Calculating the distance (#255)

* migra for distance

* adding distance calculator

* adding ability to store home address

* improve distance calculation

* calculating distance

* show distance in grid view

* upgrading dependencies

* moving to react 19

* ability to clone a job

* fixing tests

* polishing

lib/services/storage/migrations/sql/8.distances.js

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2026 by Christian Kellner.
+ * Licensed under Apache-2.0 with Commons Clause and Attribution/Naming Clause
+ */
+
+// Migration: Removing city field and adding distance field
+
+export function up(db) {
+  db.exec(`
+    ALTER TABLE listings ADD COLUMN distance_to_destination INTEGER;
+  `);
+}

lib/services/storage/migrations/sql/9.user-settings-unique-constraint.js

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2026 by Christian Kellner.
+ * Licensed under Apache-2.0 with Commons Clause and Attribution/Naming Clause
+ */
+
+export function up(db) {
+  // 1. Remove old unique index
+  db.exec(`DROP INDEX IF EXISTS idx_settings_name;`);
+
+  // 2. Add new unique index for name and user_id.
+  // Since user_id can be NULL, we need a special index or use coalesce for the index.
+  // In SQLite, multiple NULLs are allowed in a UNIQUE index, which is fine for our global settings (user_id IS NULL).
+  // But we want only one global setting for a given name.
+  // Actually, in SQLite, UNIQUE allows multiple NULL values.
+  // To have only one NULL user_id for a name, we can use a partial index or COALESCE.
+
+  db.exec(`
+    CREATE UNIQUE INDEX idx_settings_name_user_id ON settings (name, IFNULL(user_id, 'GLOBAL_SETTING'));
+  `);
+}