feat(macos): configuration window + curl-backed macOS updater (#71)

src/settings/input-values.ts

@@ -0,0 +1,20 @@
+export type OptionalNumberInputParseResult =
+  | {
+      ok: true;
+      value: number | undefined;
+    }
+  | {
+      ok: false;
+    };
+
+export function parseOptionalNumberInputValue(value: string): OptionalNumberInputParseResult {
+  const raw = value.trim();
+  if (raw.length === 0) {
+    return { ok: true, value: undefined };
+  }
+  const next = Number(raw);
+  if (!Number.isFinite(next)) {
+    return { ok: false };
+  }
+  return { ok: true, value: next };
+}