Ensure project is properly named across all files.

lib/models/expense.dart

@@ -1,5 +1,5 @@
 // Local
-import 'package:flutter_expense_tracker/models/item_type.dart';
+import '/models/item_type.dart';
 
 import '/models/tracked_item.dart';
 import '/models/frequency.dart';

lib/models/tracked_item.dart

@@ -1,5 +1,5 @@
 // Local
-import 'package:flutter_expense_tracker/models/item_type.dart';
+import '/models/item_type.dart';
 
 import '/models/frequency.dart';
 
@@ -37,17 +37,19 @@ abstract class TrackedItem {
   }
 
   Map<String, dynamic> toMap() {
-    return frequency == null ? {
-      'id': id,
-      'name': name,
-      'amount': amount,
-      'description': description,
-    } : {
-      'id': id,
-      'name': name,
-      'amount': amount,
-      'frequency': frequency!.title,
-      'description': description,
-    };
+    return frequency == null
+        ? {
+            'id': id,
+            'name': name,
+            'amount': amount,
+            'description': description,
+          }
+        : {
+            'id': id,
+            'name': name,
+            'amount': amount,
+            'frequency': frequency!.title,
+            'description': description,
+          };
   }
 }