fix(tours): sorts that name their order, the note focused without autofocus

The checklist and the obstacle data sorted texts without a compare
function. They now sort by code units through one shared compareCodeUnits,
the order a bare sort gave, the same on every machine; the material data of
a lock's parts no longer orders by the server's locale, so its hash cannot
change with it. The note editor takes the focus through a ref instead of
autoFocus, a direct function reference in a map becomes a call, and the
GPX import's default fields are a named constant.

shared/src/common/compare.spec.ts

@@ -0,0 +1,13 @@
+import { compareCodeUnits } from './compare';
+
+import { describe, expect, it } from 'vitest';
+
+describe('compareCodeUnits', () => {
+  it('orders as a bare sort does, whatever the locale', () => {
+    const texts = ['way/3', 'node/10', 'node/2', 'Node/1', 'check_date', 'canoe', '2026-09-30', '2026-10-01'];
+    expect([...texts].sort(compareCodeUnits)).toEqual([...texts].sort());
+    expect(compareCodeUnits('a', 'a')).toBe(0);
+    expect(compareCodeUnits('a', 'b')).toBe(-1);
+    expect(compareCodeUnits('b', 'a')).toBe(1);
+  });
+});

shared/src/common/compare.ts

@@ -0,0 +1,9 @@
+/**
+ * Two texts by their UTF-16 code units: the order a bare `sort()` gives, and
+ * the same on every machine. A hash or a key built over the order must not
+ * depend on the locale the code runs in, as `localeCompare` does.
+ */
+export function compareCodeUnits(a: string, b: string): number {
+  if (a === b) return 0;
+  return a < b ? -1 : 1;
+}