chore(release): v1.4.0

Shortcuts gain several bindings per action, mouse buttons and a searchable
picker, and the stored shortcut schema changes shape, so this is a minor bump.
Existing shortcuts migrate on first launch.

Play release notes state that this release carries no mobile feature changes;
the work is desktop-only.

packages/api-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@d3ro/api-client",
-  "version": "1.3.7",
+  "version": "1.4.0",
   "private": true,
   "description": "D3RO Voice API 클라이언트 — Supabase 래퍼 (web/desktop/mobile 공유)",
   "license": "MIT",