initial vibecoded release

lib/repositories/local_note_repository.dart

@@ -0,0 +1,65 @@
+import 'package:sqflite/sqflite.dart';
+import 'package:path/path.dart';
+
+import '../models/note.dart';
+import 'note_repository.dart';
+
+class LocalNoteRepository implements NoteRepository {
+  static Database? _db;
+
+  Future<Database> get _database async {
+    _db ??= await _initDb();
+    return _db!;
+  }
+
+  Future<Database> _initDb() async {
+    final dbPath = await getDatabasesPath();
+    final path = join(dbPath, 'notes.db');
+
+    return openDatabase(
+      path,
+      version: 1,
+      onCreate: (db, version) => db.execute('''
+        CREATE TABLE notes (
+          id         TEXT PRIMARY KEY,
+          title      TEXT NOT NULL,
+          content    TEXT NOT NULL,
+          created_at TEXT NOT NULL,
+          updated_at TEXT NOT NULL
+        )
+      '''),
+    );
+  }
+
+  @override
+  Future<List<Note>> getAll() async {
+    final db = await _database;
+    final rows = await db.query('notes', orderBy: 'updated_at DESC');
+    return rows.map(Note.fromMap).toList();
+  }
+
+  @override
+  Future<Note?> getById(String id) async {
+    final db = await _database;
+    final rows = await db.query('notes', where: 'id = ?', whereArgs: [id]);
+    if (rows.isEmpty) return null;
+    return Note.fromMap(rows.first);
+  }
+
+  @override
+  Future<Note> save(Note note) async {
+    final db = await _database;
+    await db.insert(
+      'notes',
+      note.toMap(),
+      conflictAlgorithm: ConflictAlgorithm.replace,
+    );
+    return note;
+  }
+
+  @override
+  Future<void> delete(String id) async {
+    final db = await _database;
+    await db.delete('notes', where: 'id = ?', whereArgs: [id]);
+  }
+}