[storage] change schema a little

lib/screens/settings.dart

@@ -0,0 +1,56 @@
+import 'package:flutter/material.dart';
+import 'package:fooder/screens/based.dart';
+import 'package:fooder/components/button.dart';
+
+class SettingsScreen extends BasedScreen {
+  const SettingsScreen({super.key, required super.ctx});
+
+  @override
+  State<SettingsScreen> createState() => _SettingsScreen();
+}
+
+class _SettingsScreen extends BasedState<SettingsScreen> {
+  Future<void> resetStorage() async {
+    try {
+      ctx.storage.reset();
+      showText("Storage reset");
+    } catch (e) {
+      showError(e.toString());
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    var theme = Theme.of(context);
+    var colorScheme = theme.colorScheme;
+
+    return Scaffold(
+      extendBodyBehindAppBar: false,
+      extendBody: true,
+      appBar: appBar(),
+      bottomNavigationBar: navBar(),
+      body: Center(
+        child: Container(
+          constraints: const BoxConstraints(maxWidth: 600),
+          padding: const EdgeInsets.all(10),
+          child: AutofillGroup(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.start,
+              children: <Widget>[
+                Icon(
+                  Icons.verified_user_sharp,
+                  size: 100,
+                  color: colorScheme.primary.withOpacity(0.85),
+                ),
+                FButton(
+                  labelText: 'Reset local storage',
+                  onPressed: resetStorage,
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/storage/diary.dart

@@ -0,0 +1,43 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:sqflite/sqflite.dart';
+import 'package:fooder/models/diary.dart';
+import 'package:fooder/storage/based.dart';
+
+class DiaryStorage extends StorageBased {
+  DiaryStorage({required super.db});
+
+  static Future<void> createTable(Batch batch) async {
+    batch.execute('''
+      CREATE TABLE diary(
+        date TEXT PRIMARY KEY,
+        content TEXT,
+        needs_sync BOOLEAN,
+        last_sync TEXT
+      )
+    ''');
+  }
+
+  Future<Diary?> get({required DateTime date}) async {
+    var result = await db
+        .query('diary', where: 'date = ?', whereArgs: [date.toIso8601String()]);
+    if (result.isEmpty) {
+      return null;
+    }
+    return Diary.fromJson(
+        jsonDecode((result.first as Map<String, dynamic>)['content']));
+  }
+
+  Future<void> insert(Diary diary, {bool needsSync = false}) async {
+    var data = {
+      'id': diary.id,
+      'date': diary.date.toIso8601String(),
+      'content': jsonEncode(diary.toMap()),
+      'needs_sync': needsSync,
+      'last_sync': needsSync ? DateTime.now().toIso8601String() : null,
+    };
+    await db.insert('diary', data,
+        conflictAlgorithm: ConflictAlgorithm.replace);
+  }
+}

lib/storage/product.dart

@@ -10,7 +10,7 @@ class ProductStorage extends StorageBased {
   static Future<void> createTable(Batch batch) async {
     batch.execute('''
       CREATE TABLE product(
-        id INTEGER,
+        id INTEGER PRIMARY KEY,
         name TEXT,
         barcode TEXT,
         calories REAL,