Expected EN: '✅ Already synced'")
-        Logger.d(TAG, "║ Is German?: ${testString.contains("Bereits") || testString.contains("synchronisiert")}")
-        
-        Logger.d(TAG, "╚═══════════════════════════════════════════════════")
-    }
-}

android/app/src/main/java/dev/dettmer/simplenotes/NoteEditorActivity.kt

@@ -7,6 +7,7 @@ import android.view.View
 import android.widget.LinearLayout
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -24,14 +25,17 @@ import dev.dettmer.simplenotes.storage.NotesStorage
 import dev.dettmer.simplenotes.utils.DeviceIdGenerator
 import dev.dettmer.simplenotes.utils.Logger
 import dev.dettmer.simplenotes.utils.showToast
+import kotlinx.coroutines.launch
+import org.koin.android.ext.android.inject
+import org.koin.java.KoinJavaComponent
 
 /**
  * Editor Activity für Notizen und Checklisten
- * 
+ *
  * v1.4.0: Unterstützt jetzt sowohl TEXT als auch CHECKLIST Notizen
  */
 class NoteEditorActivity : AppCompatActivity() {
-    
+
     // Views
     private lateinit var toolbar: MaterialToolbar
     private lateinit var tilTitle: TextInputLayout
@@ -41,38 +45,36 @@ class NoteEditorActivity : AppCompatActivity() {
     private lateinit var checklistContainer: LinearLayout
     private lateinit var rvChecklistItems: RecyclerView
     private lateinit var btnAddItem: MaterialButton
-    
-    private lateinit var storage: NotesStorage
-    
+
     // State
     private var existingNote: Note? = null
     private var currentNoteType: NoteType = NoteType.TEXT
     private val checklistItems = mutableListOf<ChecklistItem>()
     private var checklistAdapter: ChecklistEditorAdapter? = null
     private var itemTouchHelper: ItemTouchHelper? = null
-    
+
     companion object {
         private const val TAG = "NoteEditorActivity"
         const val EXTRA_NOTE_ID = "extra_note_id"
         const val EXTRA_NOTE_TYPE = "extra_note_type"
     }
-    
+
+    private val storage: NotesStorage by KoinJavaComponent.inject(NotesStorage::class.java)
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        
+
         // Apply Dynamic Colors for Android 12+ (Material You)
         DynamicColors.applyToActivityIfAvailable(this)
-        
+
         setContentView(R.layout.activity_editor)
-        
-        storage = NotesStorage(this)
-        
+
         findViews()
         setupToolbar()
         loadNoteOrDetermineType()
         setupUIForNoteType()
     }
-    
+
     private fun findViews() {
         toolbar = findViewById(R.id.toolbar)
         tilTitle = findViewById(R.id.tilTitle)
@@ -83,33 +85,36 @@ class NoteEditorActivity : AppCompatActivity() {
         rvChecklistItems = findViewById(R.id.rvChecklistItems)
         btnAddItem = findViewById(R.id.btnAddItem)
     }
-    
+
     private fun setupToolbar() {
         setSupportActionBar(toolbar)
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
     }
-    
+
     private fun loadNoteOrDetermineType() {
         val noteId = intent.getStringExtra(EXTRA_NOTE_ID)
-        
+
         if (noteId != null) {
-            // Existierende Notiz laden
-            existingNote = storage.loadNote(noteId)
-            existingNote?.let { note ->
-                editTextTitle.setText(note.title)
-                currentNoteType = note.noteType
-                
-                when (note.noteType) {
-                    NoteType.TEXT -> {
-                        editTextContent.setText(note.content)
-                        supportActionBar?.title = getString(R.string.edit_note)
-                    }
-                    NoteType.CHECKLIST -> {
-                        note.checklistItems?.let { items ->
-                            checklistItems.clear()
-                            checklistItems.addAll(items.sortedBy { it.order })
+
+            lifecycleScope.launch {
+                // Existierende Notiz laden
+                existingNote = storage.loadNote(noteId)
+                existingNote?.let { note ->
+                    editTextTitle.setText(note.title)
+                    currentNoteType = note.noteType
+
+                    when (note.noteType) {
+                        NoteType.TEXT -> {
+                            editTextContent.setText(note.content)
+                            supportActionBar?.title = getString(R.string.edit_note)
+                        }
+                        NoteType.CHECKLIST -> {
+                            note.checklistItems?.let { items ->
+                                checklistItems.clear()
+                                checklistItems.addAll(items.sortedBy { it.order })
+                            }
+                            supportActionBar?.title = getString(R.string.edit_checklist)
                         }
-                        supportActionBar?.title = getString(R.string.edit_checklist)
                     }
                 }
             }
@@ -122,7 +127,7 @@ class NoteEditorActivity : AppCompatActivity() {
                 Logger.w(TAG, "Invalid note type '$typeString', defaulting to TEXT: ${e.message}")
                 NoteType.TEXT
             }
-            
+
             when (currentNoteType) {
                 NoteType.TEXT -> {
                     supportActionBar?.title = getString(R.string.new_note)
@@ -135,7 +140,7 @@ class NoteEditorActivity : AppCompatActivity() {
             }
         }
     }
-    
+
     private fun setupUIForNoteType() {
         when (currentNoteType) {
             NoteType.TEXT -> {
@@ -149,7 +154,7 @@ class NoteEditorActivity : AppCompatActivity() {
             }
         }
     }
-    
+
     private fun setupChecklistRecyclerView() {
         checklistAdapter = ChecklistEditorAdapter(
             items = checklistItems,
@@ -173,12 +178,12 @@ class NoteEditorActivity : AppCompatActivity() {
                 itemTouchHelper?.startDrag(viewHolder)
             }
         )
-        
+
         rvChecklistItems.apply {
             layoutManager = LinearLayoutManager(this@NoteEditorActivity)
             adapter = checklistAdapter
         }
-        
+
         // Drag & Drop Setup
         val callback = object : ItemTouchHelper.SimpleCallback(
             ItemTouchHelper.UP or ItemTouchHelper.DOWN,
@@ -194,48 +199,48 @@ class NoteEditorActivity : AppCompatActivity() {
                 checklistAdapter?.moveItem(from, to)
                 return true
             }
-            
+
             override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
                 // Nicht verwendet
             }
-            
+
             override fun isLongPressDragEnabled(): Boolean = false // Nur via Handle
         }
-        
+
         itemTouchHelper = ItemTouchHelper(callback)
         itemTouchHelper?.attachToRecyclerView(rvChecklistItems)
-        
+
         // Add Item Button
         btnAddItem.setOnClickListener {
             addChecklistItemAt(checklistItems.size)
         }
     }
-    
+
     private fun addChecklistItemAt(position: Int) {
         val newItem = ChecklistItem.createEmpty(position)
         checklistAdapter?.insertItem(position, newItem)
-        
+
         // Zum neuen Item scrollen und fokussieren
         rvChecklistItems.scrollToPosition(position)
         checklistAdapter?.focusItem(rvChecklistItems, position)
     }
-    
+
     private fun deleteChecklistItem(position: Int) {
         checklistAdapter?.removeItem(position)
-        
+
         // Wenn letztes Item gelöscht, automatisch neues hinzufügen
         if (checklistItems.isEmpty()) {
             addChecklistItemAt(0)
         }
     }
-    
+
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_editor, menu)
         // Delete nur für existierende Notizen
         menu.findItem(R.id.action_delete)?.isVisible = existingNote != null
         return true
     }
-    
+
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             android.R.id.home -> {
@@ -253,19 +258,19 @@ class NoteEditorActivity : AppCompatActivity() {
             else -> super.onOptionsItemSelected(item)
         }
     }
-    
+
     private fun saveNote() {
         val title = editTextTitle.text?.toString()?.trim() ?: ""
-        
+
         when (currentNoteType) {
             NoteType.TEXT -> {
                 val content = editTextContent.text?.toString()?.trim() ?: ""
-                
+
                 if (title.isEmpty() && content.isEmpty()) {
                     showToast(getString(R.string.note_is_empty))
                     return
                 }
-                
+
                 val note = if (existingNote != null) {
                     existingNote!!.copy(
                         title = title,
@@ -285,24 +290,24 @@ class NoteEditorActivity : AppCompatActivity() {
                         syncStatus = SyncStatus.LOCAL_ONLY
                     )
                 }
-                
-                storage.saveNote(note)
+
+                lifecycleScope.launch { storage.saveNote(note) }
             }
-            
+
             NoteType.CHECKLIST -> {
                 // Leere Items filtern
                 val validItems = checklistItems.filter { it.text.isNotBlank() }
-                
+
                 if (title.isEmpty() && validItems.isEmpty()) {
                     showToast(getString(R.string.note_is_empty))
                     return
                 }
-                
+
                 // Order neu setzen
                 val orderedItems = validItems.mapIndexed { index, item ->
                     item.copy(order = index)
                 }
-                
+
                 val note = if (existingNote != null) {
                     existingNote!!.copy(
                         title = title,
@@ -322,15 +327,15 @@ class NoteEditorActivity : AppCompatActivity() {
                         syncStatus = SyncStatus.LOCAL_ONLY
                     )
                 }
-                
-                storage.saveNote(note)
+
+                lifecycleScope.launch { storage.saveNote(note) }
             }
         }
-        
+
         showToast(getString(R.string.note_saved))
         finish()
     }
-    
+
     private fun confirmDelete() {
         AlertDialog.Builder(this)
             .setTitle(getString(R.string.delete_note_title))
@@ -341,10 +346,10 @@ class NoteEditorActivity : AppCompatActivity() {
             .setNegativeButton(getString(R.string.cancel), null)
             .show()
     }
-    
+
     private fun deleteNote() {
         existingNote?.let {
-            storage.deleteNote(it.id)
+            lifecycleScope.launch { storage.deleteNote(it.id) }
             showToast(getString(R.string.note_deleted))
             finish()
         }

android/app/src/main/java/dev/dettmer/simplenotes/SimpleNotesApplication.kt

@@ -6,18 +6,22 @@ import dev.dettmer.simplenotes.utils.Logger
 import dev.dettmer.simplenotes.sync.NetworkMonitor
 import dev.dettmer.simplenotes.utils.NotificationHelper
 import dev.dettmer.simplenotes.utils.Constants
+import dev.dettmer.simplenotes.di.appModule
+import org.koin.android.ext.koin.androidContext
+import org.koin.android.ext.koin.androidLogger
+import org.koin.core.context.startKoin
 
 class SimpleNotesApplication : Application() {
-    
+
     companion object {
         private const val TAG = "SimpleNotesApp"
     }
-    
+
     lateinit var networkMonitor: NetworkMonitor  // Public access für SettingsActivity
-    
+
     /**
      * 🌍 v1.7.1: Apply app locale to Application Context
-     * 
+     *
      * This ensures ViewModels and other components using Application Context
      * get the correct locale-specific strings.
      */
@@ -26,71 +30,77 @@ class SimpleNotesApplication : Application() {
         // This is handled by AppCompatDelegate which reads from system storage
         super.attachBaseContext(base)
     }
-    
+
     override fun onCreate() {
         super.onCreate()
-        
+
+        startKoin {
+            androidLogger() // Log Koin events
+            androidContext(this@SimpleNotesApplication) // Provide context to modules
+            modules(appModule)
+        }
+
         val prefs = getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
-        
+
         // 🔧 Hotfix v1.6.2: Migrate offline mode setting BEFORE any ViewModel initialization
         // This prevents the offline mode bug where users updating from v1.5.0 incorrectly
         // appear as offline even though they have a configured server
         migrateOfflineModeSetting(prefs)
-        
+
         // File-Logging ZUERST aktivieren (damit alle Logs geschrieben werden!)
         if (prefs.getBoolean("file_logging_enabled", false)) {
             Logger.enableFileLogging(this)
             Logger.d(TAG, "📝 File logging enabled at Application startup")
         }
-        
+
         Logger.d(TAG, "🚀 Application onCreate()")
-        
+
         // Initialize notification channel
         NotificationHelper.createNotificationChannel(this)
         Logger.d(TAG, "✅ Notification channel created")
-        
+
         // Initialize NetworkMonitor (WorkManager-based)
         // VORTEIL: WorkManager läuft auch ohne aktive App!
         networkMonitor = NetworkMonitor(applicationContext)
-        
+
         // Start WorkManager periodic sync
         // Dies läuft im Hintergrund auch wenn App geschlossen ist
         networkMonitor.startMonitoring()
-        
+
         Logger.d(TAG, "✅ WorkManager-based auto-sync initialized")
     }
-    
+
     override fun onTerminate() {
         super.onTerminate()
-        
+
         Logger.d(TAG, "🛑 Application onTerminate()")
-        
+
         // WorkManager läuft weiter auch nach onTerminate!
         // Nur bei deaktiviertem Auto-Sync stoppen wir es
     }
-    
+
     /**
      * 🔧 Hotfix v1.6.2: Migrate offline mode setting for updates from v1.5.0
-     * 
-     * Problem: KEY_OFFLINE_MODE didn't exist in v1.5.0, but MainViewModel 
-     * and NoteEditorViewModel use `true` as default, causing existing users 
+     *
+     * Problem: KEY_OFFLINE_MODE didn't exist in v1.5.0, but MainViewModel
+     * and NoteEditorViewModel use `true` as default, causing existing users
      * with configured servers to appear in offline mode after update.
-     * 
+     *
      * Fix: Set the key BEFORE any ViewModel is initialized based on whether
      * a server was already configured.
      */
     private fun migrateOfflineModeSetting(prefs: android.content.SharedPreferences) {
         if (!prefs.contains(Constants.KEY_OFFLINE_MODE)) {
             val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
-            val hasServerConfig = !serverUrl.isNullOrEmpty() && 
-                                  serverUrl != "http://" && 
+            val hasServerConfig = !serverUrl.isNullOrEmpty() &&
+                                  serverUrl != "http://" &&
                                   serverUrl != "https://"
-            
+
             // If server was configured → offlineMode = false (continue syncing)
             // If no server → offlineMode = true (new users / offline users)
             val offlineModeValue = !hasServerConfig
             prefs.edit().putBoolean(Constants.KEY_OFFLINE_MODE, offlineModeValue).apply()
-            
+
             Logger.i(TAG, "🔄 Migrated offline_mode_enabled: hasServer=$hasServerConfig → offlineMode=$offlineModeValue")
         }
     }

android/app/src/main/java/dev/dettmer/simplenotes/backup/BackupManager.kt

@@ -11,21 +11,24 @@ import dev.dettmer.simplenotes.storage.NotesStorage
 import dev.dettmer.simplenotes.utils.Logger
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
+import org.koin.core.component.KoinComponent
+import org.koin.java.KoinJavaComponent.inject
 import java.io.File
 import java.text.SimpleDateFormat
 import java.util.*
+import kotlin.getValue
 
 /**
  * BackupManager: Lokale Backup & Restore Funktionalität
- * 
+ *
  * Features:
  * - Backup aller Notizen in JSON-Datei
  * - Restore mit 3 Modi (Merge, Replace, Overwrite Duplicates)
  * - Auto-Backup vor Restore (Sicherheitsnetz)
  * - Backup-Validierung
  */
-class BackupManager(private val context: Context) {
-    
+class BackupManager(private val context: Context): KoinComponent {
+
     companion object {
         private const val TAG = "BackupManager"
         private const val BACKUP_VERSION = 1
@@ -33,14 +36,14 @@ class BackupManager(private val context: Context) {
         private const val AUTO_BACKUP_RETENTION_DAYS = 7
         private const val MAGIC_BYTES_LENGTH = 4  // v1.7.0: For encryption check
     }
-    
-    private val storage = NotesStorage(context)
+
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
     private val gson: Gson = GsonBuilder().setPrettyPrinting().create()
     private val encryptionManager = EncryptionManager()  // 🔐 v1.7.0
-    
+
     /**
      * Erstellt Backup aller Notizen
-     * 
+     *
      * @param uri Output-URI (via Storage Access Framework)
      * @param password Optional password for encryption (null = unencrypted)
      * @return BackupResult mit Erfolg/Fehler Info
@@ -49,10 +52,10 @@ class BackupManager(private val context: Context) {
         return@withContext try {
             val encryptedSuffix = if (password != null) " (encrypted)" else ""
             Logger.d(TAG, "📦 Creating backup$encryptedSuffix to: $uri")
-            
+
             val allNotes = storage.loadAllNotes()
             Logger.d(TAG, "   Found ${allNotes.size} notes to backup")
-            
+
             val backupData = BackupData(
                 backupVersion = BACKUP_VERSION,
                 createdAt = System.currentTimeMillis(),
@@ -60,27 +63,27 @@ class BackupManager(private val context: Context) {
                 appVersion = BuildConfig.VERSION_NAME,
                 notes = allNotes
             )
-            
+
             val jsonString = gson.toJson(backupData)
-            
+
             // 🔐 v1.7.0: Encrypt if password is provided
             val dataToWrite = if (password != null) {
                 encryptionManager.encrypt(jsonString.toByteArray(), password)
             } else {
                 jsonString.toByteArray()
             }
-            
+
             context.contentResolver.openOutputStream(uri)?.use { outputStream ->
                 outputStream.write(dataToWrite)
                 Logger.d(TAG, "✅ Backup created successfully$encryptedSuffix")
             }
-            
+
             BackupResult(
                 success = true,
                 notesCount = allNotes.size,
                 message = "Backup erstellt: ${allNotes.size} Notizen$encryptedSuffix"
             )
-            
+
         } catch (e: Exception) {
             Logger.e(TAG, "Failed to create backup", e)
             BackupResult(
@@ -89,11 +92,11 @@ class BackupManager(private val context: Context) {
             )
         }
     }
-    
+
     /**
      * Erstellt automatisches Backup (vor Restore)
      * Gespeichert in app-internem Storage
-     * 
+     *
      * @return Uri des Auto-Backups oder null bei Fehler
      */
     suspend fun createAutoBackup(): Uri? = withContext(Dispatchers.IO) {
@@ -101,14 +104,14 @@ class BackupManager(private val context: Context) {
             val autoBackupDir = File(context.filesDir, AUTO_BACKUP_DIR).apply {
                 if (!exists()) mkdirs()
             }
-            
+
             val timestamp = SimpleDateFormat("yyyy-MM-dd_HHmmss", Locale.US)
                 .format(Date())
             val filename = "auto_backup_before_restore_$timestamp.json"
             val file = File(autoBackupDir, filename)
-            
+
             Logger.d(TAG, "📦 Creating auto-backup: ${file.absolutePath}")
-            
+
             val allNotes = storage.loadAllNotes()
             val backupData = BackupData(
                 backupVersion = BACKUP_VERSION,
@@ -117,24 +120,24 @@ class BackupManager(private val context: Context) {
                 appVersion = BuildConfig.VERSION_NAME,
                 notes = allNotes
             )
-            
+
             file.writeText(gson.toJson(backupData))
-            
+
             // Cleanup alte Auto-Backups
             cleanupOldAutoBackups(autoBackupDir)
-            
+
             Logger.d(TAG, "✅ Auto-backup created: ${file.absolutePath}")
             Uri.fromFile(file)
-            
+
         } catch (e: Exception) {
             Logger.e(TAG, "Failed to create auto-backup", e)
             null
         }
     }
-    
+
     /**
      * Stellt Notizen aus Backup wieder her
-     * 
+     *
      * @param uri Backup-Datei URI
      * @param mode Wiederherstellungs-Modus (Merge/Replace/Overwrite)
      * @param password Optional password if backup is encrypted
@@ -143,7 +146,7 @@ class BackupManager(private val context: Context) {
     suspend fun restoreBackup(uri: Uri, mode: RestoreMode, password: String? = null): RestoreResult = withContext(Dispatchers.IO) {
         return@withContext try {
             Logger.d(TAG, "📥 Restoring backup from: $uri (mode: $mode)")
-            
+
             // 1. Backup-Datei lesen
             val fileData = context.contentResolver.openInputStream(uri)?.use { inputStream ->
                 inputStream.readBytes()
@@ -151,7 +154,7 @@ class BackupManager(private val context: Context) {
                 success = false,
                 error = "Datei konnte nicht gelesen werden"
             )
-            
+
             // 🔐 v1.7.0: Check if encrypted and decrypt if needed
             val jsonString = try {
                 if (encryptionManager.isEncrypted(fileData)) {
@@ -172,7 +175,7 @@ class BackupManager(private val context: Context) {
                     error = "Entschlüsselung fehlgeschlagen: ${e.message}"
                 )
             }
-            
+
             // 2. Backup validieren & parsen
             val validationResult = validateBackup(jsonString)
             if (!validationResult.isValid) {
@@ -181,26 +184,26 @@ class BackupManager(private val context: Context) {
                     error = validationResult.errorMessage ?: context.getString(R.string.error_invalid_backup_file)
                 )
             }
-            
+
             val backupData = gson.fromJson(jsonString, BackupData::class.java)
             Logger.d(TAG, "   Backup valid: ${backupData.notesCount} notes, version ${backupData.backupVersion}")
-            
+
             // 3. Auto-Backup erstellen (Sicherheitsnetz)
             val autoBackupUri = createAutoBackup()
             if (autoBackupUri == null) {
                 Logger.w(TAG, "⚠️ Auto-backup failed, but continuing with restore")
             }
-            
+
             // 4. Restore durchführen (je nach Modus)
             val result = when (mode) {
                 RestoreMode.MERGE -> restoreMerge(backupData.notes)
                 RestoreMode.REPLACE -> restoreReplace(backupData.notes)
                 RestoreMode.OVERWRITE_DUPLICATES -> restoreOverwriteDuplicates(backupData.notes)
             }
-            
+
             Logger.d(TAG, "✅ Restore completed: ${result.importedNotes} imported, ${result.skippedNotes} skipped")
             result
-            
+
         } catch (e: Exception) {
             Logger.e(TAG, "Failed to restore backup", e)
             RestoreResult(
@@ -209,7 +212,7 @@ class BackupManager(private val context: Context) {
             )
         }
     }
-    
+
     /**
      * 🔐 v1.7.0: Check if backup file is encrypted
      */
@@ -225,14 +228,14 @@ class BackupManager(private val context: Context) {
             false
         }
     }
-    
+
     /**
      * Validiert Backup-Datei
      */
     private fun validateBackup(jsonString: String): ValidationResult {
         return try {
             val backupData = gson.fromJson(jsonString, BackupData::class.java)
-            
+
             // Version kompatibel?
             if (backupData.backupVersion > BACKUP_VERSION) {
                 return ValidationResult(
@@ -240,7 +243,7 @@ class BackupManager(private val context: Context) {
                     errorMessage = context.getString(R.string.error_backup_version_unsupported, backupData.backupVersion, BACKUP_VERSION)
                 )
             }
-            
+
             // Notizen-Array vorhanden?
             if (backupData.notes.isEmpty()) {
                 return ValidationResult(
@@ -248,21 +251,21 @@ class BackupManager(private val context: Context) {
                     errorMessage = context.getString(R.string.error_backup_empty)
                 )
             }
-            
+
             // Alle Notizen haben ID, title, content?
             val invalidNotes = backupData.notes.filter { note ->
                 note.id.isBlank() || note.title.isBlank()
             }
-            
+
             if (invalidNotes.isNotEmpty()) {
                 return ValidationResult(
                     isValid = false,
                     errorMessage = context.getString(R.string.error_backup_invalid_notes, invalidNotes.size)
                 )
             }
-            
+
             ValidationResult(isValid = true)
-            
+
         } catch (e: Exception) {
             ValidationResult(
                 isValid = false,
@@ -270,22 +273,22 @@ class BackupManager(private val context: Context) {
             )
         }
     }
-    
+
     /**
      * Restore-Modus: MERGE
      * Fügt neue Notizen hinzu, behält bestehende
      */
-    private fun restoreMerge(backupNotes: List<Note>): RestoreResult {
+    private suspend fun restoreMerge(backupNotes: List<Note>): RestoreResult {
         val existingNotes = storage.loadAllNotes()
         val existingIds = existingNotes.map { it.id }.toSet()
-        
+
         val newNotes = backupNotes.filter { it.id !in existingIds }
         val skippedNotes = backupNotes.size - newNotes.size
-        
+
         newNotes.forEach { note ->
             storage.saveNote(note)
         }
-        
+
         return RestoreResult(
             success = true,
             importedNotes = newNotes.size,
@@ -293,20 +296,20 @@ class BackupManager(private val context: Context) {
             message = context.getString(R.string.restore_merge_result, newNotes.size, skippedNotes)
         )
     }
-    
+
     /**
      * Restore-Modus: REPLACE
      * Löscht alle bestehenden Notizen, importiert Backup
      */
-    private fun restoreReplace(backupNotes: List<Note>): RestoreResult {
+    private suspend fun restoreReplace(backupNotes: List<Note>): RestoreResult {
         // Alle bestehenden Notizen löschen
         storage.deleteAllNotes()
-        
+
         // Backup-Notizen importieren
         backupNotes.forEach { note ->
             storage.saveNote(note)
         }
-        
+
         return RestoreResult(
             success = true,
             importedNotes = backupNotes.size,
@@ -319,18 +322,18 @@ class BackupManager(private val context: Context) {
      * Restore-Modus: OVERWRITE_DUPLICATES
      * Backup überschreibt bei ID-Konflikten
      */
-    private fun restoreOverwriteDuplicates(backupNotes: List<Note>): RestoreResult {
+    private suspend fun restoreOverwriteDuplicates(backupNotes: List<Note>): RestoreResult {
         val existingNotes = storage.loadAllNotes()
         val existingIds = existingNotes.map { it.id }.toSet()
-        
+
         val newNotes = backupNotes.filter { it.id !in existingIds }
         val overwrittenNotes = backupNotes.filter { it.id in existingIds }
-        
+
         // Alle Backup-Notizen speichern (überschreibt automatisch)
         backupNotes.forEach { note ->
             storage.saveNote(note)
         }
-        
+
         return RestoreResult(
             success = true,
             importedNotes = newNotes.size,
@@ -339,7 +342,7 @@ class BackupManager(private val context: Context) {
             message = context.getString(R.string.restore_overwrite_result, newNotes.size, overwrittenNotes.size)
         )
     }
-    
+
     /**
      * Löscht Auto-Backups älter als RETENTION_DAYS
      */
@@ -347,7 +350,7 @@ class BackupManager(private val context: Context) {
         try {
             val retentionTimeMs = AUTO_BACKUP_RETENTION_DAYS * 24 * 60 * 60 * 1000L
             val cutoffTime = System.currentTimeMillis() - retentionTimeMs
-            
+
             autoBackupDir.listFiles()?.forEach { file ->
                 if (file.lastModified() < cutoffTime) {
                     Logger.d(TAG, "🗑️ Deleting old auto-backup: ${file.name}")

android/app/src/main/java/dev/dettmer/simplenotes/di/AppModule.kt

@@ -0,0 +1,36 @@
+package dev.dettmer.simplenotes.di
+
+import android.content.Context
+import androidx.room.Room
+import dev.dettmer.simplenotes.storage.AppDatabase
+import dev.dettmer.simplenotes.storage.NotesStorage
+import dev.dettmer.simplenotes.ui.main.MainViewModel
+import dev.dettmer.simplenotes.utils.Constants
+import org.koin.android.ext.koin.androidApplication
+import org.koin.android.ext.koin.androidContext
+import org.koin.androidx.viewmodel.dsl.viewModel
+import org.koin.dsl.module
+
+val appModule = module {
+    single {
+        Room.databaseBuilder(
+            androidContext(),
+            AppDatabase::class.java,
+            "notes_database"
+        ).build()
+    }
+
+    single { get<AppDatabase>().noteDao() }
+    single { get<AppDatabase>().deletedNoteDao() }
+
+    single { NotesStorage(androidContext(), get(), get()) }
+
+    // Provide SharedPreferences
+    single {
+        androidContext().getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
+    }
+
+
+
+    viewModel { MainViewModel(androidApplication()) }
+}

android/app/src/main/java/dev/dettmer/simplenotes/storage/AppDatabase.kt

@@ -0,0 +1,19 @@
+package dev.dettmer.simplenotes.storage
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
+import dev.dettmer.simplenotes.storage.converter.NoteConverters
+import dev.dettmer.simplenotes.storage.dao.DeletedNoteDao
+import dev.dettmer.simplenotes.storage.dao.NoteDao
+import dev.dettmer.simplenotes.storage.entity.DeletedNoteEntity
+import dev.dettmer.simplenotes.storage.entity.NoteEntity
+
+@Database(entities = [NoteEntity::class, DeletedNoteEntity::class], version = 1)
+@TypeConverters(NoteConverters::class)
+abstract class AppDatabase : RoomDatabase() {
+    abstract fun noteDao(): NoteDao
+    abstract fun deletedNoteDao(): DeletedNoteDao
+}

android/app/src/main/java/dev/dettmer/simplenotes/storage/NotesStorage.kt

@@ -3,75 +3,99 @@ package dev.dettmer.simplenotes.storage
 import android.content.Context
 import dev.dettmer.simplenotes.models.DeletionTracker
 import dev.dettmer.simplenotes.models.Note
+import dev.dettmer.simplenotes.models.SyncStatus
+import dev.dettmer.simplenotes.storage.dao.DeletedNoteDao
+import dev.dettmer.simplenotes.storage.dao.NoteDao
+import dev.dettmer.simplenotes.storage.entity.DeletedNoteEntity
+import dev.dettmer.simplenotes.storage.entity.NoteEntity
 import dev.dettmer.simplenotes.utils.DeviceIdGenerator
 import dev.dettmer.simplenotes.utils.Logger
-import kotlinx.coroutines.sync.Mutex
-import kotlinx.coroutines.sync.withLock
 import java.io.File
 
-class NotesStorage(private val context: Context) {
-    
+class NotesStorage(
+    private val context: Context,
+    private val noteDao: NoteDao,
+    private val deletedNoteDao: DeletedNoteDao,
+) {
+
     companion object {
         private const val TAG = "NotesStorage"
-        // 🔒 v1.7.2 (IMPL_001): Mutex für thread-sichere Deletion Tracker Operationen
-        private val deletionTrackerMutex = Mutex()
     }
-    
-    private val notesDir: File = File(context.filesDir, "notes").apply {
-        if (!exists()) mkdirs()
+
+
+    suspend fun saveNote(note: Note) {
+        noteDao.saveNote(
+            NoteEntity(
+                id = note.id,
+                title = note.title,
+                content = note.content,
+                createdAt = note.createdAt,
+                updatedAt = note.updatedAt,
+                deviceId = note.deviceId,
+                syncStatus = note.syncStatus,
+                noteType = note.noteType,
+                checklistItems = note.checklistItems,
+                checklistSortOption = note.checklistSortOption
+            )
+        )
     }
-    
-    fun saveNote(note: Note) {
-        val file = File(notesDir, "${note.id}.json")
-        file.writeText(note.toJson())
-    }
-    
-    fun loadNote(id: String): Note? {
-        val file = File(notesDir, "$id.json")
-        return if (file.exists()) {
-            Note.fromJson(file.readText())
-        } else {
-            null
+
+    suspend fun loadNote(id: String): Note? {
+        return noteDao.getNote(id)?.let { note ->
+            Note(
+                id = note.id,
+                title = note.title,
+                content = note.content,
+                createdAt = note.createdAt,
+                updatedAt = note.updatedAt,
+                deviceId = note.deviceId,
+                syncStatus = note.syncStatus,
+                noteType = note.noteType,
+                checklistItems = note.checklistItems,
+                checklistSortOption = note.checklistSortOption
+            )
         }
     }
-    
-    /**
-     * Lädt alle Notizen aus dem lokalen Speicher.
-     * 
-     * 🔀 v1.8.0: Sortierung entfernt — wird jetzt im ViewModel durchgeführt,
-     * damit der User die Sortierung konfigurieren kann.
-     */
-    fun loadAllNotes(): List<Note> {
-        return notesDir.listFiles()
-            ?.filter { it.extension == "json" }
-            ?.mapNotNull { Note.fromJson(it.readText()) }
-            ?: emptyList()
+
+    suspend fun loadAllNotes(): List<Note> {
+        return noteDao.getAllNotes().map { note ->
+            Note(
+                id = note.id,
+                title = note.title,
+                content = note.content,
+                createdAt = note.createdAt,
+                updatedAt = note.updatedAt,
+                deviceId = note.deviceId,
+                syncStatus = note.syncStatus,
+                noteType = note.noteType,
+                checklistItems = note.checklistItems,
+                checklistSortOption = note.checklistSortOption
+            )
+        }
     }
-    
-    fun deleteNote(id: String): Boolean {
-        val file = File(notesDir, "$id.json")
-        val deleted = file.delete()
-        
+
+    suspend fun deleteNote(id: String): Boolean {
+        val deleted = noteDao.deleteNoteById(id) > 0
+
         if (deleted) {
-            Logger.d(TAG, "🗑️ Deleted note: $id")
-            
-            // Track deletion to prevent zombie notes
             val deviceId = DeviceIdGenerator.getDeviceId(context)
-            trackDeletion(id, deviceId)
+            deletedNoteDao.trackDeletion(DeletedNoteEntity(id, deviceId))
         }
-        
+
         return deleted
     }
-    
-    fun deleteAllNotes(): Boolean {
+
+    suspend fun deleteAllNotes(): Boolean {
         return try {
-            val notes = loadAllNotes()
-            val deviceId = DeviceIdGenerator.getDeviceId(context)
-            
+            val notes = noteDao.getAllNotes()
+
+            noteDao.deleteAllNotes()
+
             for (note in notes) {
-                deleteNote(note.id)  // Uses trackDeletion() automatically
+                val deviceId = DeviceIdGenerator.getDeviceId(context)
+                deletedNoteDao.trackDeletion(DeletedNoteEntity(note.id, deviceId))
             }
-            
+
             Logger.d(TAG, "🗑️ Deleted all notes (${notes.size} notes)")
             true
         } catch (e: Exception) {
@@ -79,19 +103,19 @@ class NotesStorage(private val context: Context) {
             false
         }
     }
-    
+
     // === Deletion Tracking ===
-    
+
     private fun getDeletionTrackerFile(): File {
         return File(context.filesDir, "deleted_notes.json")
     }
-    
+
     fun loadDeletionTracker(): DeletionTracker {
         val file = getDeletionTrackerFile()
         if (!file.exists()) {
             return DeletionTracker()
         }
-        
+
         return try {
             val json = file.readText()
             DeletionTracker.fromJson(json) ?: DeletionTracker()
@@ -100,83 +124,64 @@ class NotesStorage(private val context: Context) {
             DeletionTracker()
         }
     }
-    
+
     fun saveDeletionTracker(tracker: DeletionTracker) {
         try {
             val file = getDeletionTrackerFile()
             file.writeText(tracker.toJson())
-            
+
             if (tracker.deletedNotes.size > 1000) {
                 Logger.w(TAG, "⚠️ Deletion tracker large: ${tracker.deletedNotes.size} entries")
             }
-            
+
             Logger.d(TAG, "✅ Deletion tracker saved (${tracker.deletedNotes.size} entries)")
         } catch (e: Exception) {
             Logger.e(TAG, "Failed to save deletion tracker", e)
         }
     }
-    
+
     /**
      * 🔒 v1.7.2 (IMPL_001): Thread-sichere Deletion-Tracking mit Mutex
-     * 
+     *
      * Verhindert Race Conditions bei Batch-Deletes durch exklusiven Zugriff
      * auf den Deletion Tracker.
-     * 
+     *
      * @param noteId ID der gelöschten Notiz
      * @param deviceId Geräte-ID für Konflikt-Erkennung
      */
     suspend fun trackDeletionSafe(noteId: String, deviceId: String) {
-        deletionTrackerMutex.withLock {
-            val tracker = loadDeletionTracker()
-            tracker.addDeletion(noteId, deviceId)
-            saveDeletionTracker(tracker)
-            Logger.d(TAG, "📝 Tracked deletion (mutex-protected): $noteId")
-        }
+        deletedNoteDao.trackDeletion(DeletedNoteEntity(noteId, deviceId))
     }
-    
+
     /**
      * Legacy-Methode ohne Mutex-Schutz.
      * Verwendet für synchrone Aufrufe wo Coroutines nicht verfügbar sind.
-     * 
+     *
      * @deprecated Verwende trackDeletionSafe() für Thread-Safety wo möglich
      */
-    fun trackDeletion(noteId: String, deviceId: String) {
-        val tracker = loadDeletionTracker()
-        tracker.addDeletion(noteId, deviceId)
-        saveDeletionTracker(tracker)
+    suspend fun trackDeletion(noteId: String, deviceId: String) {
+        deletedNoteDao.trackDeletion(DeletedNoteEntity(noteId, deviceId))
         Logger.d(TAG, "📝 Tracked deletion: $noteId")
     }
-    
-    fun isNoteDeleted(noteId: String): Boolean {
-        val tracker = loadDeletionTracker()
-        return tracker.isDeleted(noteId)
+
+    suspend fun isNoteDeleted(noteId: String): Boolean {
+        return deletedNoteDao.isNoteDeleted(noteId)
     }
-    
-    fun clearDeletionTracker() {
-        saveDeletionTracker(DeletionTracker())
+
+    suspend fun clearDeletionTracker() {
+        deletedNoteDao.clearTracker()
+
         Logger.d(TAG, "🗑️ Deletion tracker cleared")
     }
-    
+
     /**
      * 🔄 v1.7.0: Reset all sync statuses to PENDING when server changes
      * This ensures notes are uploaded to the new server on next sync
      */
-    fun resetAllSyncStatusToPending(): Int {
-        val notes = loadAllNotes()
-        var updatedCount = 0
-        
-        notes.forEach { note ->
-            if (note.syncStatus == dev.dettmer.simplenotes.models.SyncStatus.SYNCED) {
-                val updatedNote = note.copy(syncStatus = dev.dettmer.simplenotes.models.SyncStatus.PENDING)
-                saveNote(updatedNote)
-                updatedCount++
-            }
-        }
-        
+    suspend fun resetAllSyncStatusToPending(): Int {
+        var updatedCount = noteDao.updateSyncStatus(SyncStatus.SYNCED, SyncStatus.PENDING)
+
         Logger.d(TAG, "🔄 Reset sync status for $updatedCount notes to PENDING")
         return updatedCount
     }
-
-    
-    fun getNotesDir(): File = notesDir
 }

android/app/src/main/java/dev/dettmer/simplenotes/storage/converter/NoteConverters.kt

@@ -0,0 +1,39 @@
+package dev.dettmer.simplenotes.storage.converter
+
+import androidx.room.TypeConverter
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import dev.dettmer.simplenotes.models.ChecklistItem
+import dev.dettmer.simplenotes.models.NoteType
+import dev.dettmer.simplenotes.models.SyncStatus
+
+class NoteConverters {
+    private val gson = Gson()
+
+    // --- NoteType Enum ---
+    @TypeConverter
+    fun fromNoteType(value: NoteType): String = value.name
+
+    @TypeConverter
+    fun toNoteType(value: String): NoteType = NoteType.valueOf(value)
+
+    // --- SyncStatus Enum ---
+    @TypeConverter
+    fun fromSyncStatus(value: SyncStatus): String = value.name
+
+    @TypeConverter
+    fun toSyncStatus(value: String): SyncStatus = SyncStatus.valueOf(value)
+
+    // --- ChecklistItem List ---
+    @TypeConverter
+    fun fromChecklistItems(items: List<ChecklistItem>?): String? {
+        return items?.let { gson.toJson(it) }
+    }
+
+    @TypeConverter
+    fun toChecklistItems(json: String?): List<ChecklistItem>? {
+        if (json == null) return null
+        val type = object : TypeToken<List<ChecklistItem>>() {}.type
+        return gson.fromJson(json, type)
+    }
+}

android/app/src/main/java/dev/dettmer/simplenotes/storage/dao/DeletedNoteDao.kt

@@ -0,0 +1,19 @@
+package dev.dettmer.simplenotes.storage.dao
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import dev.dettmer.simplenotes.storage.entity.DeletedNoteEntity
+
+@Dao
+interface DeletedNoteDao {
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun trackDeletion(deletedNote: DeletedNoteEntity)
+
+    @Query("SELECT EXISTS(SELECT 1 FROM deleted_notes WHERE noteId = :noteId)")
+    suspend fun isNoteDeleted(noteId: String): Boolean
+
+    @Query("DELETE FROM deleted_notes")
+    suspend fun clearTracker()
+}

android/app/src/main/java/dev/dettmer/simplenotes/storage/dao/NoteDao.kt

@@ -0,0 +1,29 @@
+package dev.dettmer.simplenotes.storage.dao
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import dev.dettmer.simplenotes.models.SyncStatus
+import dev.dettmer.simplenotes.storage.entity.NoteEntity
+
+@Dao
+interface NoteDao {
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun saveNote(note: NoteEntity)
+
+    @Query("SELECT * FROM notes WHERE id = :id")
+    suspend fun getNote(id: String): NoteEntity?
+
+    @Query("SELECT * FROM notes")
+    suspend fun getAllNotes(): List<NoteEntity>
+
+    @Query("DELETE FROM notes WHERE id = :id")
+    suspend fun deleteNoteById(id: String): Int
+
+    @Query("DELETE FROM notes")
+    suspend fun deleteAllNotes(): Int
+
+    @Query("UPDATE notes SET syncStatus = :newStatus WHERE syncStatus = :oldStatus")
+    suspend fun updateSyncStatus(oldStatus: SyncStatus, newStatus: SyncStatus): Int
+}

android/app/src/main/java/dev/dettmer/simplenotes/storage/entity/DeletedNoteEntity.kt

@@ -0,0 +1,11 @@
+package dev.dettmer.simplenotes.storage.entity
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "deleted_notes")
+data class DeletedNoteEntity(
+    @PrimaryKey val noteId: String,
+    val deviceId: String,
+    val deletedAt: Long = System.currentTimeMillis()
+)

android/app/src/main/java/dev/dettmer/simplenotes/storage/entity/NoteEntity.kt

@@ -0,0 +1,22 @@
+package dev.dettmer.simplenotes.storage.entity
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import dev.dettmer.simplenotes.models.ChecklistItem
+import dev.dettmer.simplenotes.models.NoteType
+import dev.dettmer.simplenotes.models.SyncStatus
+
+@Entity(tableName = "notes")
+data class NoteEntity(
+    @PrimaryKey
+    val id: String,
+    val title: String,
+    val content: String,
+    val createdAt: Long,
+    val updatedAt: Long,
+    val deviceId: String,
+    val syncStatus: SyncStatus,
+    val noteType: NoteType,
+    val checklistItems: List<ChecklistItem>?, // Handled by TypeConverter
+    val checklistSortOption: String?
+)

android/app/src/main/java/dev/dettmer/simplenotes/ui/editor/NoteEditorViewModel.kt

@@ -2,6 +2,7 @@ package dev.dettmer.simplenotes.ui.editor
 
 import android.app.Application
 import android.content.Context
+import android.content.SharedPreferences
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.SavedStateHandle
 import androidx.lifecycle.viewModelScope
@@ -29,67 +30,69 @@ import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import org.koin.java.KoinJavaComponent.inject
 import java.util.UUID
+import kotlin.getValue
 
 /**
  * ViewModel for NoteEditor Compose Screen
  * v1.5.0: Jetpack Compose NoteEditor Redesign
- * 
+ *
  * Manages note editing state including title, content, and checklist items.
  */
 class NoteEditorViewModel(
     application: Application,
     private val savedStateHandle: SavedStateHandle
 ) : AndroidViewModel(application) {
-    
+
     companion object {
         private const val TAG = "NoteEditorViewModel"
         const val ARG_NOTE_ID = "noteId"
         const val ARG_NOTE_TYPE = "noteType"
     }
-    
-    private val storage = NotesStorage(application)
-    private val prefs = application.getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
-    
+
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+    private val prefs: SharedPreferences by inject(SharedPreferences::class.java)
+
     // ═══════════════════════════════════════════════════════════════════════
     // State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _uiState = MutableStateFlow(NoteEditorUiState())
     val uiState: StateFlow<NoteEditorUiState> = _uiState.asStateFlow()
-    
+
     private val _checklistItems = MutableStateFlow<List<ChecklistItemState>>(emptyList())
     val checklistItems: StateFlow<List<ChecklistItemState>> = _checklistItems.asStateFlow()
-    
+
     // 🌟 v1.6.0: Offline Mode State
     private val _isOfflineMode = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_OFFLINE_MODE, true)
     )
     val isOfflineMode: StateFlow<Boolean> = _isOfflineMode.asStateFlow()
-    
+
     // 🔀 v1.8.0 (IMPL_020): Letzte Checklist-Sortierung (Session-Scope)
     private val _lastChecklistSortOption = MutableStateFlow(ChecklistSortOption.MANUAL)
     val lastChecklistSortOption: StateFlow<ChecklistSortOption> = _lastChecklistSortOption.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Events
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _events = MutableSharedFlow<NoteEditorEvent>()
     val events: SharedFlow<NoteEditorEvent> = _events.asSharedFlow()
-    
+
     // Internal state
     private var existingNote: Note? = null
     private var currentNoteType: NoteType = NoteType.TEXT
-    
+
     init {
         loadNote()
     }
-    
+
     private fun loadNote() {
         val noteId = savedStateHandle.get<String>(ARG_NOTE_ID)
         val noteTypeString = savedStateHandle.get<String>(ARG_NOTE_TYPE) ?: NoteType.TEXT.name
-        
+
         if (noteId != null) {
             loadExistingNote(noteId)
         } else {
@@ -97,7 +100,7 @@ class NoteEditorViewModel(
         }
     }
 
-    private fun loadExistingNote(noteId: String) {
+    private fun loadExistingNote(noteId: String) = viewModelScope.launch{
         existingNote = storage.loadNote(noteId)
         existingNote?.let { note ->
             currentNoteType = note.noteType
@@ -114,7 +117,7 @@ class NoteEditorViewModel(
                     }
                 )
             }
-            
+
             if (note.noteType == NoteType.CHECKLIST) {
                 loadChecklistData(note)
             }
@@ -126,7 +129,7 @@ class NoteEditorViewModel(
         note.checklistSortOption?.let { sortName ->
             _lastChecklistSortOption.value = parseSortOption(sortName)
         }
-        
+
         val items = note.checklistItems?.sortedBy { it.order }?.map {
             ChecklistItemState(
                 id = it.id,
@@ -146,7 +149,7 @@ class NoteEditorViewModel(
             Logger.w(TAG, "Invalid note type '$noteTypeString', defaulting to TEXT")
             NoteType.TEXT
         }
-        
+
         _uiState.update { state ->
             state.copy(
                 noteType = currentNoteType,
@@ -158,7 +161,7 @@ class NoteEditorViewModel(
                 }
             )
         }
-        
+
         // Add first empty item for new checklists
         if (currentNoteType == NoteType.CHECKLIST) {
             _checklistItems.value = listOf(ChecklistItemState.createEmpty(0))
@@ -177,19 +180,19 @@ class NoteEditorViewModel(
             ChecklistSortOption.MANUAL
         }
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     fun updateTitle(title: String) {
         _uiState.update { it.copy(title = title) }
     }
-    
+
     fun updateContent(content: String) {
         _uiState.update { it.copy(content = content) }
     }
-    
+
     fun updateChecklistItemText(itemId: String, newText: String) {
         _checklistItems.update { items ->
             items.map { item ->
@@ -197,7 +200,7 @@ class NoteEditorViewModel(
             }
         }
     }
-    
+
     /**
      * 🆕 v1.8.0 (IMPL_017): Sortiert Checklist-Items mit Unchecked oben, Checked unten.
      * Stabile Sortierung: Relative Reihenfolge innerhalb jeder Gruppe bleibt erhalten.
@@ -243,7 +246,7 @@ class NoteEditorViewModel(
             }
         }
     }
-    
+
     /**
      * 🆕 v1.8.1 (IMPL_15): Fügt ein neues Item nach dem angegebenen Item ein.
      *
@@ -320,7 +323,7 @@ class NoteEditorViewModel(
             else -> items.size
         }
     }
-    
+
     fun deleteChecklistItem(itemId: String) {
         _checklistItems.update { items ->
             val filtered = items.filter { it.id != itemId }
@@ -333,7 +336,7 @@ class NoteEditorViewModel(
             }
         }
     }
-    
+
     fun moveChecklistItem(fromIndex: Int, toIndex: Int) {
         _checklistItems.update { items ->
             val fromItem = items.getOrNull(fromIndex) ?: return@update items
@@ -355,7 +358,7 @@ class NoteEditorViewModel(
             mutableList.mapIndexed { index, i -> i.copy(order = index) }
         }
     }
-    
+
     /**
      * 🔀 v1.8.0 (IMPL_020): Sortiert Checklist-Items nach gewählter Option.
      * Einmalige Aktion (nicht persistiert) — User kann danach per Drag & Drop feinjustieren.
@@ -363,44 +366,44 @@ class NoteEditorViewModel(
     fun sortChecklistItems(option: ChecklistSortOption) {
         // Merke die Auswahl für diesen Editor-Session
         _lastChecklistSortOption.value = option
-        
+
         _checklistItems.update { items ->
             val sorted = when (option) {
                 // Bei MANUAL: Sortiere nach checked/unchecked, damit Separator korrekt platziert wird
                 ChecklistSortOption.MANUAL -> items.sortedBy { it.isChecked }
-                
-                ChecklistSortOption.ALPHABETICAL_ASC -> 
+
+                ChecklistSortOption.ALPHABETICAL_ASC ->
                     items.sortedBy { it.text.lowercase() }
-                
-                ChecklistSortOption.ALPHABETICAL_DESC -> 
+
+                ChecklistSortOption.ALPHABETICAL_DESC ->
                     items.sortedByDescending { it.text.lowercase() }
-                
-                ChecklistSortOption.UNCHECKED_FIRST -> 
+
+                ChecklistSortOption.UNCHECKED_FIRST ->
                     items.sortedBy { it.isChecked }
-                
-                ChecklistSortOption.CHECKED_FIRST -> 
+
+                ChecklistSortOption.CHECKED_FIRST ->
                     items.sortedByDescending { it.isChecked }
             }
-            
+
             // Order-Werte neu zuweisen
             sorted.mapIndexed { index, item -> item.copy(order = index) }
         }
     }
-    
+
     fun saveNote() {
         viewModelScope.launch {
             val state = _uiState.value
             val title = state.title.trim()
-            
+
             when (currentNoteType) {
                 NoteType.TEXT -> {
                     val content = state.content.trim()
-                    
+
                     if (title.isEmpty() && content.isEmpty()) {
                         _events.emit(NoteEditorEvent.ShowToast(ToastMessage.NOTE_IS_EMPTY))
                         return@launch
                     }
-                    
+
                     val note = if (existingNote != null) {
                         // 🆕 v1.8.0 (IMPL_022): syncStatus wird immer auf PENDING gesetzt
                         // beim Bearbeiten - gilt für SYNCED, CONFLICT, DELETED_ON_SERVER, etc.
@@ -422,10 +425,10 @@ class NoteEditorViewModel(
                             syncStatus = SyncStatus.LOCAL_ONLY
                         )
                     }
-                    
+
                     storage.saveNote(note)
                 }
-                
+
                 NoteType.CHECKLIST -> {
                     // Filter empty items
                     val validItems = _checklistItems.value
@@ -438,12 +441,12 @@ class NoteEditorViewModel(
                                 order = index
                             )
                         }
-                    
+
                     if (title.isEmpty() && validItems.isEmpty()) {
                         _events.emit(NoteEditorEvent.ShowToast(ToastMessage.NOTE_IS_EMPTY))
                         return@launch
                     }
-                    
+
                     val note = if (existingNote != null) {
                         // 🆕 v1.8.0 (IMPL_022): syncStatus wird immer auf PENDING gesetzt
                         // beim Bearbeiten - gilt für SYNCED, CONFLICT, DELETED_ON_SERVER, etc.
@@ -467,11 +470,11 @@ class NoteEditorViewModel(
                             syncStatus = SyncStatus.LOCAL_ONLY
                         )
                     }
-                    
+
                     storage.saveNote(note)
                 }
             }
-            
+
             // 🆕 v1.8.1 (IMPL_12): NOTE_SAVED Toast entfernt — NavigateBack ist ausreichend
 
             // 🌟 v1.6.0: Trigger onSave Sync
@@ -491,7 +494,7 @@ class NoteEditorViewModel(
             _events.emit(NoteEditorEvent.NavigateBack)
         }
     }
-    
+
     /**
      * Delete the current note
      * @param deleteOnServer if true, also triggers server deletion; if false, only deletes locally
@@ -501,10 +504,10 @@ class NoteEditorViewModel(
         viewModelScope.launch {
             existingNote?.let { note ->
                 val noteId = note.id
-                
+
                 // Delete locally first
                 storage.deleteNote(noteId)
-                
+
                 // Delete from server if requested
                 if (deleteOnServer) {
                     try {
@@ -538,18 +541,18 @@ class NoteEditorViewModel(
                         )
                     }
                 }
-                
+
                 _events.emit(NoteEditorEvent.NavigateBack)
             }
         }
     }
-    
+
     fun showDeleteConfirmation() {
         viewModelScope.launch {
             _events.emit(NoteEditorEvent.ShowDeleteConfirmation)
         }
     }
-    
+
     fun canDelete(): Boolean = existingNote != null
 
     /**
@@ -564,10 +567,10 @@ class NoteEditorViewModel(
      * Nur checklistItems werden aktualisiert — nicht title oder content,
      * damit ungespeicherte Text-Änderungen im Editor nicht verloren gehen.
      */
-    fun reloadFromStorage() {
-        val noteId = savedStateHandle.get<String>(ARG_NOTE_ID) ?: return
+    fun reloadFromStorage() = viewModelScope.launch{
+        val noteId = savedStateHandle.get<String>(ARG_NOTE_ID) ?: return@launch
 
-        val freshNote = storage.loadNote(noteId) ?: return
+        val freshNote = storage.loadNote(noteId) ?: return@launch
 
         // Nur Checklist-Items aktualisieren
         if (freshNote.noteType == NoteType.CHECKLIST) {
@@ -578,7 +581,7 @@ class NoteEditorViewModel(
                     isChecked = it.isChecked,
                     order = it.order
                 )
-            } ?: return
+            } ?: return@launch
 
             _checklistItems.value = sortChecklistItems(freshItems)
             // existingNote aktualisieren damit beim Speichern der richtige
@@ -586,16 +589,16 @@ class NoteEditorViewModel(
             existingNote = freshNote
         }
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════════
     // 🌟 v1.6.0: Sync Trigger - onSave
     // ═══════════════════════════════════════════════════════════════════════════
-    
+
     /**
      * Triggers sync after saving a note (if enabled and server configured)
      * v1.6.0: New configurable sync trigger
      * v1.7.0: Uses central canSync() gate for WiFi-only check
-     * 
+     *
      * Separate throttling (5 seconds) to prevent spam when saving multiple times
      */
     private fun triggerOnSaveSync() {
@@ -604,7 +607,7 @@ class NoteEditorViewModel(
             Logger.d(TAG, "⏭️ onSave sync disabled - skipping")
             return
         }
-        
+
         // 🆕 v1.7.0: Zentrale Sync-Gate Prüfung (inkl. WiFi-Only, Offline Mode, Server Config)
         val syncService = WebDavSyncService(getApplication())
         val gateResult = syncService.canSync()
@@ -616,21 +619,21 @@ class NoteEditorViewModel(
             }
             return
         }
-        
+
         // Check 2: Throttling (5 seconds) to prevent spam
         val lastOnSaveSyncTime = prefs.getLong(Constants.PREF_LAST_ON_SAVE_SYNC_TIME, 0)
         val now = System.currentTimeMillis()
         val timeSinceLastSync = now - lastOnSaveSyncTime
-        
+
         if (timeSinceLastSync < Constants.MIN_ON_SAVE_SYNC_INTERVAL_MS) {
             val remainingSeconds = (Constants.MIN_ON_SAVE_SYNC_INTERVAL_MS - timeSinceLastSync) / 1000
             Logger.d(TAG, "⏳ onSave sync throttled - wait ${remainingSeconds}s")
             return
         }
-        
+
         // Update last sync time
         prefs.edit().putLong(Constants.PREF_LAST_ON_SAVE_SYNC_TIME, now).apply()
-        
+
         // Trigger sync via WorkManager
         Logger.d(TAG, "📤 Triggering onSave sync")
         val syncRequest = OneTimeWorkRequestBuilder<SyncWorker>()

android/app/src/main/java/dev/dettmer/simplenotes/ui/main/ComposeMainActivity.kt

@@ -8,6 +8,7 @@ import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
+import android.content.SharedPreferences
 import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
@@ -44,11 +45,14 @@ import dev.dettmer.simplenotes.utils.Constants
 import dev.dettmer.simplenotes.utils.Logger
 import dev.dettmer.simplenotes.utils.NotificationHelper
 import kotlinx.coroutines.launch
+import org.koin.androidx.viewmodel.ext.android.viewModel
+import org.koin.java.KoinJavaComponent.inject
+import kotlin.getValue
 
 /**
  * Main Activity with Jetpack Compose UI
  * v1.5.0: Complete MainActivity Redesign with Compose
- * 
+ *
  * Replaces the old 805-line MainActivity.kt with a modern
  * Compose-based implementation featuring:
  * - Notes list with swipe-to-delete
@@ -58,22 +62,21 @@ import kotlinx.coroutines.launch
  * - Design consistent with ComposeSettingsActivity
  */
 class ComposeMainActivity : ComponentActivity() {
-    
+
     companion object {
         private const val TAG = "ComposeMainActivity"
         private const val REQUEST_NOTIFICATION_PERMISSION = 1001
         private const val REQUEST_SETTINGS = 1002
     }
-    
-    private val viewModel: MainViewModel by viewModels()
-    
-    private val prefs by lazy {
-        getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
-    }
-    
+
+    private val viewModel: MainViewModel by viewModel()
+
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+    private val prefs: SharedPreferences by inject(SharedPreferences::class.java)
+
     // Phase 3: Track if coming from editor to scroll to top
     private var cameFromEditor = false
-    
+
     /**
      * BroadcastReceiver for Background-Sync Completion (Periodic Sync)
      */
@@ -81,9 +84,9 @@ class ComposeMainActivity : ComponentActivity() {
         override fun onReceive(context: Context?, intent: Intent?) {
             val success = intent?.getBooleanExtra("success", false) ?: false
             val count = intent?.getIntExtra("count", 0) ?: 0
-            
+
             Logger.d(TAG, "📡 Sync completed broadcast received: success=$success, count=$count")
-            
+
             // UI refresh
             if (success && count > 0) {
                 viewModel.loadNotes()
@@ -91,60 +94,60 @@ class ComposeMainActivity : ComponentActivity() {
             }
         }
     }
-    
+
     override fun onCreate(savedInstanceState: Bundle?) {
         // Install Splash Screen (Android 12+)
         installSplashScreen()
-        
+
         super.onCreate(savedInstanceState)
-        
+
         // Apply Dynamic Colors for Material You (Android 12+)
         DynamicColors.applyToActivityIfAvailable(this)
-        
+
         // Enable edge-to-edge display
         enableEdgeToEdge()
-        
+
         // Initialize Logger and enable file logging if configured
         Logger.init(this)
         if (prefs.getBoolean(Constants.KEY_FILE_LOGGING_ENABLED, false)) {
             Logger.setFileLoggingEnabled(true)
         }
-        
+
         // Clear old sync notifications on app start
         NotificationHelper.clearSyncNotifications(this)
-        
+
         // Request notification permission (Android 13+)
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
             requestNotificationPermission()
         }
-        
+
         // v1.4.1: Migrate checklists for backwards compatibility
         migrateChecklistsForBackwardsCompat()
-        
+
         // Setup Sync State Observer
         setupSyncStateObserver()
-        
+
         setContent {
             SimpleNotesTheme {
                 val context = LocalContext.current
-                
+
                 // Dialog state for delete confirmation
                 var deleteDialogData by remember { mutableStateOf<MainViewModel.DeleteDialogData?>(null) }
-                
+
                 // Handle delete dialog events
                 LaunchedEffect(Unit) {
                     viewModel.showDeleteDialog.collect { data ->
                         deleteDialogData = data
                     }
                 }
-                
+
                 // Handle toast events
                 LaunchedEffect(Unit) {
                     viewModel.showToast.collect { message ->
                         Toast.makeText(context, message, Toast.LENGTH_SHORT).show()
                     }
                 }
-                
+
                 // Delete confirmation dialog
                 deleteDialogData?.let { data ->
                     DeleteConfirmationDialog(
@@ -163,70 +166,70 @@ class ComposeMainActivity : ComponentActivity() {
                         }
                     )
                 }
-                
+
                 MainScreen(
                     viewModel = viewModel,
                     onOpenNote = { noteId -> openNoteEditor(noteId) },
                     onOpenSettings = { openSettings() },
                     onCreateNote = { noteType -> createNote(noteType) }
                 )
-                
+
                 // v1.8.0: Post-Update Changelog (shows once after update)
                 UpdateChangelogSheet()
             }
         }
     }
-    
+
     override fun onResume() {
         super.onResume()
-        
+
         Logger.d(TAG, "📱 ComposeMainActivity.onResume() - Registering receivers")
-        
+
         // 🌟 v1.6.0: Refresh offline mode state FIRST (before any sync checks)
         // This ensures UI reflects current offline mode when returning from Settings
         viewModel.refreshOfflineModeState()
-        
+
         // 🎨 v1.7.0: Refresh display mode when returning from Settings
         viewModel.refreshDisplayMode()
-        
+
         // Register BroadcastReceiver for Background-Sync
         @Suppress("DEPRECATION") // LocalBroadcastManager deprecated but functional
         LocalBroadcastManager.getInstance(this).registerReceiver(
             syncCompletedReceiver,
             IntentFilter(SyncWorker.ACTION_SYNC_COMPLETED)
         )
-        
+
         Logger.d(TAG, "📡 BroadcastReceiver registered (sync-completed)")
-        
+
         // Reload notes
         viewModel.loadNotes()
-        
+
         // Phase 3: Scroll to top if coming from editor (new/edited note)
         if (cameFromEditor) {
             viewModel.scrollToTop()
             cameFromEditor = false
             Logger.d(TAG, "📜 Came from editor - scrolling to top")
         }
-        
+
         // Trigger Auto-Sync on app resume
         viewModel.triggerAutoSync("onResume")
     }
-    
+
     override fun onPause() {
         super.onPause()
-        
+
         // Unregister BroadcastReceiver
         @Suppress("DEPRECATION")
         LocalBroadcastManager.getInstance(this).unregisterReceiver(syncCompletedReceiver)
         Logger.d(TAG, "📡 BroadcastReceiver unregistered")
     }
-    
+
     private fun setupSyncStateObserver() {
         // 🆕 v1.8.0: SyncStatus nur noch für PullToRefresh-Indikator (intern)
         SyncStateManager.syncStatus.observe(this) { status ->
             viewModel.updateSyncState(status)
         }
-        
+
         // 🆕 v1.8.0: Auto-Hide via SyncProgress (einziges Banner-System)
         lifecycleScope.launch {
             SyncStateManager.syncProgress.collect { progress ->
@@ -250,14 +253,14 @@ class ComposeMainActivity : ComponentActivity() {
             }
         }
     }
-    
+
     private fun openNoteEditor(noteId: String?) {
         cameFromEditor = true
         val intent = Intent(this, ComposeNoteEditorActivity::class.java)
         noteId?.let {
             intent.putExtra(ComposeNoteEditorActivity.EXTRA_NOTE_ID, it)
         }
-        
+
         // v1.5.0: Add slide animation
         val options = ActivityOptions.makeCustomAnimation(
             this,
@@ -266,12 +269,12 @@ class ComposeMainActivity : ComponentActivity() {
         )
         startActivity(intent, options.toBundle())
     }
-    
+
     private fun createNote(noteType: NoteType) {
         cameFromEditor = true
         val intent = Intent(this, ComposeNoteEditorActivity::class.java)
         intent.putExtra(ComposeNoteEditorActivity.EXTRA_NOTE_TYPE, noteType.name)
-        
+
         // v1.5.0: Add slide animation
         val options = ActivityOptions.makeCustomAnimation(
             this,
@@ -280,7 +283,7 @@ class ComposeMainActivity : ComponentActivity() {
         )
         startActivity(intent, options.toBundle())
     }
-    
+
     private fun openSettings() {
         val intent = Intent(this, ComposeSettingsActivity::class.java)
         val options = ActivityOptions.makeCustomAnimation(
@@ -291,10 +294,10 @@ class ComposeMainActivity : ComponentActivity() {
         @Suppress("DEPRECATION")
         startActivityForResult(intent, REQUEST_SETTINGS, options.toBundle())
     }
-    
+
     private fun requestNotificationPermission() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            if (checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS) 
+            if (checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS)
                 != PackageManager.PERMISSION_GRANTED) {
                 requestPermissions(
                     arrayOf(Manifest.permission.POST_NOTIFICATIONS),
@@ -303,54 +306,25 @@ class ComposeMainActivity : ComponentActivity() {
             }
         }
     }
-    
+
     /**
      * v1.4.1: Migrates existing checklists for backwards compatibility.
      */
     private fun migrateChecklistsForBackwardsCompat() {
-        val migrationKey = "v1.4.1_checklist_migration_done"
-        
-        // Only run once
-        if (prefs.getBoolean(migrationKey, false)) {
-            return
-        }
-        
-        val storage = NotesStorage(this)
-        val allNotes = storage.loadAllNotes()
-        val checklistsToMigrate = allNotes.filter { note ->
-            note.noteType == NoteType.CHECKLIST && 
-            note.content.isBlank() &&
-            note.checklistItems?.isNotEmpty() == true
-        }
-        
-        if (checklistsToMigrate.isNotEmpty()) {
-            Logger.d(TAG, "🔄 v1.4.1 Migration: Found ${checklistsToMigrate.size} checklists without fallback content")
-            
-            for (note in checklistsToMigrate) {
-                val updatedNote = note.copy(
-                    syncStatus = SyncStatus.PENDING
-                )
-                storage.saveNote(updatedNote)
-                Logger.d(TAG, "   📝 Marked for re-sync: ${note.title}")
-            }
-            
-            Logger.d(TAG, "✅ v1.4.1 Migration: ${checklistsToMigrate.size} checklists marked for re-sync")
-        }
-        
-        // Mark migration as done
-        prefs.edit().putBoolean(migrationKey, true).apply()
+        viewModel.migrateChecklistsForBackwardsCompat()
+
     }
-    
+
     @Deprecated("Deprecated in Java")
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
         super.onActivityResult(requestCode, resultCode, data)
-        
+
         if (requestCode == REQUEST_SETTINGS && resultCode == RESULT_OK) {
             // Settings changed, reload notes
             viewModel.loadNotes()
         }
     }
-    
+
     @Deprecated("Deprecated in API 23", ReplaceWith("Use ActivityResultContracts"))
     @Suppress("DEPRECATION", "OVERRIDE_DEPRECATION")
     override fun onRequestPermissionsResult(
@@ -359,15 +333,15 @@ class ComposeMainActivity : ComponentActivity() {
         grantResults: IntArray
     ) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
-        
+
         when (requestCode) {
             REQUEST_NOTIFICATION_PERMISSION -> {
-                if (grantResults.isNotEmpty() && 
+                if (grantResults.isNotEmpty() &&
                     grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                     Toast.makeText(this, getString(R.string.toast_notifications_enabled), Toast.LENGTH_SHORT).show()
                 } else {
-                    Toast.makeText(this, 
-                        getString(R.string.toast_notifications_disabled), 
+                    Toast.makeText(this,
+                        getString(R.string.toast_notifications_disabled),
                         Toast.LENGTH_SHORT
                     ).show()
                 }
@@ -389,8 +363,8 @@ private fun DeleteConfirmationDialog(
     AlertDialog(
         onDismissRequest = onDismiss,
         title = { Text(stringResource(R.string.legacy_delete_dialog_title)) },
-        text = { 
-            Text(stringResource(R.string.legacy_delete_dialog_message, noteTitle)) 
+        text = {
+            Text(stringResource(R.string.legacy_delete_dialog_message, noteTitle))
         },
         dismissButton = {
             TextButton(onClick = onDismiss) {

android/app/src/main/java/dev/dettmer/simplenotes/ui/main/MainScreen.kt

@@ -59,13 +59,14 @@ import dev.dettmer.simplenotes.ui.main.components.NotesStaggeredGrid
 import dev.dettmer.simplenotes.ui.main.components.SyncProgressBanner
 import dev.dettmer.simplenotes.ui.main.components.SyncStatusLegendDialog
 import kotlinx.coroutines.launch
+import org.koin.androidx.compose.koinViewModel
 
 private const val TIMESTAMP_UPDATE_INTERVAL_MS = 30_000L
 
 /**
  * Main screen displaying the notes list
  * v1.5.0: Jetpack Compose MainActivity Redesign
- * 
+ *
  * Performance optimized with proper state handling:
  * - LazyListState for scroll control
  * - Scaffold FAB slot for proper z-ordering
@@ -74,7 +75,7 @@ private const val TIMESTAMP_UPDATE_INTERVAL_MS = 30_000L
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun MainScreen(
-    viewModel: MainViewModel,
+    viewModel: MainViewModel = koinViewModel(),
     onOpenNote: (String?) -> Unit,
     onOpenSettings: () -> Unit,
     onCreateNote: (NoteType) -> Unit
@@ -82,37 +83,37 @@ fun MainScreen(
     val notes by viewModel.sortedNotes.collectAsState()
     val syncState by viewModel.syncState.collectAsState()
     val scrollToTop by viewModel.scrollToTop.collectAsState()
-    
+
     // 🆕 v1.8.0: Einziges Banner-System
     val syncProgress by viewModel.syncProgress.collectAsState()
-    
+
     // Multi-Select State
     val selectedNotes by viewModel.selectedNotes.collectAsState()
     val isSelectionMode by viewModel.isSelectionMode.collectAsState()
-    
+
     // 🌟 v1.6.0: Reactive offline mode state
     val isOfflineMode by viewModel.isOfflineMode.collectAsState()
-    
+
     // 🎨 v1.7.0: Display mode (list or grid)
     val displayMode by viewModel.displayMode.collectAsState()
-    
+
     // Delete confirmation dialog state
     var showBatchDeleteDialog by remember { mutableStateOf(false) }
-    
+
     // 🆕 v1.8.0: Sync status legend dialog
     var showSyncLegend by remember { mutableStateOf(false) }
-    
+
     // 🔀 v1.8.0: Sort dialog state
     var showSortDialog by remember { mutableStateOf(false) }
     val sortOption by viewModel.sortOption.collectAsState()
     val sortDirection by viewModel.sortDirection.collectAsState()
-    
+
     val snackbarHostState = remember { SnackbarHostState() }
     val scope = rememberCoroutineScope()
     val listState = rememberLazyListState()
     // 🎨 v1.7.0: gridState für Staggered Grid Layout
     val gridState = rememberLazyStaggeredGridState()
-    
+
     // ⏱️ Timestamp ticker - increments every 30 seconds to trigger recomposition of relative times
     var timestampTicker by remember { mutableStateOf(0L) }
     LaunchedEffect(Unit) {
@@ -121,17 +122,17 @@ fun MainScreen(
             timestampTicker = System.currentTimeMillis()
         }
     }
-    
+
     // Compute isSyncing once
     val isSyncing = syncState == SyncStateManager.SyncState.SYNCING
-    
+
     // 🌟 v1.6.0: Reactive sync availability (recomposes when offline mode changes)
     // Note: isOfflineMode is updated via StateFlow from MainViewModel.refreshOfflineModeState()
     // which is called in ComposeMainActivity.onResume() when returning from Settings
     val hasServerConfig = viewModel.hasServerConfig()
     val isSyncAvailable = !isOfflineMode && hasServerConfig
     val canSync = isSyncAvailable && !isSyncing
-    
+
     // Handle snackbar events from ViewModel
     LaunchedEffect(Unit) {
         viewModel.showSnackbar.collect { data ->
@@ -147,7 +148,7 @@ fun MainScreen(
             }
         }
     }
-    
+
     // Phase 3: Scroll to top when new note created
     // 🎨 v1.7.0: Unterstützt beide Display-Modi (list & grid)
     LaunchedEffect(scrollToTop) {
@@ -160,7 +161,7 @@ fun MainScreen(
             viewModel.resetScrollToTop()
         }
     }
-    
+
     // v1.5.0 Hotfix: FAB manuell mit zIndex platzieren für garantierte Sichtbarkeit
     Scaffold(
         topBar = {
@@ -213,7 +214,7 @@ fun MainScreen(
                         progress = syncProgress,
                         modifier = Modifier.fillMaxWidth()
                     )
-                    
+
                     // Content: Empty state or notes list
                     if (notes.isEmpty()) {
                         EmptyState(modifier = Modifier.weight(1f))
@@ -249,7 +250,7 @@ fun MainScreen(
                                 listState = listState,
                                 modifier = Modifier.weight(1f),
                                 onNoteClick = { note -> onOpenNote(note.id) },
-                                onNoteLongPress = { note -> 
+                                onNoteLongPress = { note ->
                                     // Long-press starts selection mode
                                     viewModel.startSelectionMode(note.id)
                                 },
@@ -260,7 +261,7 @@ fun MainScreen(
                         }
                     }
                 }
-                
+
                 // FAB als TOP-LAYER - nur anzeigen wenn nicht im Selection Mode
                 AnimatedVisibility(
                     visible = !isSelectionMode,
@@ -277,7 +278,7 @@ fun MainScreen(
                 }
             }
         }
-        
+
         // Batch Delete Confirmation Dialog
         if (showBatchDeleteDialog) {
             DeleteConfirmationDialog(
@@ -294,14 +295,14 @@ fun MainScreen(
                 }
             )
         }
-        
+
         // 🆕 v1.8.0: Sync Status Legend Dialog
         if (showSyncLegend) {
             SyncStatusLegendDialog(
                 onDismiss = { showSyncLegend = false }
             )
         }
-        
+
         // 🔀 v1.8.0: Sort Dialog
         if (showSortDialog) {
             SortDialog(
@@ -344,7 +345,7 @@ private fun MainTopBar(
                     contentDescription = stringResource(R.string.sort_notes)
                 )
             }
-            
+
             // 🆕 v1.8.0: Sync Status Legend Button (nur wenn Sync verfügbar)
             if (showSyncLegend) {
                 IconButton(onClick = onSyncLegendClick) {

android/app/src/main/java/dev/dettmer/simplenotes/ui/main/MainViewModel.kt

@@ -2,12 +2,15 @@ package dev.dettmer.simplenotes.ui.main
 
 import android.app.Application
 import android.content.Context
+import android.content.SharedPreferences
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
 import dev.dettmer.simplenotes.models.Note
 import dev.dettmer.simplenotes.models.SortDirection
 import dev.dettmer.simplenotes.models.SortOption
 import dev.dettmer.simplenotes.R
+import dev.dettmer.simplenotes.models.NoteType
+import dev.dettmer.simplenotes.models.SyncStatus
 import dev.dettmer.simplenotes.storage.NotesStorage
 import dev.dettmer.simplenotes.sync.SyncProgress
 import dev.dettmer.simplenotes.sync.SyncStateManager
@@ -27,54 +30,56 @@ import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import org.koin.java.KoinJavaComponent.inject
+import kotlin.getValue
 
 /**
  * ViewModel for MainActivity Compose
  * v1.5.0: Jetpack Compose MainActivity Redesign
- * 
+ *
  * Manages notes list, sync state, and deletion with undo.
  */
 class MainViewModel(application: Application) : AndroidViewModel(application) {
-    
+
     companion object {
         private const val TAG = "MainViewModel"
         private const val MIN_AUTO_SYNC_INTERVAL_MS = 60_000L // 1 Minute
         private const val PREF_LAST_AUTO_SYNC_TIME = "last_auto_sync_timestamp"
     }
-    
-    private val storage = NotesStorage(application)
-    private val prefs = application.getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
-    
+
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+    private val prefs: SharedPreferences by inject(SharedPreferences::class.java)
+
     // ═══════════════════════════════════════════════════════════════════════
     // Notes State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _notes = MutableStateFlow<List<Note>>(emptyList())
     val notes: StateFlow<List<Note>> = _notes.asStateFlow()
-    
+
     private val _pendingDeletions = MutableStateFlow<Set<String>>(emptySet())
     val pendingDeletions: StateFlow<Set<String>> = _pendingDeletions.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Multi-Select State (v1.5.0)
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _selectedNotes = MutableStateFlow<Set<String>>(emptySet())
     val selectedNotes: StateFlow<Set<String>> = _selectedNotes.asStateFlow()
-    
+
     val isSelectionMode: StateFlow<Boolean> = _selectedNotes
         .map { it.isNotEmpty() }
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), false)
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🌟 v1.6.0: Offline Mode State (reactive)
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _isOfflineMode = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_OFFLINE_MODE, true)
     )
     val isOfflineMode: StateFlow<Boolean> = _isOfflineMode.asStateFlow()
-    
+
     /**
      * Refresh offline mode state from SharedPreferences
      * Called when returning from Settings screen (in onResume)
@@ -85,16 +90,16 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         _isOfflineMode.value = newValue
         Logger.d(TAG, "🔄 refreshOfflineModeState: offlineMode=$oldValue → $newValue")
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🎨 v1.7.0: Display Mode State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _displayMode = MutableStateFlow(
         prefs.getString(Constants.KEY_DISPLAY_MODE, Constants.DEFAULT_DISPLAY_MODE) ?: Constants.DEFAULT_DISPLAY_MODE
     )
     val displayMode: StateFlow<String> = _displayMode.asStateFlow()
-    
+
     /**
      * Refresh display mode from SharedPreferences
      * Called when returning from Settings screen
@@ -104,25 +109,25 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         _displayMode.value = newValue
         Logger.d(TAG, "🔄 refreshDisplayMode: displayMode=${_displayMode.value} → $newValue")
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🔀 v1.8.0: Sort State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _sortOption = MutableStateFlow(
         SortOption.fromPrefsValue(
             prefs.getString(Constants.KEY_SORT_OPTION, Constants.DEFAULT_SORT_OPTION) ?: Constants.DEFAULT_SORT_OPTION
         )
     )
     val sortOption: StateFlow<SortOption> = _sortOption.asStateFlow()
-    
+
     private val _sortDirection = MutableStateFlow(
         SortDirection.fromPrefsValue(
             prefs.getString(Constants.KEY_SORT_DIRECTION, Constants.DEFAULT_SORT_DIRECTION) ?: Constants.DEFAULT_SORT_DIRECTION
         )
     )
     val sortDirection: StateFlow<SortDirection> = _sortDirection.asStateFlow()
-    
+
     /**
      * 🔀 v1.8.0: Sortierte Notizen — kombiniert aus Notes + SortOption + SortDirection.
      * Reagiert automatisch auf Änderungen in allen drei Flows.
@@ -138,68 +143,68 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         started = SharingStarted.WhileSubscribed(5_000),
         initialValue = emptyList()
     )
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Sync State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     // 🆕 v1.8.0: Einziges Banner-System - SyncProgress
     val syncProgress: StateFlow<SyncProgress> = SyncStateManager.syncProgress
-    
+
     // Intern: SyncState für PullToRefresh-Indikator
     private val _syncState = MutableStateFlow(SyncStateManager.SyncState.IDLE)
     val syncState: StateFlow<SyncStateManager.SyncState> = _syncState.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // UI Events
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _showToast = MutableSharedFlow<String>()
     val showToast: SharedFlow<String> = _showToast.asSharedFlow()
-    
+
     private val _showDeleteDialog = MutableSharedFlow<DeleteDialogData>()
     val showDeleteDialog: SharedFlow<DeleteDialogData> = _showDeleteDialog.asSharedFlow()
-    
+
     private val _showSnackbar = MutableSharedFlow<SnackbarData>()
     val showSnackbar: SharedFlow<SnackbarData> = _showSnackbar.asSharedFlow()
-    
+
     // Phase 3: Scroll-to-top when new note is created
     private val _scrollToTop = MutableStateFlow(false)
     val scrollToTop: StateFlow<Boolean> = _scrollToTop.asStateFlow()
-    
+
     // Track first note ID to detect new notes
     private var previousFirstNoteId: String? = null
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Data Classes
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     data class DeleteDialogData(
         val note: Note,
         val originalList: List<Note>
     )
-    
+
     data class SnackbarData(
         val message: String,
         val actionLabel: String,
         val onAction: () -> Unit
     )
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Initialization
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     init {
         // v1.5.0 Performance: Load notes asynchronously to avoid blocking UI
         viewModelScope.launch(Dispatchers.IO) {
             loadNotesAsync()
         }
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Notes Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     /**
      * Load notes asynchronously on IO dispatcher
      * This prevents UI blocking during app startup
@@ -208,23 +213,23 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         val allNotes = storage.loadAllNotes()
         val pendingIds = _pendingDeletions.value
         val filteredNotes = allNotes.filter { it.id !in pendingIds }
-        
+
         withContext(Dispatchers.Main) {
             // Phase 3: Detect if a new note was added at the top
             val newFirstNoteId = filteredNotes.firstOrNull()?.id
-            if (newFirstNoteId != null && 
-                previousFirstNoteId != null && 
+            if (newFirstNoteId != null &&
+                previousFirstNoteId != null &&
                 newFirstNoteId != previousFirstNoteId) {
                 // New note at top → trigger scroll
                 _scrollToTop.value = true
                 Logger.d(TAG, "📜 New note detected at top, triggering scroll-to-top")
             }
             previousFirstNoteId = newFirstNoteId
-            
+
             _notes.value = filteredNotes
         }
     }
-    
+
     /**
      * Public loadNotes - delegates to async version
      */
@@ -233,25 +238,25 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             loadNotesAsync()
         }
     }
-    
+
     /**
      * Reset scroll-to-top flag after scroll completed
      */
     fun resetScrollToTop() {
         _scrollToTop.value = false
     }
-    
+
     /**
      * Force scroll to top (e.g., after returning from editor)
      */
     fun scrollToTop() {
         _scrollToTop.value = true
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Multi-Select Actions (v1.5.0)
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     /**
      * Toggle selection of a note
      */
@@ -262,56 +267,56 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             _selectedNotes.value + noteId
         }
     }
-    
+
     /**
      * Start selection mode with initial note
      */
     fun startSelectionMode(noteId: String) {
         _selectedNotes.value = setOf(noteId)
     }
-    
+
     /**
      * Select all notes
      */
     fun selectAllNotes() {
         _selectedNotes.value = _notes.value.map { it.id }.toSet()
     }
-    
+
     /**
      * Clear selection and exit selection mode
      */
     fun clearSelection() {
         _selectedNotes.value = emptySet()
     }
-    
+
     /**
      * Get count of selected notes
      */
     fun getSelectedCount(): Int = _selectedNotes.value.size
-    
+
     /**
      * Delete all selected notes
      */
-    fun deleteSelectedNotes(deleteFromServer: Boolean) {
+    fun deleteSelectedNotes(deleteFromServer: Boolean) = viewModelScope.launch {
         val selectedIds = _selectedNotes.value.toList()
         val selectedNotes = _notes.value.filter { it.id in selectedIds }
-        
-        if (selectedNotes.isEmpty()) return
-        
+
+        if (selectedNotes.isEmpty()) return@launch
+
         // Add to pending deletions
         _pendingDeletions.value = _pendingDeletions.value + selectedIds.toSet()
-        
+
         // Delete from storage
         selectedNotes.forEach { note ->
             storage.deleteNote(note.id)
         }
-        
+
         // Clear selection
         clearSelection()
-        
+
         // Reload notes
         loadNotes()
-        
+
         // Show snackbar with undo
         val count = selectedNotes.size
         val message = if (deleteFromServer) {
@@ -319,7 +324,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         } else {
             getString(R.string.snackbar_notes_deleted_local, count)
         }
-        
+
         viewModelScope.launch {
             _showSnackbar.emit(SnackbarData(
                 message = message,
@@ -328,7 +333,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                     undoDeleteMultiple(selectedNotes)
                 }
             ))
-            
+
             @Suppress("MagicNumber") // Snackbar timing coordination
             // If delete from server, actually delete after a short delay
             // (to allow undo action before server deletion)
@@ -347,19 +352,19 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-    
+
     /**
      * Undo deletion of multiple notes
      */
-    private fun undoDeleteMultiple(notes: List<Note>) {
+    private fun undoDeleteMultiple(notes: List<Note>) = viewModelScope.launch{
         // Remove from pending deletions
         _pendingDeletions.value = _pendingDeletions.value - notes.map { it.id }.toSet()
-        
+
         // Restore to storage
         notes.forEach { note ->
             storage.saveNote(note)
         }
-        
+
         // Reload notes
         loadNotes()
     }
@@ -370,10 +375,10 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
      */
     fun onNoteLongPressDelete(note: Note) {
         val alwaysDeleteFromServer = prefs.getBoolean(Constants.KEY_ALWAYS_DELETE_FROM_SERVER, false)
-        
+
         // Store original list for potential restore
         val originalList = _notes.value.toList()
-        
+
         if (alwaysDeleteFromServer) {
             // Auto-delete without dialog
             deleteNoteConfirmed(note, deleteFromServer = true)
@@ -392,34 +397,34 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
     fun onNoteSwipedToDelete(note: Note) {
         onNoteLongPressDelete(note)  // Delegate to long-press handler
     }
-    
+
     /**
      * Restore note after swipe (user cancelled dialog)
      */
     fun restoreNoteAfterSwipe(originalList: List<Note>) {
         _notes.value = originalList
     }
-    
+
     /**
      * Confirm note deletion (from dialog or auto-delete)
      */
-    fun deleteNoteConfirmed(note: Note, deleteFromServer: Boolean) {
+    fun deleteNoteConfirmed(note: Note, deleteFromServer: Boolean) = viewModelScope.launch{
         // Add to pending deletions
         _pendingDeletions.value = _pendingDeletions.value + note.id
-        
+
         // Delete from storage
         storage.deleteNote(note.id)
-        
+
         // Reload notes
         loadNotes()
-        
+
         // Show snackbar with undo
         val message = if (deleteFromServer) {
             getString(R.string.snackbar_note_deleted_server, note.title)
         } else {
             getString(R.string.snackbar_note_deleted_local, note.title)
         }
-        
+
         viewModelScope.launch {
             _showSnackbar.emit(SnackbarData(
                 message = message,
@@ -428,7 +433,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                     undoDelete(note)
                 }
             ))
-            
+
             @Suppress("MagicNumber") // Snackbar timing
             // If delete from server, actually delete after snackbar timeout
             if (deleteFromServer) {
@@ -443,21 +448,21 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-    
+
     /**
      * Undo note deletion
      */
-    fun undoDelete(note: Note) {
+    fun undoDelete(note: Note) = viewModelScope.launch{
         // Remove from pending deletions
         _pendingDeletions.value = _pendingDeletions.value - note.id
-        
+
         // Restore to storage
         storage.saveNote(note)
-        
+
         // Reload notes
         loadNotes()
     }
-    
+
     /**
      * Actually delete note from server after snackbar dismissed
      */
@@ -468,7 +473,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                 val success = withContext(Dispatchers.IO) {
                     webdavService.deleteNoteFromServer(noteId)
                 }
-                
+
                 if (success) {
                     // 🆕 v1.8.1 (IMPL_12): Toast → Banner INFO
                     SyncStateManager.showInfo(getString(R.string.snackbar_deleted_from_server))
@@ -483,7 +488,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-    
+
     /**
      * Delete multiple notes from server with aggregated toast
      * Shows single toast at the end instead of one per note
@@ -493,7 +498,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             val webdavService = WebDavSyncService(getApplication())
             var successCount = 0
             var failCount = 0
-            
+
             noteIds.forEach { noteId ->
                 try {
                     val success = withContext(Dispatchers.IO) {
@@ -507,7 +512,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                     _pendingDeletions.value = _pendingDeletions.value - noteId
                 }
             }
-            
+
             // 🆕 v1.8.1 (IMPL_12): Toast → Banner INFO/ERROR
             val message = when {
                 failCount == 0 -> getString(R.string.snackbar_notes_deleted_from_server, successCount)
@@ -525,22 +530,22 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-    
+
     /**
      * Finalize deletion (remove from pending set)
      */
     fun finalizeDeletion(noteId: String) {
         _pendingDeletions.value = _pendingDeletions.value - noteId
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Sync Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     fun updateSyncState(status: SyncStateManager.SyncStatus) {
         _syncState.value = status.state
     }
-    
+
     /**
      * Trigger manual sync (from toolbar button or pull-to-refresh)
      * v1.7.0: Uses central canSync() gate for WiFi-only check
@@ -559,14 +564,14 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
             return
         }
-        
+
         // 🆕 v1.8.1 (IMPL_08): Globalen Cooldown markieren (verhindert Auto-Sync direkt danach)
         // Manueller Sync prüft NICHT den globalen Cooldown (User will explizit synchronisieren)
         val prefs = getApplication<android.app.Application>().getSharedPreferences(
             Constants.PREFS_NAME,
             android.content.Context.MODE_PRIVATE
         )
-        
+
         // 🆕 v1.7.0: Feedback wenn Sync bereits läuft
         // 🆕 v1.8.0: tryStartSync setzt sofort PREPARING → Banner erscheint instant
         if (!SyncStateManager.tryStartSync(source)) {
@@ -582,10 +587,10 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
             return
         }
-        
+
         // 🆕 v1.8.1 (IMPL_08): Globalen Cooldown markieren (nach tryStartSync, vor Launch)
         SyncStateManager.markGlobalSyncStarted(prefs)
-        
+
         viewModelScope.launch {
             try {
                 // Check for unsynced changes (Banner zeigt bereits PREPARING)
@@ -595,23 +600,23 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                     loadNotes()
                     return@launch
                 }
-                
+
                 // Check server reachability
                 val isReachable = withContext(Dispatchers.IO) {
                     syncService.isServerReachable()
                 }
-                
+
                 if (!isReachable) {
                     Logger.d(TAG, "⏭️ $source Sync: Server not reachable")
                     SyncStateManager.markError(getString(R.string.snackbar_server_unreachable))
                     return@launch
                 }
-                
+
                 // Perform sync
                 val result = withContext(Dispatchers.IO) {
                     syncService.syncNotes()
                 }
-                
+
                 if (result.isSuccess) {
                     // 🆕 v1.8.0 (IMPL_022): Erweiterte Banner-Nachricht mit Löschungen
                     val bannerMessage = buildString {
@@ -636,7 +641,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-    
+
     /**
      * Trigger auto-sync (onResume)
      * Only runs if server is configured and interval has passed
@@ -650,17 +655,17 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             Logger.d(TAG, "⏭️ onResume sync disabled - skipping")
             return
         }
-        
+
         // 🆕 v1.8.1 (IMPL_08): Globaler Sync-Cooldown (alle Trigger teilen sich diesen)
         if (!SyncStateManager.canSyncGlobally(prefs)) {
             return
         }
-        
+
         // Throttling check (eigener 60s-Cooldown für onResume)
         if (!canTriggerAutoSync()) {
             return
         }
-        
+
         // 🆕 v1.7.0: Zentrale Sync-Gate Prüfung (inkl. WiFi-Only, Offline Mode, Server Config)
         val syncService = WebDavSyncService(getApplication())
         val gateResult = syncService.canSync()
@@ -672,22 +677,22 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
             return
         }
-        
+
         // v1.5.0: silent=true → kein Banner bei Auto-Sync
         // 🆕 v1.8.0: tryStartSync mit silent=true → SyncProgress.silent=true → Banner unsichtbar
         if (!SyncStateManager.tryStartSync("auto-$source", silent = true)) {
             Logger.d(TAG, "⏭️ Auto-sync ($source): Another sync already in progress")
             return
         }
-        
+
         Logger.d(TAG, "🔄 Auto-sync triggered ($source)")
-        
+
         // Update last sync timestamp
         prefs.edit().putLong(PREF_LAST_AUTO_SYNC_TIME, System.currentTimeMillis()).apply()
-        
+
         // 🆕 v1.8.1 (IMPL_08): Globalen Sync-Cooldown markieren
         SyncStateManager.markGlobalSyncStarted(prefs)
-        
+
         viewModelScope.launch {
             try {
                 // Check for unsynced changes
@@ -696,23 +701,23 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                     SyncStateManager.reset()  // Silent → geht direkt auf IDLE
                     return@launch
                 }
-                
+
                 // Check server reachability
                 val isReachable = withContext(Dispatchers.IO) {
                     syncService.isServerReachable()
                 }
-                
+
                 if (!isReachable) {
                     Logger.d(TAG, "⏭️ Auto-sync ($source): Server not reachable - skipping silently")
                     SyncStateManager.reset()  // Silent → kein Error-Banner
                     return@launch
                 }
-                
+
                 // Perform sync
                 val result = withContext(Dispatchers.IO) {
                     syncService.syncNotes()
                 }
-                
+
                 if (result.isSuccess && result.syncedCount > 0) {
                     Logger.d(TAG, "✅ Auto-sync successful ($source): ${result.syncedCount} notes")
                     // 🆕 v1.8.1 (IMPL_11): Kein Toast bei Silent-Sync
@@ -734,25 +739,25 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             }
         }
     }
-    
+
     private fun canTriggerAutoSync(): Boolean {
         val lastSyncTime = prefs.getLong(PREF_LAST_AUTO_SYNC_TIME, 0)
         val now = System.currentTimeMillis()
         val timeSinceLastSync = now - lastSyncTime
-        
+
         if (timeSinceLastSync < MIN_AUTO_SYNC_INTERVAL_MS) {
             val remainingSeconds = (MIN_AUTO_SYNC_INTERVAL_MS - timeSinceLastSync) / 1000
             Logger.d(TAG, "⏳ Auto-sync throttled - wait ${remainingSeconds}s")
             return false
         }
-        
+
         return true
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🔀 v1.8.0: Sortierung
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     /**
      * 🔀 v1.8.0: Sortiert Notizen nach gewählter Option und Richtung.
      */
@@ -768,13 +773,13 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             SortOption.NOTE_TYPE -> compareBy<Note> { it.noteType.ordinal }
                 .thenByDescending { it.updatedAt }  // Sekundär: Datum innerhalb gleicher Typen
         }
-        
+
         return when (direction) {
             SortDirection.ASCENDING -> notes.sortedWith(comparator)
             SortDirection.DESCENDING -> notes.sortedWith(comparator.reversed())
         }
     }
-    
+
     /**
      * 🔀 v1.8.0: Setzt die Sortieroption und speichert in SharedPreferences.
      */
@@ -783,7 +788,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         prefs.edit().putString(Constants.KEY_SORT_OPTION, option.prefsValue).apply()
         Logger.d(TAG, "🔀 Sort option changed to: ${option.prefsValue}")
     }
-    
+
     /**
      * 🔀 v1.8.0: Setzt die Sortierrichtung und speichert in SharedPreferences.
      */
@@ -792,7 +797,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         prefs.edit().putString(Constants.KEY_SORT_DIRECTION, direction.prefsValue).apply()
         Logger.d(TAG, "🔀 Sort direction changed to: ${direction.prefsValue}")
     }
-    
+
     /**
      * 🔀 v1.8.0: Toggelt die Sortierrichtung.
      */
@@ -800,16 +805,16 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         val newDirection = _sortDirection.value.toggle()
         setSortDirection(newDirection)
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Helpers
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private fun getString(resId: Int): String = getApplication<android.app.Application>().getString(resId)
-    
-    private fun getString(resId: Int, vararg formatArgs: Any): String = 
+
+    private fun getString(resId: Int, vararg formatArgs: Any): String =
         getApplication<android.app.Application>().getString(resId, *formatArgs)
-    
+
     fun isServerConfigured(): Boolean {
         // 🌟 v1.6.0: Use reactive offline mode state
         if (_isOfflineMode.value) {
@@ -818,7 +823,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
         return !serverUrl.isNullOrEmpty() && serverUrl != "http://" && serverUrl != "https://"
     }
-    
+
     /**
      * 🌟 v1.6.0: Check if server has a configured URL (ignores offline mode)
      * Used for determining if sync would be available when offline mode is disabled
@@ -827,4 +832,37 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
         return !serverUrl.isNullOrEmpty() && serverUrl != "http://" && serverUrl != "https://"
     }
+
+    fun migrateChecklistsForBackwardsCompat() = viewModelScope.launch{
+        val migrationKey = "v1.4.1_checklist_migration_done"
+
+        // Only run once
+        if (prefs.getBoolean(migrationKey, false)) {
+            return@launch
+        }
+
+        val allNotes = storage.loadAllNotes()
+        val checklistsToMigrate = allNotes.filter { note ->
+            note.noteType == NoteType.CHECKLIST &&
+                note.content.isBlank() &&
+                note.checklistItems?.isNotEmpty() == true
+        }
+
+        if (checklistsToMigrate.isNotEmpty()) {
+            Logger.d(TAG, "🔄 v1.4.1 Migration: Found ${checklistsToMigrate.size} checklists without fallback content")
+
+            for (note in checklistsToMigrate) {
+                val updatedNote = note.copy(
+                    syncStatus = SyncStatus.PENDING
+                )
+                storage.saveNote(updatedNote)
+                Logger.d(TAG, "   📝 Marked for re-sync: ${note.title}")
+            }
+
+            Logger.d(TAG, "✅ v1.4.1 Migration: ${checklistsToMigrate.size} checklists marked for re-sync")
+        }
+
+        // Mark migration as done
+        prefs.edit().putBoolean(migrationKey, true).apply()
+    }
 }

android/app/src/main/java/dev/dettmer/simplenotes/ui/settings/SettingsViewModel.kt

@@ -2,6 +2,7 @@ package dev.dettmer.simplenotes.ui.settings
 
 import android.app.Application
 import android.content.Context
+import android.content.SharedPreferences
 import android.net.Uri
 import android.util.Log
 import androidx.lifecycle.AndroidViewModel
@@ -26,45 +27,47 @@ import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import org.koin.java.KoinJavaComponent.inject
 import java.net.HttpURLConnection
 import java.net.URL
+import kotlin.getValue
 
 /**
  * ViewModel for Settings screens
  * v1.5.0: Jetpack Compose Settings Redesign
- * 
+ *
  * Manages all settings state and actions across the Settings navigation graph.
  */
 @Suppress("TooManyFunctions") // v1.7.0: 35 Funktionen durch viele kleine Setter (setTrigger*, set*)
 class SettingsViewModel(application: Application) : AndroidViewModel(application) {
-    
+
     companion object {
         private const val TAG = "SettingsViewModel"
         private const val CONNECTION_TIMEOUT_MS = 3000
         private const val STATUS_CLEAR_DELAY_SUCCESS_MS = 2000L  // 2s for successful operations
         private const val STATUS_CLEAR_DELAY_ERROR_MS = 3000L    // 3s for errors (more important)
     }
-    
-    private val prefs = application.getSharedPreferences(Constants.PREFS_NAME, Context.MODE_PRIVATE)
+
     val backupManager = BackupManager(application)
-    private val notesStorage = NotesStorage(application) // v1.7.0: For server change detection
-    
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+    private val prefs: SharedPreferences by inject(SharedPreferences::class.java)
+
     // 🔧 v1.7.0 Hotfix: Track last confirmed server URL for change detection
     // This prevents false-positive "server changed" toasts during text input
     private var confirmedServerUrl: String = prefs.getString(Constants.KEY_SERVER_URL, "") ?: ""
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Server Settings State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     // v1.5.0 Fix: Initialize URL with protocol prefix if empty
     private val storedUrl = prefs.getString(Constants.KEY_SERVER_URL, "") ?: ""
-    
+
     // 🌟 v1.6.0: Separate host from prefix for better UX
     // isHttps determines the prefix, serverHost is the editable part
     private val _isHttps = MutableStateFlow(storedUrl.startsWith("https://"))
     val isHttps: StateFlow<Boolean> = _isHttps.asStateFlow()
-    
+
     // Extract host part (everything after http:// or https://)
     private fun extractHostFromUrl(url: String): String {
         return when {
@@ -73,26 +76,26 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             else -> url
         }
     }
-    
+
     // 🌟 v1.6.0: Only the host part is editable (without protocol prefix)
     private val _serverHost = MutableStateFlow(extractHostFromUrl(storedUrl))
     val serverHost: StateFlow<String> = _serverHost.asStateFlow()
-    
+
     // 🌟 v1.6.0: Full URL for display purposes (computed from prefix + host)
     val serverUrl: StateFlow<String> = combine(_isHttps, _serverHost) { https, host ->
         val prefix = if (https) "https://" else "http://"
         if (host.isEmpty()) "" else prefix + host
     }.stateIn(viewModelScope, SharingStarted.Eagerly, storedUrl)
-    
+
     private val _username = MutableStateFlow(prefs.getString(Constants.KEY_USERNAME, "") ?: "")
     val username: StateFlow<String> = _username.asStateFlow()
-    
+
     private val _password = MutableStateFlow(prefs.getString(Constants.KEY_PASSWORD, "") ?: "")
     val password: StateFlow<String> = _password.asStateFlow()
-    
+
     private val _serverStatus = MutableStateFlow<ServerStatus>(ServerStatus.Unknown)
     val serverStatus: StateFlow<ServerStatus> = _serverStatus.asStateFlow()
-    
+
     // 🌟 v1.6.0: Offline Mode Toggle
     // Default: true for new users (no server), false for existing users (has server config)
     private val _offlineMode = MutableStateFlow(
@@ -104,35 +107,35 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         }
     )
     val offlineMode: StateFlow<Boolean> = _offlineMode.asStateFlow()
-    
+
     private fun hasExistingServerConfig(): Boolean {
         val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
-        return !serverUrl.isNullOrEmpty() && 
-               serverUrl != "http://" && 
+        return !serverUrl.isNullOrEmpty() &&
+               serverUrl != "http://" &&
                serverUrl != "https://"
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Events (for Activity-level actions like dialogs, intents)
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _events = MutableSharedFlow<SettingsEvent>()
     val events: SharedFlow<SettingsEvent> = _events.asSharedFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Markdown Export Progress State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _markdownExportProgress = MutableStateFlow<MarkdownExportProgress?>(null)
     val markdownExportProgress: StateFlow<MarkdownExportProgress?> = _markdownExportProgress.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Sync Settings State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _autoSyncEnabled = MutableStateFlow(prefs.getBoolean(Constants.KEY_AUTO_SYNC, false))
     val autoSyncEnabled: StateFlow<Boolean> = _autoSyncEnabled.asStateFlow()
-    
+
     private val _syncInterval = MutableStateFlow(
         prefs.getLong(Constants.PREF_SYNC_INTERVAL_MINUTES, Constants.DEFAULT_SYNC_INTERVAL_MINUTES)
     )
@@ -149,82 +152,82 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         prefs.getBoolean(Constants.KEY_SYNC_TRIGGER_ON_SAVE, Constants.DEFAULT_TRIGGER_ON_SAVE)
     )
     val triggerOnSave: StateFlow<Boolean> = _triggerOnSave.asStateFlow()
-    
+
     private val _triggerOnResume = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_SYNC_TRIGGER_ON_RESUME, Constants.DEFAULT_TRIGGER_ON_RESUME)
     )
     val triggerOnResume: StateFlow<Boolean> = _triggerOnResume.asStateFlow()
-    
+
     private val _triggerWifiConnect = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_SYNC_TRIGGER_WIFI_CONNECT, Constants.DEFAULT_TRIGGER_WIFI_CONNECT)
     )
     val triggerWifiConnect: StateFlow<Boolean> = _triggerWifiConnect.asStateFlow()
-    
+
     private val _triggerPeriodic = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_SYNC_TRIGGER_PERIODIC, Constants.DEFAULT_TRIGGER_PERIODIC)
     )
     val triggerPeriodic: StateFlow<Boolean> = _triggerPeriodic.asStateFlow()
-    
+
     private val _triggerBoot = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_SYNC_TRIGGER_BOOT, Constants.DEFAULT_TRIGGER_BOOT)
     )
     val triggerBoot: StateFlow<Boolean> = _triggerBoot.asStateFlow()
-    
+
     // 🎉 v1.7.0: WiFi-Only Sync Toggle
     private val _wifiOnlySync = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_WIFI_ONLY_SYNC, Constants.DEFAULT_WIFI_ONLY_SYNC)
     )
     val wifiOnlySync: StateFlow<Boolean> = _wifiOnlySync.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Markdown Settings State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _markdownAutoSync = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_MARKDOWN_EXPORT, false) &&
         prefs.getBoolean(Constants.KEY_MARKDOWN_AUTO_IMPORT, false)
     )
     val markdownAutoSync: StateFlow<Boolean> = _markdownAutoSync.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Debug Settings State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _fileLoggingEnabled = MutableStateFlow(
         prefs.getBoolean(Constants.KEY_FILE_LOGGING_ENABLED, false)
     )
     val fileLoggingEnabled: StateFlow<Boolean> = _fileLoggingEnabled.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🎨 v1.7.0: Display Settings State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _displayMode = MutableStateFlow(
         prefs.getString(Constants.KEY_DISPLAY_MODE, Constants.DEFAULT_DISPLAY_MODE) ?: Constants.DEFAULT_DISPLAY_MODE
     )
     val displayMode: StateFlow<String> = _displayMode.asStateFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // UI State
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     private val _isSyncing = MutableStateFlow(false)
     val isSyncing: StateFlow<Boolean> = _isSyncing.asStateFlow()
-    
+
     private val _isBackupInProgress = MutableStateFlow(false)
     val isBackupInProgress: StateFlow<Boolean> = _isBackupInProgress.asStateFlow()
-    
+
     // v1.8.0: Descriptive backup status text
     private val _backupStatusText = MutableStateFlow("")
     val backupStatusText: StateFlow<String> = _backupStatusText.asStateFlow()
-    
+
     private val _showToast = MutableSharedFlow<String>()
     val showToast: SharedFlow<String> = _showToast.asSharedFlow()
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Server Settings Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     /**
      * v1.6.0: Set offline mode on/off
      * When enabled, all network features are disabled
@@ -232,7 +235,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     fun setOfflineMode(enabled: Boolean) {
         _offlineMode.value = enabled
         prefs.edit().putBoolean(Constants.KEY_OFFLINE_MODE, enabled).apply()
-        
+
         if (enabled) {
             _serverStatus.value = ServerStatus.OfflineMode
         } else {
@@ -240,14 +243,14 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             checkServerStatus()
         }
     }
-    
+
     fun updateServerUrl(url: String) {
         // 🌟 v1.6.0: Deprecated - use updateServerHost instead
         // This function is kept for compatibility but now delegates to updateServerHost
         val host = extractHostFromUrl(url)
         updateServerHost(host)
     }
-    
+
     /**
      * 🌟 v1.6.0: Update only the host part of the server URL
      * The protocol prefix is handled separately by updateProtocol()
@@ -257,37 +260,37 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
      */
     fun updateServerHost(host: String) {
         _serverHost.value = host
-        
+
         // ✅ Save immediately for WebDavSyncService, but WITHOUT server-change detection
         val prefix = if (_isHttps.value) "https://" else "http://"
         val fullUrl = if (host.isEmpty()) "" else prefix + host
         prefs.edit().putString(Constants.KEY_SERVER_URL, fullUrl).apply()
     }
-    
+
     fun updateProtocol(useHttps: Boolean) {
         _isHttps.value = useHttps
         // 🌟 v1.6.0: Host stays the same, only prefix changes
         // 🔧 v1.7.0 Hotfix: Removed auto-save to prevent false server-change detection
         // 🔧 v1.7.0 Regression Fix: Restore immediate SharedPrefs write (for WebDavSyncService)
-        
+
         // ✅ Save immediately for WebDavSyncService, but WITHOUT server-change detection
         val prefix = if (useHttps) "https://" else "http://"
         val fullUrl = if (_serverHost.value.isEmpty()) "" else prefix + _serverHost.value
         prefs.edit().putString(Constants.KEY_SERVER_URL, fullUrl).apply()
     }
-    
+
     fun updateUsername(value: String) {
         _username.value = value
         // 🔧 v1.7.0 Regression Fix: Restore immediate SharedPrefs write (for WebDavSyncService)
         prefs.edit().putString(Constants.KEY_USERNAME, value).apply()
     }
-    
+
     fun updatePassword(value: String) {
         _password.value = value
         // 🔧 v1.7.0 Regression Fix: Restore immediate SharedPrefs write (for WebDavSyncService)
         prefs.edit().putString(Constants.KEY_PASSWORD, value).apply()
     }
-    
+
     /**
      * 🔧 v1.7.0 Hotfix: Manual save function - only called when leaving settings screen
      * This prevents false "server changed" detection during text input
@@ -298,17 +301,17 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         // 🌟 v1.6.0: Construct full URL from prefix + host
         val prefix = if (_isHttps.value) "https://" else "http://"
         val fullUrl = if (_serverHost.value.isEmpty()) "" else prefix + _serverHost.value
-        
+
         // 🔄 v1.7.0: Detect server change ONLY against last confirmed URL
         val serverChanged = isServerReallyChanged(confirmedServerUrl, fullUrl)
-        
+
         // ✅ Settings are already saved in updateServerHost/Protocol/Username/Password
         // This function now ONLY handles server-change detection
-        
+
         // Reset sync status if server actually changed
         if (serverChanged) {
             viewModelScope.launch {
-                val count = notesStorage.resetAllSyncStatusToPending()
+                val count = storage.resetAllSyncStatusToPending()
                 Logger.d(TAG, "🔄 Server changed from '$confirmedServerUrl' to '$fullUrl': Reset $count notes to PENDING")
                 emitToast(getString(R.string.toast_server_changed_sync_reset, count))
             }
@@ -318,10 +321,10 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             Logger.d(TAG, "💾 Server settings check complete (no server change detected)")
         }
     }
-    
+
     /**
      * <20> v1.7.0 Hotfix: Improved server change detection
-     * 
+     *
      * Only returns true if the server URL actually changed in a meaningful way.
      * Handles edge cases:
      * - First setup (empty → filled) = NOT a change
@@ -336,23 +339,23 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             Logger.d(TAG, "First server setup detected (no reset needed)")
             return false
         }
-        
+
         // Both empty = No change
         if (confirmedUrl.isEmpty() && newUrl.isEmpty()) {
             return false
         }
-        
+
         // Non-empty → Empty = Server removed (keep notes local, no reset)
         if (confirmedUrl.isNotEmpty() && newUrl.isEmpty()) {
             Logger.d(TAG, "Server removed (notes stay local, no reset needed)")
             return false
         }
-        
+
         // Same URL = No change
         if (confirmedUrl == newUrl) {
             return false
         }
-        
+
         // Normalize URLs for comparison (ignore protocol, trailing slash, case)
         val normalize = { url: String ->
             url.trim()
@@ -361,20 +364,20 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                 .removeSuffix("/")
                 .lowercase()
         }
-        
+
         val confirmedNormalized = normalize(confirmedUrl)
         val newNormalized = normalize(newUrl)
-        
+
         // Check if normalized URLs differ
         val changed = confirmedNormalized != newNormalized
-        
+
         if (changed) {
             Logger.d(TAG, "Server URL changed: '$confirmedNormalized' → '$newNormalized'")
         }
-        
+
         return changed
     }
-    
+
     fun testConnection() {
         viewModelScope.launch {
             _serverStatus.value = ServerStatus.Checking
@@ -398,25 +401,25 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     fun checkServerStatus() {
         // 🌟 v1.6.0: Respect offline mode first
         if (_offlineMode.value) {
             _serverStatus.value = ServerStatus.OfflineMode
             return
         }
-        
+
         // 🌟 v1.6.0: Check if host is configured
         val serverHost = _serverHost.value
         if (serverHost.isEmpty()) {
             _serverStatus.value = ServerStatus.NotConfigured
             return
         }
-        
+
         // Construct full URL
         val prefix = if (_isHttps.value) "https://" else "http://"
         val serverUrl = prefix + serverHost
-        
+
         viewModelScope.launch {
             _serverStatus.value = ServerStatus.Checking
             val isReachable = withContext(Dispatchers.IO) {
@@ -436,14 +439,14 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             _serverStatus.value = if (isReachable) ServerStatus.Reachable else ServerStatus.Unreachable(null)
         }
     }
-    
+
     fun syncNow() {
         if (_isSyncing.value) return
         viewModelScope.launch {
             _isSyncing.value = true
             try {
                 val syncService = WebDavSyncService(getApplication())
-                
+
                 // 🆕 v1.7.0: Zentrale Sync-Gate Prüfung
                 val gateResult = syncService.canSync()
                 if (!gateResult.canSync) {
@@ -454,14 +457,14 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                     }
                     return@launch
                 }
-                
+
                 emitToast(getString(R.string.toast_syncing))
-                
+
                 if (!syncService.hasUnsyncedChanges()) {
                     emitToast(getString(R.string.toast_already_synced))
                     return@launch
                 }
-                
+
                 val result = syncService.syncNotes()
                 if (result.isSuccess) {
                     emitToast(getString(R.string.toast_sync_success, result.syncedCount))
@@ -475,15 +478,15 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Sync Settings Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     fun setAutoSync(enabled: Boolean) {
         _autoSyncEnabled.value = enabled
         prefs.edit().putBoolean(Constants.KEY_AUTO_SYNC, enabled).apply()
-        
+
         viewModelScope.launch {
             if (enabled) {
                 // v1.5.0 Fix: Trigger battery optimization check and network monitor restart
@@ -496,7 +499,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     fun setSyncInterval(minutes: Long) {
         _syncInterval.value = minutes
         prefs.edit().putLong(Constants.PREF_SYNC_INTERVAL_MINUTES, minutes).apply()
@@ -521,19 +524,19 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     }
 
     // 🌟 v1.6.0: Configurable Sync Triggers Setters
-    
+
     fun setTriggerOnSave(enabled: Boolean) {
         _triggerOnSave.value = enabled
         prefs.edit().putBoolean(Constants.KEY_SYNC_TRIGGER_ON_SAVE, enabled).apply()
         Logger.d(TAG, "Trigger onSave: $enabled")
     }
-    
+
     fun setTriggerOnResume(enabled: Boolean) {
         _triggerOnResume.value = enabled
         prefs.edit().putBoolean(Constants.KEY_SYNC_TRIGGER_ON_RESUME, enabled).apply()
         Logger.d(TAG, "Trigger onResume: $enabled")
     }
-    
+
     fun setTriggerWifiConnect(enabled: Boolean) {
         _triggerWifiConnect.value = enabled
         prefs.edit().putBoolean(Constants.KEY_SYNC_TRIGGER_WIFI_CONNECT, enabled).apply()
@@ -542,7 +545,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         }
         Logger.d(TAG, "Trigger WiFi-Connect: $enabled")
     }
-    
+
     fun setTriggerPeriodic(enabled: Boolean) {
         _triggerPeriodic.value = enabled
         prefs.edit().putBoolean(Constants.KEY_SYNC_TRIGGER_PERIODIC, enabled).apply()
@@ -551,13 +554,13 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         }
         Logger.d(TAG, "Trigger Periodic: $enabled")
     }
-    
+
     fun setTriggerBoot(enabled: Boolean) {
         _triggerBoot.value = enabled
         prefs.edit().putBoolean(Constants.KEY_SYNC_TRIGGER_BOOT, enabled).apply()
         Logger.d(TAG, "Trigger Boot: $enabled")
     }
-    
+
     /**
      * 🎉 v1.7.0: Set WiFi-only sync mode
      * When enabled, sync only happens when connected to WiFi
@@ -567,11 +570,11 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         prefs.edit().putBoolean(Constants.KEY_WIFI_ONLY_SYNC, enabled).apply()
         Logger.d(TAG, "📡 WiFi-only sync: $enabled")
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Markdown Settings Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     fun setMarkdownAutoSync(enabled: Boolean) {
         if (enabled) {
             // v1.5.0 Fix: Perform initial export when enabling (like old SettingsActivity)
@@ -581,21 +584,20 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                     val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, "") ?: ""
                     val username = prefs.getString(Constants.KEY_USERNAME, "") ?: ""
                     val password = prefs.getString(Constants.KEY_PASSWORD, "") ?: ""
-                    
+
                     if (serverUrl.isBlank() || username.isBlank() || password.isBlank()) {
                         emitToast(getString(R.string.toast_configure_server_first))
                         // Don't enable - revert state
                         return@launch
                     }
-                    
+
                     // Check if there are notes to export
-                    val noteStorage = dev.dettmer.simplenotes.storage.NotesStorage(getApplication())
-                    val noteCount = noteStorage.loadAllNotes().size
-                    
+                    val noteCount = storage.loadAllNotes().size
+
                     if (noteCount > 0) {
                         // Show progress and perform initial export
                         _markdownExportProgress.value = MarkdownExportProgress(0, noteCount)
-                        
+
                         val syncService = WebDavSyncService(getApplication())
                         val exportedCount = withContext(Dispatchers.IO) {
                             syncService.exportAllNotesToMarkdown(
@@ -607,22 +609,22 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                                 }
                             )
                         }
-                        
+
                         // Export successful - save settings
                         _markdownAutoSync.value = true
                         prefs.edit()
                             .putBoolean(Constants.KEY_MARKDOWN_EXPORT, true)
                             .putBoolean(Constants.KEY_MARKDOWN_AUTO_IMPORT, true)
                             .apply()
-                        
+
                         _markdownExportProgress.value = MarkdownExportProgress(noteCount, noteCount, isComplete = true)
                         emitToast(getString(R.string.toast_markdown_exported, exportedCount))
-                        
+
                         @Suppress("MagicNumber") // UI progress delay
                         // Clear progress after short delay
                         kotlinx.coroutines.delay(500)
                         _markdownExportProgress.value = null
-                        
+
                     } else {
                         // No notes - just enable the feature
                         _markdownAutoSync.value = true
@@ -632,7 +634,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                             .apply()
                         emitToast(getString(R.string.toast_markdown_enabled))
                     }
-                    
+
                 } catch (e: Exception) {
                     _markdownExportProgress.value = null
                     emitToast(getString(R.string.toast_export_failed, e.message ?: ""))
@@ -651,14 +653,14 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     fun performManualMarkdownSync() {
         // 🌟 v1.6.0: Block in offline mode
         if (_offlineMode.value) {
             Logger.d(TAG, "⏭️ Manual Markdown sync blocked: Offline mode enabled")
             return
         }
-        
+
         viewModelScope.launch {
             try {
                 emitToast(getString(R.string.toast_markdown_syncing))
@@ -670,28 +672,28 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Backup Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     fun createBackup(uri: Uri, password: String? = null) {
         viewModelScope.launch {
             _isBackupInProgress.value = true
             _backupStatusText.value = getString(R.string.backup_progress_creating)
             try {
                 val result = backupManager.createBackup(uri, password)
-                
+
                 // Phase 2: Show completion status
                 _backupStatusText.value = if (result.success) {
                     getString(R.string.backup_progress_complete)
                 } else {
                     getString(R.string.backup_progress_failed)
                 }
-                
+
                 // Phase 3: Clear after delay
                 delay(if (result.success) STATUS_CLEAR_DELAY_SUCCESS_MS else STATUS_CLEAR_DELAY_ERROR_MS)
-                
+
             } catch (e: Exception) {
                 Logger.e(TAG, "Failed to create backup", e)
                 _backupStatusText.value = getString(R.string.backup_progress_failed)
@@ -702,24 +704,24 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     fun restoreFromFile(uri: Uri, mode: RestoreMode, password: String? = null) {
         viewModelScope.launch {
             _isBackupInProgress.value = true
             _backupStatusText.value = getString(R.string.backup_progress_restoring)
             try {
                 val result = backupManager.restoreBackup(uri, mode, password)
-                
+
                 // Phase 2: Show completion status
                 _backupStatusText.value = if (result.success) {
                     getString(R.string.restore_progress_complete)
                 } else {
                     getString(R.string.restore_progress_failed)
                 }
-                
+
                 // Phase 3: Clear after delay
                 delay(if (result.success) STATUS_CLEAR_DELAY_SUCCESS_MS else STATUS_CLEAR_DELAY_ERROR_MS)
-                
+
             } catch (e: Exception) {
                 Logger.e(TAG, "Failed to restore backup from file", e)
                 _backupStatusText.value = getString(R.string.restore_progress_failed)
@@ -730,7 +732,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     /**
      * 🔐 v1.7.0: Check if backup is encrypted and call appropriate callback
      */
@@ -753,7 +755,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     fun restoreFromServer(mode: RestoreMode) {
         viewModelScope.launch {
             _isBackupInProgress.value = true
@@ -763,17 +765,17 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
                 val result = withContext(Dispatchers.IO) {
                     syncService.restoreFromServer(mode)
                 }
-                
+
                 // Phase 2: Show completion status
                 _backupStatusText.value = if (result.isSuccess) {
                     getString(R.string.restore_server_progress_complete)
                 } else {
                     getString(R.string.restore_server_progress_failed)
                 }
-                
+
                 // Phase 3: Clear after delay
                 delay(if (result.isSuccess) STATUS_CLEAR_DELAY_SUCCESS_MS else STATUS_CLEAR_DELAY_ERROR_MS)
-                
+
             } catch (e: Exception) {
                 Logger.e(TAG, "Failed to restore from server", e)
                 _backupStatusText.value = getString(R.string.restore_server_progress_failed)
@@ -784,11 +786,11 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Debug Settings Actions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     fun setFileLogging(enabled: Boolean) {
         _fileLoggingEnabled.value = enabled
         prefs.edit().putBoolean(Constants.KEY_FILE_LOGGING_ENABLED, enabled).apply()
@@ -797,7 +799,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             emitToast(if (enabled) getString(R.string.toast_file_logging_enabled) else getString(R.string.toast_file_logging_disabled))
         }
     }
-    
+
     fun clearLogs() {
         viewModelScope.launch {
             try {
@@ -808,9 +810,9 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             }
         }
     }
-    
+
     fun getLogFile() = Logger.getLogFile(getApplication())
-    
+
     /**
      * v1.8.0: Reset changelog version to force showing the changelog dialog on next start
      * Used for testing the post-update changelog feature
@@ -820,11 +822,11 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
             .putInt(Constants.KEY_LAST_SHOWN_CHANGELOG_VERSION, 0)
             .apply()
     }
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // Helper
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     /**
      * Check if server is configured AND not in offline mode
      * v1.6.0: Returns false if offline mode is enabled
@@ -832,16 +834,16 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     fun isServerConfigured(): Boolean {
         // Offline mode takes priority
         if (_offlineMode.value) return false
-        
+
         val serverUrl = prefs.getString(Constants.KEY_SERVER_URL, null)
-        return !serverUrl.isNullOrEmpty() && 
-               serverUrl != "http://" && 
+        return !serverUrl.isNullOrEmpty() &&
+               serverUrl != "http://" &&
                serverUrl != "https://"
     }
-    
+
     /**
      * 🌍 v1.7.1: Get string resources with correct app locale
-     * 
+     *
      * AndroidViewModel uses Application context which may not have the correct locale
      * applied when using per-app language settings. We need to get a Context that
      * respects AppCompatDelegate.getApplicationLocales().
@@ -860,7 +862,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         }
         return context.getString(resId)
     }
-    
+
     private fun getString(resId: Int, vararg formatArgs: Any): String {
         // Get context with correct locale configuration from AppCompatDelegate
         val appLocales = androidx.appcompat.app.AppCompatDelegate.getApplicationLocales()
@@ -875,11 +877,11 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         }
         return context.getString(resId, *formatArgs)
     }
-    
+
     private suspend fun emitToast(message: String) {
         _showToast.emit(message)
     }
-    
+
     /**
      * Server status states
      * v1.6.0: Added OfflineMode state
@@ -892,7 +894,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         data object Reachable : ServerStatus()
         data class Unreachable(val error: String?) : ServerStatus()
     }
-    
+
     /**
      * Events for Activity-level actions (dialogs, intents, etc.)
      * v1.5.0: Ported from old SettingsActivity
@@ -901,7 +903,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         data object RequestBatteryOptimization : SettingsEvent()
         data object RestartNetworkMonitor : SettingsEvent()
     }
-    
+
     /**
      * Progress state for Markdown export
      * v1.5.0: For initial export progress dialog
@@ -911,11 +913,11 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
         val total: Int,
         val isComplete: Boolean = false
     )
-    
+
     // ═══════════════════════════════════════════════════════════════════════
     // 🎨 v1.7.0: Display Mode Functions
     // ═══════════════════════════════════════════════════════════════════════
-    
+
     /**
      * Set display mode (list or grid)
      */

android/app/src/main/java/dev/dettmer/simplenotes/widget/NoteWidget.kt

@@ -1,6 +1,7 @@
 package dev.dettmer.simplenotes.widget
 
 import android.content.Context
+import android.content.SharedPreferences
 import androidx.compose.ui.unit.DpSize
 import androidx.compose.ui.unit.dp
 import androidx.datastore.preferences.core.Preferences
@@ -12,6 +13,9 @@ import androidx.glance.appwidget.provideContent
 import androidx.glance.currentState
 import androidx.glance.state.PreferencesGlanceStateDefinition
 import dev.dettmer.simplenotes.storage.NotesStorage
+import kotlinx.coroutines.runBlocking
+import org.koin.java.KoinJavaComponent.inject
+import kotlin.getValue
 
 /**
  * 🆕 v1.8.0: Homescreen Widget für Notizen und Checklisten
@@ -52,10 +56,11 @@ class NoteWidget : GlanceAppWidget() {
         )
     )
 
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+
     override val stateDefinition = PreferencesGlanceStateDefinition
 
     override suspend fun provideGlance(context: Context, id: GlanceId) {
-        val storage = NotesStorage(context)
 
         provideContent {
             val prefs = currentState<Preferences>()
@@ -65,7 +70,7 @@ class NoteWidget : GlanceAppWidget() {
             val bgOpacity = prefs[NoteWidgetState.KEY_BACKGROUND_OPACITY] ?: 1.0f
 
             val note = noteId?.let { nId ->
-                storage.loadNote(nId)
+                runBlocking { storage.loadNote(nId) }
             }
 
             GlanceTheme {

android/app/src/main/java/dev/dettmer/simplenotes/widget/NoteWidgetActions.kt

@@ -9,6 +9,7 @@ import dev.dettmer.simplenotes.models.ChecklistSortOption
 import dev.dettmer.simplenotes.models.SyncStatus
 import dev.dettmer.simplenotes.storage.NotesStorage
 import dev.dettmer.simplenotes.utils.Logger
+import org.koin.java.KoinJavaComponent.inject
 
 /**
  * 🆕 v1.8.0: ActionParameter Keys für Widget-Interaktionen
@@ -35,6 +36,9 @@ class ToggleChecklistItemAction : ActionCallback {
         private const val TAG = "ToggleChecklistItem"
     }
 
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+
+
     override suspend fun onAction(
         context: Context,
         glanceId: GlanceId,
@@ -43,7 +47,6 @@ class ToggleChecklistItemAction : ActionCallback {
         val noteId = parameters[NoteWidgetActionKeys.KEY_NOTE_ID] ?: return
         val itemId = parameters[NoteWidgetActionKeys.KEY_ITEM_ID] ?: return
 
-        val storage = NotesStorage(context)
         val note = storage.loadNote(noteId) ?: return
 
         val updatedItems = note.checklistItems?.map { item ->
@@ -167,11 +170,11 @@ class OpenConfigAction : ActionCallback {
         updateAppWidgetState(context, glanceId) { prefs ->
             prefs[NoteWidgetState.KEY_SHOW_OPTIONS] = false
         }
-        
+
         // Config-Activity als Reconfigure öffnen
         val glanceManager = androidx.glance.appwidget.GlanceAppWidgetManager(context)
         val appWidgetId = glanceManager.getAppWidgetId(glanceId)
-        
+
         val intent = android.content.Intent(context, NoteWidgetConfigActivity::class.java).apply {
             putExtra(android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId)
             // 🐛 FIX: Eigener Task, damit finish() nicht die MainActivity zeigt

android/app/src/main/java/dev/dettmer/simplenotes/widget/NoteWidgetConfigActivity.kt

@@ -14,6 +14,8 @@ import androidx.lifecycle.lifecycleScope
 import dev.dettmer.simplenotes.storage.NotesStorage
 import dev.dettmer.simplenotes.ui.theme.SimpleNotesTheme
 import kotlinx.coroutines.launch
+import org.koin.java.KoinJavaComponent.inject
+import kotlin.getValue
 
 /**
  * 🆕 v1.8.0: Konfigurations-Activity beim Platzieren eines Widgets
@@ -40,6 +42,8 @@ class NoteWidgetConfigActivity : ComponentActivity() {
     private var currentLockState: Boolean = false
     private var currentOpacity: Float = 1.0f
 
+    private val storage: NotesStorage by inject(NotesStorage::class.java)
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
@@ -69,13 +73,12 @@ class NoteWidgetConfigActivity : ComponentActivity() {
             return
         }
 
-        val storage = NotesStorage(this)
-
         // Bestehende Konfiguration laden (für Reconfigure)
         lifecycleScope.launch {
             var existingNoteId: String? = null
             var existingLock = false
             var existingOpacity = 1.0f
+            val notes = storage.loadAllNotes()
 
             try {
                 val glanceId = GlanceAppWidgetManager(this@NoteWidgetConfigActivity)
@@ -100,7 +103,7 @@ class NoteWidgetConfigActivity : ComponentActivity() {
             setContent {
                 SimpleNotesTheme {
                     NoteWidgetConfigScreen(
-                        storage = storage,
+                        notes = notes,
                         initialLock = existingLock,
                         initialOpacity = existingOpacity,
                         selectedNoteId = existingNoteId,
@@ -145,7 +148,7 @@ class NoteWidgetConfigActivity : ComponentActivity() {
                 AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId
             )
             setResult(RESULT_OK, resultIntent)
-            
+
             // 🐛 FIX: Zurück zum Homescreen statt zur MainActivity
             // moveTaskToBack() bringt den Task in den Hintergrund → Homescreen wird sichtbar
             if (!isTaskRoot) {

android/app/src/main/java/dev/dettmer/simplenotes/widget/NoteWidgetConfigScreen.kt

@@ -41,7 +41,6 @@ import androidx.compose.ui.unit.dp
 import dev.dettmer.simplenotes.R
 import dev.dettmer.simplenotes.models.Note
 import dev.dettmer.simplenotes.models.NoteType
-import dev.dettmer.simplenotes.storage.NotesStorage
 import kotlin.math.roundToInt
 
 /**
@@ -59,16 +58,16 @@ private const val NOTE_PREVIEW_MAX_LENGTH = 50
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun NoteWidgetConfigScreen(
-    storage: NotesStorage,
+    notes: List<Note>,
     initialLock: Boolean = false,
     initialOpacity: Float = 1.0f,
     selectedNoteId: String? = null,
-    onNoteSelected: (noteId: String, isLocked: Boolean, opacity: Float) -> Unit,
-    onSave: ((noteId: String, isLocked: Boolean, opacity: Float) -> Unit)? = null,
-    onSettingsChanged: ((noteId: String?, isLocked: Boolean, opacity: Float) -> Unit)? = null,
+    onNoteSelected: (String, Boolean, Float) -> Unit,
+    onSave: ((String, Boolean, Float) -> Unit)? = null,
+    onSettingsChanged: ((String?, Boolean, Float) -> Unit)? = null,
     @Suppress("UNUSED_PARAMETER") onCancel: () -> Unit  // Reserved for future use
 ) {
-    val allNotes = remember { storage.loadAllNotes().sortedByDescending { it.updatedAt } }
+    val allNotes = remember { notes.sortedByDescending { it.updatedAt } }
     var lockWidget by remember { mutableStateOf(initialLock) }
     var opacity by remember { mutableFloatStateOf(initialOpacity) }
     var currentSelectedId by remember { mutableStateOf(selectedNoteId) }

android/app/src/test/java/dev/dettmer/simplenotes/ExampleUnitTest.kt

@@ -1,17 +0,0 @@
-package dev.dettmer.simplenotes
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}

android/gradle/libs.versions.toml

@@ -16,6 +16,9 @@ composeBom = "2026.01.00"
 navigationCompose = "2.7.6"
 lifecycleRuntimeCompose = "2.7.0"
 activityCompose = "1.8.2"
+room = "2.6.1"
+ksp = "2.0.21-1.0.27"
+koin = "3.5.3"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -37,6 +40,14 @@ androidx-compose-material-icons = { group = "androidx.compose.material", name =
 androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
 androidx-navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
 androidx-lifecycle-runtime-compose = { group = "androidx.lifecycle", name = "lifecycle-runtime-compose", version.ref = "lifecycleRuntimeCompose" }
+# Room Database
+room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room" }
+room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
+room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
+# Core Koin for Kotlin projects
+koin-android = { group = "io.insert-koin", name = "koin-android", version.ref = "koin" }
+# Koin for Jetpack Compose integration
+koin-androidx-compose = { group = "io.insert-koin", name = "koin-androidx-compose", version.ref = "koin" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
@@ -44,4 +55,5 @@ kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
 ktlint = { id = "org.jlleitschuh.gradle.ktlint", version.ref = "ktlint" }
 detekt = { id = "io.gitlab.arturbosch.detekt", version.ref = "detekt" }
+ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }