refactor: Improve code formatting and readability in database and note repository

lib/data/note_repository.dart

@@ -6,14 +6,15 @@ import 'package:notas/models/note.dart';
 import 'package:notas/models/category.dart';
 
 import 'package:notas/data/note_encryption.dart';
+
 class NoteRepository {
   NoteRepository({
     required AppDatabase database,
     required AuthApi authApi,
-      required String masterKey,
-    })  : _database = database,
-      _authApi = authApi,
-      _masterKey = masterKey;
+    required String masterKey,
+  }) : _database = database,
+       _authApi = authApi,
+       _masterKey = masterKey;
 
   final AppDatabase _database;
   final AuthApi _authApi;
@@ -42,7 +43,9 @@ class NoteRepository {
   }
 
   Future<Note> updateNote(Note note) async {
-    final int noteId = note.id ?? (throw ArgumentError('Note id is required to update a note.'));
+    final int noteId =
+        note.id ??
+        (throw ArgumentError('Note id is required to update a note.'));
 
     await _database.updateNoteRow(
       DbNote(
@@ -63,16 +66,17 @@ class NoteRepository {
   }
 
   Future<void> deleteNote(Note note) async {
-    final int noteId = note.id ?? (throw ArgumentError('Note id is required to delete a note.'));
+    final int noteId =
+        note.id ??
+        (throw ArgumentError('Note id is required to delete a note.'));
 
-    await _database.deleteNoteAndShift(
-      id: noteId,
-      removedIndex: note.index,
-    );
+    await _database.deleteNoteAndShift(id: noteId, removedIndex: note.index);
   }
 
   Future<void> moveNote(Note note, int newIndex) async {
-    final int noteId = note.id ?? (throw ArgumentError('Note id is required to reorder a note.'));
+    final int noteId =
+        note.id ??
+        (throw ArgumentError('Note id is required to reorder a note.'));
 
     await _database.moveNote(
       id: noteId,
@@ -89,19 +93,39 @@ class NoteRepository {
     try {
       // Get last sync timestamp
       final DateTime? lastSync = await _authApi.getLastSyncAt();
-      final DateTime? lastSyncForRequest = forceFull ? DateTime.utc(1970, 1, 1) : lastSync;
-      
-      // Collect pending changes
-      final List<DbNote> unsyncedNotes = await _database.getUnsyncedNotes();
-      final List<DbCategory> unsyncedCategories = await _database.getUnsyncedCategories();
+      final DateTime? lastSyncForRequest = forceFull
+          ? DateTime.utc(1970, 1, 1)
+          : lastSync;
+
+      // Collect pending local changes.
+      // If we already synced at least once, use updatedAt to avoid re-sending
+      // old notes that were already uploaded.
+      final List<DbNote> unsyncedNotes;
+      final List<DbCategory> unsyncedCategories;
+
+      if (forceFull || lastSync == null) {
+        unsyncedNotes = await _database.getUnsyncedNotes();
+        unsyncedCategories = await _database.getUnsyncedCategories();
+      } else {
+        unsyncedNotes = await _database.getNotesChangedSince(lastSync);
+        unsyncedCategories = await _database.getCategoriesChangedSince(
+          lastSync,
+        );
+      }
 
       // Build sync request (note: we send encrypted data, but locally we have plaintext)
       // Encrypt all notes before sending
       final List<SyncNotePayload> encryptedNotesPayload = [];
       for (final dbNote in unsyncedNotes) {
         final note = _fromDbNote(dbNote);
-        final encryptedTitle = await NoteEncryption.encryptNote(note.title, _masterKey);
-        final encryptedBody = await NoteEncryption.encryptNote(note.body, _masterKey);
+        final encryptedTitle = await NoteEncryption.encryptNote(
+          note.title,
+          _masterKey,
+        );
+        final encryptedBody = await NoteEncryption.encryptNote(
+          note.body,
+          _masterKey,
+        );
         encryptedNotesPayload.add(
           SyncNotePayload.fromNote(
             note,
@@ -112,9 +136,7 @@ class NoteRepository {
       }
 
       final List<SyncCategoryPayload> categoriesPayload = unsyncedCategories
-          .map((cat) => SyncCategoryPayload.fromCategory(
-                _fromDbCategory(cat),
-              ))
+          .map((cat) => SyncCategoryPayload.fromCategory(_fromDbCategory(cat)))
           .toList();
 
       final SyncRequest syncRequest = SyncRequest(
@@ -126,8 +148,7 @@ class NoteRepository {
       );
 
       // Call sync API
-      final Map<String, dynamic> syncResult =
-          await _authApi.sync(syncRequest);
+      final Map<String, dynamic> syncResult = await _authApi.sync(syncRequest);
 
       if (syncResult['error'] == true) {
         return {'error': true, 'message': syncResult['body']};
@@ -154,7 +175,8 @@ class NoteRepository {
 
   Future<void> _applySyncResponse(SyncResponse response) async {
     // Apply categories from server
-    for (final SyncCategoryResponse catResponse in response.changes.categories) {
+    for (final SyncCategoryResponse catResponse
+        in response.changes.categories) {
       await _database.upsertCategory(
         CategoriesCompanion(
           uuid: Value(catResponse.id),
@@ -168,9 +190,9 @@ class NoteRepository {
 
     // Apply notes from server
     for (final SyncNoteResponse noteResponse in response.changes.notes) {
-      final existingNote = await (_database.select(_database.notes)
-            ..where((n) => n.uuid.equals(noteResponse.id)))
-          .getSingleOrNull();
+      final existingNote = await (_database.select(
+        _database.notes,
+      )..where((n) => n.uuid.equals(noteResponse.id))).getSingleOrNull();
 
       // Decrypt note content
       String decryptedTitle = 'Encrypted';
@@ -207,7 +229,9 @@ class NoteRepository {
         );
       } else {
         // Insert new note
-        await _database.into(_database.notes).insert(
+        await _database
+            .into(_database.notes)
+            .insert(
               NotesCompanion(
                 uuid: Value(noteResponse.id),
                 title: Value(decryptedTitle),